Abstract

To evaluate the impact of the antibiotic use in poultry and the development of the resistance in the gut microflora of broiler. Microbiological methods were used to investigate the susceptibility of ten lactobacilli stains isolated from digestive tract of broiler. The isolates were tested against the ten most used antibiotics in veterinary and human medicine in Algeria. The isolates exhibited high resistance to all antibiotics tested in the range 70 to 100%. The minimal inhibitory concentrations (MIC’s) also were evaluated for each isolates. Lactobacilli of broiler’s microflora are a reservoir of resistance genes able to dispread the antibioresistance phenomenon through the food chain and the environment. Further studies need to be performed to understand the mechanisms and the causes responsible for this phenomenon. This study shows the need to find alternatives and emergency measures to avoid repercussions on public health.

Key words: Lactobacilli, antibiotics, resistance, broiler, microflora.