TABLE 1.

Humoral immune responses to SIV gp120 in serum and secretory fluids at the time of challenge

Humoral immune response	Antibody to SIV gp120^a for:
Humoral immune response	Immunized macaques	Control macaques
Serum neutralizing antibody	3,181 ± 598	0
Serum IgG binding antibody	71,200 ± 11,741	0
Nasal IgG binding antibody	377 ± 120	10 ± 6
Vaginal IgG binding antibody	1,220 ± 292	0
Nasal IgA binding antibody	0.136 ± 0.042	0.007 ± 0.007
Saliva IgA binding antibody	0.138 ± 0.050	0.042 ± 0.017

↵a Mean titers ± the standard error of the mean are reported for neutralizing and IgG binding antibodies. Mean absorbance values ± standard error of the mean are reported for IgA antibodies.