Officials isolate farm and cull all chickens
Nakhon Sawan _ The Livestock Development Department yesterday confirmed that avian flu has re-emerged in Nakhon Sawan province. Department chief Sakchai Sriboonsue said the H5N1 strain was detected at Sriprai chicken farm, which belongs to Sriprai Kaewmaneechai, in tambon Pigul of Nakhon Sawan's Chumsaeng district.
All 56,670 chickens at the closed farm were culled yesterday.
Ten farm workers and three people who live near the farm were quarantined as a precaution.
Nakhon Sawan governor Kavi Kittisathaporn yesterday declared the province a bird flu outbreak zone and banned poultry movements without official permission. A permit can be obtained after a test on poultry samples.
The governor, accompanied by Mr Sakchai, provincial public health chief Buares Sripratak and other officials, inspected the area yesterday.
Mr Sakchai said the farm owner alerted livestock officials last Friday that 4,085 chickens had died in one of the four buildings on her farm.
Laboratory tests showed 10 samples were H5N1 positive.
The authorities then culled the remaining 9,915 chickens in the second building where infections were detected.
Disinfectant was sprayed at the farm, the village and nearby villages in a 5km radius.
As a precaution, the department conducted cloacal swabs in other buildings on the farm and every farm in the flu-infected village. Twenty swab samples were collected from every village in the affected area.
The provincial public heath office and other administrative agencies had been told to monitor infected human cases, he said.
District chief Pitsanu Senawin said the farm is to kill all chickens in the other three buildings and the tambon administration organisation would bury the carcasses at the farm.
''Other poultry outside the farm tested negative for the flu,'' Mr Pitsanu said. He suspected the flu came from people entering the farm or from open-billed storks.
The outbreak is the fifth in Thailand and comes about 10 months after the last one.
Permanent secretary for agriculture Yukol Limlaemthong said the World Organisation for Animal Health had been informed of the outbreak as well as countries which imported Thai chickens.
He said he expected no impact on chicken exports because Thai exporters supplied cooked chicken products. Besides, infections were found in only one location.
Panya Chotitawan, chairman of Sahafarm Group, said the spread should be controllable because it happened in a closed-farm system. He blamed the outbreak on lax restrictions on people and vehicles entering the farm.
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