Table 152 -Which Organism in Table 15

Multiple Choice

Table 15.2
$$\begin{array} { | l | c | } \hline \text { Bacterium } & \text { ID50 } \\\hline \text { E. coli } \mathrm { O } 157 : \mathrm { H } 7 & 20 \\\hline \text { Legionella pneumophila } & 1 \\\hline \text { Shigella } & 10 \\\hline \text { Treponema pallidum } & 57 \\\hline\end{array}$$
-Which organism in Table 15.2 causes the most severe disease?

A) E) coli O157:H7
B) Legionella pneumophila
C) Shigella
D) Treponema pallidum
E) It cannot be determined from the information provided.