Table 1. Experimental design with vaccination and challenge.

Group	No. of pigs	Vaccine	Vaccination (3 wk of age)	Challenge (7 wk of age)
G1 (PCV2b+MHP)	4	Myco-X	2.0 mL, intramuscularly	PCV2d
G2 (PCV2d+MHP)	4	Myco-XD	0.5 mL, intradermally	PCV2d
2dC	4	PBS	2.0 mL, intramuscularly	PCV2d
NC	4	PBS	2.0 mL, intramuscularly	ND

PCV2b, porcine circovirus type 2b; MHP, Mycoplasma hyopneumoniae; PCV2d, porcine circovirus type 2d; G1, Myco-X PCV2d challenge (Myco-X-vaccinated); G2, Myco-XD PCV2d challenge (Myco-XD-vaccinated); 2dC, PCV2d challenge control (unvaccinated challenged); NC, negative control (unvaccinated unchallenged); PBS, phosphate-buffered saline; ND, not done.