Neutrophil chemotaxis in patients with Staphylococcus aureus furunculosis.

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RESUMO

Neutrophil chemotaxis was evaluated in patients with staphylococcal furunculosis using a modified Boyden chamber assay. Neutrophil chemotactic response to Staphylococcus aureus-derived chemotactic factor was compared with response to Escherichia coli-derived chemotactic factor and zymosan-activated serum. Twenty-one patients with active furunculosis were compared with 29 patients with a history of furunculosis but no recent infection and with 29 healthy control subjects. Chemotactic response to the staphylococcal chemotactic factor was significantly higher in patients with active furunculosis (mean 61.6) than in patients with a history of furunculosis (mean 36.4) or controls (mean 31.4), P less than 0.001. Neutrophils from patients with active staphylococcal infections also had higher chemotactic activity toward E. coli chemotactic factor, but not significantly so (P = 0.09). Chemotactic response to zymosan-activated serum and background neutrophil motility was comparable among the three groups. The increased neutrophil chemotactic response of patients with active infection to bacterial factors, but not zymosan-activated serum, may represent a specific neutrophil response to products of infecting organisms. The differential response of the patients' neutrophils to these attractants supports evidence for the presence of separate categories of chemotaxin receptor on the surface of neutrophils.

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