TABLE 3.

Postchallenge efficacy—clinical signs after challenge with virulent S. choleraesuis P92-091^e

Strain or group	Timea	Mortality (%)b	Morbidity score (%)b	Diarrhea score (%)b	% of pigs culture positive (92-091)	ADG (kg)c	Mean temp (°C)d
Nonvaccinated, challenged	Pre	0	0	0		0.73	39.5
	Post	0	16.1*	50.0*	50.0	0.69*†	41.3*
Nonvaccinated, nonchallenged	Pre	0	0	0		0.69	39.8
	Post	0	0†	0†	0	0.99‡	40.2†
NOBL SC-54	Pre	0	0	0		0.64	39.6
	Post	0	3.6†	14.9‡	62.5	0.89‡	41.3*
χ3781	Pre	0	0	0		0.65	39.5
	Post	0	0†	11.9‡§	0	0.94‡	40.1†‡
χ3923	Pre	0	0	0		0.65	39.7
	Post	0	0†	7.7†§	0	0.88*‡	40.8§
χ4186	Pre	0	0	0		0.66	39.6
	Post	0	1.2†	3.6†	25.0	1.00‡	40.4‡§
χ4497	Pre	0	0	0		0.70	39.3
	Post	0	0.6†	10.7‡§	12.5	0.89‡	40.3§
χ4522	Pre	0	0	0		0.69	39.7
	Post	0	17.3*	43.5*	62.5	0.54†	41.7*
χ4814	Pre	0	0	0		0.70	39.6
	Post	12.5	19.1*	44.4*	87.5	0.63†	41.3*

^aPre, mean values 1 week prior to challenge; post, mean values 1 week postchallenge. 

^bMaximum possible severity is 100%. 

^c“Pre” values are for vaccination period; “post” values are for period from challenge to necropsy (or death). 

^d“Pre” values are the mean temperatures for the 4 days prior to challenge; “post” values are the mean maximum temperatures for the postchallenge period. 

^eValues in the same column with different superscripts (*, †, ‡, and §) are significantly different (P < 0.05).