Which of the following could cause a false positive RPR?

Which hepatitis antibody confers immunity against reinfection with hepatitis B virus?

An RPR card test performed on a spinal fluid sample was nonreactive.  The physician was skeptical and asked for a repeat test on the spinal fluid.  The RPR was reactive 1:1 dilution.  The result:

Long term or sequelae complications of S. pyogenes infection can include:

What type of antigen is used in the RPR card test?

The substance produced by group A strep that is responsible for causing the red rash seen in scarlet fever is:

The VDRL and RPR tests are

Which of the following is a confirmatory test when the RPR is positive?

M pneumoniae infections are associated with the production of which antibodies?

In the various stages of disease, what term is described as the time when most severe signs and symptoms occur?