Can kissing transmit Helicobacter pylori?

Generally speaking, whether kissing can transmit Helicobacter pylori mainly depends on the oral and gastrointestinal health status and H. pylori infection status of both individuals. Detailed analysis is as follows:

If one individual is infected with H. pylori and has bacterial colonization in the oral cavity, and the other person has oral mucosal damage or weakened gastrointestinal barrier function, the direct contact of saliva during kissing may allow bacteria to enter the other person's oral cavity through saliva and subsequently cause infection after entering the gastrointestinal tract. Especially when the infected individual is in the acute infection phase or frequently experiences symptoms such as acid reflux and vomiting, the number of bacteria in the oral cavity increases significantly, thus markedly elevating the risk of transmission.

If neither individual is infected with H. pylori, or if the infected individual has successfully eradicated the bacteria after treatment, and both individuals maintain good oral hygiene without oral mucosal damage, the probability of transmission through kissing is extremely low. Additionally, even if one person carries the bacteria but maintains good oral hygiene with no oral inflammation, and the other person has intact oral mucosa and strong immunity, the possibility of bacterial transmission through kissing can be significantly reduced.

In daily life, attention should be paid to oral hygiene, including brushing teeth in the morning and evening, rinsing after meals, and undergoing regular dental check-ups and cleaning. If one partner is diagnosed with H. pylori infection, it is recommended to temporarily avoid kissing during treatment and until complete eradication of the bacteria. Additionally, implementing separate meals and using serving chopsticks and spoons can help prevent transmission through other routes.