IgM antibodies are the first type of antibodies produced by the immune system in response to an acute infection. When IgM against Mycoplasma pneumoniae is present, it typically indicates a recent or ongoing infection. These antibodies appear within 1–2 weeks of exposure and usually decline after a few months. Testing for IgM is useful in identifying the early phase of a Mycoplasma pneumoniae infection, especially in symptomatic individuals.
It suggests a recent or ongoing infection with Mycoplasma pneumoniae.
Yes, especially in early infection stages or if symptoms are mild or atypical.
Typically within 1 to 2 weeks after exposure.
It may persist for weeks or a few months even after symptoms have improved.