Table 1.
Characteristics of the subjects with P. falciparum sub-microscopic infections in Igbo-Ora village, Nigeria
| Factor | Number of subjects | aSex (F/M) | bNets (%) | cPCV | dP |
|---|---|---|---|---|---|
| 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 |
| eMinimum 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) | |
a Sex: F, female; M, male
b Nets: indicates the use of bed and/or window nets; actual numbers and proportion of subjects (%).
c PCV: mean packed cell volume (SD)
d P value for differences in PCV; nd: not done
e Number of MSP1 genotypes was determined by PCR, the presence of 1 or more indicates the presence of parasites.
*Four samples did not produce a PCR product with the MSP1 primers