TABLE 1.

Complement-mediated SBA with pooled phoP mouse serum against different meningococcal strains

Meningococcal strain	Typing antigen			SBA titer (≥50% killing)	Maximum observed killing (%)
	Group	Type	Subtype
L91543 (wild type)	C	2a	2	10,240	100
phoP mutant	C	2a	2	10,240	100
M97 250613	C	2a	2,5	1,024	98
M97 250611	C	2b	2,5	512	69
M97 250631	C	4	4	64	83
M97 250609	B	4	4	64	66
H44/76	B	15	7,16	16	70
MC58	B	15	7,16	256	66
L92/231	W135	NTa	6	512	74
L92/85	Y	NT	2	1,024	100

^aNT, nontypeable.