Microscopy
Humans serve
as only paratenic hosts for Toxocara spp. After the
ingestion of eggs, larvae hatch, penetrate the intestinal wall, and are
carried by circulation to other body parts, including the liver, lungs,
brain and eyes. Larvae cease to develop any further and elicit
immune reactions that are the basis of toxocariasis.
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A |
B |
A:
Cross-section of Toxocara sp. larvae in liver tissue stained with hematoxylin and eosin (H&E).
B: Longitudinal section of a Toxocara sp. larva in liver
tissue stained with H&E.
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C |
C:
Longitudinal section of a Toxocara sp. larva in lung tissue stained with H&E.
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