Table 1.

Neutralizing antibody titers in immunized guinea pigs.

Time	Guinea pigs (no.)	Neutralizing antibodies titera
		Group A	Group B	Group C
0 dpv	1	<0.6	<0.6	<0.6
	2	<0.6	<0.6	<0.6
	3	<0.6	<0.6	<0.6
14 dpv (primary)	1	0.9	0.9	<0.6
	2	1.5	0.75	<0.6
	3	1.2	0.9	<0.6
28 dpv (primary)	1	0.9	0.9	<0.6
	2	1.8	1.2	<0.6
	3	2.1	1.2	<0.6
14 dpv (boosted)	1	1.5	1.5	<0.6
	2	2.1	1.5	<0.6
	3	2.1	1.5	<0.6
28 dpv (boosted)	1	1.8	1.2	<0.6
	2	1.5	1.5	<0.6
	3	2.1	1.2	<0.6

Neutralizing antibody determinations were performed with sera sampled at day 0 (prior to vaccination), day 14 and day 28 after the primary and booster vaccinations. Serum samples were obtained from three guinea pigs from each group. dpv: days post vaccination.

^aLog10 reciprocal antibody titers to neutralize 100 TCID₅₀ of homologous FMDV in 50% of the wells.