Infectious Dose 50

[AlgorithM]

If a direct question in the test is asked...which of these organism has the lowest ID50?
a. Yersinia pestis
b. Shigella dysenteriae
c. Coxiella burnetii

what is the best answer? the materials I'm studying re: these organism is not quite definite.

[instatewaiter]

I think it's shigella.

shigella has a very, very low infectious dose, something like 10 organisms.

[lifeAgift]

c. Coxiella burnetii ... it's ricketsia like