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Assessing Entomological and Epidemiological Efficacy of Pyriproxyfen-Treated Ovitraps in the Reduction of Aedes Species: A Quasi-Experiment on Dengue Infection Using Saliva Samples

Author

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  • Antonio D. Ligsay

    (The Graduate School & College of Science, University of Santo Tomas España Boulevard, Manila 1008, Philippines
    Clinical Research Section, St. Luke’s College of Medicine—William H. Quasha Memorial, 279 E. Rodriguez Sr. Ave, Quezon City 1112, Philippines)

  • Kristan Jela M. Tambio

    (Clinical Research Section, St. Luke’s College of Medicine—William H. Quasha Memorial, 279 E. Rodriguez Sr. Ave, Quezon City 1112, Philippines)

  • Michelle Joyce M. Aytona

    (Clinical Research Section, St. Luke’s College of Medicine—William H. Quasha Memorial, 279 E. Rodriguez Sr. Ave, Quezon City 1112, Philippines)

  • Grecebio Jonathan D. Alejandro

    (The Graduate School & College of Science, University of Santo Tomas España Boulevard, Manila 1008, Philippines)

  • Zypher Jude G. Regencia

    (Department of Clinical Epidemiology, College of Medicine, University of the Philippines Manila, Pedro Gil Street, Ermita, Manila 1000, Philippines
    Institute of Clinical Epidemiology, National Institutes of Health, University of the Philippines Manila, 623 Pedro Gil Street, Ermita, Manila 1000, Philippines)

  • Emmanuel S. Baja

    (Department of Clinical Epidemiology, College of Medicine, University of the Philippines Manila, Pedro Gil Street, Ermita, Manila 1000, Philippines
    Institute of Clinical Epidemiology, National Institutes of Health, University of the Philippines Manila, 623 Pedro Gil Street, Ermita, Manila 1000, Philippines)

  • Richard Edward L. Paul

    (Institut Pasteur, Functional Genetics of Infectious Diseases Unit, UMR 2000 (CNRS), 75015 Paris, France)

Abstract

Our study assessed the impact of using ovitraps with pyriproxyfen on mosquito populations and the feasibility of using human saliva samples to test for seroconversion to dengue virus (DENV). We used a quasi-experimental research design by forming the intervention ( n = 220) and the control ( n = 223) groups in neighboring Taguig City, Philippines, over 4 months. Socio-demographic data, entomological indices, and IgG antibodies against DENV were measured. Associations between the implementation of ovitraps dosed with pyriproxyfen and mosquito densities (percentage positive ovitraps and container indices) and DENV seroconversion were calculated post-intervention in Months 2, 3, and 4. Among the participants recruited at baseline, 17 and 13 were seropositive for dengue (DENV) in the intervention and control groups, respectively. Both entomological indices were lower in the treated area than the control site at post-intervention Months 2, 3, and 4, but not earlier. Dengue seroconversions rates decreased in the treated population, but not significantly so. In conclusion, the use of PPF-treated ovitraps may have impacted the mosquito population, but not seroconversion rates. Compliance in providing saliva samples and the ability to detect IgG antibodies within these samples was encouraging and suggests that further studies on larger populations for longer durations are warranted.

Suggested Citation

  • Antonio D. Ligsay & Kristan Jela M. Tambio & Michelle Joyce M. Aytona & Grecebio Jonathan D. Alejandro & Zypher Jude G. Regencia & Emmanuel S. Baja & Richard Edward L. Paul, 2022. "Assessing Entomological and Epidemiological Efficacy of Pyriproxyfen-Treated Ovitraps in the Reduction of Aedes Species: A Quasi-Experiment on Dengue Infection Using Saliva Samples," IJERPH, MDPI, vol. 19(5), pages 1-13, March.
    • Handle: RePEc:gam:jijerp:v:19:y:2022:i:5:p:3026-:d:764377
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    References listed on IDEAS

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    1. Kristen Bartlett-Healy & George Hamilton & Sean Healy & Taryn Crepeau & Isik Unlu & Ary Farajollahi & Dina Fonseca & Randy Gaugler & Gary G. Clark & Daniel Strickman, 2011. "Source Reduction Behavior as an Independent Measurement of the Impact of a Public Health Education Campaign in an Integrated Vector Management Program for the Asian Tiger Mosquito," IJERPH, MDPI, vol. 8(5), pages 1-10, May.
    2. Leigh R Bowman & Sarah Donegan & Philip J McCall, 2016. "Is Dengue Vector Control Deficient in Effectiveness or Evidence?: Systematic Review and Meta-analysis," PLOS Neglected Tropical Diseases, Public Library of Science, vol. 10(3), pages 1-24, March.
    3. Antonio Ligsay & Olivier Telle & Richard Paul, 2021. "Challenges to Mitigating the Urban Health Burden of Mosquito-Borne Diseases in the Face of Climate Change," IJERPH, MDPI, vol. 18(9), pages 1-12, May.
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