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Forest-Going as a Risk Factor for Confirmed Malaria in Champasak Province, Lao PDR: A Case-Control Study

Author

Listed:
  • Sarah Gallalee

    (Malaria Elimination Initiative, Institute for Global Health Sciences, University of California San Francisco, San Francisco, CA 94158, USA)

  • Emily Dantzer

    (Malaria Elimination Initiative, Institute for Global Health Sciences, University of California San Francisco, San Francisco, CA 94158, USA)

  • Francois Rerolle

    (Malaria Elimination Initiative, Institute for Global Health Sciences, University of California San Francisco, San Francisco, CA 94158, USA
    Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, CA 94158, USA)

  • Keobouphaphone Chindavongsa

    (Center for Malariology, Parasitology and Entomology, Ministry of Health, Vientiane 01000, Laos)

  • Khampheng Phongluxa

    (Lao Tropical and Public Health Institute, Ministry of Health, Vientiane 01000, Laos)

  • Wattana Lasichanh

    (Center for Malariology, Parasitology and Entomology, Ministry of Health, Vientiane 01000, Laos)

  • Jennifer L. Smith

    (Malaria Elimination Initiative, Institute for Global Health Sciences, University of California San Francisco, San Francisco, CA 94158, USA
    Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, CA 94158, USA)

  • Roly Gosling

    (Malaria Elimination Initiative, Institute for Global Health Sciences, University of California San Francisco, San Francisco, CA 94158, USA
    Department of Disease Control, London School of Hygiene and Tropical Medicine, London WC1E 7HT, UK)

  • Andrew Lover

    (Department of Biostatistics and Epidemiology, School of Public Health and Health Sciences, University of Massachusetts-Amherst, Amherst, MA01003, USA)

  • Bouasy Hongvanthong

    (Center for Malariology, Parasitology and Entomology, Ministry of Health, Vientiane 01000, Laos)

  • Adam Bennett

    (Malaria Elimination Initiative, Institute for Global Health Sciences, University of California San Francisco, San Francisco, CA 94158, USA
    Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, CA 94158, USA)

Abstract

Lao People’s Democratic Republic (Lao PDR) has made significant progress in reducing malaria in recent years. In the Greater Mekong Subregion, forest-going is often a risk factor contributing to continuing malaria transmission. This study assessed forest-going and other potential risk factors for malaria cases in Champasak Province, Lao PDR. Routine passive surveillance data from August 2017 to December 2018 were extracted from health facilities in three districts for a case-control study; at the time of presentation, all fever cases were asked to report any recent forest travel. Multivariable logistic regression was used to assess the relationship between forest-going and malaria infection while controlling for other covariates. Of 2933 fever cases with data available on forest-sleeping and malaria diagnosis from 25 health facilities, 244 (8%) tested positive (cases), and 2689 (92%) tested negative (controls). Compared with spending 0–2 nights in the forest, spending 3–7 nights in the forest was associated with 9.7 times the odds of having a malaria infection (95% CI: 4.67–20.31, p < 0.001) when adjusting for gender, occupation, and season. Forest-going, especially longer trips, is associated with increased risk for confirmed symptomatic malaria in southern Lao PDR, and appropriate and targeted intervention efforts are needed to protect this high-risk population.

Suggested Citation

  • Sarah Gallalee & Emily Dantzer & Francois Rerolle & Keobouphaphone Chindavongsa & Khampheng Phongluxa & Wattana Lasichanh & Jennifer L. Smith & Roly Gosling & Andrew Lover & Bouasy Hongvanthong & Adam, 2024. "Forest-Going as a Risk Factor for Confirmed Malaria in Champasak Province, Lao PDR: A Case-Control Study," IJERPH, MDPI, vol. 21(12), pages 1-12, December.
    • Handle: RePEc:gam:jijerp:v:21:y:2024:i:12:p:1624-:d:1536827
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    References listed on IDEAS

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    1. Kinley Wangdi & Ayodhia Pitaloka Pasaribu & Archie C.A. Clements, 2021. "Addressing hard‐to‐reach populations for achieving malaria elimination in the Asia Pacific Malaria Elimination Network countries," Asia and the Pacific Policy Studies, Wiley Blackwell, vol. 8(2), pages 176-188, May.
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