Epizootic Ulcerative Syndrome (EUS): An Aquatic Ecosystem-Threatening Disease
Narsale Swapnil*
Dept. of Fish Pathology and Health Management, Fisheries College and Research Institute, Thoothukudi, Tamil Nadu (628 008), India
Patekar Prakash
Fish Nutrition, Biochemistry, and Physiology Division, ICAR-Central Institute of Fisheries Education, Versova, Mumbai, Maharashtra (400 061), India
DOI: NIL
Keywords: Aphanomyces invadans, Aquatic Animal Health Management, CIFAX, Epizootic Ulcerative Syndrome (EUS)
Abstract
The name "epizootic ulcerative syndrome" (EUS) was developed to characterize a severe cutaneous ulcerative epizootic disorder that affects a variety of wild and farmed freshwater and estuary finfish species. EUS-infected fish is characterized by the presence of single or multiple lesions with acute dermatitis, hyperemia, and edema leading to deep ulcers. It has been observed that EUS has an impact on more than 100 fish species. Aphanomyces invadans, a pathogenic fungus, has been associated with the transmission of EUS, however, the agent hasn't yet been demonstrated to enter and cause the disease by itself. Environmental variables such as heavy rainfall, bad water quality, and low pH have been linked to the development of EUS. Ash, turmeric, neem branches (Azadirachta indica), dried banana leaves, CIFAX, and other therapies have been tried with varying degrees of success for preventative treatments of the EUS-infected fish.
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Reference
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