Control of Enteric Bacteria in Poultry

Abstract

Salmonellosis in poultry is an important area of study as it not only affects the poultry industry but can also occur in humans. The increasing antibiotic resistance of Salmonella led to growing interest in using natural antibacterial compounds, such as extracts of spices and herbs. In this study, multidrug resistance genes qnrS and aac (6′)-Ib-cr positive S. Enteritidis and S. Typhimurium were isolated from chicken organs and muscle. The methanolic extracts of five spices (Alhagi maurorum, Conyza dioscoridis, Coriander sativum, Caracuma longa and Cuminum cyminum) were shown to have an inhibitory effect against Salmonella. Antibacterial activity of these plants extract was evaluated against isolated Salmonella serovars using minimum inhibitory concentrations. Conyza dioscoridis was the most effective extract retarding microbial growth of Salmonella Enteritidis, while other plant extracts showed variable antimicrobial activity. Keywords: Samlomella, antimicrobial, plant extracts, resistance genes.