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Table 3 Prevalence and levels of antibodies to the OR domain of the P. falciparum P126 protein in Candeias do Jamari and Peixoto de Azevedo groups regardless of the infection patterns.

From: Evaluation of the genetic polymorphism of Plasmodium falciparum P126 protein (SERA or SERP) and its influence on naturally acquired specific antibody responses in malaria-infected individuals living in the Brazilian Amazon

  PA (a) CJ-1993 (b) CJ-2002 (c) P values
IgG 71/90 (79%) 53/76 (70%) 58/78 (74%) n.s.
  4.5 ± 2.8 4.9 ± 3.0 8.6 ± 8.3 a × c: 0.0006; b × c: 0.002
IgM 49/90 (54%) 43/68 (63%) 63/78 (81%) a × c: 0.0006; b × c: 0.02
  2.3 ± 1.5 3.4 ± 2.0 4.9 ± 4.8 a × c: 0.0002; b × c: 0.04
IgG1 45/70 (64%) 43/49 (87%) 14/58 (24%) a × b: 0.007; a × c: < 0.0001; b × c: < 0.0001
  2.3 ± 2.0 3.2 ± 2.0 1.9 ± 0.7 b × c: 0.001
IgG2 5/70 (7%) 7/49 (14%) 21/58 (36%) a × c: 0.0001; b × c: 0.01
  1.3 ± 0.4 2.8 ± 2.8 1.3 ± 0.4 n.s.
IgG3 68/70 (97%) 47/49 (96%) 35/58 (60%) a × c: < 0.0001; b × c: < 0.0001
  8.1 ± 6.4 10.2 ± 9.7 7.9 ± 6.1 n.s.
IgG4 30/70 (43%) 23/49 (47%) 24/58 (41%) n.s.
  1.3 ± 0.2 1.6 ± 0.7 2.5 ± 2.2 n.s.
  1. The data represent the number of responders/number of tested individuals (the percentage of responders is given in parentheses) and the antibody levels expressed as mean of OD index ± SD. The Student's t-test was used to analyse the differences in mean values, the Chi-square test was used to analyse the difference in prevalence of positive responses.