[Seroprevalence of Mycoplasma pneumoniae in children aged under 12 years].

Introduction: Although Mycoplasma pneumoniae is usually assumed as an infection mainly prevalent in school aged children and adolescents, there is evidence supporting that it may occur at younger ages. This could be related to social conditions, like crowding and day care center/school attendance more frequently and at younger ages than two decades ago. We estimated the prevalence of antibodies anti- Mycoplasma pneumoniae in children aged under 12 years.