- Dec 16, 2015
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Just found another article about this called
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This chicken vaccine makes its virus more dangerous
The deadliest strains of viruses often take care of themselves — they flare up and then die out. This is because they are so good at destroying cells and causing illness that they ultimately kill their host before they have time to spread.
But a chicken virus that represents one of the deadliest germs in history breaks from this conventional wisdom, thanks to an inadvertent effect from a vaccine. Chickens vaccinated against Marek’s disease rarely get sick. But the vaccine does not prevent them from spreading Marek’s to unvaccinated birds.
“With the hottest strains, every unvaccinated bird dies within 10 days. There is no human virus that is that hot. Ebola, for example, doesn’t kill everything in 10 days.”
In fact, rather than stop fowl from spreading the virus, the vaccine allows the disease to spread faster and longer than it normally would, a new study finds. The scientists now believe that this vaccine has helped this chicken virus become uniquely virulent. (Note: it only harms fowl). The study was published on Monday in the journal PLOS Biology.
This is the first time that this virus-boosting phenomenon, known as the imperfect vaccine hypothesis, has been observed experimentally.
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This chicken vaccine makes its virus more dangerous
The deadliest strains of viruses often take care of themselves — they flare up and then die out. This is because they are so good at destroying cells and causing illness that they ultimately kill their host before they have time to spread.
But a chicken virus that represents one of the deadliest germs in history breaks from this conventional wisdom, thanks to an inadvertent effect from a vaccine. Chickens vaccinated against Marek’s disease rarely get sick. But the vaccine does not prevent them from spreading Marek’s to unvaccinated birds.
“With the hottest strains, every unvaccinated bird dies within 10 days. There is no human virus that is that hot. Ebola, for example, doesn’t kill everything in 10 days.”
In fact, rather than stop fowl from spreading the virus, the vaccine allows the disease to spread faster and longer than it normally would, a new study finds. The scientists now believe that this vaccine has helped this chicken virus become uniquely virulent. (Note: it only harms fowl). The study was published on Monday in the journal PLOS Biology.
This is the first time that this virus-boosting phenomenon, known as the imperfect vaccine hypothesis, has been observed experimentally.
Sorry about your Roos, I was caring for a friend's WTB; 16wks, vaccinated for Mareks from McMurray, out of an order of 15 (WTB, WTG, Light Brahma, Polish). Last weekend she notified me one was found leg out, on the ground. Thought perhaps a vitamin defiencey; Cinnamon was perky, eating, drinking & pooping; so she brought her to me (she works full time, I'm retired). I treated with Vitamin B Complex, Poultry Cell, egg yolk, tofu and fermented Flock Raiser ... Been waiting for Dels/
I'm afraid the changes I might be seeing are too insignificant to determine the antibiotics are working. I wanted to give him his painkillers a little bit earlier today as I had to go somewhere but he was eating like a madman, like he hadn't eaten in days. I sat there, chickens on my lap, watching him eat for maybe 20 minutes. I didn't want to disturb him. He never stopped eating since he was sick but I never saw him this dedicated... it also looks like he's trying to get up, but he still fails and falls over head first. Above that it's getting harder and harder to give him any medicine because he resists so much, he isn't weak... we did notice his left leg is cold and the right one is warm, but if it was a blocked nerve I'd think he would be able to use the other leg...
if you have there time & Phil's still spunky, you can always call the Vet later.
