M.A. Thesis:

Study on listeria monocytogenes contamination in the Centers of row milk production of and raw milk collecting stations

Listeria monocytogenes Food such as dairy products can be exposed to pollution and are caused by infection in a variety of infections. Among these bacteria, which are transported from milk and dairy products, is the bacterium Listeria monocytogenesis that can cause various diseases such as meningitis, toxic septicemia, abortion, etc. Milk is considered to be a good and suitable culture medium for some of the microplantations especially pathogenic pathogens. The pathogens of the milk may be of a dairy or worker that is involved in various stages of dushiden, collecting and transporting it or entering from the surrounding area. This organisms may be excreted directly from the breast in the milk, or by the skin and the mucus of the animal, or the workers can infect the milk, and contaminate milk and other means. In this research, we conducted a study on 51 samples of raw milk of contamination with this type of bacteria. Using microbiological methods and biochemical methods, we used 3 samples of Listeria monocytogenesis (6% of the contamination) and confirm this procedure. contamination rate and emission conditions and the percentage of Dispersion and prevalence of this bacteria in the cities of Iran and other countries have also been compared the incidence of the prevalence of this study. There is also a significant study on dairy products. Foods such as dairy products can be contaminated in various ways and can cause contagious diseases. Among these bacteria that are transmitted to milk and dairy products, Listeria is the more monosynthetic bacterium that can cause various diseases such as meningitis, poisoning, poisoning, abortion, and so on. In this study, we tried to investigate the rate of infection of this bacterium with 17 samples of raw milk. Using microbiological and biochemical methods, we were able to isolate 1 liter of sample or monocytogenes (5.8% infection) and confirm this procedure.

Keywords: Raw milk, microbiological contamination