Abstract
Recently, duck hepatitis A virus genotype C (DHAV-C), a causative agent of duck viral hepatitis, has been responsible for increasing economic losses in the duck industry in China and South Korea. In this study, a real-time PCR assay targeting the 2C gene for detecting DHAV-C was developed. The assay was confirmed to be specific and sensitive, and the minimum detection limit was 3.36 × 10(3) copies per reaction, making this assay suitable for rapid diagnosis of DHAV-C infection from clinical samples. In addition, the dynamics of the viral loads in tissues of specific-pathogen-free (SPF) ducklings infected with DHAV-C were investigated using this method. The DHAV-C could be detected earliest in the liver within 12 h postinfection. Moreover, high viral loads were identified in the heart, liver, spleen, lung, kidney, bursa of Fabricius, thymus, pancreas, brain, and small intestine after 24 h postinfection. Taking the data collectively, the study described in this report is the first to have developed a real-time PCR method for detection of DHAV-C and thus contributes to pathogenicity research.
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