Cavities. The notorious grating sound of the dentist’s drill may scare you away from candy and chocolate, but did you ever think you could get cavities from kissing? The bacteria that cause cavities may be transmissible through saliva, according to a study published in the Journal of the American Dental Association.

Tooth decay is the corrosion of the enamel that protects the tooth from cavities, according to the American Dental Association (ADA). When carbohydrate-rich foods such as soda, milk, cakes, candy or raisins are left on the teeth, tooth decay can occur. Bacteria that live in the mouth thrive on these foods and bacteria buildup can result in an increase of oral acid. After a while, the acids ruin the tooth enamel, resulting in tooth decay and cavities.

The kissing bacteria?

Streptococcus mutans is the bacterium blamed for causing cavities, and may be transmissible through saliva, according to the study published in the Journal of the American Dental Association. It lives in saliva and dental plaque. The bacterium can be spread through direct or indirect contact. Indirect contact includes sharing infected objects such as eating utensils, toothbrushes, cups or food. Kissing is considered direct contact.

The degree of transmission varies from person to person. Many factors intersect to determine whether or not bacteria will be transferred. These include the extent of the infection in the carrier, the frequency of contact and the diet and immune system of the receiver. The bacteria are easily spread and parents should exercise caution with their children. Children are less aware of dental habits and more susceptible to germs. Kissing an infant on the mouth is highly discouraged by the researchers of the study.