Chapter 17 Diagnosing Infections

Multiple Choice Questions 1. Which of the following is involved in the in vitro diagnostic testing of serum? A. mycology B. hematology C. serology D. histology E. virology 2. The property of a test to detect even small amounts of antibodies or antigens that are test targets is: A. cross-reactions. B. agglutination. C. precipitation. D. specificity. E. sensitivity. 3. The property of a test to detect only a certain antibody or antigen, and not to react with any others, is: A. cross-reactions. B. agglutination. C. precipitation. D. specificity. E. sensitivity. 4. Whole antigens are detected in which type of test? A. cross-reactions B. agglutination C. precipitation D. specificity E. sensitivity 5. Soluble antigens are detected in which type of test? A. cross-reactions B. agglutination C. precipitation D. specificity E. sensitivity 6. Affixing antigen to an inert particle such as a latex bead is sometimes used in which type of test? A. cross-reactions B. agglutination C. precipitation D. specificity E. sensitivity 7. A serum titer involves: A. serially diluting a serum sample. B. determining the lowest dilution of serum that produces a visible reaction. C. determining the highest dilution of antigen that produces a visible reaction. D. the Western blot method. E. None of the above mentioned choices. 8. Precipitation tests involve all of the following, except: A. they rely on formation of visible clumps for detection. B. they include the VDRL test for syphilis. C. they are often performed in agar gels. D. they can be done in a test tube by carefully adding antiserum over antigen solution. E. a cloudy or opaque zone developing where antigen and antibody react