Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Assessing Entomological and Epidemiological Efficacy of Pyriproxyfen-treated Ovitraps Using Saliva Samples

Version 1 : Received: 3 December 2021 / Approved: 6 December 2021 / Online: 6 December 2021 (15:25:50 CET)

How to cite: Ligsay, A.D.; Tambio, K.J.M.; Aytona, M.J.M.; Alejandro, G.J.D.; Regencia, Z.J.G.; Baja, E.S.; Paul, R.E.L. Assessing Entomological and Epidemiological Efficacy of Pyriproxyfen-treated Ovitraps Using Saliva Samples. Preprints 2021, 2021120084 (doi: 10.20944/preprints202112.0084.v1). Ligsay, A.D.; Tambio, K.J.M.; Aytona, M.J.M.; Alejandro, G.J.D.; Regencia, Z.J.G.; Baja, E.S.; Paul, R.E.L. Assessing Entomological and Epidemiological Efficacy of Pyriproxyfen-treated Ovitraps Using Saliva Samples. Preprints 2021, 2021120084 (doi: 10.20944/preprints202112.0084.v1).

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 four 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 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 months two, three, and four post-interventions but not earlier. Dengue seroconversions rates did decrease in the treated population but not significantly so. In conclusion, the use of PPF-treated ovitraps impacted the mosquito population but not the seroconversion rates. Compliance to provide saliva samples and the ability to detect IgG antibodies within these samples were encouraging and suggested that further studies on a larger population and longer duration are warranted.

Keywords

Mosquito control; Dengue; Mosquito density; Pyriproxyfen; Philippines

Subject

MEDICINE & PHARMACOLOGY, Other

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