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Table 2 Comparison of genotyping results and allele frequencies of the Duffy Blood Group System among blood donors and patients infected with P. vivax from Brazilian Amazon region.

From: Duffy blood group gene polymorphisms among malaria vivax patients in four areas of the Brazilian Amazon region

Duffy blood group system Brazilian Amazon Region  
Genotypes Predicted Phenotype Donors (n = 330) Patients P. vivax (n = 312) P
FYA/FYA Fy(a+b-) 43 51 0,2644
FYA/FY X Fy(a+b-) 3 5 0,4942
FYA/FYB-33 Fy(a+b-) 62 34 0,0055*
FYA/FYB Fy(a+b+) 90 109 0,0404*
FYB/FYB Fy(a-b+) 54 63 0,2208
FYB/FY X Fy(a-b+) 6 4 0,7530
FY X / FY X Fy(a-b-) - 2 0,2358
FYB/FYB-33 Fy(a-b+) 54 42 0,3205
FYB-33/FYB-33 Fy(a-b-) 18 2 0,0003*
Alelles   Alelles Frequencies  
FYA   0,365 0,400 0,2896
FYB   0,390 0,450 0,0351
FY X   0,014 0,021 0,5726
FYB-33   0,230 0,128 0,0000
  1. * Fisher's Exact Test.