• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

1992 Fiscal Year Final Research Report Summary

Fundamental study on fungal diseases of fish and shellfish

Research Project

Project/Area Number 03660328
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Applied veterinary science
Research InstitutionNippon Veterinary and Animal Science University

Principal Investigator

HATAI Kishio  Nippon Veterinary and Animal Science University, Faculty of Veterinary and Animal Science, Professor, 獣医畜産学部, 教授 (30164841)

Project Period (FY) 1991 – 1992
Keywordsstriped jack / Scytalidium sp / Ochroconis humicola / histopathology / systemic mycosis / Optimal temperature / protease / MIC
Research Abstract

Scytalidium infection was found in striped jack (Pseudocaranx dentex) with systemic mycosis. Ochroconis humicola was also isolated from the lesions. The external clinical signs were blackish patches and ulcers formed on the surface, especially at the base of the dorsal fin, at the tip of the snout, and the anal area. Inoculation experiments on striped jack revealed that these fungi were the causal agent of the mycosis. However, the pathogenicity of the Scytalidium sp. appeared stronger than that of the O. humicola from the histopathological findings. Optimal temperature of S. sp. K2 was 24゚C, but no growth showed at under 8゚C and over 35゚C. From the results, the fungus was thought to be safe to humans. Histopathologically, necrosis and fusion of muscle fibers were observed in the muscles of fish used for artificial infection tests. This shows protease from the fungi is produced in the muscle. It was thought that the protease was a very important enzyme to make the lesions. The effects of some drugs on the Scytalidium sp. K2 were tested in vitro, but no effective drugs were found.

URL: 

Published: 1994-03-24  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi