Syphilis Testing
This is the screening test for syphilis.
What is RPR or VDRL?
This rash can allow diagnosis without serologic testing.
What is erythema migrans?
This is the screening test for HIV.
What is ELISA?
These antibodies appear first.
What is IgM?
This virus causes mono.
What is Epstein-Barr virus?
This test confirms a positive screening result.
What is FTA-ABS or TP-PA?
This test is used first when serology is needed.
What is ELISA?
This test confirms HIV infection.
What is Western blot?
These antibodies indicate past exposure.
What is IgG?
This is the first test ordered.
What is heterophile antibody test?
These tests can be trended to monitor treatment response.
What are nontreponemal tests?
This test confirms Lyme disease after ELISA.
What is Western blot?
This test measures viral load.
What is PCR?
A titer of 1:20 is considered this compared to 1:5.
What is greater?
These lymphocytes are seen on CBC.
What are atypical lymphocytes?
This condition can cause false positives on VDRL.
What is leprosy?
IgM antibodies appear approximately this long after onset.
What is 2–4 weeks?
This period occurs before antibodies are detectable.
What is the window period?
This method detects immune response, not pathogen.
What is serology?
This occurs if Monospot is negative but suspicion remains.
What is EBV antibody testing?
Direct diagnostic methods include this microscopic technique.
What is dark field microscopy?
This must be present to avoid unnecessary testing.
What is exposure in an endemic area?
This antigen appears early in infection.
What is p24 antigen?
This test can be used to follow infection progression.
What is antibody titer?
These organs may enlarge in mono.
What are the spleen and liver?