Dénombrement des germes totaux et des bactéries conformes des laits crus délivrés à la Centrale laitière de Téhéran, et détermination du taux de contamination de ces laits en staphylocoques coagulase-positive

Abstract - 1 000 samples of raw milk from 120 farms producing milk for the Tehran pasteurizing Plant have been studied for total and coli count with special reference to coagulase-positive staphylococci. According to the results obtained, in 86,6 p. 100 of the cases no coagulase-positive staphylococci has been found but in 45 samples coming from the farms equipped with cooling apparatus the percentage of positive cases is 23,1 p. 100. This is certainely due to the influence of the growth of other microorganisms and in particular the lactic acid bacteria on the staphylococcal strains.