Control of Listeria monocytogenes and Staphylococcus aureus isolated from chicken meat and chicken products by dipping in some organic acid solutions.

摘要

Fresh chicken boneless meat samples were collected from different shops and markets at Sharkia Governorate, Egypt. All samples were examined for the presence of Listelia monocytogenes and S. aureus by the standard microbiological procedures. S. aureus was isolated from 48 (34.3%) samples out of 140 examined thigh muscle samples with the mean count of 7.8x103+or-2.1x10 CFU/gm., and from 91 (50.6%) out of 180 examined breast muscle samples with the mean count of 2.4x103+or-0.7x102 CFU/gm. L. monocytogenes was isolated from 16 (11.4%) samples out of 140 examined chicken thigh samples with a mean of 2.3x102+or-0.7x10 CFU/gm., and from 33 (18.3%) samples out of 180 examined chicken breast samples with a mean count of 0.9x102+or-0.2x102 CFU/gm. The antimicrobial susceptibility patterns of the tested microorganisms showed that resistance of S. aureus for antibiotics ranged from 12.9% (Kanamycin) to 40.3% (Chloramphenicol), while; that of L. monocytogenes antibiotics varied between 14.3% (Erythromycin) and 100% (Colistin sulphate). This study shows the importance of S. aureus and L. monocytogenes as two risky food-borne pathogens contaminating chicken meat; therefore, regular testing of chicken meat for these pathogens is essential for improving the quality of products supplied to the consumer, controlling the hazards in poultry products and enhancing food safety.