M. pneumoniae IgM details

This antibody indicates a recent or currently active Mycoplasma pneumoniae infection, the bacterium responsible for 'walking pneumonia,' a typically mild-to-moderate respiratory illness. IgM antibodies rise relatively early in the course of infection, making this test useful for identifying a current or recent case, particularly in someone with a prolonged cough or other respiratory symptoms where this less common cause of pneumonia is being considered.