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NOTE: CDC's DPDx webpage for Laboratory Identification of Parasites of Public Health Concern has been moved to https://www.cdc.gov/dpdx/index.html. See the Parasites A-Z Index to locate diagnostics for a parasite.
Resources about Endoparasites
Fleas - CDC
Parasite page from the Centers for Disease Control explains the flea life cycle and what diseases are transmitted by the insect. An image gallery is also provided.
Lice - CDC
The Centers for Disease Control provide information about head, body, and pubic lice. Find out the biology, diagnosis, treatment and more for each type.
Ticks - CDC
This fact sheet from the Centers for Disease Control tells you where ticks live, what diseases they carry, how to prevent bites, and how to remove them from people and pets.