Análisis microbiológico de carnes molidas expendidas en el mercado San Alfonso de la ciudad de Riobamba

Abstract

The present research work aimed to perform the microbiological analysis of ground meats sold in the "San Alfonso" market in Riobamba city, through a study with non-experimental design, mixed type, and field. The study population consisted of seven samples in triplicate of ground beef from the "San Alfonso" market and a sample from a supermarket where the microorganisms Escherichia Coli, total coliforms, Staphylococus aureus, and Salmonella, present in ground beef, were analyzed. As a result, the samples did not comply with the microbiological quality limits of the NTE INEN 134. When evaluating Escherichia coli greater growth was observed in sample 1 with 2.00E + 05 colony forming units (CFU), due to contamination in the dispensers, with respect to total coliforms was observed higher prevalence in sample 1 with 8.00E + 06 CFU, which may be due to fecal contamination, in the case of mesophilic aerobes higher prevalence was observed in sample 5 with 43, 47E+06 (CFU) due to the lack of hygienic conditions, when analyzing Staphylococus aureus a higher prevalence was observed in sample 5 with 43.47E+06 CFU and in the case of Salmonella spp., a positive result was obtained when found in 57.14% of the samples. It was concluded that the samples of ground beef analyzed do not meet the microbial quality parameters that govern the standard for meat and meat products, as there is a high concentration of pathogenic bacteria. It is recommended that regulators carry out greater control of the quality of meats sold in the markets of Riobamba city.