Dr. Connolly
Thrush is an infection of the mouth caused by the yeast-like fungus Candida. This kind of infection is common in infants and toddlers. Captain Darin, what else can you tell us about thrush?

Captain Darin
Well, Dr. Connolly, Candida is normally found on and in the body in small amounts. It's naturally present on the skin and in the mouth, as well as in the intestinal tract and genital area. Most of the time, this fungus causes no symptoms, but when Candida organisms overgrow, they can cause infections. Thrush occurs when Candida infects the tongue and lining of the mouth.

In very rare cases, the fungus can enter the bloodstream, and an infection can spread to other parts of the body, causing serious illness. Bloodstream infections are most common in newborns and children with weakened immune systems.