Table 1

IgG antibodies against GBS serotypes Ia, Ib, II and III in mg/l and concentration of complement component C3c in sera of adults, premature, and full term neonates

Serum	No	IA^1-150	IB^1-150	II^1-150	III^1-150	C3c^1-151
Adult	Pooled	0.75	1.3	0.55	1.6	1.00
Full term neonatal	20	0.5	0.7	0.5	0.8	1.06
	23	< 0.1	< 0.1	< 0.1	> 0.1	0.95
	24	0.8	5.9	1.7	10.2	1.17
	28	1.3	1.2	0.7	2.6	1.06
	29	< 0.1	0.6	< 0.1	0.6	0.84
	50	0.8	3.3	1.2	5.4	0.84
	57	0.8	4.3	1.6	6.6	1.23
	61	0.7	0.6	0.5	0.6	1.06
Preterm neonatal	520	< 0.1	< 0.1	0.8	3.9	0.64
	541	1.0	2.1	1.6	> 10	0.79
	542	< 0.1	< 0.1	< 0.1	< 0.1	0.79
	568	0.6	0.5	< 0.1	1.3	0.69

↵1-150 Titres of GBS serotype specific IgG antibodies expressed in mg/l.
↵1-151 Concentration of complement C3c in g/l; reference range 0.55-1.22 g/l.