Industry caused the flu; why blame wild birds?

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Interesting excerpts:

“To date, extensive testing of clinically normal migratory birds in the

infected countries has not produced any positive results for H5N1 so far.”

Wild migratory birds and backyard poultry are the victims and not carrier of

the disease.

...migratory birds and backyard poultry are not effective vectors of bird flu.

 

http://www.financialexpress.com/fe_full_story.php?content_id=119545

Industry caused the flu; why blame wild birds?

ASHOK B SHARMA

 

Not just in India, industrial poultry is the cause of the spread of the bird

flu outbreak worldwide.

Several studies show that transnational poultry industry is the root cause of

the problem. The spread of industrial poultry production and trade networks have

created ideal conditions for the emergence and transmission of lethal viruses

like the H5N1 strains of bird flu. -->

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Inside factory farms viruses becomes lethal and multiply. Air thick with viral

load from infected factory farms is carried for kilometres, while integrated

trade networks spread the disease through many carriers like live birds and

chicken manure. Comparatively, the backyard poultry are not fuelling the

current wave of bird flu outbreaks stalking large parts of the world. The

epicentre of the outbreaks is the factory farms of China and South East Asia.

While wild migratory birds can carry the virus, at least for short distances,

the viruses are spread by the unhygienic factor farms, global studies said.

This situation is very true in case of the recent outbreak of bird flu in India.

The epicentre of the outbreak was in 18 factory farms in and around Navapur in

Maharashtra, where there are no sanctuary for migratory birds in the vicinity.

The UN Food and Agriculture Organisation in November 2005 said, “To date,

extensive testing of clinically normal migratory birds in the

infected countries has not produced any positive results for H5N1 so far.” Even

with the current cases of H5N1 in wild birds in Europe, experts agree these

birds probably contacted the virus in the Black Sea region, where H5N1 is well

established in poultry, and died while heading westward to escape the unusually

cold conditions. The attributed reasons for the spread of H5N1 virus by

migratory birds among geese in Qinghai Lake in north China was negated by the

BirdLife International which pointed out that the lake has many surrounding

poultry farms. It has also integrated fish farms where chicken faeces are

commonly used as feed and manure. Besides, rail routes connect the region to the

areas of bird flu outbreaks like Lanzhou. Wild migratory birds and backyard

poultry are the victims and not carrier of the disease. The geographical spread

of the disease does not match with migratory routes and seasons, the BirdLife

International report said. A study done by a global

organisation, Grain shows that migratory birds and backyard poultry are not

effective vectors of bird flu. For example, in Malaysia, the mortality rate from

H5N1 among village chicken is only 5%, indicating that the virus has a hard time

spreading among small scale chicken flocks. H5N1 outbreaks in Laos, which is

surrounded by infected countries, have only occurred in the nation’s few factory

farms, which was supplied by Thai hatcheries. The only case of bird flu in

backyard poultry, which account for over 90% of Laos production, occurred next

to infected factory farms. The lethal bird flu outbreaks took place in large

factory farms in Netherlands in 2003, Japan in 2004 and Egypt in 2006. The

Nigerian outbreak earlier this year occurred in a single factory farm distant

from hot spots of migratory birds, but known for importing unregulated hatchable

eggs. In September 2004, Cambodian authorities noted that the source of bird

flu outbreak was chicks supplied by the Thai company,

Charoen Pokphand. This company dominates the feed industry and is the biggest

supplier of chicks to China, Indonesia, Vietnam and Turkey, which have witnessed

bird flu outbreaks. Ukraine, where bird flu occurred, imported 12 million live

birds in 2004. Russian authorities pointed out that feed as one of the main

suspected sources of an H5N1 outbreak at a large factory farm in Kurgan

province. A newsletter of e-Pharmail said the outbreak of avian flu in

Maharashtra may be due to inoculating improperly cultured vaccine (inactivated

viruses) in poultry, allegedly distributed by Venkateshwara Hatcheries.

 

 

 

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