Health encyclopaedia - Alphabetical Topic List

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Toxocariasis

Toxocariasis is infestation with the juvenile (young) forms of the common puppy worm Toxocara canis or, rarely, the similar cat parasite Toxocara cati. The condition is largely found in children who come into contact with puppy fur and soil contaminated with puppy or cat faeces.

London parkland has been shown to be widely contaminated with Toxocara worm eggs deposited by dogs. Soil samples taken from almost anywhere within the parks are found to contain their eggs.

Human infestation with toxocara is more common than has been supposed, since many cases are free of symptoms.