TABLE 3.

Effect of preadsorbing with MBM cells on the titers of FIV-binding antibodies exhibited by vaccinated, mock-immunized, and control sera

Cat group	Time of serum collection	ELISA antibody titera with:
		Whole FIV		FIV gp
		Untreated	Adsorbed	Untreated	Adsorbed
FCPLB	Peakb	5,200	1,600	4,800	3,000
	First challenge	2,500	800	3,600	800
	Second challengec	1,200	600	1,200	600
ID-1	Peak	8,000	1,600	5,400	2,500
	First challenge	4,400	1,600	4,200	1,800
	Second challenge	1,400	1,000	1,800	1,200
ID-2	Peak	4,200	1,000	5,200	1,800
	First challenge	2,900	800	4,000	1,200
	Second challenge	1,400	800	1,600	800
ID-3	Peak	12,000	3,200	18,000	3,200
	First challenge	6,200	1,800	12,000	2,200
	Second challenge	2,200	1,000	2,000	1,600
Mock-1	Peak	3,000	<200	2,200	<200
	First challenge	1,400	<200	1,400	<200
	Second challenge	800	<200	800	<200
Mock-2	Peak	2,400	<200	2,500	<200
	First challenge	2,000	<200	2,000	<200
	Second challenge	400	<200	400	<200
Infectedd	12 mo post infection	10,000	10,000	10,000	10,000
Uninfected, unvaccinated		<200	<200	<200	<200

^aThe experiment was performed twice with comparable results.

^bPeak, four months after initiation of immunization.

^cSecond challenge, animals that had escaped infection after the first challenge alone.

^dPool of sera 753, 1694, and 2508 described in Table 2.