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Antigenic analysis of avian Chlamydia psittaci using monoclonal antibodies to the major outer membrane protein
A Kikuta1, N Furukawa, T Yoshida
1Department of Veterinary Microbiology, Faculty of Agriculture, Gifu University, Japan.
Abstract:
Monoclonal antibodies to the major outer membrane protein (MOMP) of Chlamydia psittaci derived from a parrot were established for antigenic analysis of avian C. psittaci. With 17 monoclonal antibodies to MOMP, 17 reactivity patterns were identified on 112 strains of C. psittaci, C. pneumoniae and C. trachomatis, which were isolated from birds, mammals and humans in Japan, U.S.A., Canada and Taiwan, from 1938 to 1987. Immunological reactivity of budgerigar-derived strains to the monoclonal antibodies was different from that of pigeon-derived strains. Imported bird-derived strains were distinguishable from domestic bird-derived strains by the reactivity to the monoclonal antibodies. A close relationship between the subtypes and geographic origins was indicated on budgerigar-derived strains. On the contrary, various reactivity patterns were shown in pigeon-derived strains isolated in a narrow area. The monoclonal antibodies established in the present work may be useful probes for ecological study of avian C. psittaci.
Insights
Monoclonal antibodies targeting the major outer membrane protein (MOMP) of Chlamydia psittaci revealed distinct antigenic profiles in avian strains. These antibodies can differentiate between bird species and geographic origins, aiding ecological studies of Chlamydia psittaci.
Area of Science:
- Veterinary Microbiology
- Immunology
- Molecular Biology
Background:
- Avian Chlamydia psittaci poses a significant challenge in poultry and pet bird health.
- Understanding the antigenic diversity of Chlamydia psittaci is crucial for effective disease control and epidemiological studies.
Purpose of the Study:
- To establish monoclonal antibodies against the major outer membrane protein (MOMP) of avian Chlamydia psittaci.
- To analyze the antigenic profiles of various Chlamydia species and strains using these monoclonal antibodies.
- To investigate the potential of these antibodies as tools for the ecological study of avian Chlamydia psittaci.
Main Methods:
- Production of monoclonal antibodies against the major outer membrane protein (MOMP) of Chlamydia psittaci.
- Antigenic analysis of 112 strains of Chlamydia psittaci, C. pneumoniae, and C. trachomatis using 17 distinct monoclonal antibodies.
- Comparison of reactivity patterns across strains isolated from birds, mammals, and humans globally.
Main Results:
- Seventeen distinct reactivity patterns were identified among the tested Chlamydia strains.
- Significant antigenic differences were observed between budgerigar- and pigeon-derived Chlamydia psittaci strains.
- Imported and domestic bird-derived strains showed distinguishable reactivity patterns.
- Budgerigar-derived strains exhibited a correlation between subtypes and geographic origins.
- Pigeon-derived strains from a localized area displayed diverse reactivity patterns.
Conclusions:
- The developed monoclonal antibodies are effective tools for differentiating avian Chlamydia psittaci strains.
- Antigenic analysis using these antibodies can distinguish between strains based on host species and geographic origin.
- These monoclonal antibodies hold promise for advancing the ecological understanding of avian Chlamydia psittaci.