Abstract:

To investigate the prevalence of major epidemics in cherry valley ducks in southern China, the author detected infectious agents in samples of cherry valley duck in different growth period collected from southern China. The results showed that: the major infectious diseases occurred among brooding cherry valley ducks (1-4-week-old) were mainly duck infectious serositis, duck viral hepatitis type Ⅰ and duck E.coli. Cherry valley ducks during growing-finishing period (5-21-week-old) were mainly infected with duck E.coli, R. anatipestifer and duck circovirus, from which avian Pasteurella multocida and Newcastle disease virus were also isolated occasionally. Cherry valley ducks during laying period were mostly infected with duck E.coli, and also could be infected with duck tembusu virus or duck circovirus. The results indicated that the situation of epidemics in cherry valley duck was becoming increasingly complex and grim, and the infectious agents in different growth stages were not the same. The surveillance of epidemics would be helpful for the prevention and control of diseases in cherry valley duck.