Abstract:When suspensions of psittacosis organisms were injected intracerebrally into groups of mice, a nearly linear relationship was observed between the concentration of the organisms injected and the mean time to death of the mice. Thirty-four psittacosis preparations were assayed and, by plotting the relationship between the reciprocal time to death for mice given the 10
-3
dilution of agent against the number of mouse intracerebral median lethal doses (MICLD
50
), a… Show more
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