TABLE 2.

Susceptibility of E. coli J53 transconjugants to various quinolones

Plasmid in E. coli J53Qnr proteinMIC (μg/ml)
Nalidixic acidCiprofloxacinGatifloxacinLevofloxacinMoxifloxacin
R40.0150.030.030.06
pMG252QnrA320.50.511
pHSH4-3QnrA160.250.50.50.5
pMG298QnrB116110.52
pMG299QnrB1160.250.50.51
pMG300QnrB1160.250.50.251