Have you already looked into the gut microbiota (gut bacteria)? If so, you've probably come across the fact that not only our gut, but our entire body is colonized by them. Skin bacteria are found on the skin, the mouth is colonized by the oral microbiota, and vaginal bacteria live in the vagina. Döderlein bacilli are frequently mentioned in connection with the vaginal microbiota. This group of lactobacilli naturally colonizes the vaginal mucosa and maintains an acidic pH. This acidic environment prevents pathogenic bacteria from adhering to the mucous membranes.
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Kissing boosts the immune system
Studies show that intimate kissing with tongue contact exchanges around 80 million bacteria within 10 seconds. This not only promotes bacterial diversity, but also additionally strengthens our immune system. The more often couples kiss, the more similar their oral microbiota becomes!
Sexuality: Bacterial exchange during sex
This raises the question of whether this exchange also takes place on other mucous membranes and whether sex transfers bacterial groups. A group of researchers led by Miguel Carda-Diéguez investigated this question. In a case study, they examined a heterosexual couple who suffered from recurrent vaginal and oral infections after sexual intercourse. The scientists explored the effect of oral and vaginal sex on the microbiota.
To do this, the researchers took genital swabs before sex and four days after unprotected intercourse. To rule out microbial changes caused by direct genital contact, additional samples were taken after protected sex (using condoms). Of course, samples were also taken before any sexual intercourse took place. These baseline data showed that both participants had a stable microbiota. Corynebacterium and lactobacilli were the most prevalent bacterial groups. After sexual activity, the proportion of lactobacilli decreased from 90 to 45%. On the penis, Corynebacteria increased from 33 to 52%. Interestingly, the abundance of Prevotella and Atopobium increased. These two bacterial groups are often responsible for bacterial vaginal infections. Sampling after four days showed that after a few days, the microbiota—especially in the vagina—did not change further. When condoms are used, no transfer of bacterial groups occurs. Therefore, it can be assumed that a transfer of genital microbiota occurs during unprotected intercourse and can be detected in the partner for several days.
A similar situation is seen with the oral microbiota. Here, the researchers found significant changes in the groups of streptococci and lactobacilli.
Stay healthy with biologically active bacteria
The exchange of bacteria is part of every physical contact. Nevertheless, there is no need to worry, as these bacteria support the immune system. If you do experience problems with vaginal or oral infections, you can additionally support your body with probiotic preparations. These contain beneficial bacteria that naturally occur on the respective mucous membranes and displace pathogenic bacteria. In addition, they strengthen the immune system and help maintain long-term health.
Conclusion
This case study represents a unique pilot project. Therefore, the available data are very limited and further studies are required. Nevertheless, as kissing studies have already shown, it demonstrates that microbial transfer through unprotected sexual intercourse is possible. This results in a shift in bacterial balance, which can promote oral as well as vaginal diseases. Support with biologically active preparations is therefore advisable. These support bacteria in the vaginal and oral areas by displacing pathogenic bacteria and strengthening the immune system.
So have fun and kiss your partner as much as you like—because it not only makes you happy, but also promotes bacterial colonization and the immune system!
To support your oral microbiota, we recommend our DentaSan ProbioPROTECT.
