Trichuris trichiura, commonly known as the whipworm, infects approximately one quarter of the world's population. It resides in the large intestine of humans. Whipworm infection is transmitted via fecal-oral route and is more common in less developed countries with poor sanitation. Heavy infections can cause bloody diarrhea, anemia, and rectal prolapse. Diagnosis involves detecting the barrel-shaped whipworm eggs in stool samples. Treatment includes mebendazole or albendazole which kill the worms. Prevention focuses on proper handwashing and sanitation to avoid ingesting contaminated soil or food.