Induction of Cellular Immune Response by DNA Vaccine Coexpressing E. acervulina 3-1E Gene and Mature CHIl-15 Gene

Table 1

Experimental groups used in immunization and challenge experiments.

Group	Number	Immunization		Challenge at 28 days of age
		Primary immunization at 14 days of age	Secondary immunization at 21 days of age	Number of E. acervulina-sporulated oocysts
1	25	pcDNA-3-1E-mChIL-15 (100 μg)	pcDNA3-1E-mChIL-15 (100 μg)	5 × 10^4
2	25	pcDNA3.1 (100 μg)	pcDNA3.1 (100 μg)	5 × 10^4
3	25	TE buffer (pH 7.6)	TE buffer (pH 7.6)	5 × 10^4