Table 2.
Antibiotic resistance and transposon genes identified among 138 S. pneumoniae nasopharyngeal isolates from healthy young children.
| Serotype (number of strains) | Resistance pattern | Genes detected by PCR | Presumptive transposons | ||
|---|---|---|---|---|---|
| Resistance genes | Transposon genes | Tn916 family element | Tn5252-like element | ||
| 23F (16) | Te | tet(M) | int/xis916 | Tn916 | ICESp23FST81-like |
| 19F (22), 23F (1) | TeC | tet(M), cat pC194 | int/xis916, intICE | Tn916 | |
| 6B (10), 14 (1), 19F (2), 23F (4) | ECcTe | tet(M), erm(B) | int/xis916 | Tn6002 | |
| 6B (2), 23F (1) | ECcTe | tet(M), erm(B), mef(E) | int/xis916 | Tn2010 | |
| 6B (1) | ECcTe | tet(M), erm(B), mef(E) | int/xis916, tnpA/tnpR | Tn2017 | |
| 6B (18), 19F (43), 23A (2), 23F (1) | ECcTeC | tet(M), erm(B), cat pC194 | int/xis916, int/xisTn5252 | Tn6002 | Tn5252 |
| 6B (1), 19F (5) | ECcTeC | tet(M), erm(B), cat pC194 | int/xis916, int/xisTn5252, junTn5253 | Tn6002 | Tn5253-like |
| 6B (1), 19F (3) | ECcTeC | tet(M), erm(B), mef(E), cat pC194 | int/xis916, int/xisTn5252 | Tn2010 | Tn5252 |
| 6B (2) | ECcTeC | tet(M), erm(B), cat pC194 | int/xis916, tnpA/tnpR, int/xisTn5252 | Tn3872 | Tn5252 |
| 19F (2) | ECcTeC | tet(M), erm(B), cat pC194 | int/xis916, intICE | Tn6002 | ICESp23FST81-like |
E: erythromycin, Cc: clindamycin, Te: tetracycline, and C: chloramphenicol.