Table 2. Analysis of PPRV neutralization activity in sera from vaccinated and non vaccinated sheep.

Neutralization titera
Treatmentb	Sheep #	D0c	D21d	D42d	D3PChe	D5PChe	D7PChe	D11PChe	D13PChe
PBS	1	<2	<2	<2	<2	16	40	160	200
	2	<2	<2	<2	<2	16	80	80	200
	3	<2	<2	<2	<2	16	80	160	200
	4	<2	<2	<2	<2	16	80	320	400
Ad5	5	<2	<2	<2	<2	16	80	160	200
	6	<2	<2	<2	<2	4	80	80	400
	7	<2	<2	<2	<2	16	160	160	400
	8	<2	<2	<2	<2	16	20	80	100
Ad5-PPRV-F	9	<2	4	4	8	64	160	320	400
	10	<2	4	8	8	32	160	160	200
	11	<2	4	8	8	64	160	320	400
	12	<2	4	4	64	64	160	320	400
Ad5-PPRV-H	13	<2	4	4	16	64	160	320	400
	14	<2	2	4	4	8	20	80	800
	15	<2	<2	16	16	64	160	320	800
	16	<2	2	4	4	64	160	320	800

^aSN titers were determined against Nigeria 75/1 PPRV strain and expressed as the reciprocal of the last dilution of serum that neutralized 50% of the virus-specific cytopathic effect in flat bottom 96 well plates.

^bIntramuscular inoculations of PBS, Ad5 or vaccine vectors as described in the Material and Methods section (See Table 1).

^cSera obtained from uninfected sheep.

^dSera obtained from vaccinated sheep after 21 days post first immunization and 21 days post second immunization (42 days post first immunization).

^eSera obtained from infected sheep after days 3,5,7,11,13 post challenge.