Antibodies in the sera of Mycoplasma pneumoniae-infected patients against proteins of Mycoplasma genitalium and other mycoplasmas of man.
Frequency and pattern of anti-Mycoplasma genitalium antibodies in sera of 50 patients with Mycoplasma pneumoniae-infection were examined by the Western immunoblot method. The sera reacted with several proteins of M. genitalium. However, during the course of infection there was only a moderate increase of antibodies mainly against the bands of 135 and 105 kd in contrast to the more intense increase of numerous bands of M. pneumoniae. If antibodies against the 168 kd-adhesin of M. pneumoniae were isolated by affinity chromatography, only the IgG-, but not the IgM-fraction reacted with the 135 kd protein of M. genitalium. Results with rabbit antisera supported these findings, additionally indicating a lack of substantial cross reactions between M. pneumoniae and other species except M. genitalium. The development of anti M. genitalium antibodies at early age and their relatively constant pattern suggest an early immunization by so far unknown cross reacting microbial antigens. Antigenic cross reactions between proteins of M. pneumoniae and M. genitalium apparently do not play a substantial role in the diagnostic serology of M. pneumoniae disease.
Abteilung Mikrobiologie und Hygiene, Universität Freiburg.
W
W
Bredt
B
B
Kleinmann
E
E
Jacobs
D000328:Adult; D000818:Animals; D000907:Antibodies, Bacterial / Q000032:analysis / Q000096:biosynthesis* / Q000302:isolation & purification; D000942:Antigens, Bacterial / Q000276:immunology*; D001426:Bacterial Proteins / Q000276:immunology*; D002846:Chromatography, Affinity; D003168:Complement Fixation Tests; D003429:Cross Reactions; D006801:Humans; D007118:Immunoassay; D007074:Immunoglobulin G / Q000096:biosynthesis; D007075:Immunoglobulin M / Q000096:biosynthesis; D008297:Male; D009174:Mycoplasma / Q000276:immunology*; D011019:Pneumonia, Mycoplasma / Q000276:immunology*; D011817:Rabbits
D000907:Antibodies, Bacterial; D000942:Antigens, Bacterial; D001426:Bacterial Proteins; D007074:Immunoglobulin G; D007075:Immunoglobulin M