Qualités physico-chimique et microbiologique de laits crus de vaches élevées en extensif au Nord-Est Algérien

摘要

Thirty samples of raw milk of small mixture (ten females) of local cows of six periurban farms of extensive breeding situated in the Algerian Northeast were analyzed for their physico-chemical and microbiological parameters 5 times every two or three days over a period of two weeks. At the exit of the udder, milk was characterized by a temperature of 36,6°C and a pH of 6,53. On average the content of the milk in fat and in protein material (subject) was respectively equal to 33,4 and 32,8 g/l. After collection, the milk presented a variable load of the FMAT from 2.10 3 to 49.105 ufc / ml, 4,7.104 ufc / ml of total coliforms and 1,1.104 ufc / ml of fecal coliforms, with a total absence of Salmonellas, Clostridiums and antibiotics.The content in coliforms (total, fecal) was superior to those mentioned by the Algerian gazette. The raw consummate cow's milk may present some sanitary risk for the population of the zone of study; its hygienic quality is bad. So it should be boiled or pasteurized.