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Leishmaniasis in Sudan. Cutaneous leishmaniasis
1Department of Immunology and Clinical Pathology, Institute of Endemic Diseases, University of Khartoum, Khartoum, Sudan. elhassan_85@hotmail.com
Summary
Cutaneous leishmaniasis in Sudan, caused by Leishmania major, presents with skin lesions. Diagnosis involves parasite detection, and treatment is reserved for severe cases.
Area of Science:
- Medical Parasitology
- Immunology
- Dermatology
Background:
- Cutaneous leishmaniasis (CL) is endemic in Sudan, caused by Leishmania major (zymodeme LON-1).
- The disease is transmitted by Phlebotomus papatasi, with Arvicanthis niloticus as a probable reservoir.
- Clinical manifestations include papules, nodules, and nodulo-ulcerative lesions, with lymphatic dissemination in 20% of cases.
Purpose of the Study:
- To describe the clinical and pathological features of cutaneous leishmaniasis in Sudan.
- To outline diagnostic methods and treatment criteria for CL in the region.
- To investigate the immunological response in CL patients.
Main Methods:
- Clinical observation and description of lesion pathology.
- Microscopic identification of Leishmania parasites in slit smears and histological sections.
- Polymerase chain reaction (PCR) for Leishmania major detection.
- In vitro proliferation assays and cytokine profiling of peripheral blood mononuclear cells (PBMC).
Main Results:
- Langerhans cells are key antigen-presenting cells, migrating to lymph nodes to activate T cells.
- PBMC proliferation and cytokine production (Th1/Th2 patterns) correlate with disease severity.
- Parasites detected in 50-70% of slit smears and 70% of histological sections.
- PCR achieved 86% positivity for Leishmania major detection.
Conclusions:
- CL in Sudan presents characteristic clinical and pathological features.
- Diagnostic accuracy is enhanced by combining smear, histology, and PCR.
- Treatment is indicated only for severe CL cases due to its self-limiting nature.