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Important Holiday Shipping Schedule Update


ATCC will be closed Wednesday, December 24, 2025 to Thursday, January 1, 2026. Please be advised  you can still submit orders for products during this time, but shipping will resume on Friday, January 2, 2026.


To ensure shipping before the ATCC holiday closing period, please reference the shipping schedule below:


  • Last shipping day for Domestic orders is Friday, December 19, 2025 (Room temperature items shipping only as no frozen item shipments on Fridays. Frozen/ dry ice shipments resumes January 2, 2026).

  • Last shipping day for International orders is Friday, December 12, 2025.

  • Shipping resumes January 2, 2026 for orders submitted after December 19, 2025.

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Parasitic Protozoa

Red sphere inside the transparent Leishmaniasis parasite with a tail.

ATCC offers a variety of parasitic protozoa

Parasitic protozoa are single-celled organisms that have the ability to invade the tissues and cells of humans and other animals, causing a range of medical outcomes, from non-threatening to serious disease. These microorganisms are found in numerous habitats and can be acquired via fecal-oral transmission, through sexual contact, or from arthropod vectors such as ticks and mosquitoes.

Detecting and treating parasitic protozoa can be challenging, making the need for accurate diagnostics and effective antiparasitics all the more urgent. To support research on these pathogens, ATCC provides over 1,000 strains of parasitic protozoa, including the causative agents of malaria, toxoplasmosis, giardiasis, leishmaniasis, babesiosis, and Chagas disease.

Discover our collection of parasitic protozoa below to help you advance your research today.

Watch our webinar to learn about tick-borne protozoa

Parasitic Protozoa

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