Contaminação microbiana em carne moída de açougues da cidade de Santa Maria, RS, Brasil / Microbial contamination in minced meat of butcher shops of Santa Maria city, RS, Brazil

RESUMO

Foram coletadas aleatoriamente, 10 amostras de carne moída bovina em açougues da cidade de Santa Maria, RS, para determinar a presença de microorganismos totais, coliformes e Staphylococcus aureus. Respectivamente, usou-se os meios ágar para contagem total (PCA), ágar cristal violeta vermelho neutro bile e ágar bairdparker. Na contagem de microorganismos totais, 60% das amostras apresentaram entre 1,7 a 8,8 x 10(4) uFC/g de carne moída. Para Coliformes, 20% das amostras apresentaram um número menor que 1,0 x 10² uFc/g, 40% entre 1,0 a 3,2 x 10³ uFC/g, 30% entre 3,7 a 9,6 x 10(4) uFC/g e em 10% houve acidente laboratorial. Para Staphylococcus aureus, 100% das amostras resultaram positivas, sendo 50% entre 1,0 a 4,0 x 10³ uFC/g, 40% entre 1,3 a 2,8 x 10(4) e 10% entre 1,5 a 4,0 x 10(5) uFC/g de carne moída.

ABSTRACT

Ten samples of minced meat beef were collected in butcher shops of Santa Maria City, RS, Brazil, to determine the presence of total microorganism, total coliforms and Staphylococcus aureus. Respectively, PCA (Plate Counter Ágar), violet cristal red neutral bile and baird parker ágar was used. In the ágar plate counter for total microorganism. 60% of the samples presented a number between 1.7 a 8.8 x 10(4) CFU/g of minced meat. For Coliforms, 20% of the samples presented a number less than 1.0 x 10² C FU/g, 40% were among 1.0 and 3.2 x 10³ CFU/g, 30% between 3.7 to 9.6 x 10(4) CFU/g and in 10% had laboratory acidental. For Staphylococcus aureus, 100% of the samples turns positives with 50% of that between 1.0 a 4.0 x 10³ CFU/g, 40% among 1.3 to 2.8 x 10(4) CFU/g and 10% among 1.5 to 4.0 x 10(5) CFU/g of minced meat beef.