Abstract
Abstract When “nonsensitive” cells from skin test negative donors were incubated with specific antigen and specific cell lysates obtained from strongly skin test-positive histoplasmin, coccidioidin, or tuberculin skin test donors, the “nonsensitive” cells were “sensitized” and liberated a substance which specifically inhibited the migration of guinea pig macrophages. Cell lysates, antigen, or nonspecific combinations of both, either in the presence or absence of “nonsensitive” cells, failed to inhibit the migration of guinea pig macrophages.
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