西藏拉萨市H9亚型禽流感和新城疫流行病学调查与分析

Epidemiological investigation and analysis of H9 subtype avian influenza and Newcastle disease in Lhasa, Tibet

为了解拉萨市H9亚型禽流感和新城疫的流行现状,2017~2018年,在拉萨市7个规模养殖场和8个活禽交易市场进行随机采样,对所采集的1192份棉拭子进行H9亚型禽流感病毒和新城疫病毒分离与分型鉴定。结果显示:H9亚型禽流感病毒阳性率为0.84%(95%CI:0.4,1.5),新城疫病毒阳性率为3.27%(95%CI:2.4,4.4)。其中活禽交易市场的新城疫病毒的阳性率(7.04%)高于养殖场(0.58%)(P<0.01)。结果表明,拉萨市H9亚型禽流感和新城疫流行率不高,但应加强活禽交易市场的清洗、消毒工作,以及完善养殖场防疫、检疫程序,防治禽流感及新城疫的流行。

In order to understand the epidemic status of H9 subtype avian influenza and Newcastle disease in Lhasa,from 2017 to 2018,random samples were collected from 7 large-scale farms and 8 live poultry trading markets in Lhasa,and 1192 cotton swabs were collected to isolate and classify H9 subtype avian influenza virus and Newcastle disease virus.The results showed that the positive rate of H9 subtype avian influenza virus was 0.84%(95%ci:0.4,1.5),and the positive rate of Newcastle disease virus was 3.27%(95%ci:2.4,4.4).The positive rate of Newcastle disease virus in live poultry market(7.04%)was higher than that of breeding plants(0.58%)(P<0.01).The results showed that the epidemic rate of H9 subtype avian influenza and Newcastle disease in Lhasa was not high,but the cleaning and disinfection of live poultry trading market should be strengthened,and the epidemic prevention and quarantine procedures of poultry farms should be improved to prevent and control the epidemic of avian influenza and Newcastle disease.