Frequencies of Blood Group Systems MNS, Diego, and Duffy and Clinical Phases of Carrion’s Disease in Amazonas, Peru

Table 2

Distribution of blood group systems by area, Bagua, Amazonas, Perú.

Group	Phenotypes	Tomocho-Collicate-Vista Hermosa				Miraflores				𝑃; phenotypes	𝑃; alleles
		𝑛=40	Phenotype frequency	Allele	Allele frequency	𝑛=36	Phenotype frequency	Allele	Allele frequency
MN	MM	15	0.375	M	0.6625	18	0.500	M	0.6945	0.232	0.674
	MN	23	0.575	N	0.3375	14	0.389	N	0.3055
	NN	2	0.050			4	0.111
Ss	SS	10	0.250	S	0.5625	10	0.278	S	0.5835	0.955	0.796
	Ss	25	0.625	s	0.4375	22	0.611	s	0.4165
	Ss	5	0.125			4	0.111
Diego	Di (a+)	6	0.150	Di a	0.0750	7	0.194	Di a	0.0972	0.607	0.625
	Di (a−)	34	0.850	No Di a	0.9250	29	0.806	No Di a	0.9027
Duffy	Fy (a+b−)	14	0.350	Fy a	0.5750	13	0.361	Fy a	0.5695	0.952	0.945
	Fy (a+ b+)	18	0.450	Fy b	0.4250	15	0.417	Fy b	0.4305
	Fy (a− b+)	8	0.200			8	0.222
	Fy (a− b−)	0	0.000			0	0.000

Phenotype frequencies (in this case also genotype) of MN blood group system, the most variable, are in Hardy-Weinberg equilibrium (𝑃>0.05, Chi-square test). In the comparisons of phenotypes and allele frequencies of blood group systems, no significant statistical differences (𝑃>0.05, Chi-square or Fisher’s exact tests) were found between the two areas.