Table III.

Mean concentrations of PRRSV RNA detected in aerosol samples over time

	Collection day; concentration of PRRSV RNA (TCID50/mL)
Agent(s) inoculated; animal age (mo)	1	3	5	7	9	11	13	15	17	19	21
PRRSV MN-30100
2	0	0.04	0.4	0.02	0	0	0	0.06	0	0.02	0
6	0	0.1	0.3	0.05	0.1	0	0	0	0	0	0
PRRSV MN-30100 + M. hyopneumoniae
2	0	0	0	0.03	0.03	0.03	0	0	0	0	0
6	0	0	0	0	0	0.05	0	0	0	0	0
PRRSV MN-184
2	0	0	0.1	0	0.02	0.02	0.03	6.0	0.02	0.2	1.0
6	0	0.2	0.04	0	0	0.02	1.04	0.3	0.1	0.1	0
PRRSV MN-184 + M. hyopneumoniae
2	0.4	0	10.0	3.3	266	NC	0.4	0.1	152	NC	4.0
6	0	1.14	1.0	0.03	0.1	NC	0	0	0.03	0	0