A pregnant woman had contact with her nephew who was just diagnosed with a rubella infection.Acute and convalescent samples were taken,which resulted in an acute titer of 1:16 and a convalescent titer of 1:32.Which one of the following comments explains the risk to the fetus?
A)The risk is low;a fourfold rise in titer is not present.
B)The risk is high;more than a fourfold rise is present in titer.
C)The risk is high because both titers are elevated.
D)Rubella is not a congenital disease;therefore the test should not have been ordered.

Question

Quizplus · Accepted Answer

No fourfold rise is present in titer (two doubling dilutions);in addition,the pregnant woman is immune with a titer of greater than 1:8.Therefore,the risk to the developing fetus is low since the pregnant woman has enough antibodies to cross the placenta and protect the fetus.

A Pregnant Woman Had Contact with Her Nephew Who Was