Bacterial Infestation in Different Fish at Rajshahi

Abstract

The present study was carried out from July 2005 to June 2007 and diseased freshwater fishes were collected from different water bodies and fish landing centre of three study areas, namely City Corporation area, Rajshahi; Paba upazila and Charghat upazila, Rajshahi. In the present study the load of bacteria in lesion, liver and kidney of H. molitrix showed considerable variation in different months during the study period. Monthly variation of bacterial load in body lesion varied from 3.17×10⁴ CFU/g (July05) to 2.13×10⁷ CFU/g (March07), in liver it varied from 7.17×10³ CFU/g (July05) to 5.13×10⁶ CFU/g (March06) and in kidney it varied from 5.87×10³ CFU/g (July05) to 6.33×10⁵ CFU/g (March06). From two years observation, monthly variation of bacterial load in 3 sampling ponds were varied from 4.00×10⁶ CFU/ml (June07) to 3.93×10⁷ CFU/ml (July05) in case of pond-1. In pond-2 bacterial load varied from 1.27×10⁶ CFU/ml (May07) to 5.33×10⁷ CFU/ml (September06). In pond-3 the bacterial load varied from 2.10×10⁶ CFU/ml (June07) to 2.10×10⁸ CFU/ml (July06).

DOI: http://dx.doi.org/10.3329/jsf.v9i1-2.14650

J. Sci. Foundation, 9(1&2): 77-84, June-December 2011