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Table 3 Comparison of the parasite prevalence, parasite density and the MOI in different age groups and haemoglobin (Hb) phenotypes

From: Genetic polymorphism of merozoite surface protein 2 and prevalence of K76T pfcrt mutation in Plasmodium falciparum field isolates from Congolese children with asymptomatic infections

  Age groups P Hb type P
1-3 4-6 7-9 AA AS
N = 137 N = 96 N = 80 N = 255 N = 58
Parasite prevalence n(%)        
Microscopy 5 (3.5%) 11 (11%) 11(14%) 0.018 19 (7.5%) 8 (13.5%) NS
PCR 12 (8.8%) 18 (17%) 21(26%) 0.002 40 (15.5%) 11 (19%) NS
Geometric mean parasite density (p/μl) 1,246 3,442 3,024 NS 4,052 2,081 NS
Mean MOI 1.3 1.3 1.2 NS 1.3 1.4 NS
Proportion of multiple infections* 4/12(33.3%) 5/18(27.8%) 4/21(19%) NS 8/40(19%) 3/11(27%) NS
  1. * Proportion of multiple infections in PCR positive samples, NS non significant