Microbes in human oral cavity: a review

The oral cavity being one of the important opening encounter huge number of microorganisms via air, water and food. Some of them establish, grow and multiply, form communities inside the cavity. The selection and growth of these microorganisms depend upon the physiochemical environment in the cavity. Various molecules of the host and resident microorganisms are responsible for the environmental conditions. Literatures indicate that change in this molecular content in the cavity may likely change the microbial communities in it. Therefore, in case of various diseased conditions/changed food habit may invite changes in microorganisms inside the oral cavity. Thus association of certain microorganisms or increased number of certain microorganisms in the oral cavity may be a good indicator for disease diagnosis.