Chlamydophila pneumoniae Antibody (IgA) details

Chlamydophila pneumoniae (also called Chlamydia pneumoniae) is a bacterium spread through respiratory droplets that causes infections such as bronchitis, sinusitis and pneumonia, often mild. This blood test measures IgA antibodies against it, part of a panel that may also measure other antibody types. IgA antibodies tend to fall after an infection clears, so a raised result can suggest a recent or ongoing infection. Many adults have been exposed to this bacterium in the past, and antibody levels vary between people, so the result is interpreted together with IgG and IgM results, changes between samples taken a few weeks apart, and your symptoms.