Fig 1.
Ngella sampling sites and spatial distribution of P. vivax prevalence (qPCR).
The 9 island provinces of SI are shown in the top right inset. A (inset). Central Islands Province. B (inset). Ngella. B. Ngella study catchments and prevalence. Anchor Island (catchments shown in yellow), Bay (catchments in red), Channel (catchments in purple), North Coast (catchments in orange) and South Coast (catchments in blue). The size of the prevalence pie chart reflects village sample size.
Fig 2.
Age trends of P. vivax infections.
A: P. vivax blood stage parasite prevalence by LM and qPCR (error bars represent binomial 95% confidence intervals, CI95). B: P. vivax parasite densities by qPCR (18S DNA copies/l) and LM counts (parasites/l) (error bars represent 95% confidence intervals, CI95). C: Gametocyte prevalence (in the total sampled population) and positivity (only among P. vivax infected) (error bars represent 95% confidence intervals, CI95). D: P. vivax multiplicity of infection (MOI) of blood stage parasites (error bars represent 95% confidence intervals, CI95).
Table 1.
Multivariable associations with P. vivax infection.
Table 2.
Multivariable associations with P. vivax density estimates by qPCR.
Fig 3.
Diversity of P. vivax genotypic markers msp1F3 and MS16.
Allelic frequencies of P. vivax msp1F3, MS16 and the combined msp1F3 / MS16 haplotypes. For msp1F3 and MS16, the frequency of the four most common alleles and respective sizes (in basepairs) are shown. The number of unique alleles identified and the estimated expected heterozygosity (HE) are given below the figure.