Trichuris trichiura (whipworm) is a soil-transmitted helminthes (STH). It commonly causes parasitical infection worldwide, but occurs most frequently in children of developing countries. Infection of the gastrointestinal tract by T. trichiura in children can lead to impairments in physical, intellectual, and cognitive development. Most cases are asymptomatic, and as a result, acute and substantial bloody diarrhea resulting from infection with T. trichiura can be overlooked. With progressive socioeconomic development and hygiene improvement, the prevalence of trichuriasis has been declining quickly in Taiwan. Here, we report a sporadic case of an 11-month-old female infant who presented with fever and substantial bloody diarrhea. Microscopic examination showed that her stool contained eggs typical of T. trichiura. She recovered completely with mebendazole treatment.