Análisis microbiológico de quesos comercializados en el mercado mayorista san pedro de Riobamba

Abstract

This research aimed to determine the quality, safety, and safety of cheeses sold in the San Pedro de Riobamba wholesale market. 5 samples (cheeses of different brands) and a control sample (Kiosko cheese) were collected in triplicate, following the provisions of the NTE INEN 0004 standard for sampling, the NTE INEN 1528 standard for microbiologist analysis, and the NTE INEN 1334 standard to analyze the labeling of these products. The analysis was performed in Petrifilm 3M dishes, to determine Enterobacteria, Escherichia coli, Staphylococus aureus, the procedure was carried out by a dilution 10-4 that was inoculated and incubated after proceeding with the counting and calculation of colony forming units (CFU), in addition, a Check List was made for the analysis of labels. As a result, it was obtained that the samples present 9x105 CFU / g of Enterobacteria, 2x105 CFU / g of Escherichia coli, and 9x105 CFU / g of Staphylococus aureus, and in the labeling only present 70 or 80% compliance, so the samples are not within a maximum permissible index for a fresh cheese to be of good quality, In addition, they do not meet all labeling parameters. It was concluded that the samples are not suitable for consumption since they are a danger to consumers, in addition, it is shown that the cheeses have a poor production and storage chain. It is recommended that the relevant authorities carry out better control of the products that are marketed in this market, with training that improves the hygiene, quality, and safety of these products.