Volume 10, Number 4—April 2004
Dispatch
Ruling Out Bacillus anthracis
Joseph Papaparaskevas*, Dimitra P. Houhoula*, Maria Papadimitriou*, Georgios Saroglou†, Nicholas J. Legakis*, and Loukia Zerva*
Table
Numbers (%) of environmental Bacillus spp. isolates exhibiting various types of hemolysis on human, sheep, and horse blood agar plates at 24 and 48 hours of incubation
| Incubation time | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 24 h | 48 h | |||||||||||
| Type of hemolysis | Humana | Sheepa | Horsea | Human | Sheep | Horse | ||||||
| No | (%) | No | (%) | No | (%) | No | (%) | No | (%) | No | (%) | |
| α | 1 | (1.4) | 5 | (6.9) | 0 | (0) | 0 | (0) | 0 | (0) | 1 | (1.4) |
| γ | 10 | (13.9) | 16 | (22.3) | 10 | (13.9) | 4 | (5.6) | 9 | (12.5) | 2 | (2.8) |
| Total β | 61 | (84.7) | 51 | (70.8) | 62 | (86.1) | 68 | (94.4) | 63 | (87.5) | 69 | (95.8) |
| Strong β | 55 | (76.4) | 41 | (56.9) | 55 | (76.4) | 65 | (90.3) | 55 | (76.4) | 66 | (91.6) |
| Weak β | 6 | (8.3) | 10 | (13.9) | 7 | (9.7) | 3 | (4.1) | 8 | (11.1) | 3 | (4.2) |
| Total | 72 | 72 | 72 | 72 | 72 | 72 | ||||||
aHuman, sheep and horse refer to the respective blood agars.
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