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The Thai Journal of Veterinary Medicine

Abstract

There are many freshwater fish farms in every parts of Thailand, but mainly in the central part. Catfish (Clarias batrachus) amd snakehead fish (Ophicephalus striatus) are the most important economic species. The serious freshwater fish disease epidemic has been occurred from 1980 to 1985. This condition was firstly found in the southern part and then spread to all fresh-water fish of the country. The ulceration is the prominent lesion. Low water quality, particularly sudden drop of temperature in winter, is supposed to be an important predisposing cause. Several pathogens have been isolated: bacteria, particularly Aeromonas hydrophila, fungi (Achlya spp,), ecto-and endoparasites. Virus particle has been found by electorn microscopy. The primary cause of this ulcerative disease remains uncertain and should become the subject of an intensive investigation. Bacteria from the moribund fishes are destroyed after passing the process of salted and these salted fishes can be consumpted after cooking.

Publisher

Faculty of Veterinary Science, Chulalongkorn University

First Page

146

Last Page

164

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