Pinworm
Scientific Name: Enterobius vermicularis
Order & Family: Order: Oxyurida, Family: Oxyuridae
Size: Females are 8-13 mm long and 0.5 mm thick; males are smaller at 2-5 mm.
Natural Habitat
The human large intestine, particularly the cecum and appendix area.
Diet & Feeding
Intestinal contents and epithelial cells of the human host.
Behavior Patterns
Nocturnal migration where gravid females move to the perianal area at night to deposit eggs, causing intense itching. Eggs are infectious within hours.
Risks & Benefits
Risk: Causes Enterobiasis, characterized by perianal itching, insomnia, and irritability. Highly contagious via fecal-oral route or contaminated surfaces. Benefit: None to the host; strictly parasitic.
Identified on: 3/12/2026