The book contains three parts occur in the first part of the principles of microbiological year and how sterilization and Tsbeg different kinds of bacteria, a recent road preventive health at the workplace and in the second part discussed various bacteriological testing typically conducted on raw milk and milk corresponding heat and dairy products in general while dealing Part III of the events of microbiological tests on food products and raw and processed them. It also added to the first part of the book, some of which exercises the necessary experience in Tsbeg as bacteria and general experience on the tools sterile laboratory.