Effects of Erythromycin, Josamycin and Spiramycin on Rat Polymorphonuclear Leukocyte Chemotaxis

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Abstract
The effects of three macrolide antibiotics were studied on rat polymorphonuclear leukocyte chemotaxis. Rats were given 25 mg/kg twice a day of either erythromycin, josamycin or spiramycin by gastric intubation for 5 days. In all cases, chemotaxis was found to be impaired by 10–20% only. As macrolides are known to reach high intracellular concentrations within polymorphonuclear leukocytes, our results suggest that these antibiotics are unlikely to exert a deleterious influence on the chemotactic response of treated patients.