Journal
INFECTION AND IMMUNITY
Volume 71, Issue 2, Pages 1016-1019Publisher
AMER SOC MICROBIOLOGY
DOI: 10.1128/IAI.71.2.1016-1019.2003
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Funding
- NIAID NIH HHS [AI22223] Funding Source: Medline
- NIDDK NIH HHS [P30 DK034987, DK34987] Funding Source: Medline
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We employed gentamicin-sensitive and -resistant derivatives of Escherichia coli in a macrophage phagocytosis assay that compared lambda bacteriophage and gentamicin as extracellullar bactericidal agents. Colony counts and direct microscopic examination of phagocytized E. coli supported the conclusion that gentamicin entered macrophages, even at low concentrations, and contributed to their bactericidal activity. Also, two E. coli strains differing in the ability to express the adhesin of type 1 pili (FimH) were distinguishably different in intracellular survival when lambda was used as the extracellular killing agent but were indistinguishable when gentamicin was employed.
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