TABLE 8.

Chlamydia trachomatis antigens of diagnostic value

Antigen size (kDa)	% of individuals with serum antibodies to Chlamydia trachomatis antigens (high-intensity responses only)a
	IgG			IgA
	Patients with urogenital infection (n = 42)	Healthy blood donors (n = 31)	P	Patients with urogenital infection (n = 42)	Healthy blood donors (n = 31)	P
77	19	0	0.01	2	0	NS
71	30	0	0.0006	12	0	0.047
64	44	6	0.0006	16	0	0.017
61	47	10	0.0006	12	3	NS
52	35	0	0.0002	21	3	0.025
36	33	3	0.0017	21	0	0.0059
21	14	3	NS	9	0	NS
18	28	13	NS	37	0	0.0001
13	40	0	<0.0001	37	0	0.0001

^aNS, not significant.