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Virologica Sinica logoLink to Virologica Sinica
. 2011 Oct 7;26(5):289. doi: 10.1007/s12250-011-3192-y

Epidemiological investigation and genome analysis of duck circovirus in Southern China

Chun-he Wan 1, Guang-hua Fu 1, Shao-hua Shi 1, Long-fei Cheng 1, Hong-mei Chen 1, Chun-xiang Peng 1, Su Lin 1, Yu Huang 1,
PMCID: PMC8222482  PMID: 21979568

Abstract

Duck circovirus (DuCV), a potential immunosuppressive virus, was investigated in Southern China from March 2006 to December 2009 by using a polymerase chain reaction (PCR) based method. In this study, a total of 138 sick or dead duck samples from 18 different farms were examined with an average DuCV infection rate of ∼35%. It was found that ducks between the ages of 40∼60 days were more susceptible to DuCV. There was no evidence showing that the DuCV virus was capable of vertical transmission. Farms with positive PCR results exhibited no regularly apparent clinical abnormalities such as feathering disorders, growth retardation or lower-than-average weight. The complete genomes of 9 strains from Fujian Province and 1 from Zhejiang Province were sequenced and analyzed. The 10 DuCV genomes, compared with others genomes downloaded from GenBank, ranged in size from 1988 to 1996 base pairs, with sequence identities ranging from 83.2% to 99.8%. Phylogenetic analysis based on genome sequences demonstrated that DuCVs can be divided into two distinct genetic genotypes, Group I (the Euro-USA lineage) and Group II (the Taiwan lineage), with approximately 10.0% genetic difference between the two types. Molecular epidemiological data suggest there is no obvious difference among DuCV strains isolated from different geographic locations or different species, including Duck, Muscovy duck, Mule duck, Cheery duck, Mulard duck and Pekin duck.

Key words: Duck circovirus(DuCV), Epidemiological investigation, Genome, Phylogenetic analysis

Footnotes

Foundation items: Modern Agri-industry Technology Research System (CARS-43); Science and Technology Innovation Fund of Fujian Academy of Agriculture Science (STIF-02); Science and Technology Innovation Foundation for Young Scientists of Fujian Academy of Agriculture Science (2008QB-6).

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