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« Saving animals from the grassroots up | Main | Are you ready for the dog and cat flu? »

30 November 2009

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Dr. Tony Johnson

Good job, Christie! You got picked up by Google News! Thanks for helping to spread the word, and helping to calm fears. I am glad we are spreading real information, not fear.

The OTHER Pat

Dr. Tony - a question: From the article:



“If animals can get infected from humans, then the reverse is also true,” said Feng Zijian, director of emergency response for the Chinese Center for Disease Control and Prevention.



Is this a correct statement? I thought that diseases DON'T always have a "two-way" transmission. That is, I thought that just because a disease transfers from human to animal, for example, that it is NOT necessarily the case that then the reverse (animal to human) is also true.



Was this a mis-statement by the Chinese official?

Janeen

The thing that worries me most about this - especially in China - is the possibility of an enormous, ulgy over-reaction by humans.



Anyone else remember how the Chinese dealt with bird flu...

The OTHER Pat

Yeah, that was the first thing that came to my mind, too. Although it's a hopeful sign that the Chinese CDC guy was actually quoted as saying that there's no need for panic . . . . . . .

Anne T

Wonderful. H1N1 and it's variants are interspecies specific. Lovely. Since nothing will be done to curb this, since it's coming from China, our friend because she buys up our debt to fund our government. If Nixon weren't already dead, I'd shoot the bast*rd!

"Influenza viruses of the H3N2 subtype were still circulating in humans in May of 1977 when H1N1 viruses were isolated in China and then Russia. In the winter of 1977-78 the H1N1 viruses caused epidemic infection throughout the Northern Hemisphere. The results of serological tests indicated that the HA and NA glycoproteins of the 1977 H1N1 viruses were very similar to those from viruses of the same subtype which circulated in 1950. Palese’s group compared viral RNA of one 1977 isolate, A/USSR/90/77, with RNA from a virus isolated in 1950. To their surprise, the two viral RNAs were highly related. In contrast, there was less similarity between viral RNAs from the 1977 H1N1 virus and H1N1 viruses that circulated in humans between 1947 and 1956.



Why were the viral genomes of the 1977 H1N1 isolate and the 1950 virus so similar? If the H1N1 viruses had been replicating in an animal host for 27 years, far more genetic differences would have been identified. The authors suggested several possibilities, but only one is compelling:



…it is possible that the 1950 H1N1 influenza virus was truly frozen in nature or elsewhere and that such a strain was only recently introduced into man.



The suggestion is clear: the virus was frozen in a laboratory freezer since 1950, and was released, either by intent or accident, in 1977. This possibility has been denied by Chinese and Russian scientists, but remains to this day the only scientifically plausible explanation."

http://www.virology.ws/2009/03/02/origin-of-current-influenza-h1n1-virus/

straybaby

Weren't they also recently running around killing dogs because of rabies or something?



What worries me is that if it does start mutating, we will get a severe reaction . . . (from their and other governments, not the pets!)

Dr. Tony Johnson

OP -

Honestly, I am not sure. I think it depends on the virus-host interaction, and we don't know enough about H1N1 to say conclusively. Mind you - I am not a virologist, or specialist in infectious diseases.



My gut is that this statement is not correct.

Gina Spadafori

The AVMA and USDA is now reporting H1N1 positives in a zoo cheetah in California and in a turkey breeder's flock in Virginia:



http://www.avma.org/public_health/influenza/new_virus/default.asp

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