TABLE 4.

Antibody levels to N. gonorrhoeae MS11 in serum and urethral swabs from noninfected and infected males

Sample	Antibody isotype	Median antibody level (ng/ml) (range) [n]
		Visit 1		Visit 2
		Noninfected	N. gonorrhoeae infected	Noninfected	N. gonorrhoeae infected
Serum	IgA1	621 (86–11,728) [13]	719 (118–7,161) [58]	636 (300–3,957) [4]	845 (242–4,319) [20]
	IgA2	0 (0–1,319) [13]	179 (0–3,392) [58]	97 (0–328) [4]	178 (0–1,477) [20]
	IgG	23,736 (9,177–156,400) [13]	19,429 (4,400–100,828) [58]	28,720 (9,538–56,338) [4]	20,981a (13,349–117,894) [20]
Urethral swab	IgA1	0 (0–99) [14]	0 (0–170) [36]	0 [5]	0 (0–128) [13]
	IgA2	77 (0–354) [14]	213 (0–432) [36]	0 [5]	0 (0–300) [13]
	IgG	0 (0–442) [14]	119 (0–685) [36]	0 [5]	105 (0–450) [13]

^aP = 0.0476 (Wilcoxon signed-rank test) compared with IgG antibody levels at visit 1.