Table 1.
Prevalence of superantigen and superantigen-like open reading frames in blood and colonising isolates
| All (n = 51)a | Blood (n = 22)a | Colonising (n = 29)a | P-valueb | |
|---|---|---|---|---|
| sea | 8 (15.7) | 2 (9.1) | 6 (20.7) | 0.26 |
| seb | 1 (1.9) | 0 (0) | 1 (3.4) | nd |
| sec | 6 (11.8) | 3 (13.6) | 3 (10.3) | 0.72 |
| sed | 1 (1.9) | 0 (0) | 1 (3.4) | nd |
| see | - | - | - | |
| tst | 8 (15.7) | 5 (22.7) | 3 (10.3) | 0.23 |
| seg | 31 (60.8) | 12 (54.5) | 19 (65.5) | 0.43 |
| seh | 3 (5.9) | 1 (4.5) | 2 (6.9) | 0.72 |
| sei | 33 (64.7) | 12 (54.5) | 21 (72.4) | 0.19 |
| selj | 1 (1.9) | 0 (0) | 1 (3.4) | nd |
| selk | - | - | - | |
| sell | 6 (11.8) | 3 (13.6) | 3 (10.3) | 0.72 |
| selm | 33 (64.7) | 12 (54.5) | 21 (72.4) | 0.19 |
| seln | 33 (64.7) | 12 (54.5) | 21 (72.4) | 0.19 |
| selo | 33 (64.7) | 12 (54.5) | 21 (72.4) | 0.19 |
| selp | 6 (11.8) | 4 (18.2) | 2 (6.9) | 0.22 |
| selq | - | - | - | |
| selr | 1 (1.9) | 0 (0) | 1 (3.4) | nd |
| sels | - | - | - | |
| selt | - | - | - | |
| selu c | 21 (41.2) | 8 (36.4) | 13 (44.8) | 0.54 |
| selv | - | - | - | |
| selw d | 4 (7.8) | 2 (9.1) | 2 (6.9) | 0.77 |
| selx | 39 (76.4) | 17 (77.3) | 22 (75.8) | 0.91 |
aNo. of PCR-amplified and sequenced genes, percentages are in parentheses
bPearson’s chi-squared test (χ 2) performed for distribution of in-frame genes (n > 1)
c selu and selu2 combined as selu
d selw with identified ATG as start codon