5 3 月 2006 at 12:09 上午 #3304馬丁參加者
German article: no need to fear songbirds [a [machine translation"]
Hard times for storks and swallows: Because many humans worry themselves the fact that migratory birds could transfer H5N1 vergraulen them the feather/spring cattle, which normally nistet in the proximity of human settlements. "we gotten to time messages that for example humans push the refuges of white storks of their roof, around the animals to drive out", reports professor Dr. Franz Bairlein, director of the institute for bird research in Wilhelmshaven and president of the German Ornithologi society. Vogelschuetzer report also of the fact that anxious humans ask the NIST places of swallows zuspachteln or, whether there are special devices, with which one ducks from property keep away can. With the nature protection federation Germany (Nabu) one registers such messages anxiously. "that is not a over reaction, it exists a reason to the panic", stresses Markus Nipkow, adviser for Ornithologie and bird protection with the Nabu. "the epidemic concentrates naturally on wassergefluegel [waterbirds, surely; but even these killed by H5N1 – bar a few ducks that prove extremely hard to find in the wild], most other kinds of bird is not at all concerned. That applies also to singing birds." Small infection risk by singing birds In the laboratory it succeeded to scientists to infect singing birds with the dangerous bird flu virus H5N1. "in Southeast Asia got sick also a haussperling, which lived Franz Bairlein with house poultry on a chicken yard", reports. With only one case in nine years bird flu gotten sick singing birds are in addition, in Asia a rarity. "singing birds have contact in their natural environment hardly to potenzielle virus carriers", describe the ornithologist. "differently than water birds blackbirds live alone or with their partner in the forest and keep themselves away from kind comrades. for example"
Experts therefore see no reason adjusting the winter feeding of singing birds. "it is still very cold, one can thus calmly further feed. One should clean and no dead animals touch the fodder place however caution for the sake of with gloves ", guesses Nabu expert Markus Nipkow. Swans and ducks do not feed Ornithologists advise against however strictly to feed swans and ducks at ponds or rivers. "it does not concern thereby so much that humans can be infected with the animal, that holds I for relatively improbable", says Nabu Vogelexperte Markus Nipkow. "however by feeding animals meet more near, which normally keep themselves away from kind comrades. By this artificial proximity the virus can infect more easily further animals ", describes it.
Early storks come from Spain Storks, which reach Germany in these weeks, wintered mostly in Spain. There there is so far however no bird flu. Therefore the animals with large probability H5N1 do not have. "the animals, which pull from Africa here, come only many later, usually only in April", stressed dock Michael Thomsen of Michael petrol Michael-Otto-Institut in the Nabu. Besides in the appropriate wintering areas in Africa still no H5N1 arose. The case in Nigeria is limited to utilizable animals and is to an illegal animal import to be due. In the wintering areas of migratory birds it so far still no H5N1 gives. If thus storks on the roof nisten, one should let them grant calmly. "and also in the times of the bird flu the nature protection laws apply not to be disturbed, after those the NIST places by threatened animal species may." An infection danger threatens only over excrement of bird droppings can besides always pathogens such as Salmonellen contained. "it is enough however to wash itself the hands if one were in the garden", says the dock Michael Thomsen. "otherwise one does not approximate the animal." In Lower Saxony scientists examine now completely purposefully also excrement samples of white storks, which return in these weeks again to Germany. "we hope that we can take thereby also the fear of the animals to the population, if we prove that they are not infected, stress" Franz Bairlein.5 3 月 2006 at 9:53 上午 #4159馬丁參加者
Just had email from German birder, returned from birding trip inc South Korea [and HK]:引用：Back at home I realised, that the situation was out of control in Germany. At work I had applications for removal of House Martin nests (I work in the department of Species Conservation of the city of Berlin), veterinarians closed down our wild bird rescue station, and I was asked, whether children still could play in parks. In eastern Germany the first White Stork nestes are to be removed, and in one state in SW-Germany a law to shot down ervery strange flying bird is in serious discussion.
This situation is in strong contrast to what I learnd about Poultry Flu from you, the Asian ornithologists.
Therefore I wrote a letter and sent it to the relevant bodies in Germany. I enclose this letter, but because it is written in german I summarise it als follows: It is unlikely, that wild birds are vektors for the desease about longer distances. There is no correlation between migration routes and the spread of Poultry flu. Only one occasion with a likely transport via wild birds (from China to southern Mongolia) is dokumented, where the desease tapered off after a while. No poultry was affected. There are countries with many migrants from affected areas (Japan, South Korea, Malaysia) without Poultry flu outbreaks within the wild, but these countries do have stong import controls. Instead of this it is possible to explain the spread of Poultry flu with the trade of poultry and poultry products. The latter include chicken faeces (as fertilizer for fishery and agriculture purposes) and and chicken litter (as food for domestic stock, including chicken). The virus can survive under good conditions up to 30-35 days outside living birds. So far in Europe, swans are among the first victums of Poultry flu outbreaks in the wild. This might be explained by their feeding ecology (in fishponds as well as on fields). I condluded, that the tale of wild birds as vektors obviously prevents the authorities to search for the real causes of the actual outbreaks.
This letter has got some attention (as was intended). There was a lot of approval, but also some criticism. I am going to answer it, but maybe you can help me with some thoughts. I will search the internet for additional arguments, but you might have the answers right in your mind.
I’ve sent quick answers:
Glad you’ve sent the letter, and stirred a little debate.
Way too much panic in Europe I believe. Also terrible re cat owners dumping pets (I’ve read).
Quick attempts at answers:引用：There were connections via migrants from southwest Siberia to the Black Sea coast. This westward movement of Poultry flu might have happen over some migration periods, even without noticable outbreaks at the migration stops in between.
– no, it is fanciful that it could happen “over some migration periods”. Poultry flu is invariably lethal to wild birds (may be some ducks – some individuals – that survive, but if present in wild birds, get deaths).
As well as connections via migrants, also trade connections, including smuggling.引用：Most birds do not die within an outbreak. Healthy birds can transport the virus over long dinstances. This is supported by the fact, that there were dying birds at different places in Europe within a very short time – quite unlikely, that there was transport of infected material to all these places within short time.
– evidence for “most birds do not die” please? So far, evidence strong that most birds do die.
Meaning of the dying birds – mostly swans – in Europe is unclear. We don’t know if all the infected swans are dying, even after moving as result of cold weather (and not being fed by people?)
So far, I haven’t seen re even one apparently healthy wild bird being found to have H5N1 in Europe/west Asia. (And no wild bird at all, so far, that I know of in Africa.)
In Romania, case of infected swans on some ponds; observation and testing showed they didn’t infect other waterbirds sharing the ponds.
Here in Hong Kong, virus present and nearby for 10 years now. Mostly, for this time, not present in poultry or wild birds here. As yet, all cases in wild birds have been in dead birds. Over 16,000 apparently healthy wild birds tested so far; all negative.
– how to explain this, other than virus dying out as wild birds die.
Likewise, recently published research shows 4 distinct strains in southern China:引用：There were outbreaks also in countries with strict import controls like Japan and South Korea (Januar 2004), and Malaysia might have had some outbreaks but did not admit them.
– controls have strengthened; yet virus hasn’t recurred.
Many migrant waterfowl to Japan and S Korea – as you’ve seen; yet – like Hong Kong – no evidence of H5N1 in them.
[HK this winter – none in waterfowl; some in a few songbirds, and crows: starting after around Chinese New Year, associated with H5N1 in at least one smuggled chicken.]
– if indeed readily carried by wild waterbirds, why no outbreaks in wild waterbirds east of Caspian Sea, right across to Japan, this past autumn and this winter? People are testing in several places; including India, where many Qinghai birds spend the winter.
– Malaysia had small recent outbreak, blamed on smuggled fighting cocks.引用：Fertilizer and Food from chicken faeces and litter: it is very unlikely, that this material can come within three weeks from China to Germany.
– Doesn’t have to be this way. Mixture of ways that avian flu spreads in poultry industry. Day old chicks, dirty crates etc. Spread thro Russia, along rail lines and roads, then to Turkey/eastern Europe.引用：Can the virus be in one area, and cause an outbreak some 12-15 weeks later?
– seems so; Vietnam thought they eradicated it, but returned.
Also in recent paper: a virus strain introduced to Vietnam was close to one from sw China, it was thought transport was likely cause.
A terrible situation.
The problems are within farming; it was poultry farming that created this form of H5N1 (and its various strains), and is chiefly responsible for spread.
I believe we will look back on this period, and find it shameful. And maybe wonder why people weren’t more stout-hearted, perhaps even standing back to look at the facts – including that it’s not easy to catch H5N1: one way in Vietnam was drinking raw duck blood.