How do dogs get heartworms?

heartworms
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How do dogs get heartworms?

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Microscopic heartworm larvae are transmitted from infected dogs to susceptible ones by mosquitoes. The mosquito ingests blood from the infected host. Any ingested heartworm larvae undergo life cycle changes within the mosquito to become “infective larvae”. These are then injected into previously uninfected dogs as the mosquito bites and feeds, and develop over time into adult heartworms.

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