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Cutaneous Leishmaniasis in the Dorsal Skin of Hamsters: a Useful Model for the Screening of Antileishmanial Drugs
Published on: April 21, 2012
Rhesus monkey model for Leishmania major transmitted by Phlebotomus papatasi sandfly bites
R J Probst1, B T Wellde, P G Lawyer
1Division of Veterinary Medicine, Walter Reed Army Institute of Research, Silver Spring, Maryland 20910-7500, USA.
Medical and Veterinary Entomology
|April 12, 2001
Summary
Researchers developed a Leishmania major infection model in rhesus monkeys using sandfly bites. This near-human model shows disease progression and immune responses, aiding leishmaniasis treatment research.
Area of Science:
- Veterinary Medicine
- Infectious Diseases
- Parasitology
Background:
- Leishmaniasis research requires a near-human model to study infection, immune responses, and treatments.
- Current models often do not fully replicate natural infection processes.
Purpose of the Study:
- To develop a reproducible model of Leishmania major infection in rhesus monkeys via sandfly bites.
- To investigate the natural infection, immunological responses, and lesion development in this primate model.
Main Methods:
- Rhesus monkeys were exposed to bites from Phlebotomus papatasi sandflies experimentally infected with Leishmania major.
- Infection and lesion development were monitored, along with immunological responses including delayed type hypersensitivity (DTH) and antibody titers (ELISA, IFA).
Main Results:
- 7 out of 8 Indian-origin rhesus monkeys developed dermal lesions consistent with cutaneous leishmaniasis, persisting for 3-7 months.
- Monkeys showed significant DTH responses and developed antibody titers post-infection, with faster healing upon re-challenge.
- Chinese-origin macaques showed subclinical infections with antibody and DTH responses but no visible lesions.
Conclusions:
- The sandfly transmission model in rhesus monkeys provides a valuable near-human system for studying zoonotic cutaneous leishmaniasis (ZCL).
- This model allows for detailed investigation of disease pathogenesis and evaluation of potential therapeutic interventions for leishmaniasis.
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