بررسى شيوع سروتايپ هاى سالمونلا در گوشت مرغ و تخم مرغ و تعيين حساسيت آنتى بيوتيكى آن ها در شهر زنجان

Prevalence of Salmonella serotypes in poultry meat and egg and determine their antibiotic sensivity in Zanjan City

Food transmitted diseases are one of the main economic and hygienic problems in industrial and non-industrial countries. On the other hand, addition of antibiotic to the domestic animalsʹ food may lead to drug resistance in the Salmonella that may transmit to human through foods. Salmonellosis is the most common food poisoning around the world, and poultries especially hen and egg are the biggest reservoir of Salmonella. In this study, we examined 120 samples of the bulky and marked eggs and 120 samples of bulky and marked hens of Zanjan city in order for separation of different types of Salmonella. There were no bacteria inside the eggs, but from the shell of 68 eggs and from the 104 samples of hen, 56/6% and 86/6% of Salmonella types were isolated, respectively. The most prevalent Salmonella serotypes of the egg shell are S.enteritidis (23/3%), S.agona, and S.virchow (10%). But in hens the most ones are S.gallinarum (23/3%), S.agona, and 5. virchow( 13/3%). The most resistance to the antibiotics (erythromycin and colistin) was seen in the egg shell (about 100%) and the most sensitivity was observed against kanamycin, nalidixic acid and gentamicin (about 100%). In the hen, the most resistance was against erythromycin (92/3%) and the most sensitivity was to the gentamicin (88/5%).