TABLE 2.

Characteristics of intI1-positive strains

StrainIsolation datebOrganismCassette arrayIRi junctionIRt junctionSul1f
30202 MarchE. colidfrA17-aadA5UKdNPe+
3843a5 AprilE. coliNAcTn21 > IS26NP
36655 AprilE. colidfrA17-aadA5Tn21gTn21h+
387915 AprilE. colidfrA17-aadA5UKTn21h+
529310 MayE. coliaadA1aTn21 > Tn5051gNP+
804727 MayE. colidfrA1-aadA1aUKNP
530227 MayE. colidfrA17-aadA5UKNP+
8157a12 JuneE. coliNATn21 > IS26gNP
816712 JuneE. colidfrA17-aadA5Tn21gTn21h+
817512 JuneE. coliaadA1aTn21gTn21h+
822120 JuneE. cloacaeblaoxa101-aacA4Tn21NP+
818020 JuneK. pneumoniaedfrA22UKTn5036h+
839230 JuneE. colidfrA17-aadA5Tn21gTn21+
839330 JuneE. coliNATn21Tn21+
944530 JuneE. coliNATn21 > IS26NP
1301420 AugustE. colidfrA17-aadA5Tn21Tn21+
12674/120 AugustE. colidfrA17-aadA5UKNP+
1292820 AugustE. colidfrA17-aadA5UKNP+
1295020 AugustP. mirabilisaadB-aadA1aTn21gNP+
12836a20 AugustK. pneumoniaedfrA12-orfF-aadA2Tn5036gTn21h+
4012/230 AugustE. colidfrA17-aadA5Tn21NP+
  • a Also positive for intI2.

  • b All dates 2005.

  • c NA, no amplicon generated by PCR with HS458 and HS459.

  • d UK, unknown. No PCR product was generated with any PCR primer pair.

  • e NP, not present. IRt is inferred to be absent based on the failure to generate a PCR product with tniA-specific primers.

  • f A plus or a minus sign indicates the presence or absence of a PCR product with primers HS549/HS550.

  • g Junction confirmed by DNA sequencing. For the remainder, the junction was inferred by PCR fragment length.

  • h Junction confirmed by DNA sequencing. For the remainder, the junction was inferred by PCR fragment length.