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World Issues

Enviro. Aug. 18 '05 Avian Flu Due

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#1 of 5

     Posted 8/20/05 9:27 PM   
Sue N
 
From  Sue N  Posts 1550  Last 10/30/08
To  John Linendoll      [Msg # 110846.1 ]    (Unread)

What chance do you see of avoiding a major flu pandemic?

Avian Flu Pandemic Due

The World Health Organization (WHO) has been warning us about avian or bird flu for some time. The disease has been discovered in Cambodia, China, Hong Kong, Indonesia, Japan, Kazakhstan, the Republic of Korea, Malaysia, Mongolia (to be confirmed), Philippines , Russia (from Siberia westwards), Thailand, Tibet, and Viet Nam. It has also been suspected in Laos and Myanmar. The variant causing concern is called H5N1. Some outbreaks have been brought under control, others have not.

It simply is not feasible to eradicate avian influenza in wild birds as a whole, although attempts are made to nip some localised outbreaks in the bud. As with humans, birds can get sick and recover, and only occasionally does a large enough percentage of the population die of the flu to set off alarm bells. The recent mass death of birds at Qinghai Lake in central China was unusual. One way that the avian flu is passed between birds, whether domesticated or wild, is through water. The Netherlands plans to protect its domestic flocks by keeping them indoors.

So far, very few cases of avian flu in humans have been passed from human to human. In most cases the victims have had contact with poultry, and in Asia, where the outbreaks currently are, many people keep birds and live in close proximity to them. However, these kinds of viruses readily swap genes, and all it needs is for a virus that passes easily from human to human to swap genes with a virus in the same bird that is fatal to humans - but not so rapidly fatal that it does not get the chance to spread - and the world could see a major pandemic.

So, it is rather like Russian Roulette, a "game" where just one bullet is put into a revolver and a number of people in turn spin the cylinder then point the gun at their own heads and pull the trigger. The trigger has been pulled once already, as wild birds from currently-infected regions have begun to migrate. Perhaps there will be a few more outbreaks of current variants of the virus, perhaps a few domesticated birds and even people will die, and perhaps the outbreaks among domestic birds will be contained. Or maybe this will be the time when the new variant that scientists fear arises. If it does, perhaps it will happen somewhere where it can rapidly be contained, and perhaps it won't. In the meantime, birds will mingle with others which spent the summer in a different place to them, giving the virus more opportunities to spread and mutate. Assuming we escape the worst this winter (or summer if you are on the other side of the world to me), then the trigger will be pulled again in the spring (or autumn), when the birds migrate again, taking their newly-acquired viruses to new places. And so on. Many scientists believe it is a matter of when the bullet (a pandemic) strikes, and not whether.

Please see the following message for the rest of this story and other stories.

Sue [sysop in NewsForum, World Issues, All Animals forums]
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#2 of 5

     Posted 8/20/05 9:28 PM   
Sue N
 
From  Sue N  Posts 1550  Last 10/30/08
To  All      [Msg # 110846.2 Message 110846.2 replying to 110846.1 110846.1 ]    

If they are right, then how well prepared are we? This could be a lottery. As already mentioned, people in Asia are more likely to catch it from birds, so authorities may be dealing with a number of simultaneous cases spread over quite a wide area rather than just a few, making quarantining much harder. Some countries are in a position to be more vigilant than others. Some have better education and better health care than others. At present we have no vaccine that will work against all the different variants of bird flu. In developed countries, we immunise key and vulnerable people with a mixture of 3 vaccines aimed at the 3 variants considered most likely to strike that season. If an inoculated person gets infected with a fourth variant, tough.

Perhaps 50 million people (estimates vary) died of an earlier variant of the flu, H1N1, in 1918; at least 2.7% of the world population at the time. For comparison, around 276,000 died in the December 26 2005 tsunami. Our current population is about 3.5 times what it was in 1918. If a similar percentage were to be affected now, then all other things being equal, around 175 million people would die. Of course, some of us have better health care now, but we are also more crowded, we are more reliant on other people going to work to provide us with everything we need, and viruses can spread around quickly in airplanes. SARS showed us this in 2003, spreading to 25 other countries from Southern China.

Scientists are busy modelling how they think the pandemic will spread, and how many people might be affected. Many models assume that a quarter of the population would become infected in the first wave. One group estimates that half a million people could die in the USA of a moderately severe strain (i.e. milder than in 1918), with more than 2.3 million hospitalized. A British model estimates that 50 million people could die worldwide.

There is an anti-viral agent brand-named Tamiflu which can help, but there are nowhere near enough stocks for everyone, or even for those most at risk. Already about 1% of flu strains are resistant to it and to other products like it. Tamiflu proved effective against H7N7 avian flu in the Netherlands in 2003. Last year the USA did not have adequate stocks of flu vaccine at the beginning of the season because of a problem at a single vaccine-producing plant. The world is just not ready to speedily mass-produce vaccines as required, to keep up with the mutations. The World Health Organization and many countries (those that can afford it) are scrambling to reserve stocks of Tamiflu, which is produced at just one plant. We can only hope that the WHO manages to acquire enough doses to nip any outbreaks in the bud in time, particularly since the disease is likely to hit the hardest in countries which cannot afford expensive medicines.

Britain is buying 14.6 million courses - 7.3 million doses by next April and the rest later, in 2006-7. This will be enough to treat a quarter of the population, if the pandemic holds off until then. After that, there may be a tailor-made vaccine available - current vaccines would be of no use. It would take 4 to 6 month to design a virus for the specific strain, and further time to manufacture doses for the world. Norway has an order in for 1.2 million doses to treat third of the population, and Sweden will be able to treat 10%. Thailand, Hong Kong, France, New Zealand, Sweden and Canada also have substantial orders in. Thailand is considering making its own generic version.

The USA is believed to have ordered 5.3 million courses of Tamiflu, enough for between 1 and 2 percent of the population. It would need over 70 million doses to treat a quarter of the population (estimated at 295,734,134 in July 2005), which is what the WHO recommends. The USA does have enough to treat its people in embassies in southeast Asia. The WHO has stockpiled enough for 30 percent of its employees.

President Bush has taken a book about the 1918 flu pandemic to Texas to read on his holiday. In it the author, John Barry, contends that the U.S. government ignored that crisis and allowed it to thrive. According to Senate majority leader Bill Frist (R-Tenn.) at a speech at Harvard early in June, the current administration is ignoring this crisis too, judging by the Tamiflu stockpile situation. Perhaps the U.S. will join the queue for more Tamiflu when the President returns from holiday. New kinds of vaccines are being researched, but it could be years before they are proven and are on the market in any quantity.

There are many who say that the USA, or even the whole world, has left it too late. They could be right. What do you think?

Please see the following message for the remaining stories.

Sue [sysop in NewsForum, World Issues, All Animals forums]
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#3 of 5

     Posted 8/20/05 9:31 PM   
Sue N
 
From  Sue N  Posts 1550  Last 10/30/08
To  All      [Msg # 110846.3 Message 110846.3 replying to 110846.2 110846.2 ]    

Recent news stories involving bird flu include:

Please see the following message for the remaining stories.

Sue [sysop in NewsForum, World Issues, All Animals forums]
 OptionsReply to this Message Reply

#4 of 5

     Posted 8/20/05 9:32 PM   
Sue N
 
From  Sue N  Posts 1550  Last 10/30/08
To  All      [Msg # 110846.4 Message 110846.4 replying to 110846.3 110846.3 ]    

More news stories involving bird flu include:

Other stories

Testing Options for Mad Cow Said Limited

The Agriculture Department has posted details of its testing for mad cow disease on its website. In 9,200 cases only one kind of test was used, the test that failed to confirm infection in a Texas cow that was later found to have had the disease when a further test was carried out in England. A total of 439,126 tests had been carried out by last Wednesday. When the brain tissue has been preserved with formalin only the one kind of test, immunohistochemistry (IHC), can be carried out.

Anthrax Kills Hundreds of U.S. Cattle

Anthrax has killed more than 300 cattle in North Dakota and 200 in South Dakota, and has also hit 2 ranches in Texas. The weather has been blamed; anthrax spores can lie dormant in the soil for decades. Quarantines have been imposed. Vaccination is being considered. Penicillin and other antibiotics can save animals if they are diagnosed and treated quickly enough. Humans will not catch the disease unless they come into contact with the tissue and blood, generally by slaughtering and butchering a sick animal. Bison, deer, elk, horses, llamas and sheep may also have it, so people should take care.

Propane Tank Explodes at Navy Facility

A large fire was started by the explosion of a 4,500-pound propane tank at a Navy fire-fighter training area. Nobody was hurt.

Indoor air pollution heightens lung cancer risk

High levels of indoor air pollution increase people's chances of getting lung cancer. These are more likely to occur in countries where heating and cooking indoors with solid fuels is common. Tobacco smoking is far more risky, however.

Lawsuit Seeks Cancer Tests at Pa. Company

A lawsuit is claiming that a cluster of cases of brain cancer among people who worked at a research campus of Rohm and Haas Co. is significant, and that all present and past employees should receive regular screening. 14 of the 15 people affected have died. 5 who worked with or near pesticides got glioblastoma.

Encephalitis Kills 79 Children in India

At least 79 children have died from Japanese encephalitis, a mosquito-borne disease, in Lucknow, India in the past week. Many more are sick. There is only enough money to vaccinate a small proportion of children.

Please see the following message for the remaining stories.

 

Sue [sysop in NewsForum, World Issues, All Animals forums]
 OptionsReply to this Message Reply

#5 of 5

     Posted 8/20/05 9:34 PM   
Sue N
 
From  Sue N  Posts 1550  Last 10/30/08
To  All      [Msg # 110846.5 Message 110846.5 replying to 110846.4 110846.4 ]    

Effort on to Protect Nation's Power Grid

The University of Illinois Information Trust Institute has $7.5 million in federal funds to develop controls and sensors for a computer network to make the national power grid more reliable that it was during the power blackout in August 2003.

Scientists try to save rare and randy warbler

The aquatic warbler is facing extinction in spite of its randiness, thanks to habitat loss. A conference on how to help save it is being held in Palencia, northern Spain. It can now only be found in isolated strongholds in eastern Europe.

Experts: Ga. Pocket Gopher Near Extinction

The Southeastern pocket gopher, a rodent native to south Georgia, is near extinction there thanks to habitat loss. It lives in an underground network that it constructs, which benefits other animals too.

Woman Brings Illegal Lynx to Veterinarian

A woman left a cat at a veterinarian to be spayed and declawed, but the veterinarian recognised that it was a young lynx. Utah residents may not legally own a lynx.

Senators Attest to Alaska Climate Change

Senators John McCain (R - AZ), Hillary Rodham Clinton (D-N.Y.), Susan Collins, (R-Maine) and Lindsey Graham (R-S.C.) have visited Alaska and the Yukon, where they were shown the effects of global warming. Senators McCain and Joe Lieberman (D-Conn.) are sponsoring the Climate Stewardship and Innovation Act aimed at capping U.S. emission levels at levels recorded in 2000. For comparison the Kyoto Protocol, which President Bush walked way from, requires industrialized countries to cut their combined emissions to 5% below 1990 levels by between 2008 and 2012. Opponents of the legislation blame warming on natural geophysical cycles rather than man's actions. They include Sen. Ted Stevens (R-Alaska) chairman of the Senate Commerce, Science and Transportation Committee.

Arkansas Student Infects Worm With Virus

A student at the University of Arkansas for Medical Sciences has succeeded in infecting an earthworm with a virus. The virus she used is related to rabies and not unlike foot-and-mouth disease. Dies this sound like a good idea to you?

Explorer Seeks to Save African Resources

J. Michael Fay has flown around Africa at very low altitude, taking a large number of photographs for the National Geographic Society. He says that the focus of world leaders should be on long-term projects to preserve African sources.

Could 'Grizzly Man' Encourage Copycats?

Some people fear that a documentary called "Grizzly Man" about Timothy Treadwell, who gained celebrity status by living among grizzly bears and was eventually killed and eaten by them along with his girlfriend, may lead to copycat would-be celebrities.

World running out of time for oil alternatives

Leading Dutch energy researcher Ton Hoff says that we may not have time to develop cleaner forms of energy before shortages of oil and other fossil fuels make them unaffordable. "That's why we need to use fossil fuels in a more efficient way to have some more time to develop these alternatives up to a level where the robustness is guaranteed and their price has come down ... This could take decades for some technologies," he says


What chance do you see of avoiding a major flu pandemic?

Index of topics in this series.

[Views expressed are those of the author(s) and do not necessarily reflect those of CompuServe, Netscape, any government, agency, or news organization. External Websites are "At Your Own Risk," and no endorsement is expressed or implied.]

Sue [sysop in NewsForum, World Issues, All Animals forums]
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World Issues

Enviro. Aug. 18 '05 Avian Flu Due

  
 
     

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