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. 2004 Apr;10(4):732–735. doi: 10.3201/eid1004.030544

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.