Chronic Lyme arthritis: A mystery solved?

In 1975, researchers from Yale investigated an epidemic of 51 patients with arthritis who lived near the woodsy town of Lyme, Connecticut. The most common symptom was recurrent attacks of knee swelling. A few had pain in other joints, such as the wrist or ankle. Many had fever, fatigue, and headache. Some remembered a round skin rash before the onset of knee swelling. We now know that Lyme disease is an infection acquired from tick bites, caused by a spiral bacterium named Borrelia burgdorferi. After a tick bite, Borrelia bacteria wriggle through the skin away from the bite site. This leads to a circular red rash, known as erythema migrans. In its more advanced stages, erythema migrans may take on a bullseye appearance. Many people are unaware of the rash, as it is usually painless, and ticks may bite in less visible locations, such as a buttock or shoulder blade. Lyme disease is diagnosed with blood tests that detect antibodies to B. burgdorferi. Two-step testing is traditionally performed. A rapid enzyme immunoassay is performed first. If this is positive, a more time-consuming Western blot test is sent for confirmation. The FDA recently approved two rapid tests for Lyme disease that are performed simultaneously, reducing the turnaround time. Lyme disease often leads to Lyme arthritis Although Lyme disease may affect many organs, such as the heart and nervous system, joint involvement tends to be the most common and persistent manifestation, resulting in joint swelling and ...
Source: Harvard Health Blog - Category: Consumer Health News Authors: Tags: Arthritis Bones and joints Infectious diseases Source Type: blogs