SEM of roundworm Toxocara canis.

SEM of roundworm Toxocara canis.

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Credit: JACKIE LEWIN, EM UNIT, ROYAL FREE HOSPITAL /SCIENCE PHOTO LIBRARY

Caption: Toxocara canis. Scanning electron micrograph of the nematode (roundworm) Toxocara canis, the cause of toxocariasis (visceral larva migrans) in humans. Toxocara canis is a parasite of dogs, and its eggs are found in dogs' faeces. Humans, often children, can become infected with toxocara canis eggs if they have contact with an infested dog or contaminated soil. The swallowed eggs hatch in the intestines to liberate larvae, which migrate through the tissues to organs such as the liver, lungs, brain and eyes. The migrating larvae may cause mild malaise, or asthma, seizures, pneumonia & blindness. Magnification: x1200 at 8x6 inch size

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Keywords: animal, invertebrate, invertebrates, nature, nematoda, nematode, roundworm, sem, toxocara canis, toxocariasis, visceral larva migrans, wildlife, worm, zoology

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