Studies on the Sanitary Condition of Market Raw Milk in Zagazig With Special Reference to Enterobacteriaceae

One hundred random samples of market milk collectedfrom different localities in Zagazig and its suburbs wereexamined in this work for detection of their sanitary con-dition.All samples showed strong positive results forGuaiac test, and thus proved to be raw.The results of the keeping quality tests revealedthat 18% of samples were precepitated with alcohol, whileone sample was clotted on boiling. The mean acidity per-cent was 0.174 + 0.003 with a minimum of 0.090 and a maxi-mum of 0.234.The bacteriological examination revealed that thetotal colony count/ml. milk ranged from 36 x 105 to 70 x1’) . l2 r 1210 ~, Wlth a mean value of 37.66 x 10- + 1.250 x 10 •The mean to~al enterococci count /ml. milk was50.4 x 104 + 7.98 x 104• The differential counts are re-corded.Coliforms were present in all examined samples atvarying counts (MPN/ml) ranging from 23 x 103 to 24 x 1013,with a mean value of 27.51 x lOll + 2~439 x lOll.