Bacteriological Quality of Marketed Mola Fish, Amblypharyngodon Mola From Dhaka Metropolis

Abstract

The bacteriological quality of mola fish (Amblypharyngodon mola) from three local fish markets as fresh and as frozen from three departmental chain shops of Dhaka metropolis were analyzed. The microbial quality parameters varied with different sources and the quality was found to be poor for local market fish samples. In total 24 samples were considered for bacteriological quality analysis and 10 pathogenic isolates for antibiotic sensitivity test to 12 antibiotics. The total bacterial count ranged from 1.8 ± 0.25×10⁴ to 6.5 ± 0.75 × 10⁶ cfu/g for fresh and 5.5 ± 0.55 × 10³ to 7.0 ± 0.80 × 10⁵ cfu/g for frozen mola. The highest total coliform count of mola was 8.0 ± 0.55 × 10⁴ and 6.1 ± 0.40 × 10³ cfu/g for local market and departmental chain shop, respectively. All fresh and frozen samples were observed having high quantity of E. coli above 102 cfu/g. Furthermore, Salmonella-Shigella was identified in 67% samples (75% of fresh and 58% of frozen  samples) varied from 0.9 ± 0.00 ×10² to 5.3 ± 0.30 × 10³ cfu/g whereas Vibrio spp.was confirmed in 79% samples (83% of fresh and 75% of frozen samples) of which  90% samples exceeded 102 cfu/g. Similar pattern was observed in Staphylococcus spp. with 83% of fresh and 58% of frozen samples (63% of total samples) beyond 103 cfu/g. In case of antibiotic sensitivity pattern of the indicator and pathogenic isolates, all of them were resistant to amoxicillin and penicillin. Most of the isolates were sensitive to bacitracin, ciprofloxacin, erythromycin and streptomycin. The findings proved that mola fish under this study was more or less  contaminated and local fish market samples were highly privileged with food borne pathogens which confirmed the unhygienic condition of the market as well as the  presence of antibiotic resistance bacteria in mola fish may threat to public health safety.

DOI: http://dx.doi.org/10.3329/bjz.v40i1.12897

Bangladesh J. Zool. 40(1): 77-88, 2012