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RESUMENSe determinaron los biotipos y susceptibilidad a ampicilina, clindamicina, eritromicina, ciprofloxacina ytetraciclina de 63 cepas de Gardnerella vaginalis aisladas de pacientes con vaginosis bacteriana. Las cepasse distribuyeron en los 8 biotipos del esquema de clasificacion de Piot, siendo los biotipos 1 y 2 los masfrecuentes (44,4%). Todas las cepas fueron susceptibles a ampicilina y resistentes a ciprofloxacina. Cuatrocepas (6,4%) presentaron resistencia a clindamicina y dos (3,2%) a eritromicina. Treinta y una cepas(49,2%) fueron resistentes a tetraciclina. Se estudio la base genetica de la resistencia a tetraciclina en ochocepas resistentes, demostrandose la presencia del determinante tet (M) en todas ellas.PALABRAS CLAVE: Gardnerella vaginalis, biotipos, susceptibilidadSUMMARYWe determined the biotypes and susceptibility to ampicillin, clindamycin, erythromycin, ciprofloxacin andtetracycline of 63 strains of Gardnerella vaginalis isolated from patients with bacterial vaginosis. All biotypesof the classification scheme of Piot were found, being biotypes 1 and 2 the most frequent (44.4% of thestrains). All isolates were susceptible to ampicillin and resistant to ciprofloxacin. Four strains (6.4%) wereresistant to clindamycin and two were resistant to erythromycin. Thirty one strains (49.2%) were resistantto tetracycline. The genetic basis of the tetracycline resistance was investigated in 8 strains, and in all ofthem DNA sequences related to the tet (M) resistance determinant were identified.KEY WORDS: Gardnerella vaginalis, biotypes, susceptibility

Biotipos y susceptibilidad antimicrobiana de Gardnerella vaginalis