Meta-analysis of Bluetongue Virus Prevalence in Sheep Flocks in China from 2012-2022
The aim of this research was to systematically evaluate and analyze the infection status of bluetongue virus(BTV)in sheep flocks in China from 2012 to 2022,and to provide evidence for the prevention and control of BTV in sheep flocks in China.A Meta-analysis was conducted after searching the databases of CNKI,Wanfang,VIP,PubMed and ScienceDirect for articles on the sheep BTV prevalence in China published from 2012 to 2022.After searching and screening,a total of 28 studies were brought into the Meta-analysis,including 38 226 sheep of which 9 109 sheep were BTV positive.The overall prevalence of BTV was 23.8％(95％CI:23.4,24.3)in sheep and goats,29.4％(95％CI:14.7,44.1)in sheep and 25.1％(95％CI:18.6,31.7)in goats.Among provinces/cities in China,the prevalence was highest in Chongqing 34.6％(95％CI:32.0,37.1),followed by Yunnan province and Inner Mongolia Autonomous Region.Sub-group analysis showed that there were significant regional differences in the prevalence of BTV(P=0.011).The prevalence of BTV in eastern,southern,western,northern and central areas of China were 6.1％(95％CI:4.3,7.9),33.8％(95％CI:29.5,38.1)and 21.7％(95％CI:17.1,26.2),21.0％(95％CI:8.3,33.6)and 26.6％(95％CI:24.3,28.8),respectively.At the same time,detection methods and climate types were also risk factors for BTV prevalence in sheep in China(P＜0.05).The results showed that the prevalence of BTV was high and the dis-tribution was wide among sheep in China.It is necessary to continue the surveillance and preven-tion of BTV infection in China.
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