Food microbiology is the study of microorganisms that inhabit the food, causes foodborne diseases, and food spoilage. Microorganisms are essentially important to produce fermented foods like curd, yogurt, cheese, beer, wine, and bread. Probiotics consumption is increasing day by day and that becomes increasingly important in food microbiology. Bacterial toxins are the main cause of food contamination. Now a day’s microbial polymers are also used in the food industry. Lactobacillus, Saccharomyces is the important bacteria used in the food fermentations.