ISSN: 1813-0410

Author : A. Al-Imarah, Eman

Distribution of some aerobic bacteria in an infected Cyprinus carpio L. fish farm in Basrah and its resistance to antibiotics

Eman A. Al-Imarah

journal of kerbala university, Volume 4, Issue 2, Pages 209-215

During April 2004, 30- carp male infected fishes and 25 water samples from fish farm ponds in Basrah city were collected. swabs were taken from: under scales , gills , air sac , intestine , spleen , liver , heart , gonads , and kidney. Both samples were tested for bacteria. The following Gram-negative bacterial species were isolated from all samples: Pseudomonas fluorescence (41isolates),Aeromonas hydrophila (28 isolates), Escherichia coli (27 isolates),Klebsiella pneumoniea (21 isolates), Pseudomonas sp.(18 isolates), and Proteus vulgaris(17 isolates). Pseudomonas fluorescence was the dominant among Gram- negative bacterial species isolated from fish samples while Escherichia coli was the dominant among Gram- negative bacterial species isolated from water samples. The Gram- positive bacterial species which isolated from all samples were: Staphylococcus aureus(31 isolates),Sterptococcus faecalis (25 isolates), S.faecium(19 isolates) , Staphylococcus epidermidis(11 isolates), and S.pyogenes(11 isolates). Numbers of Gram- negative bacterial species that isolated from all samples were greater than those of Gram-positive bacterial species. The Minimum Inhibitory concentrations (MICs) for 10 isolates of each bacterial species were determined; Gram- negative bacterial species showed more antibiotic resistance than Gram-positive bacterial species