ANTIBIORESISTANCE OF BACTERIA IN THE RIVERS OF THE NORTH EAST OF ALGERIA (I: CASE STUDY OF SAF SAF RIVER, THE REGION OF ELHARROUCH)Z. CHEKROUD AND F.Z. BOUZAOUIT
Our work is a contribution to the study of antibioresistance of some isolated bacterial strains in Saf Saf River, El Harrouch in the North East of Algeria. Four sites were chosen: the embouchure of the River with municipal wastes (site 1), the embouchure of the river with Oued Nssa (site 2), the middle of Saf Saf River (site 3) and the embouchure of the river with hospital wastes (site 4). The isolated bacterial strains were highly resistant to Amoxicillin and Cefazolin (80 and 98.8% respectively). On the other hand they were sensitive to Imipenem (100%). The mean scores of antibiotics were statistically significantly different (p < 0.0005). Otherwise, the mean scores of bacterial strains were not statically different (p=0.235). Pseudomonas strains were very resistant to Cefazolin and Cefoxitin (100%). There was no significant difference between the four sites (p=0.21). 83.34% of Pseudomonas strains were multiresistant. The rate of resistance of the isolated enterobacteriaceae reached 40.42%. High levels of Enterobacteriaceae resistance were recorded with Cefazolin (98.32%) and Amoxicillin (78.66%) followed by Colistin (66.34%) and Cefoxitin (63%). No significant difference between the means of antibioresistance of the enterobacteriaceae strains in the four sites (p=0.425). 60.68% of the enterobacteriaceae were multi resistant. Escherichia coli is the preferred indicator of faecal contamination. It was highly resistant to Cefazoline and Cefoxitine (91.63 and 75.02% respectively). No significant difference was observed between the four sites (P=0.124). 66.66% of the resistant E.coli strains were multiresistant with the highest percentages in the sites 2 and 4 (100% and 75% respectively).
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