Bacteriological quality of raw cow milk in Shahrekord, Iran

Abstract

Aim: The aim of this study was to evaluate the rate of contamination with Escherichia coli, coliforms, and Staphylococcus aureus in raw milk from Shahrekord city, Iran. Materials and Methods: In this study, 300 raw milk samples were collected randomly from five regions, namely northeast, east, southeast, south, and southwest regions of Shahrekord city according to stratified random sampling design. Samples were analyzed for Total plate count (TPC), Staphylococcus aureus, coliform, and E. coli. Results: Out of 300 samples of raw milk, contamination with coliforms, E. coli, and S. aureus was observed in 237 (79%), 207 (69%) and 125 (41.66%) samples, respectively. The highest rate of contamination was in the samples from southwest region with coliforms, E. coli, and S. aureus were present in 30 (100%), 29 (96.66%), and19 (63.33%) samples, respectively (p<0.05). Conclusions: Considering the high rate of raw milk contamination with S. aureus, E. Coli, and coliforms, sanitary practice during collecting, transporting, and storage especially in the summer season is recommended.

Keywords

• bacteriological quality
• contamination
• raw milk