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Some 631 chickens were destroyed at one Taiwanese farm in an effort to prevent further spread of an outbreak of highly pathogenic avian influenza virus (HPAI), according to a World Organization for Animal Health (OIE) immediate notification report Dec. 7.The outbreak occurred on a farm in Ma-Gong City in Peng-hu prefecture.The owner of the farm called in Taiwanese veterinary experts to check on an unusually high number of bird deaths in November.The farm had more than 800 susceptible chickens, in which 200 had already died. The remaining 631 birds were culled as a precautionary measure.Laboratory analysis by the Animal Health Research Institute revealed positive findings for HPAI serotype H5N2 using reverse transcription - polymerase chain reaction (RT-PCR) and intravenous pathogenicity index (IVPI) test.According to the report, a clinical and epidemiological investigation of three surrounding poultry farms was conducted. No other cases were detected.According to the World Health Organization, Avian influenza (AI) is an infectious viral disease of birds (especially wild water fowl such as ducks and geese), often causing no apparent signs of illness. AI viruses can sometimes spread to domestic poultry and cause large-scale outbreaks of serious disease. Some of these AI viruses have also been reported to cross the species barrier and cause disease or subclinical infections in humans and other mammals.AI viruses are divided into two groups based on their ability to cause disease in poultry: high pathogenicity or low pathogenicity. Highly pathogenic viruses result in high death rates (up to 100% mortality within 48 hours) in some poultry species. Low pathogenicity viruses also cause outbreaks in poultry but are not generally associated with severe clinical disease.For more infectious disease news and information, visit and “like” the Infectious Disease News Facebook page
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