TABLE 2.

Antibiotic susceptibility of B. burgdorferi clones containing pBSV2 or pKFSS1

PlasmidIC50 (μg ml−1)a
StreptomycinSpectinomycinKanamycinGentamicin
None70.172
pBSV2 (aphI)30.2>1,4006
pKFSS1 (aadA)6501.4103
  • a The IC50 is the concentration of antibiotic that inhibits growth by 50%.