Psychrotrophic bacterial flora of raw ewes’milk, with particular reference to Gram negative rods

Abstract
The microbial flora of 141 samples of raw ewes'' milk was determined, before and after storage for 72 h at 4.degree. and 7.degree. C. Penicillin-resistant bacteria represented .apprx. 61% of 1760 psychrotrophic isolates from refrigerated milk samples. Pseudomonas fluorescens and Pseudomonas fluorescent group-related strains predominated (.apprx. 86%) in the gram-negative psychotrophic microflora. Leuconostoc dextranicum was the most frequent gram-positive psychotrophic species isolated.