Occurrence of bacterial pollution indicators in Boulti (Tilapia nilotica Linn.) fish

Abstract

A study was made for the occurrence of coliform and streptococcal groups on the skin surface (32 samples), gills (32 samples), intestinal tract (4 samples) and raw fish flesh (4 samples) and raw fish flesh (4 samples) of Boulti fish (Tilapia nilotica Linn.), a fresh water fish caught from Nasser's Lake in Aswan. Streptococcus group was detected in 13 samples taken from fish surface, 12 samples out of 32 swabs from gills. All intestine samples and raw fish flesh were positive for the streptococcus group. Coliform organisms were detected at nearly 43% of skin or gill samples, 100% of intestine and raw fish flesh samples.

Culture-dependent bacteria in commercial fishes: Qualitative assessment and molecular identification using 16S rRNA gene sequencing

“…Vibrios are dominant bacterial species in sewage discharges and have been linked with foodborne diseases, including pandemic diarrhea outbreaks (Austin, 2010). Total coliform, E. coli and vibrio in fish have been considered as indicator of bacterial contamination (Adebayo-Tayo et al, 2011, Akinyemi and Buoro, 2011, El-Zanfaljz and Ibrahim, 1982, Jha et al, 2010). We noted higher bacterial counts in M. cephalus (locally called arabi ), especially from Area I, on TCBS (all body-parts), Mac (gills, muscle and gut) and EMB (gills and muscle).…”