A Patient Was Suspected of Having a Rickettsial Infection After

question 18

Multiple Choice

A patient was suspected of having a rickettsial infection after hiking in the Rocky Mountains.A Weil-Felix test was performed,which resulted in no agglutination observed.Which one of the following statements explains this discrepancy?

• A)Detection of rickettsial infections using strains of Proteus is not as specific as other serologic tests;therefore the infections should be retested with a newer method.
• B)The Weil-Felix test is not the appropriate test to order;it cannot detect cross-reacting antibodies.
• C)Rickettsial antibodies should be tested using the fluorescent treponemal antibody absorption (FTA-ABS)test,not the Weil-Felix test.
• D)No discrepancy is present.Rickettsial antibodies do not agglutinate with Proteus antigens.

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