Table 1.
spa type, CHDN MBC level, and carriage of qacAB and smr genes in 88 MRSA isolatesa
| spa type (nb) | No. of isolates with gene carriage and CHDN MBC (μg/ml) ofc: |
||||||||
|---|---|---|---|---|---|---|---|---|---|
| 5 |
10 |
20 |
|||||||
| neg | qac | smr | neg | qac | smr | neg | qac | smr | |
| t002 (43) | 12 | 2 | 1 | 12 | 3 | 6 | 3 | 0 | 4 |
| t003 (1) | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
| t004 (1) | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
| t007 (1) | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
| t008 (18) | 3 | 0 | 1 | 5 | 0 | 4 | 3 | 0 | 2 |
| t018 (1) | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| t032 (1) | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
| t037 (4) | 1 | 0 | 0 | 1 | 2 | 0 | 0 | 0 | 0 |
| t045 (6) | 2 | 0 | 0 | 4 | 0 | 0 | 0 | 0 | 0 |
| t059 (1) | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 |
| t062 (1) | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| t064 (4) | 0 | 0 | 1 | 0 | 0 | 2 | 0 | 0 | 1 |
| t1610 (1) | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
| t2235 (2) | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
| t242 (1) | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
| t437 (1) | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
| t640 (1) | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
| Total (88) | 21 (78) | 2 (7) | 4 (15) | 29 (62) | 5 (11) | 13 (28) | 7 (50) | 0 (0) | 7 (50) |
a
International comparison of spa types commonly associated with Canadian MRSA (CMRSA) strains (4): t002 is CMRSA2, USA100, USA800, and EMRSA-3; t008 is CMRSA9, CMRSA10, and USA300; t037 is CMRSA 3; t064 is CMRSA5 and USA500.
b
n, no. of isolates.
c
neg, negative. A value in parentheses is the percentage of total isolates with the indicated CHDN MBC (for an MBC of 5 μg/ml, n = 27; for an MBC of 10 μg/ml, n = 47; for an MBC of 20 μg/ml, n = 14).