Bacterial Abundance In Indian White Shrimp, Penaeus Indicus Collected From Two Different Market Conditions Of Dhaka City

Abstract

A study was accomplished in regard to the microbiological abundance in the muscle of Indian White Shrimp (Penaeus indicus) collected from three departmental chain shops and three local markets of Dhaka metropolitan city has been assessed in terms of total bacterial count (TBC), coliform and Salmonella? Shigella (SS) counts. The TBC ranged from 2.1 ± 0.20 × 10⁴ to 4.7 ± 0.50 × 10⁵ cfu/g for departmental shop frozen shrimp and 4.2 ± 0.45 × 10⁶ to 1.3 ± 0.50 × 10⁸ cfu/g for local market iced shrimp. The total coliform count ranged between 1.6 ± 0.20 × 10² and 2.1 ± 0.25 × 10³ cfu/g for the chain shop frozen shrimp and 2.8 ± 0.30 × 10³ and 7.8 ± 0.50 × 10⁵ cfu/g for the retail market iced shrimp. Furthermore, the Salmonella?Shigella (SS) count for chain shop frozen and local market iced shrimp varied from 0.5 ± 0.0 × 10² to 1.3 ± 0.10 × 10² cfu/g and 0.7 ± 0.0 × 10² to 2.1 ± 0.25 × 10² cfu/g, respectively. Presence of Vibrio spp. was confirmed in 11 samples (5 from departmental shops and 6 from local markets). In case of antibiotic sensitivity pattern of the indicator and pathogenic isolates, all of them were resistant to penicillin and bacitracin. Most of the isolates were sensitive to streptomycin, chloramphenicol and kanamycin. The results confirmed that the samples of local markets contained high pathogenic bacterial load which are supposed to be threat to food safety creating food borne diseases.

DOI: http://dx.doi.org/10.3329/dujbs.v21i1.9741

DUJBS 2012 21(1): 29-38