Prevalence of Duck Circovirus Infection of Subclinical Pekin Ducks in South Korea

概要

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An investigation was carried out to determine the prevalence and infection pattern of duck circovirus (DuCV) in subclinical Pekin ducks on South Korean duck farms. A total of 147 samples collected from 92 duck farms in five provinces was examined from 2011 to 2012. The overall prevalence of DuCV PCR-positive from pooled bursa of Fabricius and liver samples was 21.8% (32/147). The prevalence of DuCV PCR-positive increased significantly in 3-week-old ducks compared to that in 1-week-old ducks (P<0.05). DuCV in association with Riemerella and Salmonella infections (10.9%; 16/147) occurred at the same level compared with single DuCV PCR-positive (10.9%; 16/147). Compared with relationship of bacterial diseases morbidity (salmonellosis, Riemerella infection) in existing DuCV or not, morbidity was higher in circovirus-positive (50%; 16/32) than in circovirus-negative farms (26.1%; 30/115). Our findings provide baseline information on the degree of DuCV infection and distribution and pattern of DuCV in ducks and it is evident that DuCV can be associated with subclinical diseases and subclinical infection could be economically important.
公益社団法人日本獣医学会の論文