What does it mean that Mycoplasma pneumoniae antibody concentration of 1 in 320 means

A concentration of 1 in 320 antibodies to Mycoplasma pneumoniae may suggest recent or past Mycoplasma pneumoniae infection.

Mycoplasma pneumoniae antibody concentrations are usually measured by serum dilution, and the concentration is expressed as a ratio, such as 1 to 320. This concentration is usually used to determine the status of Mycoplasma pneumoniae infection. For Mycoplasma pneumoniae antibodies, there are mainly immunoglobulin M (MP-IgM) and immunoglobulin G (MP-IgG).

MP-IgM is a response to recent Mycoplasma pneumoniae infection, which begins to rise 1 week after infection, reaches a peak in 4~5 weeks, and lasts for a long time. A positive MP-IgM is indicative of recent Mycoplasma pneumoniae infection. A positive MP-IgG indicates previous infection with Mycoplasma pneumoniae, and a more than 4-fold increase in serum antibody titers in the double dose indicates recent infection.

A concentration of 1 in 320 Mycoplasma pneumoniae antibody may indicate a recent or past Mycoplasma pneumoniae infection. The specific situation needs to be determined by combining the measurement results of MP-IgM and MP-IgG, as well as the patient's clinical symptoms and other examination results. If there are related symptoms, such as fever, headache, fatigue, paroxysmal irritating cough, etc., you should consult a respiratory medicine department and other departments in time.