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  • Infection Engines

    Infection Engines

    Image of the Week

    A group of intracellular tachyzoites of the toxoplasmosis-causing parasite Toxoplasma gondii.

  • Eating Wood

    Eating Wood

    Image of the Week

    A soldier Dampwood termite (Zootermopsis nevadensis) in a nest gallery.

  • Deadly Straw

    Deadly Straw

    Image of the Week

    Blood cells adorn the proboscis of a female mosquito.

  • Malaria: Mosquito Host

    Malaria: Mosquito Host

    Animation

    (3 min 59 sec) A mosquito becomes infected with malaria when it sucks the blood from an infected human. Once inside the mosquito, the parasites reproduce in the gut and accumulate in the salivary glands, ready to infect another human host with the next bite.

  • Malaria: Human Host

    Malaria: Human Host

    Animation

    (4 min 18 sec) When a malaria-carrying mosquito bites a human host, the malaria parasite enters the bloodstream, multiplies in the liver cells, and is then released back into the bloodstream, where it infects and destroys red blood cells.