Quantifying the effect of human population mobility on malaria risk in the Peruvian Amazon
Gabriel Carrasco-Escobar1,4, Jose Matta-Chuquisapon1,Edgar Manrique1, Jorge Ruiz-Cabrejos1,Jose Luis Barboza1, Daniel Wong1, German Henostroza5,Alejandro Llanos-Cuentas2,3and Tarik Benmarhnia6
1Health Innovation Lab, Institute of Tropical Medicine‘Alexander von Humboldt’, 2 Instituto de Medicinal Tropical Alexander von Humboldt, and 3 Facultad de Salud Pública y Administración, Universidad Peruana Cayetano Heredia, Lima, Peru 4 Herbert Wertheim School of Public Health and Human Longevity Science,University of California San Diego, La Jolla, CA, USA 5 University of Alabama at Birmingham, Birmingham, AL, USA 6 Scripps Institution of Oceanography, University of California, San Diego, CA, USA
The impact of human population movement (HPM) on the epidemiology of vector-borne diseases, such as malaria, has been described. However, there are limited data on the use of new technologies for the study of HPM in endemic areas with difficult access such as the Amazon. In this study conducted in rural Peruvian Amazon, we used self-reported travel surveys and GPS trackers coupled with a Bayesian spatial model to quantify the role of HPM on malaria risk. By using a densely sampled population cohort, this study highlighted the elevated malaria transmission in a riverine community of the Peruvian Amazon. We also found that the high connectivity between Amazon communities for reasons such as work, trading or family plausibly sustains such transmission levels. Finally, by using multiple human mobility metrics including GPS trackers, and adapted causal inference methods we identified for the first time the effect of human mobility patterns on malaria risk in rural Peruvian Amazon. This study provides evidence of the causal effect of HPM on malaria that may help to adapt current malaria control programmes in the Amazon.