International Journal of
Fisheries and Aquaculture

  • Abbreviation: Int. J. Fish. Aquac.
  • Language: English
  • ISSN: 2006-9839
  • DOI: 10.5897/IJFA
  • Start Year: 2010
  • Published Articles: 233

Full Length Research Paper

Oomycete infections in freshwater fishes

S. A. Mastan*, M. Radha Krishna Reddy and D. Sri Lakshmi
Post-Graduate Department of Biotechnology, D. N. R. College, P. G. Course and Research Centre, Bhimavaram, 534202 W. G. (Dt.) Andhra Pradesh, India.
Email: [email protected]

  •  Accepted: 09 May 2012
  •  Published: 31 October 2012



Mycological studies were carried out on fishes with fungal infection. A total of seventeen isolates of fungi were obtained from diseased fishes which belongs to five species namelySaprolegnia diclina, Saprolegnia ferax, Saprolegnia hypogyana, Saprolegnia parasitica andAchlya americana. All these fungi were isolated from six different species of fishes viz.Channa striatus, Channa punctatus, Clarias batrachus, Labeo rohita, Heteropneustis fossilis and Mystus cavasius. The parasitic ability of all the seventeen fungi was confirmed by conducting pathogenicity tests under laboratory conditions using healthy fishes of the same species. All the species of fungi were found to be pathogenic to fish, but Saprolegnia parasitica was more virulent showing infection within eight hours.


Key words: Oomycetes infection, pathogenicity, freshwater fishes.