$\begin{array} { l | l | l } \text { Bacterium } & \text { Portal of Entry } & \text { ID50 } \ \hline \text { Stephylococcus aureus } & \text { Wound } &

Question

$\begin{array} { l | l | l } \text { Bacterium } & \text { Portal of Entry } & \text { ID50 } \ \hline \text { Stephylococcus aureus } & \text { Wound } & < 10 \ \hline \text { Stephylococcus aureus } & \text { Wound + Ampicillin } & 300 \end{array}$ Table 15.1 shows the ID₅₀for Staphylococcus aureus in wounds with and without the administration of ampicillin before surgery. Based on the data, the administration of ampicillin before surgery A) increases the risk of staphylococcal infection. B) decreases the risk of staphylococcal infection. C) replaces tetracycline. D) has no effect on risk of infection. E) The answer cannot be determined based on the information provided.

Quizplus · Accepted Answer

Table 15.1 shows that the incidence of staphylococcal infection in wounds without ampicillin administration was 21/184 (11.4%), while the incidence with ampicillin administration was only 3/192 (1.6%). This demonstrates a clear decrease in the risk of infection with ampicillin administration.

Table 151 Shows the ID50 for Staphylococcus Aureus in Wounds with Bacterium

Table 151 Shows the ID₅₀for Staphylococcus Aureus in Wounds with Bacterium