METAGENOMIC INVESTIGATION IN COLONIAL CHEESE PRODUCED WITH PASTEURIZED MILK AND SOLD IN THE STATE OF RIO GRANDE DO SUL, BRAZIL
DOI:
https://doi.org/10.35172/rvz.2021.v28.475Keywords:
colonial cheese; metagenomic; inspection of animal origin products; public health.Abstract
Milk and dairy products are very susceptible foods to microorganism attacks. Its control in Brazil is submitted to Municipal, State or Federal Inspections, and verification of the hygienic-sanitary quality of food is an extremely important activity. This study used metagenomic analysis to investigate microbial genetic sequences in 12 brands of colonial cheese produced under different Public Inspection regimes and selled in two different municipalities in the state of Rio Grande do Sul. DNA from microorganisms belonging to four microbial Phyla have been identified: Acinetobacteria, Bacteroidetes, Firmicutes and Proteobacteria. Among the most relevant results, genetic sequences of pathogenic microorganisms or harmful to milk technology were evidenced, with Acinetobacter, Bacillus and Pseudomonas bacterias occurring in 100% of the evaluated samples. Other public health important bacterias, such as those belonging to the Enterobacteriaceae and Staphylococcus spp. were detected and discussed. Comparing the detection medians in the 3 levels of inspection by peer evaluation, a statistical difference was highlighted between the Municipal and Federal levels (PT= 0,03), with the highest median recorded at Municipal level. It is suggested better microbiological quality of cheese, and / or milk used as raw material, when they belong to the production submitted to the Federal Inspection in relation to Municipal one.
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