Identificación bacteriológica de muestras de leche cruda y de superficies en una planta de procesamiento de productos lácteos.

Abstract

The microbiological quality of raw milk and contact surfaces play a determining role in the quality of the products, being directly related to the generation of foodborne diseases that could be affecting food safety. The objective of this project was based on characterizing the bacteria in raw milk and on the surfaces of a dairy processing plant. For this, a total of 20 samples corresponding to raw milk and swabs from surfaces between equipment, silos and gutters were collected, from which 43 strains were isolated where a prevalence of 40% of pathogenic microorganisms was found, 35% of indicators, 9 % of spoilers and 14% between environmental and human microbiota, concluding that the present microbiota differs from the sampling site and that the thermal processes are being effective, however the presence of some pathogenic and spoilage microorganisms such as Pseudomonas aeruginosa, Pseudomonas fluorescens and Stenotrophomonas maltophilia, on surfaces that could later be a problem in finished products from the processing plant.