Which of the following symptoms is NOT indicative of severe dehydration in an infant?

Bulging fontanelles is not a symptom typically associated with severe dehydration in infants. In fact, bulging fontanelles often indicate increased intracranial pressure or an underlying condition like meningitis rather than dehydration.

In contrast, symptoms of severe dehydration in infants typically include extreme thirst, sunken eyes, and a dry mouth. These signs reflect the infant's inability to adequately compensate for fluid loss. Extreme thirst signifies the body's need for hydration, while sunken eyes and a dry mouth are physical manifestations of fluid depletion.

Understanding these signs helps caregivers and health professionals recognize severe dehydration early, allowing for timely intervention and treatment.