بررسی تغییرات میکروبی و شیمیایی شیر خام در مراحل مختلف از مراحل مرحله تولید تا ارسال به کارخانه در دامداری های صنعتی استان فارس

Abstract

with aim for Identification of contaminative and critical points of raw milk during production in 9 selected industrial dairy farms, 408 raw milk samples were collected from udders, milking machine, cooling tank and milk transport vehicle at receiving platform in dairy plant. Samples were examined for total microbial, coliform andE. coli count and also acidity and pH. Total microbial count of Sam pies was significantly lower in udders than the later stages (p<O.OO 1). Coliform count of Samples increased significantl y from udders to cooling tank and milk transport vehicle at recei ving platform in dairy plant (p<0.05). There were no significant differences (p>O.05) among theE. coli count atthe different stages. High total microbial count in udder milk samples and significantly increase of this factor and acidity in milking .,machine stage imply to localize executive, educational and investigative activity on this crisis points