Table 3.

Serum bactericidal assay. Bacterial killing ^a and serum titers ^b.

	N. gonorrhoeae Strains
Sera Groups	F62	U08401	U08402	FA1090 c
NHS alone	3%	6%	3%	0%
Adjuvant control	0% (1/10)	14% (1/10)	8% (1/10)	0% (1/10)
NGO0416	9% (1/10)	28% (1/10)	8% (1/10)	30% (1/5)
NGO0690	53% (1/40)	50% (1/10)	46% (1/20)	45% (1/10)
NGO0948	50% (1/10)	50% (1/10)	52% (1/10)	57% (1/5)
NGO1043	46% (1/10)	55% (1/10)	48% (1/10)	13% (1/5)
NGO1215	17% (1/10)	57% (1/10)	23% (1/10)	0% (1/5)
NGO1701	50% (1/40)	55% (1/10)	46% (1/20)	52% (1/5)

^a % inverse of survival (CFU T0/CFU T30); ^b reciprocal of the sera dilution that kills 50% or more bacteria; ^c 20% NHS.