Condições higiênico sanitárias do leite in natura e pasteurizado tipo C provenientes da bacia leiteira do médio Mearim-MA.

Abstract

With the aim to evaluate the hygienic sanitary conditions of ‘in natura’ and pasteurized type C milk, obtained from Médio – Mearin milk basin – MA, sixty (60) milk samples were analyzed, thirty (30) of them consisted of ‘in natura’ milk and the others consisted of pasteurized type C, establishing the most probable number (MPN) of total coliforms and coliforms at 45°C, enumeration of aerobic mesophilic bacteria, psychrotrophic bacteria and Listeria spp. The results demonstrated that from the 30 milk samples of type C milk, 29 (96,66%) and 27 (90%) were out of the microbiological patterns to total coliforms and coliforms at 45º C, respectively. The 30 ‘in natura’ milk samples analyzed showed values that varied from 150 MPN to > 1.200 MPN and < 3 MPN to 1.100 MPN to total coliforms and to coliforms at 45º c, respectively. The aerobic mesophilic count of all samples of type C milk were in accordance with the patterns established by the legislation, as to “in natura’ milk samples, the values founded varied from 2,8 x 10³ cfu to 2,2 x 105 cfu. The psychrotrophic count varied from 5,2 x 10 ³ cfu to 2 x 105 cfu type C milk. The presence of Listeria spp. was observed in three (10%) of the ’in natura’ milk samples analyzed and the absence of this microorganism in type C milk samples. It follows that, considering the results obtained, ‘in natura’ and pasteurized milk produced in Médio – Mearin milk basin – MA show unsatisfactory hygienic sanitary conditions, indicating serious hazard to public health