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Experimental pelvic inflammatory disease provoked by Chlamydia trachomatis and Mycoplasma hominis in grivet monkeys
Abstract:
Pelvic inflammatory disease was produced by inoculation with Mycoplasma hominis and Chlamydia trachomatis directly into the fallopian tubes of grivet monkeys. The effects of various routes of infection were examined. The method of inoculation with the infecting agent influenced the resulting clinical spectrum. In these monkeys significant changes in humoral antibodies occurred with inflammation caused by both M. hominis and C. trachomatis. Development of cellular antibodies against M. hominis could be demonstrated in all experimentally infected monkeys, whereas no such antibodies could be detected in monkeys with chlamydia salpingitis. M. hominis in female grivet monkeys may spread from the cervix or the uterine cavity, probably via blood vessels and lymphatics, producing parametritis and "exosalpingitis." C. trachomatis may spread from the cervix via the uterine mucosa, producing endosalpingitis with destruction of the epithelium. The infection caused by M. hominis in the genital tract of female grivet monkeys resembles "nongonococcal" salpingitis while C. trachomatis produces infection resembling "gonococcal" salpingitis.
Insights
This study demonstrates how Mycoplasma hominis and Chlamydia trachomatis cause pelvic inflammatory disease in grivet monkeys. Different infection routes lead to varied disease presentations and antibody responses, mimicking human conditions.
Area of Science:
- Reproductive biology
- Microbiology
- Primate models
Background:
- Pelvic inflammatory disease (PID) is a significant reproductive health concern.
- Understanding the pathogenesis of PID caused by specific microorganisms is crucial for effective treatment and prevention.
Purpose of the Study:
- To investigate the induction of pelvic inflammatory disease (PID) in grivet monkeys using Mycoplasma hominis and Chlamydia trachomatis.
- To examine the influence of different inoculation routes on the clinical presentation and immune response to these pathogens.
Main Methods:
- Experimental inoculation of grivet monkeys' fallopian tubes with Mycoplasma hominis and Chlamydia trachomatis.
- Observation of clinical signs and measurement of humoral and cellular antibody responses.
- Analysis of pathogen spread and tissue damage patterns.
Main Results:
- Both Mycoplasma hominis and Chlamydia trachomatis induced significant humoral antibody changes and inflammation.
- Cellular antibodies were detected against Mycoplasma hominis but not Chlamydia trachomatis.
- Mycoplasma hominis spread via lymphatics/blood vessels causing parametritis and exosalpingitis.
- Chlamydia trachomatis spread via uterine mucosa causing endosalpingitis and epithelial destruction.
Conclusions:
- The route of infection significantly impacts the clinical spectrum of PID in grivet monkeys.
- Mycoplasma hominis infection in monkeys resembles human nongonococcal salpingitis.
- Chlamydia trachomatis infection in monkeys resembles human gonococcal salpingitis, highlighting its distinct pathogenic mechanisms.