Maize rough dwarf disease is a common epidemic disease in large areas.Its epidemic and occurrence mechanism is a complex process.In this paper,the epidemiologic
[Objective] The aim of this study was to determine and analyze the pathogen and the reasons of duck viral hepatitis which is prevalent recently and difficult to
[Objective] To study the therapeutic effects of traditional Chinese medicine prescriptions on infectious bronchitis(IB) and find a novel avenue for prevention a