TABLE 3.
Organisms showing variations in colonial morphology and growth characteristics on media containing SB, PB, and GB
| Organism or test | Medium/incubation conditions | Variation in test or growth characteristics
|
||
|---|---|---|---|---|
| SB | GB | PB | ||
| H. influenzae | CHAa/CO2 | 5 mm | 4 mm | 3 mm |
| H. parainfluenzae | 3 mm | 2 mm | 0.5 mm | |
| H. haemolyticus | 5 mm | 4 mm | 3 mm | |
| CAMP test | BA/CO2 | Arrowhead hemolysis | Smaller arrowhead hemolysis | No synergistic hemolysis |
| Reverse CAMP test | BA/anaerobic | Arrowhead hemolysis | Small, oval hemolysis; no arrowhead | Arrowhead narrower than on SB |
| E. faecium (one isolate) | BA/anaerobic | Alpha-hemolytic | Nonhemolytic | Nonhemolytic |
| C. perfringens | Fastidious anaerobic agar/anaerobic | Double zone of hemolysis (second zone, 6 mm) | No double zone | Double zone of hemolysis (second zone, 3 mm) |
a
SB, PB, GB media heated to 100°C for 15 min.