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Title: Infectivity of symptomatic and asymptomatic Plasmodium vivax infections to a Southeast Asian vector, Anopheles dirus
Authors: Kirakorn Kiattibutr
Wanlapa Roobsoong
Patchara Sriwichai
Teerawat Saeseu
Nattawan Rachaphaew
Chayanut Suansomjit
Sureemas Buates
Thomas Obadia
Ivo Mueller
Liwang Cui
Wang Nguitragool
Jetsumon Sattabongkot
Mahidol University
Institut Pasteur, Paris
Walter and Eliza Hall Institute of Medical Research
Pennsylvania State University
Keywords: Immunology and Microbiology
Issue Date: 1-Feb-2017
Citation: International Journal for Parasitology. Vol.47, No.2-3 (2017), 163-170
Abstract: © 2016 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 >10 parasites/μl. 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.
ISSN: 18790135
Appears in Collections:Scopus 2016-2017

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