Temporal and Microspatial Heterogeneity in Transmission Dynamics of Coendemic Plasmodium vivax and Plasmodium falciparum in Two Rural Cohort Populations in the Peruvian Amazon

Rosas Aguirre, Angel;Guzman-Guzman, Mitchel;Chuquiyauri, Raul;Moreno, Marta;Llanos-Cuentas, Alejandro;et.al.
(2001) The Journal of Infectious Diseases — Vol. 223, n° 8, p. 1466-1477 (2021)

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Authors
  • Rosas Aguirre, Angelorcid-logoUCLouvain
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  • Guzman-Guzman, Mitchel
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  • Chuquiyauri, Raul
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  • Moreno, Marta
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  • Speybroeck, NikoUCLouvain
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  • Llanos-Cuentas, Alejandro
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Abstract
Background.Malaria is highly heterogeneous: its changing malaria microepidemiology needs to be addressed to support ma-laria elimination efforts at the regional level.Methods.A 3-year, population-based cohort study in 2 settings in the Peruvian Amazon (Lupuna, Cahuide) followed partici-pants by passive and active case detection from January 2013 to December 2015. Incidence and prevalence rates were estimated using microscopy and polymerase chain reaction (PCR).Results.Lupuna registered 1828 infections (1708 Plasmodium vivax, 120 Plasmodium falciparum; incidence was 80.7 infec-tions/100 person-years (95% confidence interval [CI] , 77.1–84.5). Cahuide detected 1046 infections (1024 P vivax, 20 P falciparum, 2 mixed); incidence was 40.2 infections/100 person-years (95% CI, 37.9–42.7). Recurrent P vivax infections predominated on-wards from 2013. According to PCR data, submicroscopic predominated over microscopic infections, especially in periods of low transmission. The integration of parasitological, entomological, and environmental observations evidenced an intense and seasonal transmission resilient to standard control measures in Lupuna and a persistent residual transmission after severe outbreaks were intensively handled in Cahuide.Conclusions.In 2 exemplars of complex local malaria transmission, standard control strategies failed to eliminate submicro-scopic and hypnozoite reservoirs, enabling persistent transmission
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Rosas Aguirre, A., Guzman-Guzman, M., Chuquiyauri, R., Moreno, M., Manrique, P., Ramirez, R., Carrasco-Escobar, G., Rodriguez, H., Speybroeck, N., Conn, J. E., Gamboa, D., Vinetz, J. M., & Llanos-Cuentas, A. (2001). Temporal and Microspatial Heterogeneity in Transmission Dynamics of Coendemic Plasmodium vivax and Plasmodium falciparum in Two Rural Cohort Populations in the Peruvian Amazon. The Journal of Infectious Diseases, 223(8), 1466-1477. https://doi.org/10.1093/infdis/jiaa526 (Original work published 2021)