Bacterial load in twelve freshwater fishes of four feeding habits in Bangladesh

Authors

  • M Shamsur Rahman Department of Fisheries, University of Dhaka, Dhaka
  • Mahmud Hasan Department of Fisheries, University of Dhaka, Dhaka
  • Zahid Hayat Mahmud International Centre for Diarrhoeal Disease Research, Bangladesh (ICDDR,B), Mohakhali, Dhaka
  • M Sirajul Islam International Centre for Diarrhoeal Disease Research, Bangladesh (ICDDR,B), Mohakhali, Dhaka

DOI:

https://doi.org/10.3329/dujbs.v19i2.8956

Keywords:

Bacterial load, Freshwater fishes, Feeding habit

Abstract

Homogenized samples of skin, gill and gut of twelve freshwater fishes of four feeding habits were used for bacteriological test. Total bacterial count (TBC), total coliform (TC), faecal coliform (FC), faecal streptococci (FS) and total Vibrio?like colonies were enumerated using serial dilution and spread plate techniques. Variation of bacterial loads among the fishes of various feeding habits was insignificant. The TBC, TC, FC, FS and total Vibrio counts ranged from 1.72 ± 0.68 × 108 to 7.00 ± 3.39 × 108, 2.49 ± 1.72 × 106 to 6.55 ± 3.00 × 106, 1.58 ± 1.29 × 106 to 2.76 ± 1.42 × 106, 4.83 ± 2.09 × 104 to 1.19 ± 0.46 × 105 and 2.06 ± 0.67 × 103 to 3.68 ± 2.02 × 105, respectively among various feeding groups. However, gill and gut had significantly higher density of TBC, TC and FC than that of the skin. High counts of indicator organisms indicate that market fishes of all varieties could be the potential reservoirs in transmission of pathogenic bacteria responsible for diarrhoeal disease.   

Key words: Bacterial load; Freshwater fishes; Feeding habit

DOI: http://dx.doi.org/10.3329/dujbs.v19i2.8956

DUJBS 2010; 19(2): 145-150

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How to Cite

Rahman, M. S., Hasan, M., Mahmud, Z. H., & Islam, M. S. (2011). Bacterial load in twelve freshwater fishes of four feeding habits in Bangladesh. Dhaka University Journal of Biological Sciences, 19(2), 145–150. https://doi.org/10.3329/dujbs.v19i2.8956

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