Coliforms bacteria presence and physical-chemical composition of goat milk pasteurized in one stablishment under State Inspection Service, in Rio Grande do Sul

Abstract

The aim ofthis study was to verify microbiological quality and the physical-chemical characterization from 21 pasteurized goat milk strains. The Most Probable Number (MPN) of Total (TC) and Fecal coliforms (FC), total bacteria counts, fat, total solid, nonfat sec extract e density were detennined. It was possible to find TC in two strains (9.5%) (0.9 and 110 FCU/mL) and one strain (4.76%) with FC (2.1 FCU/mL). The total bacteriacountsreached a maximum of 2,5 x 106 cfuhnL. Two goat milk strains (9.5%) had density (1034,2 e 1035,8 g/L) higher than admitted. The nonfat sec extract presented variability and one strain (4.76%) presented lower value than admitted. Of the 21 pasteurizado goat milk samplcs analyzed, 14 (66,7%) presented satisfactory standard. All the samples had presented fat above of 3%, that were classified as integral milk. Seven strains were considered unsatisfactory, that didn't respect the criterias of TC and FC (1/7), mesophilic bacteria (5/7), density (2/7) and ESD (117) for pasteurized goat milk.