Parasitic roundworm. Coloured scanning electron micrograph (SEM) showing the head of Ascaris lumbricoides, a parasite of the human intestine. Female r

---

Parasitic roundworm. Coloured scanning electron micrograph (SEM) showing the head of Ascaris lumbricoides, a parasite of the human intestine. Female roundworms can lay up to 200,000 eggs per day, which are excreted in the faeces and ingested by a new host through contaminated water or food. Infection causes abdominal pain, vomiting, diarrhoea and peritonitis. Magnification: x120 when printed 10 centimetres wide.

---

Size: 4554px × 3881px
Photo credit: © EYE OF SCIENCE/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: animal, ascaris, biological, biology, body, close-, coloured, detail, endoparasite, false-coloured, fauna, head, human, intestinal, invertebrate, invertebrates, lumbricoides, medical, medicine, nature, nematoda, nematode, parasite, parasitic, parasitology, person, roundworm, sem, wildlife, zoological, zoology