Who doesn't like to give a little baby a kiss? Did you know you could be giving that baby cavities? We read about this on MSNBC.One woman mentioned in the article, Rachel Sarah, took her two-year-old daughter to the dentist for her first dental checkup. Not only did the baby have two cavities in her baby teeth, the dentist suggested that she'd caught them from her mom! Experts have known for 30 years that mothers can transfer cavity-causing bacteria to their babies through their saliva. The saliva doesn't have to come from a kiss - it can be transferred by sharing utensils, like one spoonful of baby food for me, one for the baby. You can also transfer saliva simply by blowing on food, and as we mentioned, kissing a baby on the mouth.According to Dr. Jane Soxman, a pediatric dentist, kissing a baby on the lips is just one of several factors that can make a baby's teeth rot. Others include genetics, oral hygiene, and feeding practices. For example, it's not good to let your baby constantly suck on a sippy cup full of juice, milk, or other sugary drinks. Bacteria use the sugar to break down tooth enamel, and baby teeth are particularly vulnerable to decay. The main thing to know is that tooth decay is a bacterial infection that can be spread from one person to another. Know this: The decay won't just affect the baby teeth. If the bacteria are allowed to thrive, they'll stick around for years and attack the child's permanent teeth when they come in.Fortunately, there are several things parents can do to prevent it. If you have active tooth decay, have your teeth thoroughly cleaned during the second and third trimester of pregnancy. Also, after the baby is born, cut down on saliva-transferring behaviors - like mouth kissing and sharing utensils. Some moms pop the baby's pacifier in their own mouths - you've got to stop doing that. Another way to prevent the spread of bacteria: Wipe your baby's mouth out with a clean, wet cloth every time you change the diaper. If you wipe the tongue, teeth, and cheeks, the bacteria won't have a chance to colonize and attack baby's teeth. If you do that, you won't have to stop the other behaviors, like kissing your baby.