<prompt> Which is the anaerobic bacteria that is commonly found in cervix or vagina which keeps the pH low and protect from other bacterial infections?LactobacilliGardnerellaMobilincusClostridium  <response>: Lactobacillus or Doderleins bacillus is the most common organism found in vagina. Lactobacilli are gram-positive non-spore-forming rods found as members of the normal flora in the mouth, colon, and female genital tract. In the mouth, they may play a role in the production of dental caries. In the vagina, they are the main source of lactic acid, which keeps the pH low. Ref: Levinson W. 2012. Chapter 27. Minor Bacterial Pathogens. In W. Levinson Ed, Review of Medical Microbiology Immunology, 12e. 