Volume 15, Number 12—December 2009
Dispatch
Novel Lineage of Methicillin-Resistant Staphylococcus aureus, Hong Kong
Table 1
Characteristics of methicillin-resistant Staphylococcus aureus isolates from pig carcasses in Hong Kong, 2008*
| Isolate | Sampling date | Resistance pattern | spa type | SCCmec type | PFGE pattern† | aroE allele | MLST type |
|---|---|---|---|---|---|---|---|
| K1 | Feb 22 | 3 | t899 | IVb | A1 | 3 | ST9 |
| G29 | Mar 11 | 4 | t899 | IVb | A2 | 3 | ST9‡ |
| 55 | Mar 27 | 1 | t899 | IVb | A1 | 3 | ST9‡ |
| 56 | 1 | t899 | V | B1 | 3 | ST9 | |
| 57 | 1 | t899 | V | B1 | 3 | ST9‡ | |
| 61 | 1 | t899 | V | B1 | 3 | ST9‡ | |
| 54 | 1 | t899 | V | B2 | 3 | ST9‡ | |
| B40 | Apr 15 | 1 | t899 | IVb | A1 | 3 | ST9‡ |
| B46 | 1 | t899 | IVb | A1 | 3 | ST9‡ | |
| B50 | 1 | t899 | IVb | A1 | 3 | ST9‡ | |
| B51 | 1 | t899 | IVb | A1 | 3 | ST9‡ | |
| B52 | 1 | t899 | IVb | A1 | 3 | ST9‡ | |
| B22 | 1 | t899 | V | B1 | 3 | ST9‡ | |
| B39 | 1 | t899 | IVb | A3 | 3 | ST9‡ | |
| B37 | 2 | t899 | IVb | A2 | 3 | ST9‡ | |
| B36 | 2 | t899 | IVb | A4 | 3 | ST9‡ |
*SCC, staphylococcal chromosome cassette; PFGE, pulsed-field gel electrophoresis; MLST, multilocus sequence typing. Resistance patterns: 1, oxacillin, penicillin, tetracycline, chloramphenicol, gentamicin, clindamycin, erythromycin, ciprofloxacin, cotrimoxazole; 2, oxacillin, penicillin, tetracycline, chloramphenicol, clindamycin , erythromycin, ciprofloxacin, fusidic acid; 3, oxacillin, penicillin, tetracycline, chloramphenicol, gentamicin, clindamycin, erythromycin, ciprofloxacin, cotrimoxazole, fusidic acid, 4, oxacillin, penicillin, tetracycline, chloramphenicol, clindamycin, ciprofloxacin, cotrimoxazole, fusidic acid.
†Closely or possibly related PFGE patterns according to the Tenover criteria (8) are designated by the same letter and different numbers.
‡ST9 was predicted on the basis of PFGE and spa and aroE typing.
