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epizootic ulcerative syndrome
Epizootic ulcerative syndrome (EUS) is a disease caused by the water mould ''Aphanomyces invadans''. It infects many freshwater and brackish fish species in the Asia-Pacific region and Australia. The disease is most commonly seen when there are low temperature and heavy rainfall in tropical and sub-tropical waters. It may also be referred to as mycotic granulomatosis (MG) and Red Spot Disease (RSD).
==Clinical Signs & Diagnosis==
At first, fish develop red spots on the skin. These lesions expand to form ulcers and extensive erosions filled with necrotic tissue and mycelium. This is followed by the development of granulomas on the internal organs and death.
A provisional diagnosis can be made by using squash preparations of the skeletal muscle from beneath an ulcer to identify the septate hyphae of the water mould. Definitive diagnosis can be made based on histopathogical findings and isolation of the pathogen.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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