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Phagocytosis of Borrelia recurrentis by blood polymorphonuclear leukocytes is enhanced by antibiotic treatment
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The removal of Borrelia spirochetes from the blood in relapsing fever was studied by examining patients' blood phagocytic cells with the Dieterle silver stain. Polymorphonuclear leukocytes ingested Borrelia at increased rates for several hours after antibiotic treatment, during which time the total numbers of circulating plasma spirochetes were decreasing. Incubation of infected blood at 37 degrees C for 2 h resulted in a progressive increase in phagocytosis. Addition of penicillin G and tetracycline to infected blood caused a further enhancement of phagocytosis. Electron microscopy of polymorphonuclear leukocytes revealed spirochetes in phagosomes. These results indicated that blood polymorphonuclear leukocytes have a prominent role in removing Borrelia from the plasma and suggested that antibiotics act by altering the surface of spirochetes to render them more susceptible to phagocytosis.
American Society for Microbiology
Title: Phagocytosis of Borrelia recurrentis by blood polymorphonuclear leukocytes is enhanced by antibiotic treatment
Description:
The removal of Borrelia spirochetes from the blood in relapsing fever was studied by examining patients' blood phagocytic cells with the Dieterle silver stain.
Polymorphonuclear leukocytes ingested Borrelia at increased rates for several hours after antibiotic treatment, during which time the total numbers of circulating plasma spirochetes were decreasing.
Incubation of infected blood at 37 degrees C for 2 h resulted in a progressive increase in phagocytosis.
Addition of penicillin G and tetracycline to infected blood caused a further enhancement of phagocytosis.
Electron microscopy of polymorphonuclear leukocytes revealed spirochetes in phagosomes.
These results indicated that blood polymorphonuclear leukocytes have a prominent role in removing Borrelia from the plasma and suggested that antibiotics act by altering the surface of spirochetes to render them more susceptible to phagocytosis.
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