Table 3.

Peak viremia (log₁₀ plaque-forming units/mL) as a function of day infected with Japanese encephalitis virus for chicks and ducklings infected between 2 and 42 days post-hatch^*

Bird	Day post-inoculation	Day of infection post-hatch
		2	5	7	10	14	21	28	42
Chicks	1	3.5	2.7	3.3	2.0	1.5	2.1	< 1.0	< 1.0
	2	5.0	4.3	3.8	2.7	3.0	2.3	1.3	1.4
	3	4.7	4.0	3.7	3.2	3.0	0.5	< 1.0	< 1.0
	4	4.1	1.8	< 1.0	< 1.0	< 1.0	< 1.0	< 1.0	< 1.0
	5	3.2	< 1.0	< 1.0	< 1.0	< 1.0	< 1.0	< 1.0	< 1.0
Ducklings	1	2.6	2.4	1.3	< 1.0	1.5	< 1.0	< 1.0	< 1.0
	2	6.3	5.2	3.2	3.4	2.9	1.9	2.3	< 1.0
	3	6.5	2.9	1.6	< 1.0	1.1	< 1.0	< 1.0	< 1.0
	4	3.6	< 1.0	< 1.0	< 1.0	< 1.0	< 1.0	< 1.0	< 1.0
	5	< 1.0	< 1.0	< 1.0	< 1.0	< 1.0	< 1.0	< 1.0	< 1.0

^*Values are the highest daily virus titer measured in samples collected 1–5 days after virus inoculation.