Table 15.2 $\begin{array} { | l | l | }
\hline \text { Bacterium } & \text { ID } 50 \
\hline \text { E. coli O157:H7 } & 20 \
\hline \text { Legionella pneumophila } & 1 \
\hline \text { Shigella } & 10 \
\hline \text { Treponema palldum } & 57 \
\hline
\end{array}$
-Which organism in Table 15.2 causes the most severe disease?
A) Shigella
B) E. coli O157:H7
C) Legionella pneumophila
D) Treponema pallidum
E) It cannot be determined from the information provided.

Question

Table 15.2 $\begin{array} { | l | l | } 
\hline \text { Bacterium } & \text { ID } 50 \
\hline \text { E. coli O157:H7 } & 20 \
\hline \text { Legionella pneumophila } & 1 \
\hline \text { Shigella } & 10 \
\hline \text { Treponema palldum } & 57 \
\hline
\end{array}$
-Which organism in Table 15.2 causes the most severe disease?
A) Shigella
B) E. coli O157:H7
C) Legionella pneumophila
D) Treponema pallidum
E) It cannot be determined from the information provided.

Quizplus · Accepted Answer

The table provides ID50 values, which indicate the infectious dose required to infect 50% of a population. A lower ID50 value suggests higher infectivity, but it does not directly indicate the severity of the disease caused by the organism. Therefore, the severity of the disease cannot be determined from the ID50 values alone.

Table 152 -Which Organism in Table 15