October 30, 2010

PLAB Question 25

The incubation period for the onset of rubeola is approximately:

a) less than 10 minutes
b) 1-2 hours
c) 3-6 hours
d) 12-24 hours
e) 2-4 days
f) one to three weeks
g) one to three months
h) 6-12 months
i) 2-5 years
j) over 10 years

The correct answer is F

rubeola -> measles; the incubation period is generally 8 to 12 days from exposure to onset of symptoms; the average interval from exposure to appearance of the rash is 14 days.

In family studies, the average interval between appearance of rash in the source case and subsequent cases is 14 days, with a range of 7 to 18 days.

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