View source for Rapid plasma reagin

== Background ==
*Non-treponemal diagnostic test for [[syphilis]]
*Used to trend titres in response to treatment

==Interpretation==

*Reported as the greatest dilution that is still positive

===False positive===

*Infectious
**Bacterial [[endocarditis]], including [[rheumatic heart disease]]
**[[Chancroid]]
**[[Varicella-zoster virus]]
**[[Epstein-Barr virus]]
**[[Leprosy]]
**[[Lymphogranuloma venereum]]
**[[Malaria]]
**[[Mumps]]
**[[Mycoplasma pneumoniae]]
**[[Streptococcus pneumoniae]]
**[[Rickettsioses]]
**[[Tuberculosis]]
**[[Viral hepatitis]]
**[[Viral pneumonia]]
**Other treponemal infections such as [[yaws]], [[pinta]], or [[bejel]]
*Non-infectious
**Older age
**[[Chronic liver disease]]
**Connective tissue diseases such as [[rheumatoid arthritis]]
**Injection drug use
**Malignancy
**[[Multiple myeloma]]
**[[Pregnancy]]
**[[Ulcerative colitis]]

[[Category:Infectious diseases]]
[[Category:Diagnostics]]