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Cimulative hemagglutination by Mycoplasma pneumoniae and other agglutinins
Abstract:
John, T. Jacob (University of Colorado School of Medicine, Denver), Marlene Stahl, and Vincent A. Fulginiti. Cumulative hemagglutination by Mycoplasma pneumoniae and other agglutinins. J. Bacteriol. 92:1002-1004. 1966.-The phenomenon of cumulative hemagglutination, or hemagglutination by two agglutinins, each in subagglutinating concentration, was demonstrated by use of four different systems, namely, horse serum and Mycoplasma pneumoniae, horse serum and measles antigen, M. pneumoniae and measles antigen, and parainfluenza 2 virus and M. pneumoniae. Cumulative hemagglutination appears to be the mechanism by which a horse-serum diluent causes high hemagglutination titers of M. pneumoniae, since both contain hemagglutinins against vervet erythrocytes. It was also shown that antibodies against either one of the two antigens may cause inhibition of such hemagglutination.
Insights
Cumulative hemagglutination, where two agents together cause red blood cell clumping, was demonstrated using Mycoplasma pneumoniae and other agents. This phenomenon explains high Mycoplasma pneumoniae titers in horse serum diluents.
Area of Science:
- Microbiology
- Immunology
Background:
- Hemagglutination is a key serological technique.
- Mycoplasma pneumoniae is a significant respiratory pathogen.
Purpose of the Study:
- To demonstrate and investigate the phenomenon of cumulative hemagglutination.
- To elucidate the mechanism behind high hemagglutination titers observed with Mycoplasma pneumoniae in horse serum.
Main Methods:
- Utilized four distinct hemagglutination systems involving Mycoplasma pneumoniae, horse serum, measles antigen, and parainfluenza 2 virus.
- Assessed the effect of subagglutinating concentrations of two different agglutinins acting together.
- Investigated antibody-mediated inhibition of cumulative hemagglutination.
Main Results:
- Demonstrated cumulative hemagglutination in all four tested systems.
- Identified cumulative hemagglutination as the mechanism for elevated Mycoplasma pneumoniae titers in horse serum diluents, due to shared hemagglutinins for vervet erythrocytes.
- Showed that antibodies against individual antigens can inhibit the cumulative hemagglutination process.
Conclusions:
- Cumulative hemagglutination is a significant factor in Mycoplasma pneumoniae serology.
- Understanding this phenomenon is crucial for accurate interpretation of hemagglutination assays.
- The interaction of multiple agglutinins can enhance or inhibit hemagglutination titers.