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What bacteria and fungi live in our mouths?

11 January 2018

A warm, moist environment is perfect for the bacteria and fungi. The bacterial flora within our mouths is very rich, but as long as it remains within the physiological balance, it won’t pose any danger to our life or health. What happens when this perfect state gets disrupted though?

What happens when the bacterial flora’s balance gets disrupted?

Even if, in case of a healthy body, the bacteria living in the mouth don’t cause any trouble, even a small disruption is enough to change everything. These bacteria can then infect your body. The situation when new microorganisms appear in your mouth even if they shouldn’t be there is also possible.

The most common complications of disrupted balance of the bacterial flora are tinea, cavities and other periodontal diseases.

Cavities – causes

One of the most common consequences of disrupting the balance of bacterial flora within our mouth is the forming of cavities. These are mostly caused by the Streptococcus gordonii, Lactobacillus rhamnosus and Streptococcus mutans bacteria.

The disruption of balance of the bacteria living in our mouth, leading to the cavities, is usually an effect of a bad oral hygiene. If you’re consuming lots of carbohydrates and sometimes even don’t brush your teeth properly, you might lead to the cavities forming on your teeth. It’s caused by the processing of carbohydrates within our mouth, leading to the bacteria secreting acids which weaken our enamel. The pH level is reduced, allowing the bacteria to attack our teeth, forming the dental plaque on their surface. This leads to cavities.

Oral candidiasis

There are many fungi living in our mouth. Just like in case of bacteria, as long as as the balance of the flora within our mouth isn’t disrupted, their presence won’t be harmful to us. The yeasts might multiply dangerously fast though, leading to the development of candidiasis. This illness manifests by, for example, aphthae appearing on our mucous membranes. Candidiasis is very difficult to treat, that’s why it’s better to prevent it.


The bacteria living in our mouths might lead to having a bad breath. The microorganisms feeding on saliva and epithelial cells secrete the smelly volatile sulfur compounds while processing matter. Because of that, you’ll end up having a bad breath, which doesn’t go away even after brushing your teeth.

If you’re having problems with a bad breath, invest in toothpastes containing thymol, eucalyptus oil, zinc ions and mint extract.

These are the most common diseases caused by disrupted balance of bacterial flora within our mouth. We shouldn’t ignore them! In order to avoid them, remember to clean your mouth from various miccorganisms every day.

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