TABLE 2.

Relative colonization abilitiesa of V. fischeri strains carrying antibiotic resistance

StrainRCIb
24 h48 h
JRM1000.91 ± 0.29NDc
JRM2000.76 ± 0.28ND
ESR10.05 ± 0.82d0.03 ± 0.16d
  • a Colonization ability was measured during competition with the parent wild-type strain ES114.

  • b RCI, percentage of a given strain in the light organ divided by percentage of that strain in the inoculum at 24 or 48 h postinoculation.

  • c ND, not determined.

  • d The ability to colonize the light organ was significantly less than that of wild-type V. fischeri (P < 0.05).