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. Author manuscript; available in PMC: 2013 Aug 12.
Published in final edited form as: Am J Trop Med Hyg. 2007 Jun;76(6):997–1008.

Figure 5.

Figure 5

Risk of acquiring new infections in relations to age and increasing density cut-offs. Values are adjusted hazard ratios and 95% confidence intervals. ● = Plasmodium falciparum (Pf); ○ = P. vivax (Pv). Because of low number of infections, no age effect for Pv parasitemias > 1,000/mL was estimated. LDR-FMA = positive by post–polymerase chain reaction ligation detection reaction–fluorescent microsphere assay; LM = positive by light microscopy. Shown are species-specific density cut-offs: higher cut-offs for Pf are set at species-specific pyrogenic thresholds and lower cut-offs set at approximately 1.5 times the geometric mean density observed at baseline.