Table 3.
Staphylococcal superantigen (SAg) genes observed in coagulase-negative staphylococcal isolates from bovine intramammary infections
| Speciesa | No. of isolates |
No. of SAg gene-positive isolates |
|||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SAg genesb |
sea | seb | sec | sed | see | seg | seh | sei | selj | selk | sell | selm | seln | selo | selp | selq | selr | selu | tst1 | ||
| S. chromogenes | 190 | 42 | 4 | 33 | 1 | 1 | 0 | 0 | 0 | 0 | 2 | 4 | 0 | 0 | 33 | 0 | 0 | 37 | 1 | 3 | 0 |
| S. xylosus | 24 | 11 | 0 | 9 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 9 | 1 | 0 | 9 | 0 | 1 | 0 |
| S. haemolyticus | 16 | 6 | 0 | 3 | 0 | 1 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | 0 | 3 | 0 | 0 | 3 | 0 | 0 | 0 |
| S. sciuri subsp. | 9 | 7 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 1 | 0 | 0 | 2 | 0 | 0 | 2 | 0 | 0 | 0 |
| carnaticus | |||||||||||||||||||||
| S. hyicus | 8 | 8 | 0 | 4 | 2 | 3 | 0 | 0 | 0 | 0 | 0 | 7 | 0 | 0 | 4 | 0 | 0 | 4 | 0 | 0 | 0 |
| S. simulans | 7 | 5 | 0 | 3 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | 3 | 0 | 0 | 0 |
| S. caprae | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| S. epidermidis | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| S. succinus | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 0 |
| S. capitis | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| S. hominis | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Total | 263 | 82 | 4 | 55 | 3 | 6 | 0 | 2 | 2 | 5 | 5 | 12 | 0 | 0 | 55 | 1 | 0 | 59 | 1 | 4 | 0 |
a
The species was determined by partial 16S rRNA gene sequence analysis except S. caprae and S. capitis which were determined by partial rpoB gene sequence analysis.
b
No. of isolates that were positive for at least one SAg gene.