TABLE 3.

Percentages of individuals with serum antibodies to recombinant or synthetic Chlamydia antigens as determined by ELISA

Antigen (source)	Serum antibody response	% of patients with acute C. trachomatis urogenital infection (n = 45)	% of healthy blood donors (n = 31)a	Statistical analysis (chi-square test) between both groupsb
LPS (Medac)	IgG	84	52	9.62; P = 0.0019
	IgM	9	3	NS
	IgA	62	23	11.61; P = 0.0007
MOMP (Labsystems)	IgG	58	32	4.80; P = 0.029
	IgA	47	16	7.61; P = 0.0058
Recombinant proteins prepared in our laboratory
hsp70	IgG	29	17	NS
	IgA	2	0	NS
hsp60	IgG	62	20	13.64; P = 0.0002
	IgA	24	13	NS
pgp3	IgG	53	20	8.87; P = 0.0029
	IgA	9	3	NS
MIP	IgG	20	7	NS
	IgA	0	0	NS
hsp10	IgG	2	3	NS
	IgA	2	0	NS

^aOnly 30 healthy blood donors were tested for serum antibodies to recombinant proteins. 

^bNS, not significant.