Table 1. Haemolytic activity of various serotypes (n = 239) of A. actinomycetem-comitans determined by the haemolysis method.

	minimal	average	high	total
serotypes	n (%)	n (%)	n (%)	n
a	43 (75.4)	14 (24.6)		57
b	1 (2.2)	18 (39.1)	27 (58.7)	46
c	83 (83.0)	17 (17.0)		100
d	10 (83.3)	2 (16.7)		12
e	5 (83.3)	1 (16.7)		6
f	10 (55.5)	7 (38.9)	1 (5.6)	18