Assertion: eosinophil's role | /r/HasProperty | suggested in primary infection models
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text: Murine studies are particularly problematic because mice are not the natural hosts of many of the experimental parasites; nevertheless, in some primary infection models, a role for IL-5 in protective immunity has been suggested following infection with Strongyloides venezuelensis, Strongyloides ratti, Nippostrongyloides brasiliensis, and Heligmosomoides polygyrus (123, 124).