NOMBRE FECHA QUIZ EXAM II INMUNOLOGIA Choose the correct answer: 1. Paired sera

Question

NOMBRE FECHA QUIZ EXAM II INMUNOLOGIA Choose the correct answer: 1. Paired sera are obtained from a patient with probable dengue fever at the time of onset and again 3 of the tests are considered diagnostic if: weeks later. The results a. first and second antibody titers are equal b. first antibody titer is 2x the second c. first antibody titer is 4x the second d. second antibody titer is 4x the first 2. The results of an agglutination test antibody titration are as follows. This set of reactions most likely resulted from: a. inadequate pippeting technique b. postzonal reaction c. prozonal reaction d. low antibody concentration 3. In the interpretation of tests for some infectious diseases, which of the following is of greater diagnostic importance? a. secondary anamnestic reactions by heterologous antigens b. history of immunodeficiency c. history of previous vaccinations d. rise in titer of the patient's serum 4. The following results are from a patient's titer performed on acute and convalescent sera using a two-fold serial dilution: Date of test: November 24, 2012 Acute serum titer: 1:8 convalescent serum titer: 1:32 The best interpretation of these results is: a. patient seems to have an active infection b. patient is not infected c. tests should be repeated d. variation in titer invalidates results

Explanation / Answer

Answers of the questions are

1. D

2.c

3. c

4. a

5.a

6.a

7.c

8.d

9.d

10. c

11.c

12.a

13.b

14.c

15.c

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