[The effect of cefaclor, doxycycline and other oral antibiotics on phagocytosis of polymorphonuclear granulocytes and PHA-induced stimulation of blood lymphocytes in man].

The influence of the orally applicable antibacterial agents, cefaclor (Panoral), doxycycline, erythromycin, and cotrimoxazole on phagocytosis by human neutrophil granulocytes was investigated. Further, the influence of cefaclor, erythromycin, and doxycycline on PHA stimulation of human blood lymphocytes was studied. Doxycycline (1 mg/ml) had strongly suppressive effects on phagocytosis, whereas cefaclor (1 mg/ml cotrimoxazole (0.1 mg/ml), and erythromycin (0.1 mg/ml) did not suppress phagocytosis. PHA-induced lymphocyte stimulation was strongly inhibited by doxycycline (10 micrograms/ml), whereas cefaclor (10 micrograms/ml) did not suppress at all. Erythromycin (10 micrograms/ml) exerted some inhibition (average 12.6%). These results are discussed with respect to immunoneutrality of antibacterial agents.