Infectivity of symptomatic and asymptomatic Plasmodium vivax infections to a Southeast Asian vector, Anopheles dirus

Kiattibutr, K; Roobsoong, W; Sriwichai, P; Saeseu, T; Rachaphaew, N; Suansomjit, C; Buates, S; Obadia, T; Mueller, I; Cui, L; Nguitragool, W; Sattabongkot, J

Author(s): Kiattibutr, K; Roobsoong, W; Sriwichai, P; Saeseu, T; Rachaphaew, N; Suansomjit, C; Buates, S; Obadia, T; Mueller, I; Cui, L; Nguitragool, W; Sattabongkot, J;
Details: Publication Year 2017-12-30,Volume 47,Issue #2-3,Page 163-170
Journal Title: Int J Parasitol
Publication Type: Journal Article
Abstract: Plasmodium vivax is now the predominant species causing malarial infection and disease in most non-African areas, but little is known about its transmission efficiency from human to mosquitoes. Because the majority of Plasmodium infections in endemic areas are low density and asymptomatic, it is important to evaluate how well these infections transmit. Using membrane feeding apparatus, Anopheles dirus were fed with blood samples from 94 individuals who had natural P. vivax infections with parasitemias spanning four orders of magnitude. We found that the mosquito infection rate was positively correlated with blood parasitemia and that infection began to rise when parasitemia was >10parasites/mul. Below this threshold, mosquito infection is rare and associated with very few oocysts. These findings provide useful information for assessing the human reservoir of transmission and for establishing diagnostic sensitivity required to identify individuals who are most infective to mosquitoes.
Publisher: Elsevier
Research Division(s): Population Health And Immunity
PubMed ID: 28043858
Publisher's Version: https://doi.org/10.1016/j.ijpara.2016.10.006
Terms of Use/Rights Notice: Refer to copyright notice on published article.

Creation Date: 2017-05-26 03:48:51

Last Modified: 2017-05-26 03:58:51