Escherichia coli O157, Staphylococcus aureus and coliforms in crude and processed bovine milk marketed

Abstract

Fifty-five (55) samples from five municipalities in the Recôncavo from Bahia region were analyzed between May and July 2015 to evaluate the sanitary quality and the presence of pathogens of crude and processed bovine milk samples. Psichrotrophic, mesophilic and thermophile rates and the count of Escherichia coli, E. coli O157: H7 Staphylococcus aureus and Listeria monocytogenes were done by microbiological methods rapid detection. There was a greater contamination and presence of pathogens in the raw milk when compared to processed milk. However, total coliforms were detected in 14.28%, E. coli in 7.14% and E. coli O157: H7 in 2.04% of processed milk. The enforcement by authorities against the illegal sale of raw milk and the monitoring of steps in milk production up to marketing should be mandatory.

Prevalence of Staphylococcus aureus and Antimicrobial Susceptibility Test in Milk and Cheese from Hadman Farm Dairies

“…Current analysis revealed ( Table 1 and 2) that all raw milk samples contained CPS, with the levels ranging between 4.5 and 6.2 log cfu mL -1 , corroborating most studies on CPS in raw milk conducted during the last decade (D'Amico and Donnelly, 2010;Barros et al, 2011a,b;Jakobsen et al, 2011;Walcher et al, 2014;Sandes et al, 2016;Santos et al, 2016;Mehli et al, 2017), with a prevalence ranging between 47.2% and 94.3%.…”

“…In corroboration to observations by others researchers (Rosengren et al, 2010;Barros et al, 2011a,b;Sandes et al, 2016;Santos et al, 2016;Mehli et al, 2017) the quality of milk common to human consumption has always been a search of researchers and competent authorities for their nutritional importance, social health and public health, since milk with poor microbiological quality can lead to economic losses and risks to consumer health. In Brazil, a larger dairy farm, low technology, lack of control hygiene, generating a product of low quality.…”

“…The minimum amount of enterotoxin necessary to cause the disease is not known, but the ingestion of, at least less, 1 µg of toxin in 100g of food already induces the appearance of clinical symptoms and this level of toxin is reached when the population of S. aureus exceeds 10 5 per gram and the dose minimum of enterotoxins ingested for the occurrence of these symptoms is lower, of 10 ng (Peles et al, 2007;Even et al, 2010;Barros et al, 2011a,b;Hennekinne and Loir, 2014;Sandes et al, 2016;Santos et al, 2016;Mehli et al, 2017).…”

“…In fact, in Brazil, the microbiological quality of raw milk produced in several regions of the country is poor, with high concentrations of microorganisms that indicate hygienicsanitary conditions such as mesophiles and thermotolerant coliforms and Staphylococcus aureus. Food of animal origin, especially milk and milk products, associated with outbreaks of food poisoning, public health problem and S. aureus, since it is the main etiological agent of bovine mastitis, turns raw milk into a large vehicle of these outbreaks (Peles et al, 2007;Barros et al, 2011a,b;Hennekinne and Loir, 2014;Rajic-Savic et al, 2015;Sandes et al, 2016;Santos et al, 2016).…”

“…However, most dairy farms in Brazil and in developing countries technology, deficiency in animal health control and hygiene, generating a known product of low quality. Milk is naturally a nutrient-rich culture medium, which makes it susceptible to attack by a large number of microorganisms in the environment, of the animal itself, of the man and of the utensils used (Barros et al, 2011a,b;Hennekinne and Loir, 2014;RajicSavic et al, 2015;Sandes et al, 2016;Santos et al, 2016;Mehli et al, 2017). In fact, in Brazil, the microbiological quality of raw milk produced in several regions of the country is poor, with high concentrations of microorganisms that indicate hygienicsanitary conditions such as mesophiles and thermotolerant coliforms and Staphylococcus aureus.…”