Antimicrob Agents Chemother. 2002 Nov;46,11:3637-40. Erythromycin resistance in Borrelia burgdorferi. Terekhova D, Sartakova ML, Wormser GP, Schwartz I, Cabello FC. Departments of Microbiology and Immunology, New York Medical College, Valhalla, New York 10595, USA. Susceptibility testing of laboratory strains and clinical isolates of Borrelia burgdorferi indicates that resistance to erythromycin is present in them. Evaluation of the MICs, minimal bactericidal concentrations, and kinetics of bacterial killing of erythromycin suggests that this resistance is increased by preexposure to the antibiotic, is dependent on inoculum size, and may be the result of selection of subpopulations of bacterial cells with increased resistance