Diagnóstico da qualidade higiênico-sanitária de leite cru destinado a um laticínio do Recôncavo da Bahia

Abstract

The objective of this study was to carry out a diagnosis of the hygienic-sanitary quality of raw milk, cooled or not, destined to a dairy for the manufacture of dairy products. Samples were obtained by collecting milk from all dairy supply properties in the Recôncavo da Bahia (nine properties). Samples were obtained using sterilized screw vials. For each property, three replications were done, with a four-day interval between them. After collection, the samples were kept in an isothermal box containing recyclable ice, and sent to the LCAA of the CCAAB of UFRB. In order to perform the microbiological analysis, culture media were used: Levine agar (EMB), Bile-Esculin agar and Baird-Parker agar enriched with egg yolk. All the properties analyzed in this experiment had a SCN count, with a mean maximum count of 5,173 log CFU / ml. The milk samples collected at the farms presented SCP counts lower than those established by IN51 (7 log CFU / ml). The present study showed that more than half of the analyzed properties (55.55%) had samples of milk contaminated by E. coli, with a maximum mean count of 5,751 log CFU / ml. For bacteria of the genus Enterococcus spp., There were growth of these microorganisms in 88.88% of the samples analyzed. It was observed that in spite of having found the presence of pathogenic bacteria in the sample analyzed, the milk was suitable for the production of derivatives, since the bacterial count was within the standards established by the legislation in force. It is important to review the acceptance patterns of these microorganisms, in order to avoid outbreaks of toxinfection in people who will consume milk and derivatives.