Abstract
Eighty samples of raw milk, collected from eight Tunisian centres, were characterised. All these samples contained approximately 1011 cfu/ml of mesophilic aerobic bacteria (MAB), Lactic acid bacteria (LAB), yeasts and coliforms dominated the microflora of these samples. They varied from 105 to 109 cfu/ml. More than 70% of the analysed samples contained 106 cfu/ml of Pseudomonas. The content of contaminating microflora likeStaphylococcus, coliforms and mesophilic and thermophilic Bacillus ranged from 102 to 109 cfu/ml. However, mesophilic and thermophilic Clostridium were absent in all samples. This study could allow establishing the microflora distribution, revealing the non conformity of these eighty samples with standards, and pointing out eventual microbiological standards values of raw collected milk by comparison with standards. Key words: Raw milk, milk collect, contamination, milk standards, microbiological references.
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