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Table 1 Characteristics of the subjects with P. falciparu m sub-microscopic infections in Igbo-Ora village, Nigeria

From: Fine specificity of anti-MSP119 antibodies and multiplicity of Plasmodium falciparum Merozoite Surface Protein 1 types in individuals in Nigeria with sub-microscopic infection

Factor Number of subjects aSex (F/M) bNets (%) cPCV d P
Age (years)      
<1 38 20/18 32 (84) 31.7 (6.8) <0.0001
1 - 5 24 16/8 24 (100) 33.4 (2.7) -
6 - 15 36 20/16 26 (72) 37.0 (3.7) -
>15 49 37/12 38 (77) 39.5 (4.5) -
Haemoglobin phenotype      
AA 135 85/50 111 (82) 34.7 (5.7) ref
AS 11 7/4 8 (73) 38.2(4.7) 0.14
AC 1 1/0 1 (100) 30 nd
e Minimum number of MSP1 genotypes      
0 to 1* 74 48/26 62 (84) 34.6 (5.3) 0.86
2 to 3 68 41/27 54 (79) 35.0 (6.1) -
4 to 5 5 4/1 4 (80) 35.8 (2.3) -
Total 147 93/54 120 (82) 34.8 (5.6)  
  1. a Sex: F, female; M, male
  2. b Nets: indicates the use of bed and/or window nets; actual numbers and proportion of subjects (%).
  3. c PCV: mean packed cell volume (SD)
  4. d P value for differences in PCV; nd: not done
  5. e Number of MSP1 genotypes was determined by PCR, the presence of 1 or more indicates the presence of parasites.
  6. *Four samples did not produce a PCR product with the MSP1 primers