Composting manure in the poultry farm harbours multidrug-resistance Salmonella

Salmonella is one of the leading foodborne pathogens that cause gastroenteritis. It is imperative to monitor Salmonella contamination within poultry farms. This study focuses on the prevalence of Salmonella in composting manure at poultry farms a potential and persistent contamination sources. A batch of manure samples (n = 10) were collected from a local poultry farm, and half of the manure samples were detected to be Salmonella-positive. Serotyping results showed four serotypes among different isolated strains, including Typhimurium, Typhi, Newport, and Dublin. Isolates from manure generally demonstrated a high ciprofloxacin resistance and biofilm formation capacity. Multi-drug resistance was found in isolates from organic manure that had been fermented using high-temperature aerobic technology. Our study indicated that composting manure harboured Salmonella and might facilitate the transmission of Salmonella and the development of antimicrobial resistance. Proper composting strategies are needed to reduce the transmission of antimicrobial resistance and Salmonella.