Table 1.
Comparison of mutation frequencies of single nucleotide polymorphisms in the pfdhfr, pfmdr1, pfcrt, and pfATP6 genes associated with drug-resistance between samples collected from Plasmodium falciparum-infected patients working/living in mining areas and villagers (nonminers)
Gene and positions | % mutation in miners | % mutation in villagers |
---|---|---|
pfdhfr | ||
A16V | 0% (n=27) | 0% (n=30)a |
N51I | 100% (n=27) | 100% (n=30)a |
C59R | 0% (n=26) | 0% (n=30)a |
S108N | 100% (n=28) | 100% (n=30)a |
I164L | 0% (n=27) | 0% (n=30)a |
pfmdr1 | ||
N86Y | 0% (n=27) | 0% (n=40)b |
Y184F | 100% (n=27) | 100% (n=40)b |
S1034C | 96% (n=26) | 95% (n=40)b |
N1042D | 100% (n=28) | 100% (n=40)b |
D1246Y | 100% (n=28) | 100% (n=40)b |
pfcrt | ||
K76T | 100% (n=28) | 100% (n=40)b |
pfATP6 | ||
L263E | 0% (n=28) | 0% (n=24)c |
A623E | 0% (n=27) | 0% (n=24)c |
S769N | 0% (n=27) | 0% (n=24)c |
Notes:
Isolates from 2002 (unpublished data);
isolates from 2005–2006 (data from Adhin et al19);
isolates from 2002–2006 (data from Adhin et al13). The letters are abbreviations for different amino acids in the pfdhfr, pfmdr1, and pfcrt gene products. n represents the number of successfully amplified samples for the respective position in each study.