Estudio microbiológico en las leches de vaca de consumo humano en las parroquias Tarqui y Victoria del Portete del Cantón Cuenca-Ecuador. 2007

Abstract

Methodological Design: A descriptive study was made, with a representative and randomized sam - ple, made up by 100 samples of industrialized milk and 200 samples of milk from buckets. These samples were applied to Blood Agar and Mac Conkey’s Agar. The bucket samples were collected at two different times: fist at post-milking and the second at noon during the milk’s delivery in the city of Cuenca. This was done to determine the bacterial growth between two times. A survey was conduced in the city of Cuenca to know if there is any relation between the milk buyer’s level of education and the type of milk they con - sume. The analysis of the results was computed using SPSS 15 software and Excel. Results: In the different growth mediums the level of contamination was from 66% to 70%, corresponding almost entirely to the samples of the bucket milk. The positive results of the morning samples were of 68-82% and of the noon samples of almost 100%, with more than 100000 CFU, showing a significant increase in the levels of contamination. The most common microorganism were the Staphylococcus aureus and the Escherichia coli . Finally the people with lower level of education were the ones that preferred to consume milk sold from buckets. Conclusions: The levels of contamination in milk for human consumption were high, almost exclu - sively related Objective: To determinate the microbial contamination of cow milk for human consumption in the parishes of Tarqui and Victoria del Portete, located in the district of the city of Cuenca.to bucket milk, in the parishes of Tarqui and Victoria del Portete. Plus, the longer milk was exposed to polluting factors, the greater was its level of contamination. The isolated bacteria were pathogenic to humans orally. And the lower the level of education of the people, the more the consumed milk with low health standards, bucket milk.