Abstract

• Yogurt is among the most popular fermented foods in the world. In the present study, ten samples of yogurt from South Okkalapa Township and North Dagon Township were collected. The study period was lasted from January 2022 to August 2022. This study was conducted at the Microbiology Laboratory, Department of Zoology, Dagon University. In the present study, the objectives were to enumerate and identify bacterial isolates and access their antimicrobial activities. The enumeration of total bacteria count in ten yogurt samples was duplicated carried out. The maximum bacteria count was found in sample code YgI of South Okkalapa Township at 9.62×108 cfu/ml and the minimum count in sample code YgA of South Okkalapa Township was 5.32×106 cfu/ml. This research was used streak plate method for isolation on MRS agar for their colony morphology and biochemical characters. According to the colony morphology, gram staining and biochemical tests, six bacteria genera were identified as Leuconstoc (14.81%), Lactococcus (18.52%), Pediococcus (3.71%), Clostridium (18.52%), Lactobacillus (33.33%) and Streptococcus (11.11%). All of the isolated bacteria did not show antimicrobial activity against tested targets Escherichia coli, Staphylococcus aureus and Bacillus subtilis bacteria. Yogurt is good for health because it contains beneficial live bacteria so it should be consumed every day.