Five Subtypes of Highly Pathogenic Avian Influenza Reported in China
CHINA - A total of 51 positive findings of five subtypes of Highly Pathogenic Avian Influenza (HPAI) have been reported and confirmed across China.
27 October 2014
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By: The Chinese veterinary authority reported all the outbreaks to the World Organisation of Animal Health (OIE) on 24 October. All outbreaks were reported as starting on 12 September and subsequently resolved, presumably because of a national campaign for surveillance testing on that day.
Each report describes the finding of a different viral subtype.
One Immediate Notification outlines 16 outbreaks of 'clicncal disease' casued by HPAI strain H5N1 detected in ducks, geese and chickens located in markets across China in the provinces of Guangxi, Qinghai, Guizhou, Yunnan, Tibet, Hunan and Jiangsu. There was a total of 18 virus-positive tests.
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A second Immediate Notification describes a subclinical case HPAI strain H5N3 in a duck sample in Hunan province.
The third Immediate Notification was for HPAI strain H5N8 in Panjin in Liaoning province. One positive sample was from a duck in a slaughterhouse and a second one in nearby wetlands.
A total of 24 outbreaks of clinical disease caused by HPAI strain H5N6 have been reported and confirmed in a Follow Up Report No. 2. The positive samples were obtained at markets and on one farm affecting ducks, geese and chickens in the provinces of Zheijiang, Hunan, Hebei, Guangdong, Heilongjiang, Anhui, Chingking, Guanxi, Yunnan, Guizhou, Tibet and Hubei. One outbreak at Heilongjiang involved two positive tests in a flock of 1,421 birds, all of which were destroyed.
The only previous outbreak of this virus type was on 23 August in Heilongjiang.
The fifth report from China dated 24 October is a Follow Up Report No.3, which outlines eight outbreaks of clinical disease caused by HPAI strain H5N2 detected in chickens and ducks. Six of these were from markets in Hubei, Guangxi, Liaoning,and Tibet, while two were presumably on farms. A total of 2,333 birds were destroyed after two of them were found to be positive for the virus in Heilongjiang province and in Ningxia, 3,920 birds were destroyed after four of them tested positive.
