Table 1. Virus titers in nasal swabs and BALF from experimentally infected pigs 5 days after infection*.

Inoculum/pig no.	A/SW/MI/PU243/04 (TCID50/mL)					A/SW/MI/PU542/04 (TCID50/mL)
	108	109	111	114	127	3	110	112	113
Nasal swab	104.3	104.7	105	103	105.8	105.8	105.6	104.5	104.1
BALF	106.6	>107.3	107	>107.6	106.3	>107.5	106.5	107.6	106.9

*BALF, bronchoalveolar lavage fluid; 50%TCID₅₀, 50% tissue culture infective dose.