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MICROBIOLOGICAL QUALITY OF RAW COW’S MILK COLLECT FROM COMMERCIAL ESTABLISHMENTS IN THE CITY OF PETROLINA, PERNAMBUCO, BRAZIL
Emanuel Sinério Ferreira Leite
Ciências Farmacêuticas / UNIVASF / Universidade Federal do Vale do São Francisco
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EDIBLE INSECTS AS POTENTIAL SOURCE OF ALTERNATIVE PROTEINThe sale of drinking raw milk is still very common in several countryside cities of Brazil. The lack of monitoring by regulatory agencies, the milking, storage and inadequate thermal treatment in the consumption of raw milk can present health risks from contamination by a variety of pathogenic microorganisms. The aim of this study was to analyze the microbiological quality of raw cow's milk sold in the city of Petrolina, PE. All data obtained were compared with current legislation regarding raw milk. Twenty-one samples of raw milk were collected from commercial establishments from seven regions and transported in accordance with regulatory instructions. The samples were analyzed by methylene blue reductase test (TRAM) and for the counting of mesophilic, psychrotrophic and coliforms. Isolates of Escherichia coli, Salmonella spp. and Staphylococcus aureus were performed by phenotypic methods. Amongst all 21 samples tested, 28.6% were positive to TRAM indicating high microbial load. On the basis of guidelines number 76 (Brazilian Ministry of Agriculture) for raw milk entering production, 37% of samples exceeded the aerobic mesophilic bacteria limits and 57% were in disagreement for the presence of psychrotrophs. A total of 100% raw milk samples were positive for total coliforms (NMP/mL 9.2 to >1100) and 95.8% for fecal coliforms (NMP/mL >2). For the presence of food quality indicators, E. coli was present in 17 milk samples (85%) and three of the 21 raw milk samples were positive for Salmonella spp. (14,3%). S. aureus was isolated from 8 samples (38%). The results point to unsatisfactory hygienic and sanitary conditions of the product and alerts to the possible transmission of diseases and toxin-infection transmitted to this food. These results show the public health risk associated with consumption of this product and reinforce the importance of continuous inspection in the marketing of raw drinking milk.
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