TABLE 1.
Results of PCR amplification and capsular swelling reactions with serogroup 6 factor antisera for 189 isolates of S. pneumoniae
| PCR primer set (product size [bp]) | No. of isolates with capsular swelling reaction with factor antiseraa |
||
|---|---|---|---|
| 6b only | 6c only | 6b and 6d | |
| 5101-3101 (958) | 48 | 6 | — |
| 5101-3101 (1,267) | 1 | 36 | — |
| 5106-3101 (1,800) | — | — | 98 |
a
All isolates reacted with serogroup 6 antiserum, while additional reaction to factor antisera indicate the following: 6b, serotype 6A; 6c, serotype 6B; 6b and 6d, serotype 6C. —, no isolates had these characteristics.