Microbiological and physicochemical evaluation of the pasteurized milk stemming from dairy from COMCAM region

Resumo

Microbiological and physicochemical analyses are important parameters to determine the shelf life and food safety. The aim of this study was to evaluate the microbiological and physicochemical parameters of 101 samples of pasteurized milk collected from dairies located in COMCAM region, Brazil. For microbiological analyzes, coliforms at 35°C and 45°C, and mesophilic aerobic bacteria counts were performed. The physicochemical parameters investigated were alkaline phosphatase, peroxidase, and cryoscopic index. According to the results, 21% of the samples were above the limit established by the Brazilian legislation for mesophilic bacteria counts, and 1% for coliform counts at 45°C. For the physicochemical parameters, the analyses of peroxidase and cryoscopy index were not in accordance for 2% and 17% of the samples, respectively. The microbiological and physic chemical results showed that the quality conditions of some pasteurized milks was not adequate, possible due errors during their handling, processing and storage. These factors could result in potential health risks for consumers.