臺灣中南部地區鴨多重病原感染之監測（2008－2009）

Abstract

Several infectious diseases of duck were reported in central and south areas of Taiwan during 2008 to 2009. The aims of this study were to diagnose the etiological pathogens of these outbreaks and suggest the preventive strategies for the owners. In this study, 80 ducks from 18 individual fields or farms were collected. The sampling farms located in the Yunlin, Chiayi and Tainan counties. All the cases were diagnosed by microbiological cultivations, regular naked eye and histopathological examinations and molecular diagnostic methods. The percentage of the major pathogens and the number of farms involved (by a descending order) for goose parvovirus, duck viral hepatitis (DVH) and Riemerella anatipestifer were 28.75% (23/80) and 55.55% (10/18), 27.50% (22/80) and 38.88% (7/18), and 18.75% (15/80) and 38.88% (7/18), respectively. The microbial cultivation results indicated that the mixed infections were commonly found in these outbreaks. About 31 percent (25/80) of ducks infected with 2 pathogens and about 4 percent of ducks infected with 3 pathogens. Considering the prophylactic and managing strategies for these diseases, the goose parvovirus and DVH are mainly detected in duckling stage. Thus, before the eggs production, suitable vaccination programs for breeding flocks should be advocated, i.e. the higher levels of maternal antibodies can be induced for progenies protection. However, import ducklings from hyperimmunized breeders are the fundamental solution for both diseases. For the prevention of circovirus and RA, good hygiene and proper biosecurities are necessity. The results of this study can be serving as the background information of duck diseases control in Taiwan.