Capillariasis is a parasitic disease in humans caused by two different species of capillarids: Capillaria hepatica and Capillaria philippinensis. C. hepatica is transferred through the fecal matter of infected animals and can lead to hepatitis. C. philippinensis is transferred through ingesting infected small freshwater fish and can lead to diarrhea and emaciation.

Image: Left: A C. philippinensis egg in an unstained wet mount of stool. Right: Longitudinal section of an adult of C. philippinensis from an intestinal biopsy specimen stained with hematoxylin and eosin (H&E). Credit: DPDx