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J Clin Microbiol. Apr 1991; 29(4): 707–711.
PMCID: PMC269857

Serotyping of Chlamydia psittaci isolates using serovar-specific monoclonal antibodies with the microimmunofluorescence test.


A panel of 10 serovar-specific monoclonal antibodies that could distinguish 10 distinct serovars of Chlamydia psittaci was prepared. The panel included one monoclonal antibody to each of the 10 serovars. Monoclonal antibodies were selected for their specificity in the indirect microimmunofluorescence test. Each of the monoclonal antibodies had a titer of 1:1,280 or higher to the homologous strain, with only two showing any cross-reactivity at a dilution of 1:10. Chlamydial antigen derived from organisms growing in tissue culture of one well of a 96-well multiwell dish was usually sufficient for the serotyping of an isolate. Infected yolk sac preparations were also suitable for serotyping. The panel of monoclonal antibodies was used to serotype 55 mammalian and avian strains. All except five of the strains were successfully serotyped; these five strains are presumed to represent at least two additional serovars. The use of a panel of monoclonal antibodies in the indirect microimmunofluorescence test provides a rapid and reliable method for serotyping new isolates. Monoclonal antibodies to new serovars can easily be added to the panel.

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Selected References

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