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Roundworms.

Roundworms (Toxocara spp.) are a zoonotic risk.

Roundworms become a threat when the eggs are ingested from a contaminated environment, not typically from an infected dog licking faces.

Small children who put environmental items or soil in their mouths are most at risk.

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Parasites like hookworm, roundworm, and giardia can be passed from dog to human through licking.

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