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[Epidemiology and pathogenesis of donovanosis]
Abstract:
Thirty three cases of donovanosis have been observed at the Dermatology Department of Cayenne's Hospital between 1970 and 1982, only in black people. The high frequency of rectal lesions of passive homosexual patients and the vagina contamination in women without sexual intercourse postulate for the intestinal reservoir of the bacteria, and the possibility of auto-inoculation. There is probably a cellular immune deficit. Donovanosis is often associated with other diseases, and in our practice in French Guyana, with leprosy. The skin of the genitalia is the most frequently infected, the mucosa generally resistant. The intracellular life of the "Donovan bodies" "Calymmatobacterium granulomatosis"--in the cytoplasm of large mononuclear cells seems an argument for an anergic disease.
Insights
Donovanosis, a bacterial infection, may originate from an intestinal reservoir, potentially leading to auto-inoculation. This study observed cases in French Guyana, noting associations with immune deficits and other diseases like leprosy.
Area of Science:
- Dermatology
- Infectious Diseases
- Microbiology
Context:
- Donovanosis (granuloma inguinale) is a chronic bacterial infection.
- Observed 33 cases at Cayenne's Hospital (1970-1982), exclusively in Black individuals.
- French Guyana presents a unique epidemiological context for this disease.
Purpose:
- To investigate the clinical presentation and potential transmission routes of donovanosis.
- To explore the association between donovanosis, immune status, and co-infections.
- To understand the pathogenesis of donovanosis, including bacterial reservoirs and host immune response.
Summary:
- Calymmatobacterium granulomatis causes donovanosis, primarily affecting genitalia skin.
- High frequency of rectal lesions in homosexual patients and vaginal contamination in women suggest an intestinal reservoir and auto-inoculation.
- Associated with cellular immune deficits and co-infections, notably leprosy.
Impact:
- Suggests a potential intestinal reservoir and auto-inoculation as transmission routes for donovanosis.
- Highlights the association with cellular immune deficits, indicating an anergic disease state.
- Underscores the importance of considering co-infections, such as leprosy, in donovanosis management.