TABLE 3.
Antimicrobial resistance genes detected in multidrug-resistant serovar Infantis strains
| Resistance profilea | No. of strains | Integron geneb | PFGE profile | Antimicrobial resistance genesc |
|---|---|---|---|---|
| ACSSuTTmKG (ATM, CEF, CXM, CAZ, CTX, CRO, FEP) | 6 | aac(6′)-Iq | A1 | blaTEM, catI, aadA1, sulI/II, tet(D) |
| ACSSuTTmKG (ATM, CEF, CXM, CAZ, CTX, CRO, FEP) | 1 | aac(6′)-Iq | A1 | blaTEM, catI, aadA1/A2, sulI/II, tet(D) |
| ACSSuTTmKG (ATM, CEF, CXM, CTX, CAZ, FEP) | 1 | aac(6′)-Iq | A1 | blaTEM, catI, aadA1, sulI/II, tet(D) |
| ACSSuTTmKG (ATM, CEF, CXM, CTX, CRO, FEP) | 1 | aac(6′)-Iq | A1 | blaTEM, catI, aadA1/A2, sulI/II, tet(D) |
| ACSuTTmKG (ATM, CEF, CXM, CAZ, CTX, CRO, FEP) | 1d | aac(6′)-Iq | A5 | blaTEM, catI, aadA1/A2, sulI/II, tet(D) |
| ASSuTKG (ATM, CEF, CXM, CAZ, CTX, CRO, FEP) | 1 | A1 | blaTEM, aadA1/A2, sulII, tet(D) |
a
Cephalosporin and aztreonam resistance profiles are shown in parentheses. A, ampicillin; C, chloramphenicol; S, streptomycin; Su, sulfamethoxazole; T, tetracycline; Tm, trimethoprim; K, kanamycin; G, gentamicin.
b
The integron cassette size was 1,269 bp.
c
“aadA1/A2” or “sulI/II” indicates the presence of both aadA1 and aadA2 or both sulI and sulII, homologous genes, respectively, within a strain.
d
This strain was intermediately resistant to streptomycin.