Infectious Disease Profile

Rapid plasma reagin (RPR)

Optimal Result: 0 - 0.001 Units.

The rapid plasma reagin (RPR) is a test used to screen for syphilis. The RPR test measures IgM and IgG antibodies to lipoidal material released from damaged host cells as well as to lipoprotein-like material, and possibly cardiolipin released from the treponemes. The antilipoidal antibodies are antibodies that are produced not only as a consequence of syphilis and other treponemal diseases, but also in response to nontreponemal diseases of an acute and chronic nature in which tissue damage occurs.

A normal RPR blood sample shows no antibodies to syphilis. However, your doctor cannot completely rule out syphilis if they see no antibodies.

What does it mean if your Rapid plasma reagin (RPR) result is too low?

If your result is negative, your doctor may ask you to wait a few weeks and then return for another test if you are at a higher risk for syphilis. This is because of the RPR test’s potential for a false negative.

What does it mean if your Rapid plasma reagin (RPR) result is too high?

If your result is positive, due to the risk of false-positive results, your doctor will confirm the presence of syphilis with a second test, one that is specific for antibodies against the bacterium that causes syphilis, before starting your treatment. One such test is called the fluorescent treponemal antibody-absorption (FTA-ABS) test.

10 000+ happy clients
100% satisfaction
★ ★ ★ ★ ★ customer support

Understand blood, stool, and urine medical results from all your laboratories.

Get Started With Our Personal Plan

Advanced Plan

  • ✓ Yearly subscription
  • ✓ Five free uploads
  • ✓ Cancel anytime
  • ✓ Instant interpretations
  • ✓ Use the free self-upload form
  • ✓ 3000+ biomarkers explained
  • ✓ Nutrition Recommendations
  • ✓ Dedicated support
  • ✓ Yearly subscription
  • ✓ Five free uploads
  • ✓ Cancel anytime
$79 per year
  • ✓ Instant interpretations
  • ✓ Use the free self-upload form
  • ✓ 3000+ biomarkers explained
  • ✓ Nutrition Recommendations
  • ✓ Dedicated support

Unlimited Plan

  • ✓ No subscription
  • ✓ Ten free uploads
  • ✓ Unlimited access
  • ✓ Instant interpretations
  • ✓ Use the free self-upload form
  • ✓ 3000+ biomarkers explained
  • ✓ Nutrition Recommendations
  • ✓ Dedicated support
  • ✓ No subscription
  • ✓ Ten free uploads
  • ✓ Unlimited access
$250 full version

Are You a Health Professional?

Get started with our professional plan

Welcome to Healthmatters Pro.

Save time on interpreting lab results with the largest database of biomarkers online. In-depth research on any test at your fingertips, all stored and tracked in one place. Learn more

Pro Plan

for health professionals

  • ✓ Track multiple clients results
  • ✓ No setup fees
  • ✓ No hidden costs
  • ✓ Cancel anytime
  • ✓ Instant interpretations
  • ✓ Use the free template forms
  • ✓ 3000+ biomarkers explained
  • ✓ Additional team member $25
  • ✓ Personal training and support

$45 per month

Use promo code to save 10% off any plan.


We implement proven measures to keep your data safe.

At HealthMatters, we're committed to maintaining the security and confidentiality of your personal information. We've put industry-leading security standards in place to help protect against the loss, misuse, or alteration of the information under our control. We use procedural, physical, and electronic security methods designed to prevent unauthorized people from getting access to this information. Our internal code of conduct adds additional privacy protection. All data is backed up multiple times a day and encrypted using SSL certificates. See our Privacy Policy for more details.

×

Understand Your Lab Result Now

  • Instant interpretation
  • 3000+ biomarkers explained
  • Science-based recommendations
  • Online support
  • Secure and private portal

Get 10% off with promocode: