Detecção de microorganismos utilizando a técnica de pcr em sequências palindrômicas extragênicas repetidas (REP-PCR) no monitoramento da qualidade do leite de cabra em sala de ordenha

Abstract

The present study was carried out, with the objective of applying the PCR technique in repetitive extragenic palindromic (REP-PCR) sequences in the monitoring of the quality of goat milk, through the detection of Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa and Streptococcus spp., in samples of milking handlers, goats teats, milk, milk machine and water, for the future establishment and implantation of the system of Hazard Analysis Critical Control Points (HACCP). Several fingerprints was verified of all the isolates collected of the different studied sources (milking handlers, goats teats, milk, milk machine and water). It was observed very similar behaviors of the bands indicating that the isolates can be related as epidemic clones. The water without treatment, used for the wash milking handlers, it was characterized as a critical point of control (PCC), because stands out as starter contamination in the Streptococcus spp., Escherichia coli and Pseudomonas aeruginosa samples. Another PCC would be the hands of the milking handlers, because in the Staphylococcus aureus samples, it is also appears as initial point of contamination. The technique demonstrated to be efficient for the similarity analysis among individuals of the same species, in case, of the Staphylococcus aureus, Streptococcus spp., Escherichia coli and Pseudomonas aeruginosa, being, therefore, an useful tool for investigation of fails on management and consequently, in the search of more efficient control to avoid or to minimize the spread of pathogenic microorganisms that cause serious illnesses in humans and animals, and can be transmitted through products as the milk and your products.