The lactobacilli, in their role as normal flora of the vagina, help the vagina resist infection by contributing to pH level of the vagina.
Lactobacillus is a common bacteria found in food such as yoghurt, and also our vagina. The presence of the bacteria in our vagina provides many benefits few of them are given here-
1. It produces organic acids such as lactic acids that which keeps the vaginal pH level low.
2. It also gives competition to other bacteria that may grow on vaginal walls for food and space, hence protects us from microbes that are not good for the bacteria.
Other than vaginal infection it is also good for treating diarrhea and eczema.
To learn more about lactocobacilli here
https://brainly.com/question/9667802
#SPJ4