Occurrence and spread of influenza A(H1N1)pdm09 virus infection in Norwegian pig herds bad on active rosurveillance from 2010 to 2014期刊名称： Epidemiology & Infection
作者： ER, C.,SKJERVE, E.,BRUN, E.,FRAMSTAD, T.,LIUM, B.
年份： 2016年
期号： 第15期
关键词： Active rosurveillance; influenza A; pandemic H1N1; pig; temporal and
spatial
摘要：The incursion of influenza A(H1N1)pdm09 virus was detected by Norway's active rosurveillance of its pig population in 2009. Since then, surveillance data
from 2010 to 2014 revealed that 54% of 5643 herd tests involving 1567 pig herds and 28% of 23 036 blood samples screened positive for antibodies against influenza
A virus. Positive herds were confirmed to have influenza A(H1N1)pdm09 virus infection by haemagglutination inhibition test. In 50% of positive herd tests, 60% of the sampled pigs in each herd had antibodies against influenza A(H1N1)pdm09 virus. This within-herd animal roprevalence did not vary for type of production, herd size or year of test. The overall running mean of national herd roprevalence, and annual herd incidence risks fluctuated narrowly around the means of 45% and 32%, respectively, with the
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