HEALTH 7/10/08- 7/17/08 Weekly Bird Flu Thread:Genes identified for bird flu replication

JPD

Inactive
Experts identify genes for bird flu replication

http://uk.reuters.com/article/healthNews/idUKHKG1664320080709?rpc=401&

HONG KONG (Reuters) - Scientists have identified around 100 genes that the H5N1 bird flu virus needs in a host in order to replicate, and this finding may help in the hunt for ways to block its proliferation.

"All viruses rely on host cell proteins and their associated mechanisms to complete the viral life cycle. Identifying the host molecules that participate in each step of virus replication could provide valuable new targets for antiviral therapy," they wrote in the latest edition of Nature magazine.

In their study, the experts from Japan, Indonesia and the United States infected fruit fly cells with genetically altered H5N1 virus.

The H5N1 virus needed slight modifications because fruit flies are normally not susceptible to influenza.

The experts also chose the fruit fly because it has a relatively small number of genes -- 14,000 -- making it easier for scientists to study.

"We found genes (proteins) that are important for influenza virus replication. We identified about 100 genes," said Yoshihiro Kawaoka, a leading virologist and bird flu expert at the University of Tokyo in Japan.

Of these, at least three existed in human cells.

"We took three and tested them and they were important for flu virus replication (in humans)," he told Reuters.

"I presume that many of the other genes we identified are also important for influenza virus replication in humans."

Next, the team wants to zero in on host proteins that the H5N1 needs to bind to in order to replicate.

"If you could inhibit (block) the interaction between those (host) proteins and influenza virus proteins, you can inhibit virus replication. This can be a target for development of new drugs," Kawaoka said.

Although the H5N1 remains mainly a disease among birds, it has killed 243 of the 385 people it has infected since 2003.

Experts have warned for years now that it can trigger a pandemic killing millions of people if it ever becomes easily transmitted among humans.

Worse, it has also shown signs of developing resistance to the few available treatments.
 

JPD

Inactive
Many public firms not ready for flu pandemic

http://search.japantimes.co.jp/cgi-bin/nn20080710b6.html

Kyodo News

A majority of listed companies surveyed have devised no countermeasures for a new type of influenza that some fear may develop, a think tank survey showed Wednesday.

According to the InterRisk Research Institute & Consulting Inc. survey, 52 percent of 448 firms surveyed said they have no plans to work out measures against a possible new influenza pandemic for which people have little immunity.

The government has been urging companies to work out steps against a possible pandemic because such an event could paralyze the country.

The think tank, a research arm of Mitsui Sumitomo Insurance Co., mailed questionnaires to all listed companies in Japan — about 4,000 — from May to June, and received responses from 448, including 194 in the manufacturing sector.

Of the 448 firms, 10 percent said they have already worked out flu measures, 14 percent are working on them and 23 percent plan to do so.

Among companies with no plans to compile measures, 55 percent said devising effective steps would be beyond the capability of an individual company and 45 percent replied they have little knowledge about symptoms of a new influenza.

Twenty-four percent said a new flu has yet to break out in Japan and 22 percent said coping with the disease is the responsibility of individual employees.

"The survey provided shocking results," said Shigeki Honda, an InterRisk official in charge of research and development. "Socially responsible corporate entities should work out measures against a flu pandemic."
 

JPD

Inactive
Avian flu response level lowered

http://www.news.gov.hk/en/category/healthandcommunity/080709/txt/080709en05004.htm

Secretary for Food & Health Dr York Chow has lowered the response level for avian flu to "alert" from "serious" after assessing the present risk the virus poses and environmental hygiene at retail outlets.

The measure to ban overnight stocking of live poultry in retail outlets has been in place since live chicken sales resumed July 2, to cut the risk of avian flu outbreaks.

The market operation was generally smooth and the environmental hygiene of retail outlets upgraded. Samples collected from chicken farms, wholesale market and retail outlets have been confirmed avian flu H5N1-free.

On the proposed buyout package, Dr Chow said most live poultry retailers will opt to wind up their business, while some may want to remain in the trade. Some farmers, wholesalers and transporters may also choose to stay in the trade.

He said the Government will assess the package's manpower implications for Government departments, but expected it will not significantly cut their workload.

Of the 52 poultry farmers in Hong Kong, 21 are operating on government land. If they choose to leave the trade the Lands Department will be informed to follow up. The Cheung Sha Wan Temporary Wholesale Poultry Market will be returned to the department if the trade no longer uses it.

As at July, 90 live poultry stalls in Food & Environmental Hygiene Department markets have been allowed to sell chilled poultry. If tenants of the other 170 live poultry stalls want to switch to selling chilled poultry, they can submit their applications and the department. Subject to actual demand in the market the department will consider letting out vacant live poultry stalls for the chilled poultry trade.
 

JPD

Inactive
(Vietnam)

Bird flu occurs in Tra Vinh

http://www.intellasia.net/news/articles/health/111246340.shtml

Bird flu has occurred in Tra Vinh province, announced the Veterinary Department.

The department said that ducks died in Phuong Thach commune, Cang Long district, Tra Vinh province, from June 24.

By July 4, around 1,000 unvaccinated ducks had died. Their samples were tested positive to H5N1 virus.

The local veterinary service culled the ducks.

So far, Quang Ngai and Tra Vinh provinces are yet to be free from bird flu for 21 days.
 

JPD

Inactive
Bird flu quarantine lifted in China's Guangdong

http://news.xinhuanet.com/english/2008-07/10/content_8524969.htm

BEIJING, July 10 (Xinhua) -- China lifted a bird flu quarantine in the southern province of Guangzhou on Thursday after no new cases were reported for 21 days.

The trade of live poultry within 13 km of the epidemic region was resumed on Thursday, the Ministry of Agriculture said.

An outbreak of bird flu occurred in Xinhui, Jiangmen City, on June 10 and killed 3,873 ducks and led to the culling of another 17,127.

The ministry urged the local authorities to boost epidemic monitoring and prevention measures to effectively guard against any further outbreaks of bird flu.

China has reported seven bird flu outbreaks among poultry so far this year. Six other outbreaks included one in the northwestern Xinjiang Uygur Autonomous Region, three in the southwestern Tibet Autonomous Region, one in the southwestern Guizhou Province and another in Guangdong Province.

The Ministry of Health reported this year three human bird flu cases, all in February, in the central Henan Province, southern Guangxi Zhuang Autonomous Region and Guangdong Province. All three people involved were dead.
 

JPD

Inactive
Officials fail to find source of Oxfordshire H7N7 avian flu virus

http://www.fwi.co.uk/Articles/2008/...ind-source-of-oxfordshire-h7n7-avian-flu.html

DEFRA has been unable to identify the source of the highly pathogenic H7N7 virus in the 4 June outbreak on a free range layer unit near Banbury, Oxfordshire.

In its final epidemiology report published today, DEFRA concluded that "the infection was confined to a single premise and there was no evidence of infection on any contact or geographically close premises, or evidence of spread of infection to any other premises to date."
Click Here

The two most likely sources of the outbreak are thought to be unidentified avian flu in a domestic flock in Great Britain, associated either by proximity or potential contact, or it came from wildlife.

Deputy chief veterinary officer, Alick Simmons, said: "This incident has demonstrated again the potential for avian flu to be introduced into domestic poultry in the UK. The risk of further incidents, while low, remains."
Click Here

He urged poultry keepers to maintain the highest standards of biosecurity and to report suspicion of disease promptly including where records indicate increased mortality or reduced performance."

Surveillance Zone and remaining disease control area restrictions were lifted earlier this week (Tuesday).
 

JPD

Inactive
PBS special to examine pandemic flu issues

http://cjonline.com/stories/071108/bre_flu.shtml

The Capital-Journal
Published Friday, July 11, 2008 at 11:02 a.m. CDT

State and county officials, including Maj. Gen. Tod Bunting, the adjutant general, will take part in a live television special on pandemic flu to be broadcast on Kansas public television stations Sunday
Print E-mail Comment

The one-hour program, “Kansas Homeland Security: Pandemic Flu,” is produced by KTWU Channel 11 in Topeka and will be seen on all PBS stations in Kansas starting at 5 p.m.

Video and live segments with public health and safety experts will focus on the history of pandemic flu, its effects, how it spreads, what can be done to prevent an outbreak in the state and what to do should an outbreak occur.

Bunting, who also serves as director of Kansas Homeland Security and the Kansas Division of Emergency Management, noted that the flu epidemic in 1918 killed more people worldwide than the number who died in World War I.

“There were three major flu outbreaks in the last century that killed more than 50 million people around the world,” he said. “We want to minimize the impact a pandemic can have by being as prepared as possible.”
 

JPD

Inactive
Report offers flu pandemic strategies for home health care providers

http://www.pandemicflu.gov/plan/healthcare/homehealth.html

The Agency for Healthcare Research and Quality has issued a report offering potential strategies to help home health care agencies prepare for a flu pandemic. The July 9 report emphasizes the potential for home health providers to help handle a surge in patients, and the need to involve them in local planning and coordination. It also explores the potential use of technology to monitor patients at a distance, the legal and ethical considerations of providing care under emergency conditions, and workforce issues such as training and the ability to report to work. The strategies and recommendations are based on key issues and challenges raised by an expert panel convened last summer.
 

JPD

Inactive
H5N1 Avian Flu Strain Shown to Infect Bovine Calves

http://www.ohsonline.com/articles/65333/

July 12, 2008

The H5N1 strain of avian influenza can infect bovine calves, at least after high-titer intranasal inoculation, and conventional tests may underestimate such infections, a team of German researchers reported in the July issue of CDC's Emerging Infectious Diseases journal. The team had experimentally inoculated a few calves with highly pathogenic H5N1 in a Biosafety Level 3+ animal facility to test bird-to-calf transmission and also calf-to-calf transmission. "Although the question whether calf-to-calf transmission of HPAIV (H5N1) occurs could not be definitely answered by our study, bird-to-calf transmission resulting in seroconversion is probable," they concluded. (Seroconversion is the development of antibodies in the blood in response to an infection.)

The study was funded by Germany's Federal Ministry of Food, Agriculture and Consumer Protection and conducted by Dr. Donata Kalthoff, a veterinarian at the Institute of Diagnostic Virology at FLI Insel Riems, and colleagues there. Her research interests are the pathogenesis of H5NI in bird and mammal species and vaccine development, according to the paper, which is available at www.cdc.gov/ncidod/eid/index.htm.

The authors said their data are the first to be reported to their knowledge on the susceptibility of cattle to infections with H5N1. The calves remained healthy throughout the study.
 

JPD

Inactive
Domestic Pigs Have Low Susceptibility to H5N1
Highly Pathogenic Avian Influenza Viruses

http://www.plospathogens.org/article/info:doi/10.1371/journal.ppat.1000102

Aleksandr S. Lipatov1¤, Yong Kuk Kwon1, Luciana V. Sarmento1, Kelly M. Lager2, Erica Spackman1, David L. Suarez1, David E. Swayne1*

1 Southeast Poultry Research Laboratory, Agricultural Research Service, United States Department of Agriculture, Athens, Georgia, United States of America2 National Animal Diseases Center, Agricultural Research Service, United States Department of Agriculture, Ames, Iowa, United States of America

Abstract

Genetic reassortment of H5N1 highly pathogenic avian influenza viruses (HPAI) with currently circulating human influenza A strains is one possibility that could lead to efficient human-to-human transmissibility. Domestic pigs which are susceptible to infection with both human and avian influenza A viruses are one of the natural hosts where such reassortment events could occur. Virological, histological and serological features of H5N1 virus infection in pigs were characterized in this study. Two- to three-week-old domestic piglets were intranasally inoculated with 106 EID50 of A/Vietnam/1203/04 (VN/04), A/chicken/Indonesia/7/03 (Ck/Indo/03), A/Whooper swan/Mongolia/244/05 (WS/Mong/05), and A/Muscovy duck/Vietnam/ 209/05 (MDk/VN/05) viruses. Swine H3N2 and H1N1 viruses were studied as a positive control for swine influenza virus infection.

The pathogenicity of the H5N1 HPAI viruses was also characterized in mouse and ferret animal models. Intranasal inoculation of pigs with H5N1 viruses or consumption of infected chicken meat did not result in severe disease. Mild weight loss was seen in pigs inoculated with WS/Mong/05, Ck/Indo/03 H5N1 and H1N1 swine influenza viruses. WS/Mong/05, Ck/Indo/03 and VN/04 viruses were detected in nasal swabs of inoculated pigs mainly on days 1 and 3. Titers of H5N1 viruses in nasal swabs were remarkably lower compared with those of swine influenza viruses.

Replication of all four H5N1 viruses in pigs was restricted to the respiratory tract, mainly to the lungs. Titers of H5N1 viruses in the lungs were lower than those of swine viruses. WS/Mong/05 virus was isolated from trachea and tonsils, and MDk/VN/05 virus was isolated from nasal turbinate of infected pigs. Histological examination revealed mild to moderate bronchiolitis and multifocal alveolitis in the lungs of pigs infected with H5N1 viruses, while infection with swine influenza viruses resulted in severe tracheobronchitis and bronchointerstitial pneumonia. Pigs had low susceptibility to infection with H5N1 HPAI viruses.

Inoculation of pigs with H5N1 viruses resulted in asymptomatic to mild symptomatic infection restricted to the respiratory tract and tonsils in contrast to mouse and ferrets animal models, where some of the viruses studied were highly pathogenic and replicated systemically.
Author Summary

Highly pathogenic avian influenza A viruses of H5N1 subtype have spread through Eurasia and Africa with continuing cases of human infection, suggesting the potential to become a pandemic influenza virus.

Pigs which are susceptible to infection with both human and avian influenza A viruses are one of the natural hosts where a pandemic virus could be produced. In this study, we characterized in a pig model the infection caused by four H5N1 virus strains isolated from humans, poultry and wild birds. We demonstrated that exposure of pigs through the nose with H5N1 viruses or consumption of meat from infected chickens resulted in infection with mild weight loss. In contrast to mouse and ferret animal models where some of viruses were highly pathogenic and replicated in multiple organs, replication of H5N1 viruses in pigs was restricted to the respiratory tract, mainly to the lungs, and tonsils. Mild to moderate bronchiolitis and pneumonia were observed in the lungs of infected animals.

Our results demonstrated that domestic pigs had low susceptibility to infection and disease with highly pathogenic H5N1 influenza A viruses.
 

JPD

Inactive
H274Y Tamiflu Resistance Explodes in Tottori Japan

http://www.recombinomics.com/News/07110802/H274Y_Concurrent_Tottori.html

Recombinomics Commentary 22:15
July 11, 2008

According to the preliminary report from a local health laboratory, oseltamivir resistance prevalence have been dramatically increasing in Tottori prefecture located at west of the main island of Japan (30% of total isolates in the prefecture, analysis in detail is ongoing).

The above comments are from Japan’s recent update on H274Y in H1N1 seasonal flu. Although overall, the incidence of H274Y in H1N1 isolates was only 1.6%, as noted above the Tamiflu resistance frequency is exploding in Tottori. In addition to a description of many of the resistant cases, the report has an NA phylogenetic tree of the isolates from Japan along with several of the public sequences from the United States and England.

The largest group outside of Japan is listed as “Northern EU-like” and this version of H5N1 has also reached Japan (in isoaltes from Yokohama). However, the tree has four of the isolates from Tottori, which map onto two branches which are distinct from the large branch which also has isolates from the United States, France, and England.

One of the branches with 2008 Tottori isolates (numbers 28 and 29) also has A/Washington/28/07, which is a public sequences that is closely related to other isolates from the state of Washington (33, 34, and 40). None of these four closely related isolates from the state of Washington have H274Y, but both isolates from Tottori do, indicating the H274Y was acquired after this set of isolates formed a separate branch. Thus, the acquisition of H274Y by these two Tottori isolates was independent of the isolates in the larger “Northern EU” group.

Similarly, the other two Tottori isolates (numbers 23 and 21) fall onto another branch which include other public sequences from the United States. The upper portion of this branch include two H274Y isolates from Hawaii (21 and 28), but the upper branch has other isolates that do not have H274Y, as seen in the tree from Japan (Hawaii/31/07 and Miyagi23/08). Other public sequences also map to the upper portion of this branch (Hawaii/35/07, Hawaii/18/07, California/28/07), indicating the two positives from Hawaii are distinct from the positives listed above.

Moreover, on the lower portion of the branch, which has the two isolates from Tottori, are other isolates from Japan that are negative for H274Y (Shiman/7/08, Yamaguchi/14/08, Kyoto-C/1/08) along with two isolates that are positive (Gifu-C/17/08 and Gifu-C/38/08), indicating these isolates are also due to introductions that are independent of the isolates above.

The acquisition of the same polymorphisms onto different genetic backgrounds circulating in the same geographical area is similar to H5N1 data for poultry in the Nile Delta. In those cases distinct genetic backgrounds acquired the same change (G743A) at the same time, which was supported by related sequences which did not acquire the change. Thus, the same change among a small number of acquistions cannopt be easily explained by a "random mutation" mechanism.

Attempts to explain these acquisitions via the current basic tenet from influenza drift, selection of random mutations, is difficult. The H5N1 examples involved a synonymous change. Similarly the sudden appearance of H274Y has appeared on multiple genetic backgrounds in patients who were not taking Tamiflu.

Consequently, influenza “experts” have been startled by the sudden appearance of Tamilu throughout the world on multiple Brisbane/59 genetic backgrounds. However, these acquisitions are readily explained by recombination between closely related sequences, such as those defined above.

These concurrent acquisitions of single nucleotide polymorphisms continue to raise serious doubt about the roll of de novo mutations in the creation of antigenic or genetic drift.
 

JPD

Inactive
CDC lab containing deadly virus suffers power outage

http://www.ajc.com/news/content/metro/dekalb/stories/2008/07/12/cdc_power_outage.html

By ALISON YOUNG
The Atlanta Journal-Constitution
Published on: 07/12/08

A laboratory building that contains a deadly strain of avian flu and other germs is among four that lost power for more than an hour Friday when a backup generator system failed again at the Centers for Disease Control and Prevention.

The outage affected air flow systems in labs that help contain such germs as the H5N1 flu virus, which some experts fear could cause a pandemic. But there were no exposures to infectious agents, and neither workers nor the public were at any risk, said CDC spokesman Tom Skinner.

The outage is the latest in a string of mechanical and construction incidents at labs on the agency's Clifton Road campus — many in new buildings that are part of a $1 billion construction plan.

Last summer, an hour-long power outage at a different CDC lab tower, called Building 18, resulted in a congressional hearing. The Government Accountability Office, the investigative arm of Congress, is still examining safety at CDC's high-containment laboratories and concerns raised years ago by agency engineers that CDC's backup power system was likely to fail.

"It's important for people to understand that even though we lose power to these facilities from time to time, worker safety and the public's safety is not in jeopardy because multiple, redundant systems are in place, separate from those that rely on power," Skinner said Saturday.

Around 5:40 p.m. Friday, a Georgia Power transformer failed, cutting off electricity to part of the CDC campus. CDC's backup generators initially came on, Skinner said. But then the system detected some sort of power anomaly and shut itself off, cutting off backup power to three buildings, he said.

The buildings affected were:

• Building 17, a newer infectious disease research lab building, where scientists work with rabies, HIV, influenza and tuberculosis, including extensively drug-resistant strains. The building has Biosafety Level 3 (BSL-3) labs, which need electricity to maintain negative airflow. This key safeguard helps contain germs by making sure air is always being drawn into the lab and through special HEPA filters before leaving the building. When power is lost, the lab has neutral air that neither flows in or out.

• Building 20, a newer office building that also houses the agency's fitness center.

• Building 1 and Building 3, antiquated attached office buildings from about 1959.

Information about whether any labs were in use at the time of the outage was not immediately available Saturday, Skinner said.

"This happened late in the day and there were not many employees still in the buildings," Skinner said. "Those in the buildings evacuated without incident."

The power was out for about 1 hour 15 minutes, Skinner said, and was restored when Georgia Power fixed the transformer problem.

A bird caused the blown Georgia Power transformer, said power company spokesman Jeff Wilson.

CDC officials did not attempt to override and restart the agency's backup generators because they didn't know what the anomaly was that shut them down, Skinner said.

Skinner also said there was no power disruption at Building 18, the $214 million Emerging Infectious Diseases Laboratory that suffered the hour-long outage last summer.

The AJC reported last summer that government construction engineers had warned since 2001 that CDC's planned design for its centralized backup power generation system would not keep crucial lab systems from failing in an outage.

"I've been saying this for over three years now, but having the generators in this configuration gives us no protection whatsoever from many types of failures," CDC mechanical engineer Johnnie West wrote in an August 2003 e-mail to agency officials, one of several reviewed by the AJC.

CDC officials have said that despite West's concerns, the consensus of experts was that a centralized generator farm was better than having individual units at buildings.

Skinner emphasized that the CDC has many other physical barriers to contain germs that don't require electricity. They include safety cabinets and layers of rooms, filters and corridors between the germs and the outdoors.

"I think people need to know we're talking about an enormous campus with complex systems, and we're never going to be able to fully eliminate power outages," Skinner said. "That's impossible. The key for us is to minimize the duration of the outage."
 

JPD

Inactive
US bans fowl imports due to bird flu

http://www.dominicantoday.com/dr/world/2008/7/12/28637/US-bans-fowl-imports-due-to-bird-flu



Washington.– The US Department of Agriculture (DA) has temporarily banned the entry of all imports of domestic and wild birds, along with poultry and related produce from the US state of Arkansas, Haiti and the UK following official confirmation by animal health authorities of avian influenza (AI) or bird flu virus in these areas.

The ban covers all domestic and wild birds and their products, including day-old chicks and eggs.

Agriculture Secretary Arthur Yap said the ban and other emergency measures are necessary to protect human health and the P60-billion poultry industry in the Philippines, which has remained free of bird flu ever since the H5N1 strain of the virus first resurfaced in Asia in 2003.

The Philippines remains one of only three AI-free countries in Southeast Asia. The two others are Brunei and Singapore.

Yap issued the ban after the Office International des Epizooties (OIE) or the World Animal Health Organization confirmed that low pathogenic AI has been detected in a poultry farm in Arkansas , Washington county affecting broiler chickens.

The OIE based its declaration on a report submitted by Dr. Stan Bruntz, the epidemiologist of the US National Surveillance Unit. Dr. Nigel Gibbens, UK’s chief veterinary officer, meanwhile reported the occurrence of highly pathogenic AI in a poultry farm in Shenington, Oxfordshire, England.

Separately, Max Millien, the director of the Haitian Ministry of Agriculture, informed the OIE of the presence of a low pathogenic strain of the disease in poultry, turkey and fighting cocks in Centre, Carca La Source, Nord, Cap Haitian and Sud, Miragoane in Haiti.
 

JPD

Inactive
Planning for Pandemic Flu

http://www.kpvi.com/Global/story.asp?S=8663589

When pandemic flu hits the United States, experts say it will exhaust all of our resources. Hospitals will struggle, businesses will slow down, and the work force will be cut in half. That's why local health officials want to make sure we're prepared at all times.

The Southeastern District Health Department has dedicated the whole month of July to prepare for a possible outbreak of pandemic flu. Officials with the district say pandemic flu can strike at anytime, so it's important that we know what exactly what to do.

This month they will take a look at the worst-case scenario, and use that scenario to set up alternate care locations and prepare staff.

Darin Letzring, Southeastern District Health Department: "All experts say it's not a matter of if, but when. So that's why it's important for us to be prepared at all times."

Denise O'Farrell, Southeastern District Health Department: "With this upcoming exercise we will be working with four or five hospitals because they have indicated to us that they will be so busy that they won't be able to operate an overflow site."

Next week the health district will have an interactive blog available for people to ask questions about pandemic flu. Check it out at www.sdhdtraining.wordpress.com.
 

happyretiree

Veteran Member
CDC lab containing deadly virus suffers power outage

Thanks for your hard work JPD. A lot of good information and links. I appreciate what you do.
 

JPD

Inactive
Evolution of H274Y Tamiflu Resistance Baffles Experts

http://www.recombinomics.com/News/07130802/H274Y_Evolution.html

Recombinomics Commentary 23:55
July 13, 2008

The preliminary analysis suggests that the resistant mutants do not share a single origin and further genotypic analysis is ongoing.

The above comment from the WHO update entitled "Influenza A (H1N1) virus resistance to oseltamivir" is confirmed by a multitude of phylogenetic trees of recent H1N1 isolates from a number of countries, which can be analyzed in conjunction with public sequences. These sequences contain H274Y, which confers Tamiflu resistance. The sudden appearance of Tamiflu resistance in seasonal flu linked to independent introductions of H274Y into populations that rarely use Tamiflu has startled and baffled influenza “experts” who expect such antigenic drift to be linked to selection of random mutations. However, the explosion of Tamiflu resistance in seasonal flu is just one of many surprises associated with this change, which is chronicled below.

H274Y gained considerable attention when it appeared in Tamiflu treated H5N1 patients in Vietnam in 2005. H5N1 was linked to an explosion of human cases in Vietnam and Thailand in 2004 and the H5N1 was classified as clade 1, in contrast to clade 2 H5N1 in birds which had emerged in China and multiple countries to the east of China. Clade 1 was a concern because it was quite different from the earlier H5N1 outbreaks in humans and stockpiled vaccines were a poor match. Moreover, all clade 1 isolates had two amantadine resistance markers in the M2 protein, so the only anti-virals of choice with the neuraminidase inhibitors. However, Relenza was not available in quantity, so the drug of choice was Tamiflu (osletamivir).

However, earlier data on use of Tamiflu against the nine neuraminidase serotypes indicate N1 was one of the serotypes with the highest level of resistance. Moreover, inhibition testing of H5N1 from Vietnam required an even higher level of Tamiflu to achieve a 50% marker, indicating treatment dose levels were near the limits of efficacy. Use was compromised further because Tamiflu was most effective when administered with 48 hours of disease onset, and in most cases treatment would begin many days after disease onset because H5N1 infections initial present with many of the same symptoms as seasonal flu, which is not traditionally treated with anti-virals in southeast Asia.

However, Tamiflu was the only real anti-viral choice, so it was used to treat and prevent H5N1. The prophylactic dose was half of the treatment dose, raising additional concerns of resistance due to sub-optimal treatment, but its use was implemented in a plan to blanket H5N1 regions with Tamilfu, to blunt and initial human transmission.

In 2005, Tamiflu resistance was identified in H5N1 patients being treated with Tamiflu, as well as one contact who was receiving a prophylactic dose because her brother was hospitalized and H5N1 positive. H274Y was identified in patients being treated as well as the patient being treated initially with a prophylactic dose. Moreover, the prophylactic patient had H5N1 with a second Tamiflu resistance change N294S. Moreover, H274Y was also detected in a member of the Karo cluster in Indonesia who had prematurely stopped taking Tamiflu. In Indonesia, the H5N1 was clade 2.1.

However, assurances were given that the resistance markers, especially H274Y, was associated with a fitness penalty, so although the resistance would cause problems in infected patients, it would only be viable in patients that were being treated with Tamiflu, because H274Y would reduce the ability of H5N1 to compete with wild type H5N1. However, the fitness penalty was previously reported in seasonal flu, and the applicability to H5N1 was unclear.

There were several pieces of data that raised concerns about assurances based on a fitness penalty. Both H274Y and N294S had been previously been reported in poultry suggesting that H5N1 with either mutation could compete with wild type H5N1. Additional concerns were linked to a cluster of H5N1 cases in Egypt, which had N294S in samples collected prior to Tamiflu treatment. Moreover, H274Y was detected in wild bird isolates in Astrakhan, raising additional doubts about a fitness penalty. The H5N1 in the above instances was clade 2.2 extending the number of different H5N1 clades and sub-clades with H274Y or N294S.

Concerns that the Tamiflu resistance could be acquired by seasonal flu began shortly thereafter in the 2006/2007 season, when five N1 sequences with H274Y became public. All five H1N1 infected patients were from the United States, but these five sequences represented less than 1% of N1 sequences that season, so the significance was unclear, although H274Y was not reported for any prior human H1N1 public sequence.

Concerns grew markedly the followings season, when Norway reported that more than half of the H1N1 infections contained H274Y. These concerns increased when H1N1 sequences from the United States were released. Approximately 30% of the Brisbane/59 (clade 2B) had H274Y, and there were at least independent introductions. Recently phylogenetic trees identify an number of additional introductions in isolates from patients in Japan which had not been treated with Tamiflu prior to sample collection. The data from other countries indicated the H274Y was concentrated in clade 2B, and the frequencies were increasing in multiple countries.

This global spread of H274Y through introductions onto multiple gentic backgrounds indicated the H274Y was not spreading via selection of random mutations, but instead was being acquired by homologous recombination as was previously described for G743A in H5N1.

The data support the concurrent acquisition of the same polymorphism onto multiple genetic backgrounds and suggest Tamiflu will have limited utility in the treatment of prevention a pandemic linked to efficient transmission of H5N1.
 

JPD

Inactive
The long war against flu

http://www.nature.com/nature/journal/v454/n7201/full/454137a.html

That the H5N1 strain of bird flu has not yet caused a pandemic is no cause for complacency. Preparations for the inevitable must be redoubled to mitigate the potential devastation.

Five years after the deadly H5N1 avian influenza virus exploded into a global epidemic in birds, it has infected more than 300 people. Happily, it has not yet evolved into a strain that can transmit easily between humans — an event that would trigger a pandemic that could kill tens of millions. But as long as H5N1 continues to be present in animals, that risk persists. And with so many other flu strains out in the world, all constantly evolving, a flu pandemic is inevitable.

This grim reality has spurred basic research into topics such as the 1918 flu virus, cell-receptor biology and evolutionary dynamics, which are collectively yielding insights into the molecular basis of virulence and how viruses adapt to humans. Researchers have also begun to unravel the often fatal clinical events caused by the virus, such as the massive immune response that is a 'cytokine storm', and cell-culture technology is promising to make vaccines available more quickly. Plans by the Bill & Melinda Gates Foundation, the Wellcome Trust and the Pasteur Institute to roadmap this research should help focus priorities for funding, just as similar work has done for neglected diseases.

But improved control measures, especially for H5N1 itself, and public-health infrastructure are our frontline defences against a pandemic. Unfortunately, the overall control picture is bleak. Thailand, Vietnam and China have notched up successes in curbing outbreaks in birds, which is key to minimizing the chance that the virus can pass to humans. But South Korea had its worst outbreak ever in April, and the disease has become endemic in Indonesia, Bangladesh, Vietnam and Egypt. Eradication now seems impossible, and the task of containing the virus has become chronic and costly.

Many countries have made patchy progress in planning how to mitigate a pandemic once it does break out. True, any such plan can only buy time, by using antiviral drugs and restricting movement, until a vaccine is available for the specific strain that has broken out. The Commentary on page 162 endorses what might be an intriguing adjunct: 'pre-pandemic' vaccines, which would be matched not to the exact pandemic strain, but to earlier variants. Even if these vaccines were only partly effective, advocates argue, they might confer sufficient protection to prevent death or severe disease. Although this idea is untested, it merits consideration — especially as strain-specific vaccines would be available only several months into the pandemic, and even then would be in very short supply. The World Health Organization is planning to stockpile more than 100 million doses of pre-pandemic vaccines, and some nations, including Japan, are considering the same.

Even if H5N1 never evolves into a pandemic strain, it serves as a useful wake-up call.

But delivering sufficient perfectly matched pandemic vaccine fast enough to make a difference is the critical issue. One promising approach — equipping vaccines with adjuvants that boost their effect, reducing the amount of antigen needed in each dose — is belatedly getting the attention it deserves. Indeed, research is generating vaccine formulations that need so little antigen that timely doses could, in principle, be provided for everyone on Earth using existing plant capacity.

Rapid delivery will require an unprecedented level of international coordination. Plans should be in place so that when a pandemic strikes clinical trials of the strain-specific vaccine begin — as do the manufacture and distribution of the billions of syringes needed to deliver it. There should also be international mechanisms to ensure that developing countries have access to pandemic and pre-pandemic vaccines at low cost.

Surveillance, control of disease in animals, pandemic planning and vaccines — each requires intense, organized and sustained commitment. Even if H5N1 never evolves into a pandemic strain, it serves as a useful wake-up call, revealing just how much more must be done to be better prepared for the inevitable.
 

JPD

Inactive
Another H5N1 Confirmed Fatality in Tangerang Indonesia

http://www.recombinomics.com/News/07130801/H5N1_Tangerang_IHR.html\

Recombinomics Commentary 19:34
July 13, 2008

A resident Belendung, Kecamatan Benda, of Kota Tangerang, Banten, the USA (37) that died last July 10 was stated positive terjangkit the virus of kind bird flu H5N1.

The executive the Task of the Sub Dinas Pemberantasan Head and the Prevention of the Illness and Lingkungan Sanitation (P2PL) the Kesehatan Service of the Tangerang City, Ati Pramudji Hastuti, on Sunday (13/7), said results of the blood inspection by the Departemen Laboratory of the Health showed that the USA died because positive was infected by the bird flu virus.

The USA that lived in Street Kyai the Pilgrim Kuding RT 04/07 the Blendung Village, the Object, Tangerang, that blew out the last breath in the Public Hospital (RSU) Tangerang (10/7).

Before dying, the USA experienced was sick with the condition for the high fever, the difficult cough, and breathless since Monday (5/7),

The above translation described another lab confirmed H5N1 case in Tangerang. This should be reported to WHO within 24-48 hours per IHR requirements.

WHO generally issues a situation update shortly after receiving confirmation from the affected country.

Failure to publish a situation update from Indonesia this week will be cause for concern.
 

JPD

Inactive
S'pore, Indonesia enhance collaboration to fight bird flu

http://www.channelnewsasia.com/stories/singaporelocalnews/view/360482/1/.html

JAKARTA: Singapore is exploring ways to further enhance its collaboration with neighbouring country, Indonesia, to fight against bird flu.

Together with the United States, they have implemented a pilot project in Tangerang – a district just outside Jakarta – to carry out surveillance and measures to control the disease which has killed more than 110 Indonesians.

On Tuesday, Dr Balaji Sadasivan, Singapore's Senior Minister of State for Foreign Affairs, visited the project site which is considered the epicentre of bird flu in Indonesia. Almost all of the 25 residents there died after being infected by the virus.

"This pilot project is really to try to find out the nature of the disease, how it is spread, what the symptoms are and how best it can be controlled," said Dr Balaji.

Costing US$4.5 million, the three-year pilot project looks at the whole chain of bird flu infection – from the traditional market where fowls are sold, to the hospitals where humans are diagnosed and treated.

Public health education in schools and villages are also being conducted.

Dr Balaji said: "I'm very happy with the work they're doing here. There are conscientious doctors here... they are collecting data which I think is useful and very important to the world."

Despite the intensive efforts over the past year, the district continues to see residents infected by the bird flu virus.

Local authorities are planning to relocate a number of slaughtering houses and traditional markets.
 

JPD

Inactive
Vietnam reports bird flu-hit chicken in southern province

http://news.xinhuanet.com/english/2008-07/16/content_8554622.htm

HANOI, July 16 (Xinhua) -- Specimens from dead chickens in Vietnam's southern Long An province have been tested positive to bird flu virus strain H5N1, according to local newspaper Youth on Wednesday.

Tests by Vietnam's Regional Animal Health Center No. 6 have shown that some chickens of a 3,000-fowl flock raised by a household in Can Duoc district were infected with bird flu, the newspaper quoted Duong Minh Phi, deputy head of the province's Veterinary Bureau, as saying.

Chickens in the flock started to die 10 days ago after developing bird flu symptoms, he said.

The Department of Animal Health under the Vietnamese Ministry of Agriculture and Rural Development has yet to confirm the bird flu outbreak in Long An. Now, only southern Tra Vinh province is being hit by the disease, the department said.

Bird flu outbreaks in Vietnam, starting in December 2003, have killed and led to the forced culling of dozens of millions of fowls in the country.
 

JPD

Inactive
Indonesia details reasons for withholding H5N1 viruses

http://www.cidrap.umn.edu//cidrap/content/influenza/panflu/news/jul1508supari.html

Robert Roos * News Editor

Jul 15, 2008 (CIDRAP News) – In a recent medical journal article, Indonesian officials detailed the rationale for their refusal to share H5N1 influenza virus samples with the World Health Organization (WHO), asserting that it was in part a response to violations of the WHO's own guidelines by scientists and laboratories.

A key part of the Indonesian argument is that the WHO issued a statement in March 2005 that its reference labs should not distribute biological specimens to other organizations without permission from the country that supplied them. The report also maintains that withholding the viruses is not a violation of the International Health Regulations (IHR).

The report, authored by four Indonesian scientists and officials, including Health Minister Siti Fadilah Supari, was published in the June issue of Annals Academy of Medicine Singapore.

The article gives the Indonesian version of the sequence of events leading to the government's decision in January 2007 to stop sending H5N1 viruses to the WHO's reference labs. The essential reason was, and remains, the concern that samples provided freely by developing countries are used by companies in wealthy countries to develop vaccines and other products that the developing countries can't afford. Indonesia wants a guarantee that it will share in the benefits derived from the isolates it provides.

"If the world continues to operate in this way, the discrepancies will become wider and wider," the article says. "The poor will become poorer and the richer become richer. It is the responsibility of all nations to change this situation."

Because scientists need H5N1 isolates to track the virus's evolution, develop vaccines and diagnostics, and monitor drug resistance, Indonesia's action generated international concern. The move disrupted a 50-year-old tradition of free sharing of influenza viruses through the WHO.

WHO officials declined to comment specifically on the Indonesian report, noting that a series of international meetings to resolve the virus-sharing issue is continuing.

"In the meantime, individual countries like Indonesia are free to try and influence other countries," WHO spokeswoman Sari Setiogi told CIDRAP News by e-mail. "As secretariat, the WHO is more of a referee in this process but is fully supportive of an approach that is feasible, transparent and equitable and that will continue to provide protection and security for all countries."

The Indonesian report also includes a profile of the human H5N1 cases in Indonesia through the end of 2007, noting, among other things, that about a quarter of the 116 cases occurred in 10 clusters of blood relatives.

What led to a 'drastic decision'
Indonesia's first human H5N1 cases were identified in July 2005. From then until the end of 2006, the government sent all clinical specimens to two labs in the WHO's influenza surveillance network (the US Centers for Disease Control and Prevention [CDC] and Hong Kong University) for confirmation and risk assessment, the report says. In January 2007 the government made the "drastic decision" to withhold the specimens.

Incidents that offended Indonesia began in April 2006, the report says. Scientists at international meetings started reporting results of analyses of H5N1 viruses from Indonesia, without first getting permission from, or even notifying, Indonesia. In other cases, foreign scientists who studied Indonesian viruses sent to the WHO offered to include Indonesian experts and officials as coauthors, but only "at a very late stage of the manuscript writing," according to the journal article.

These "unethical practices" contravened the WHO guidance issued in March 2005 concerning the timely sharing of viruses with pandemic potential, the article says.

This guidance, according to the report, states, "The designated WHO Reference Laboratories will seek permission from the originating country/laboratory to coauthor and/or publish results obtained from the analyses of relevant viruses/samples." It also says, "There will be no further distribution of viruses/specimens outside the network of WHO Reference Laboratories without permission from the originating country/laboratory."

The source listed for the guidance is an online document that was accessed in March 2007 but, as the footnote says, is no longer available online. (The url listed for the document elicits only the message "This page is not available in English.")

Another episode that played a role was the emergence in May 2006 of Indonesia's largest H5N1 case cluster—one probable and seven confirmed cases, all in blood relatives, seven of them fatal. The cluster raised fears that a pandemic was beginning. One result was that Indonesia was criticized for releasing genetic data only to a small network of researchers linked to the WHO and the CDC, the Indonesian authors wrote.

In response to this "unfair" criticism, Indonesia decided that all its H5N1 virus sequence data at the CDC and Hong Kong University should be deposited in GenBank, a public database. But at the same time, the government decided to let its own labs confirm human H5N1 cases and not send samples to WHO labs for case confirmation anymore. However, officials elected to continue sending samples to the CDC for risk assessment and generation of seed viruses for vaccine production, the report explains.

Australian company's plan was pivotal
Then in late 2006 a journalist confirmed to Indonesian officials that an Australian company planned to develop an H5N1 vaccine from a virus that Indonesia had provided to the WHO network. This plan, the article says, "was not only in violation (again) of the WHO guidance for virus sharing (March 2005) but also . . . revealed the unfairness and inequities of the global system."

The Indonesian authors maintain that their policy is not a violation of the International Health Regulations (IHR) as revised in 2005. The regulations do not "literally or specifically" require countries to share biological samples related to potential public health emergencies, they argue. In their view, the IHR can be interpreted as requiring only the sharing of public health information, not biological materials.

Their interpretation also holds that countries have "sovereign control" over their biological resources, in keeping with the Convention on Biological Diversity, an international treaty adopted in 1992. "Hence, countries have the right and authority to decide whether to share their specimens with the WHO system or not, depending on their own judgment," the report says.

The report also traces the series of meetings convened by the WHO to try to resolve the virus-sharing issue. At a major meeting in November 2007, participants failed to reach a solution. But according to the Indonesian authors, the meeting brought an acknowledgement of a "breakdown of trust" in the global flu surveillance system and thereby "laid the foundation for a fundamental and significant change to the existing system."
 

JPD

Inactive
Indonesia's unofficial death toll from bird flu climbs to 111

http://hosted.ap.org/dynamic/storie...ME&TEMPLATE=DEFAULT&CTIME=2008-07-17-05-15-17

By IRWAN FIRDAUS
Associated Press Writer

BELENDUNG, Indonesia (AP) -- Relatives say a 38-year-old man has died of bird flu, raising the unofficial toll in the world's hardest hit nation to 111.

The government recently started delaying announcements about bird flu fatalities, sometimes by several weeks. But health workers speaking on condition of anonymity confirmed the tests came back positive.

Abdul Kadir said Thursday his brother-in-law, Asnawi Sandri, died on July 10. He had symptoms of the disease, including high fever and coughing, when he was hospitalized.

Kadir says doctors told the family the father of two died of bird flu.
 

JPD

Inactive
Vaccinated chickens in Vietnam die of bird flu

http://www.monstersandcritics.com/n...accinated_chickens_in_Vietnam_die_of_bird_flu

Hanoi - Hundreds of chickens at a poultry farm in southern Vietnam died of avian influenza even though the owner of the farm reported the birds were vaccinated against the disease, an official said Thursday.

Several hundred of the 3,000 chickens died at a farm in Tan Lan commune in the Long An province, 50 kilometres west of Ho Chi Minh City, since late June. Last week they were tested positive for the H5N1 avian influenza virus, said Dinh Van The, head of the province's Animal Health Department.

The owner of the farm reported to the department that all the birds in the farm had been vaccinated against bird flu, he said.

'We suspect that the owner of the farm was not honest in his report, or the vaccine used at the farm was of bad quality,' The said. 'We are investigating the case.'

H5N1 mainly affects poultry and wild birds, but can infect humans who have close contact with sick fowl. Scientists fear if it spreads unchecked, the disease could mutate into a form that could be transmitted between humans, leading to a worldwide pandemic with the potential to kill millions.

Bird flu killed five people in Vietnam since the beginning of this year, raising the bird flu death toll in the country to 52 since H5N1 first appeared in the country in late 2003.
 
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