Abstract
Summary
Protein A, a component of staphylococcal cell wall in the presence of fresh human serum is highly chemotactic in vitro for human polymorphonuclear leukocytes. Chemotaxis is dependent upon heat-labile factors, presumably complement within serum. Laudable pus in staphylococcal infection may, therefore, be the result of activation of chemotactic complement components generated by the reaction between protein A and nonimmune γ globulin.
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