BACTERIOLOGICAL ANALYSIS OF CATFISH (Clarias gariepinus) IN OWO AREA, ONDO STATE, NIGERIA
Abstract
A total of eight catfish (Clarias gariepinus) were collected from different fishponds in
Iyere and Otapete areas of Owo local government in Ondo State. The skin, gills, and
intestines of the fish were investigated for presence of bacteria. The species of bacteria
isolated from the fish samples and their percentage occurrence include Serratia spp.
(2%), Salmonella spp. (32%), Escherichia coli (24%), Proteus spp. (3%), Enterococcus
spp. (7%), Staphylococcus spp. (9%), Streptococcus spp. (9%), Klebsiella spp. (3%),
Bacillus spp. (6%) and Pseudomonas spp. (5%). The highest microbial count (total viable
count) from Clarias gariepinus was 6.5 x 102 CFU/ml from skin samples, 3.5 x 107
CFU/ml from gill samples, and 4.5 x 102 CFU/ml from intestine samples.
Correspondingly, the highest microbial count (total coliform count) recorded was 7.0 x
102 CFU/ml from skin samples, 2.5 x 103 CFU/ml from gill samples, and 3.0 x 101
CFU/ml from intestine samples. Finally, the highest microbial count (total anaerobic
count) from Clarias gariepinus was 2.0 x 102 CFU/ml from skin samples, 2.5 x 104
CFU/ml from gill samples, and 2.5 x 102 CFU/ml from intestine samples. The occurrence
of such isolated bacteria if not properly checked could endanger both the fish and the
ultimate consumers particularly if the fish harvested from these farms are undercooked.
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