2017—2018年西藏拉萨市养殖场及活禽交易市场禽流感流行病学调查

Epidemiological Investigation on Avian Influenza in Poultry Farms and Live Poultry Markets in Lhasa City of Tibet

为了解拉萨市禽流感流行情况,2017年11月—2018年3月,在拉萨市6个养殖场和11个活禽交易市场,随机采集1 394份棉试子进行禽流感病毒分离和分型鉴定。结果显示:H9亚型禽流感病毒阳性率为2.87%,未检出H3、H5、H6、H7等其他亚型病毒;活禽市场H9亚型阳性率(4.64%)显著高于养殖场阳性率(0.35%,P<0.01)。结果表明,拉萨市高致病性禽流感流行风险较小,低致病性禽流感流行以H9亚型为主,且流行率不高,但应进一步加强养殖环节的防疫、检疫,以及活禽市场的清洗、消毒等工作,防止禽流感传入和流行。

In order to recognize the infection situation of avian influenza in Lhasa City,from November 2017 to March 2018,1 394 cotton swab samples were randomly collected from 6 local poultry farms and 11 live poultry markets for virus separation and subtype identification.The results showed that the positive rate of H9 subtype avian influenza was 2.87%,while no H3,H5,H6,H7 and other subtype virus were identified.Extremely significant difference(P<0.01)existed in H9 positive rates between the poultry farms(0.35%) and live poultry markets(4.64%).In conclusion,the prevalence risk of highly pathogenic avian influenza in Lhasa City was low,and lowly pathogenic H9 was the main prevalence strain.However,related prevention, inspection and quarantine work during poultry production should be further strengthened,as well as the disinfection management in live poultry markets,hoping to prevent the avian influenza infection and spread.