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 most easily causes an infection?
A)E)coli O157:H7
B)Legionella pneumophila
C)Shigella
D)Treponema pallidum
E)The answer cannot be determined based on the information provided.

Question

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 most easily causes an infection?
A)E)coli O157:H7
B)Legionella pneumophila
C)Shigella
D)Treponema pallidum
E)The answer cannot be determined based on the information provided.

Quizplus · Accepted Answer

Legionella pneumophila has the lowest ID50 (1), indicating it requires the fewest number of organisms to cause infection in 50% of the population.

Table 152 -Which Organism in Table 15