Survey, isolation and identification of bacterial diseases of fresh water fishes in district Hisar, Haryana
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Date
2005
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Publisher
CCSHAU
Abstract
The present investigation was carried out to identify fish
pathogens causing fish diseases in catla, rohu, mrigal, common carp, puthi and
magur. A number of biochemical tests were carried out for identification of
bacterial fish pathogens. The bacterial diseases were identified viz. epizootic
ulcerative syndrome, fin and tail rot, hemorrhagic septicemia and vibriosis in three
selected fish farms (Mirka, Satrod and SLR, Hansi) from July 2004 to March 2005.
These diseases were reported in July, August, October and November. No disease
was found in September, December, January, Febuary and March. Ten gram
negative ( Aeromonas hydrophila, Enterobacter cloacae, E. gergoviae,
Pseudomonas sp., P. pseudomallie, Klebsiella pneumoniae subsp.
aerogenes, Providencia sp., Serratia marcescens, Vibrio anguillarum, V.
alginolyticus) and two gram positive (Micrococcus roseus, Streptococcus gp Q1)
bacterial pathogens were identified from infected fishes. In EUS, fungal hyphae
were found penetrating deep into muscles in catla. In fish farm of Satrod, vibriosis
was reported in magur. The bacterial pathogens (Vibrio anguillarum, V.
alginolyticus) were isolated from the skin lesions. These bacteria are generally
found in marine, brackish and rarely in fresh water. Deviation of optimal range of
hydrobiological parameters led to infection in fishes resulting in to disease
outbreaks.