The infectious dose
A)is the same for all microorganisms.
B)may be 10-100 cells for Salmonella.
C)is expressed as ID50.
D)is defined as the number of microbes necessary to ensure infection.
E)is expressed as ID50 AND is defined as the number of microbes necessary to ensure infection.

Question

Quizplus · Accepted Answer

The infectious dose can vary depending on the microorganism, and for Salmonella, it could be an ID50 of 10-100 cells. The infectious dose is commonly expressed as ID50, and it is defined as the number of microbes necessary to ensure infection. Therefore, both options C and E are correct, and the best choice is E, which includes both options.

The Infectious Dose