Ramesh, Anita, Oliveira, Paula, Cameron, Mary, Castanha, Priscila M. S., Walker, Thomas, Lenhart, Audrey, Impoinvil, Lucy, Alexander, Neal, Medeiros, Zulma, Sá, André, Rocha, Abraham, Souza, Wayner V., Maciel, Amélia and Braga, Cynthia (2024) Postintervention immunological and entomological survey of lymphatic filariasis in the City of Olinda, Brazil, 2015–2016. The American Journal of Tropical Medicine and Hygiene, 110 (3). pp. 470-482. doi:10.4269/ajtmh.23-0174 ISSN 0002-9637.
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Abstract
Lymphatic filariasis (LF) is a leading cause of disability due to infectious disease worldwide. The Recife Metropolitan Region (RMR) is the only remaining focus of LF in Brazil, where the parasite Wuchereria bancrofti is transmitted solely by the mosquito Culex quinquefasciatus. This study reports the results of transmission assessment surveys and molecular xenomonitoring in the city of Olinda, RMR, after nearly 15 years (2015–2016) of interventions for LF elimination. Participants were screened for W. bancrofti antigen via immunochromatographic card tests (ICT) in: 1) door-to-door surveys conducted for all children aged 5–7 years from 4 out of 17 intervention areas treated with at least five annual doses of mass drug administration (MDA), and 2) a two-stage cluster sampling survey of residents aged 5 years and older in non-MDA areas. Mosquitoes were collected via handheld aspirators in four MDA areas, differentiated by species, sex, and physiological status, pooled into groups of up to 10 blood-fed, semigravid, and gravid mosquitoes, and screened for W. bancrofti infection by real-time quantitative polymerase chain reaction (RT-qPCR). All 1,170 children from MDA areas and the entire population sample of 990 residents in non-MDA areas were ICT negative. In MDA areas, a total of 3,152 female Cx. quinquefasciatus mosquitoes in 277 households (range, 0–296 mosquitoes per house) were collected via aspiration. RT-qPCR of 233 pools of mosquitos were negative for W. bancrofti RNA; an independent reference laboratory confirmed these results. These results provide evidence that LF transmission has been halted in this setting.
| Item Type: | Journal Article |
|---|---|
| Subjects: | Q Science > QR Microbiology > QR355 Virology R Medicine > RC Internal medicine |
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) |
| SWORD Depositor: | Library Publications Router |
| Library of Congress Subject Headings (LCSH): | Elephantiasis -- Brazil -- Olinda, Elephantiasis -- Prevention, Elephantiasis -- Transmission -- Brazil -- Olinda |
| Journal or Publication Title: | The American Journal of Tropical Medicine and Hygiene |
| Publisher: | American Society of Tropical Medicine and Hygiene |
| ISSN: | 0002-9637 |
| Official Date: | March 2024 |
| Dates: | Date Event March 2024 Published 13 February 2024 Available 5 November 2023 Accepted |
| Volume: | 110 |
| Number: | 3 |
| Page Range: | pp. 470-482 |
| DOI: | 10.4269/ajtmh.23-0174 |
| Status: | Peer Reviewed |
| Publication Status: | Published |
| Access rights to Published version: | Restricted or Subscription Access |
| Date of first compliant deposit: | 28 March 2024 |
| RIOXX Funder/Project Grant: | Project/Grant ID RIOXX Funder Name Funder ID 401575/2014-4 Conselho Nacional de Desenvolvimento Científico e Tecnológico UNSPECIFIED Coordenação de Aperfeiçoamento de Pessoal de Nível Superior APQ-0680-4.06/15 Fundação de Amparo à Ciência e Tecnologia do Estado de Pernambuco VPPLR-002-FIO-15/Goal 2 Centro de Pesquisas Aggeu Magalhães, Fundação Oswaldo Cruz 304174/2014-9 Centro de Pesquisas Aggeu Magalhães, Fundação Oswaldo Cruz 304174/2014-9 Conselho Nacional de Desenvolvimento Científico e Tecnológico |
| URI: | https://wrap.warwick.ac.uk/183577/ |
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