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Post-kala-azar dermal leishmaniasis in the Indian subcontinent: A threat to the South-East Asia Region Kala-azar Elimination Programme
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Post-kala-azar dermal leishmaniasis in the Indian subcontinent: A threat to the South-East Asia Region Kala-azar Elimination Programme
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Journal Article
Post-kala-azar dermal leishmaniasis in the Indian subcontinent: A threat to the South-East Asia Region Kala-azar Elimination Programme
2017
Overview
The South-East Asia Region Kala-azar Elimination Programme (KAEP) is expected to enter the consolidation phase in 2017, which focuses on case detection, vector control, and identifying potential sources of infection. Post-kala-azar dermal leishmaniasis (PKDL) is thought to play a role in the recurrence of visceral leishmaniasis (VL)/kala-azar outbreaks, and control of PKDL is among the priorities of the KAEP.
We reviewed the literature with regard to PKDL in Asia and interpreted the findings in relation to current intervention methods in the KAEP in order to make recommendations. There is a considerable knowledge gap regarding the pathophysiology of VL and PKDL, especially the underlying immune responses. Risk factors (of which previous VL treatments may be most important) are poorly understood and need to be better defined. The role of PKDL patients in transmission is largely unknown, and there is insufficient information about the importance of duration, distribution and severity of the rash, time of onset, and self-healing. Current intervention methods focus on active case detection and treatment of all PKDL cases with miltefosine while there is increasing drug resistance. The prevention of PKDL by improved VL treatment currently receives insufficient attention.
PKDL is a heterogeneous and dynamic condition, and patients differ with regard to time of onset after VL, chronicity, and distribution and appearance of the rash, as well as immune responses (including tendency to self-heal), all of which may vary over time. It is essential to fully describe the pathophysiology in order to make informed decisions on the most cost-effective approach. Emphasis should be on early detection of those who contribute to transmission and those who are in need of treatment, for whom short-course, effective, and safe drug regimens should be available. The prevention of PKDL should be emphasised by innovative and improved treatment for VL, which may include immunomodulation.
Publisher
Public Library of Science,Public Library of Science (PLoS)
Subject
/ Asia, Southeastern - epidemiology
/ Complications and side effects
/ Control
/ Disease Eradication - organization & administration
/ Disease Outbreaks - prevention & control
/ Drugs
/ Duration
/ Female
/ Humans
/ Leishmania donovani - isolation & purification
/ Leishmaniasis, Cutaneous - epidemiology
/ Leishmaniasis, Cutaneous - parasitology
/ Leishmaniasis, Visceral - drug therapy
/ Leishmaniasis, Visceral - epidemiology
/ Leishmaniasis, Visceral - parasitology
/ Leishmaniasis, Visceral - prevention & control
/ Male
/ Medicine and Health Sciences
/ Methods
/ Patients
/ Review
/ Skin
