Abstract

The spread of antimicrobial resistance in the Enterobacteriaceae family represents a major global problem for human and animal health. The aim of this study was to determine the levels of antimicrobial resistance and to highlight the different resistance profiles in Enterobacteriaceae strains isolated from the feces of healthy broiler chickens, collected from several poultry farms located in the Souk Ahras region (northeastern Algeria).
Antimicrobial susceptibility testing was conducted using the disk diffusion method in accordance with the Clinical and Laboratory Standards Institute guidelines. Determination of colistin sensitivity (MIC) was carried out using the broth microdilution method.
Three hundred fifty-five isolates of commensal Enterobacteriaceae were recovered, including: Escherichia coli (288 ; 81.13%), Proteus mirabilis (27 ; 7.61%), Salmonella spp. (12 ; 3.38%), Escherichia fergusonii (12 ; 3.38%), Serratia spp. (6 ; 1.69%), Klebsiella pneumoniae (5; 1.41%), Enterobacter cloacae (4 ; 1.13%) and Kluyvera spp. (1 ; 0.28%).
The Enterobacteriaceae isolates showed very high rates of resistance to erythromycin (100%), doxycycline (96.62%), trimethoprim-sulfamethoxazole (92.96%), ciprofloxacin (94.37), ampicillin (92.39%), kanamycin (75.77%) and amoxicillin-clavulanic acid (67.04%). However, low resistance rates were observed for ceftazidime (10.98%) and cefotaxime (9.58%). A significant resistance rate was observed for colistin (24.79%). 99.70% of isolates were multidrug- resistant (MDR) and only two extended-spectrum beta-lactamase (ESBL) producing E.coli isolates were detected. Fifty three antimicrobial resistance (AMR) patterns were identified, showing a wide diversity of resistance, with combinations ranging from two to ten antibiotics.
These results reveal alarming rates of antibiotic resistance, underlining the need to take measures to combat the phenomenon of antibiotic resistance in order to protect animal and public health.
Key words: Antibiotic sensitivity, Enterobacteriaceae, Broiler chicken, Souk-Ahras.

Information

Item Type:	Thesis
Divisions:	» Laboratory of Science and Techniques for Living » Institute of Agricultural and Veterinary Sciences
ePrint ID:	5450
Date Deposited:	2025-07-09
Further Information:	Google Scholar
URI:	https://old.univ-soukahras.dz/en/publication/article/5450

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