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What are the largest size of organisms that eosinophils attack? 


 Eosinophils attack parasitic worms many, many times larger than themselves. If a hookworm or tapeworm is attached to the small intestine, for example, hundreds or thousands of eosinophils will often be found in the mucous membrane around the site of attachment. An eosinophil only 12 µm or so in size will attack a hookworm a centimeter long or a tapeworm 4 meters long.

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