Experimental infection of Bama miniature pigs with a highly virulent classical swine fever virus

Table 1 Clinical outcome of the pigs following viral challenge.

Groups	No. of animals with fever (≥ 40.5°C)	No. of days to fever onset	Fever frequency during the trial	Survival rates
A	5/5	2	26/56	0/5
B	5/5	2	21/51	0/5
C	5/5	3	18/58	0/5
D	3/3	10	3/11	2/3
E	0/2	-	0/30	2/2

Twenty specific-pathogen-free Bama miniature pigs were randomly divided into five groups. Groups A, B and C (n = 5) were inoculated i.m. with 10⁴, 10⁵ and 10⁶ TCID₅₀ CSFV Shimen strain, respectively. Three non-inoculated pigs were housed in the same pen and served as in-contact animals. Two uninfected control pigs were housed in a separate pen. Clinical outcome, fever frequency and survival rates after viral challenge were calculated.