Effect assessment of carcasses washing stages and chiller on contamination rate of carcasses to Salmonella in industrial slaughterhouses of Khuzestan province abattoirs

Today , salmonella is one of the most important causes of food disease in the world. The purpose of this study was to evaluate the effect washing stages of carcasses and chiller in contamination rate of carcasses to Salmonella in industrial Slaughterhouses. In this study five carcasses were randomly sampled for each stage of the six stages of slaughter of poultry so from every slaughterhouse 30 carcass samples and total 180 samples were taken of 6 slaughterhouses which are active in the Khuzestan Province. After rinsing carcasses with peptone water medium of each carcass was prepared 100 ml sample (carcass rinses solation) which were sent to the laboratory for microbiological tests.In the research was determined Salmonella contamination In 65% (117 samples), tested carcasses were positive and in 35% (63 samples) negative. Salmonella contamination was determined in samples after Scalding 56.6%, after plucking 66.6%, before evisceration 60%, after evisceration 70%, before the chiller 63.3% and after the chiller 73.3%.The results showed significant effect washing carcasses in reduce contamination to Salmonella and the significant effect of the chiller (immersion) stage on increasing the carcass contamination with Salmonella.