yeeha more bird flu
Posted: Sat Feb 25, 2017 9:27 am
Bird flu infection rates on Chinese poultry farms may be far higher than previously thought, because the strain of the deadly virus that has killed more than 100 people this winter is hard to detect in chickens and geese, animal health experts say.
A total of 304 new laboratory-confirmed human infections were reported in mainland China between Jan. 19 and Feb. 14, along with 36 deaths, the WHO said in its latest update on Monday.
Poultry that have contracted the H7N9 strain of the avian flu virus show little or no sign of symptoms. That means any infection is only likely to be detected if farmers or health authorities carry out random tests on a flock, the experts said.
But in humans, it can be deadly.
That's different to other strains, such as the highly pathogenic H5N6 that struck South Korean farms in December, prompting the government to call in the army to help cull some 26 million birds.
But that strain didn't kill any people.
There have been multiple outbreaks of bird flu around the world in recent months, with at least half a dozen different strains circulating. The scale of the outbreaks and range of viral strains increases the chances of viruses mixing and mutating, with new versions that can spread more easily between people, experts say.
For now, H7N9 is thought to be relatively difficult to spread between people. China's Center for Disease Control and Prevention has said the vast majority of people infected by H7N9 reported exposure to poultry, especially at live markets.
"There are very few, if any, clinical signs when this (H7N9) virus infects birds, and that's the main reason we're not seeing reporting coming from poultry farms in China," said Matthew Stone, deputy director general for International Standards and Science at the World Organisation for Animal Health (OIE).
http://www.reuters.com/article/us-healt ... SKBN15W0KF
A total of 304 new laboratory-confirmed human infections were reported in mainland China between Jan. 19 and Feb. 14, along with 36 deaths, the WHO said in its latest update on Monday.
Poultry that have contracted the H7N9 strain of the avian flu virus show little or no sign of symptoms. That means any infection is only likely to be detected if farmers or health authorities carry out random tests on a flock, the experts said.
But in humans, it can be deadly.
That's different to other strains, such as the highly pathogenic H5N6 that struck South Korean farms in December, prompting the government to call in the army to help cull some 26 million birds.
But that strain didn't kill any people.
There have been multiple outbreaks of bird flu around the world in recent months, with at least half a dozen different strains circulating. The scale of the outbreaks and range of viral strains increases the chances of viruses mixing and mutating, with new versions that can spread more easily between people, experts say.
For now, H7N9 is thought to be relatively difficult to spread between people. China's Center for Disease Control and Prevention has said the vast majority of people infected by H7N9 reported exposure to poultry, especially at live markets.
"There are very few, if any, clinical signs when this (H7N9) virus infects birds, and that's the main reason we're not seeing reporting coming from poultry farms in China," said Matthew Stone, deputy director general for International Standards and Science at the World Organisation for Animal Health (OIE).
http://www.reuters.com/article/us-healt ... SKBN15W0KF