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Post-kala-azar dermal leishmaniasis: a global overview.

Chaitali Ghosh1, Chaitali Karmakar1, Deblina Sarkar1

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Summary
This summary is machine-generated.

Post-kala-azar dermal leishmaniasis (PKDL) is a persistent skin complication after visceral leishmaniasis (VL) treatment. Addressing PKDL requires integrated diagnostics, immunology, and community strategies for kala-azar elimination.

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Area of Science:

  • Dermatology
  • Infectious Diseases
  • Immunology

Background:

  • Post-kala-azar dermal leishmaniasis (PKDL) is a chronic skin sequela in patients treated for visceral leishmaniasis (VL).
  • PKDL poses a significant epidemiological challenge in South Asia, acting as a reservoir for Leishmania donovani and sustaining VL transmission.
  • Risk factors include prior VL, immunosuppression, host genetics, malnutrition, and delayed diagnosis due to stigma and poor health-seeking behavior.

Purpose of the Study:

  • To review the epidemiological challenges, diagnostic difficulties, and therapeutic hurdles of PKDL.
  • To highlight the immunological aspects and the role of molecular tools in PKDL diagnosis.
  • To emphasize the need for integrated strategies for PKDL elimination and sustained VL control.

Main Methods:

  • Literature review and synthesis of current knowledge on PKDL.
  • Analysis of diagnostic challenges, including molecular tools.
  • Evaluation of therapeutic management and its limitations.

Main Results:

  • PKDL presents as macular or polymorphic forms, with diagnostic challenges in early or macular stages due to low parasite burden.
  • The disease involves a mixed Th1/Th2 immune response with significant cellular infiltration.
  • Current treatments are hampered by prolonged duration, relapse risk, drug resistance, and poor compliance.

Conclusions:

  • Molecular diagnostics offer improved sensitivity and field applicability for PKDL detection.
  • Understanding the immunological profile is crucial for managing PKDL.
  • Integrated strategies combining molecular diagnostics, immunological insights, and community-based treatment are essential for PKDL elimination and overall kala-azar control efforts.