Table 1.

Serum Virus Titers Upon Infection with Lelystad Virus

	Days post-inoculation
Pig no.	0	3	5	7	10	14	21	28
1	<0.96	1.97	3.80	1.97	2.80	<0.96	<0.96	<0.96
2	<0.96	3.80	3.63	2.07	2.80	<0.96	2.30	<0.96
3	<0.96	2.05	3.30	<0.96	3.30	1.80	<0.96	<0.96
4	<0.96	1.97	3.80	0.96	2.80	2.53	<0.96	<0.96
5	<0.96	1.97	3.67	<0.96	3.63	4.30	2.86	<0.96
6	<0.96	1.97	2.63	1.97	3.30	<0.96	<0.96	<0.96

Six pigs were inoculated intranasally with 10⁶ TCID₅₀ of Lelystad virus and bled at different time points post-infection. Serum virus titers (log₁₀ TCID₅₀/mL) were determined by titration on primary alveolar macrophages.