Oral thrush is most commonly seen in which groups?

• A. Healthy adults with normal immune systems
• B. Infants and older adults with weakened immune systems
• C. Teenagers with braces
• D. Athletes after dehydration

Answer: (B)

Oral thrush arises when Candida overgrowth isn’t kept in check by the body’s defenses, so groups with weaker or immature immune systems are most at risk. Infants have developing immune systems, and older adults often experience immune decline or are using medications that raise risk. In these groups, factors such as recent antibiotic use, denture use, diabetes, or immunosuppressive therapies can tip the balance in favor of Candida, leading to the characteristic white plaques in the mouth that may be uncomfortable or sore.

Healthy adults with normal immunity are much less likely to develop thrush. Teens with braces aren’t the typical group for widespread thrush, though poor oral hygiene or mouth irritation can cause other mouth issues. Dehydration by itself doesn’t usually trigger oral thrush, since the infection is fungal and depends more on immune status and oral flora balance.