Microimmunofluorescence assay (MIFA) has an established position as a standard method in Chlamydia pneumoniae serology. Labsystems Diagnostic's Chlamydia pneumoniae IgG/IgM and IgA MIFA kits include C. pneumoniae antigens and additionally also C. trachomatis and C. psittaci/LPS antigens. No egg yolk control is needed. Group-specific LPS reaction is eliminated from C.pneumoniae and C.trachomatis antigens.