Table 2.

Summary of Dose-Response Data From an Intramuscular Injection Model

Virus Dose, TCID50	Time to Onset of Motor Deficits Among Survivors After Infection, d Range	Motor Score Among Survivors 21 d After Infection, Mean ± SEM	Mortality, %	Motor Score Among Nonsurvivors, Mean ± SEM
104	2–3	6.1 ± 0.1	33	9.6 ± 0.4
103	2–5	5.6 ± 0.4	18	9.2 ± 0.3
102	3–7	3.8 ± 0.5	5	11.0 ± 0
10	4–9	1.7 ± 0.5	0	NA

Abbreviations: NA, not applicable; SEM, standard error of the mean; TCID₅₀, 50% tissue culture infectious dose.