An investigation on raw milk microbial pollution from milking to delivery in east Azerbaijan province

• Main Authors: Amjadi Majid azari ,Habib, Mahdavi-Adeli, H, Moghaddam, Gh, Dehnad, A
• Format: Publication
• Language: Persian
• Published: Karaj (Iran) Animal Science Research Institute (ASRI) 2011
• Subjects: http://www.fao.org/aos/agrovoc#c_24942; http://www.fao.org/aos/agrovoc#c_3930; http://www.fao.org/aos/agrovoc#c_4826; http://www.fao.org/aos/agrovoc#c_4835; http://www.fao.org/aos/agrovoc#c_6077; INVERSIONES; INVESTISSEMENT; INVESTMENT; LAIT; LECHE; MICROBIAL PESTICIDES; MILK; MILKING; ORDENO; PESTICIDE MICROBIEN; PLAGUICIDAS MICROBIANOS; POLLUTION; POLUCION; TRAITE

A microbial trail was conducted to determine the changes on raw milk microbial pollution from milking to delivery at milk industry. Gathering centers and dairy farms were categorized into three groups; high products , medium and low products. Three numbers were randomly selected from each. Milk samples were taken from breast, bidon, internal, colder and tank in the gathering centers and from breast, colder and tank in the dairy farms in all four seasons of year. Then samples were cultured in Agar Crum culture for 48 hours, After that the colonies of psychrophil-bacterien, E-coli, coliform and total count (T.C) were numbered by colony count machine. In order to clarify effect of Sanosil desinfectant, it was distributed at high product centers and high products dairy farms, and milk samples were taken again. Also Acidity and pH of all samples were measured. Data were analyzed using the General Linear Models (GLM) procedure by SPSS 11.5 soft ware. Data were arranged in 3×4×5 and 3×4×3 factorial arrangement of treatments for gathering centers and dairy farms respectively, to test for level of production, season and sampling place. Where appropriate, separation of means was achieved through the Duncan's multiple range tests. There were often significant differences in colony counts between levels, seasons and places (p0.05). The highest colony was in the high products and the lowest were in the low products. Also the highest colony was in the summer and the lowest were in winter, and it was in autumn more than spring. Numbers of colonies were significantly increased from milking to delivery at the milk industry. Sanosil infecting decreased microbial pollution in the dairy farms, and it also decreased psychrophil-bacterien and E-coli in the gathering centers, but it didn't decreased coliform and T.C.(p0.05). Most of these results were similar with others research results.