You give human volunteers doses of a fungus that will cause a rash on the skin (

Question

You give human volunteers doses of a fungus that will cause a rash on the skin (undergrads will do anything for a few bucks). Here's the dosage of cells and how many people developed the rash: · 10 fungal cells = 0% of volunteers got rash .100 fungal cells = 5% of volunteers got rash · 500 fungal cells = 35% of volunteers got rash .1000 fungal cells-65% of volunteers got rash · 5000 fungal cells = 100% of volunteers got rash What is the approximate ID50 for the fungus with respect to its ability to infect the skin? Oa. 500 fungal cells Ob.750 fungal cells Oc. 1000 fungal cells Od 2500 fungal cells e. 5000 fungal cells

Explanation / Answer

ID35 - Infectious dose for 35% of the test population (volunteers) is 500 fungal cells.

ID65 - Infectious dose for 65% of the volunteers is 1000 fungal cells

Therefore, ID50 would be in-between the two which is b. 750 fungal cells

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