Evaluation of rodent control to fight Lassa fever based on field data and mathematical modelling
| Autor: | Herwig Leirs, Fodé Kourouma, Benny Borremans, N’Faly Magassouba, Elisabeth Fichet-Calvet, Joachim Mariën, Stephan Günther, Toni Rieger, Jatta Baforday |
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| Rok vydání: | 2019 |
| Předmět: |
0301 basic medicine
Rodent Epidemiology viruses Field data Antibodies Viral medicine.disease_cause West africa rodent-borne virus Seroepidemiologic Studies Drug Discovery arenavirus Lassa fever 2. Zero hunger biology virus diseases General Medicine 3. Good health Infectious Diseases rodent control Health Services Research 030106 microbiology Immunology rodent vaccination Microbiology Natal multimammate mouse 03 medical and health sciences Lassa Fever Mastomys natalensis Virology biology.animal Disease Transmission Infectious medicine Animals Lassa virus Biology Disease Reservoirs Arenavirus Original Articles Models Theoretical biology.organism_classification medicine.disease 030104 developmental biology Mastomys Guinea Parasitology Murinae Human medicine |
| Zdroj: | Emerging microbes & infections Emerging Microbes & Infections |
| ISSN: | 2222-1751 |
| DOI: | 10.1080/22221751.2019.1605846 |
| Popis: | The Natal multimammate mouse (Mastomys natalensis) is the reservoir host of Lassa virus, an arenavirus that causes Lassa haemorrhagic fever in humans in West Africa. Because no vaccine exists and therapeutic options are limited, preventing infection through rodent control and human behavioural measures is currently considered to be the only option. In order to assess the efficacy of rodent control, we performed a 4-year field experiment in rural Upper Guinea and developed a mathematical model to simulate different control strategies (annual density control, continuous density control, and rodent vaccination). For the field study, rodenticide baits were placed each year in three rural villages, while three other villages were used as controls. Rodents were trapped before and after every treatment and their antibody status and age were determined. Data from the field study were used to parameterize the mathematical model. In the field study, we found a significant negative effect of rodent control on seroprevalence, but this effect was small especially given the effort. Furthermore, the rodent populations recovered rapidly after rodenticide application, leading us to conclude that an annual control strategy is unlikely to significantly reduce Lassa virus spillover to humans. In agreement with this finding, the mathematical model suggests that the use of continuous control or rodent vaccination is the only strategy that could lead to Lassa virus elimination. These field and model results can serve as a guide for determining how long and frequent rodent control should be done in order to eliminate Lassa virus in rural villages. The research was funded by the German Research Foundation (DFG FI 1781/1&2-1, LE SPP 1596, GU 883/3-1 and GU 883/3-2) and by the University of Antwerp and the Antwerp study centre for disease (ASCID) Grant Number GOA BOF FFB3567. Joachim Marien is a research fellow of the Flemish Interuniversity Council (VLIR-UOS). Benny Borremans is supported by the European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No. 707840. |
| Databáze: | OpenAIRE |
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