Toxocara canis, eggs x65 on orange background.

Toxocara canis, eggs x65 on orange background.

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Caption: Light micrograph of the eggs of the dog roundworm Toxocara canis. An embryo can be seen through the thick, pitted wall of one of the eggs. The larvae cause toxocariasis, a parasitic infestation due to ingestion of material contaminated by eggs deposited in dog faeces. They migrate around the body destroying various tissues; the liver may enlarge and the lungs become inflamed. Symptoms include fever, joint and muscle pain, vomiting and convulsions; larvae lodging in the retina of the eye cause inflammation and granuloma. Distributed throughout the world and primarily affecting children, there is no satisfactory treatment for the disease. Magnification: x65 at 35mm size.

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Keywords: animal, egg, granuloma, invertebrate, invertebrates, larva, nature, nematoda, nematode, roundworm, roundworms (dog), toxocara canis, toxocariasis, wildlife, zoology

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