Interdisciplinary Perspectives on Infectious Diseases

Research Article

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

Table 3

Phenotypes and allele frequencies of blood group systems according clinical phases by area study, Bagua, Amazonas, Peru.


Group		Area						clinical phases between areas
		Tomocho-Collicate-Vista Hermosa ()*			Miraflores ()*
		Cases in chronic phase only ()	No reported disease ()		Cases in acute phase only ()	No reported disease ()

MN	MM	8	7	0.759	5	12	0.555	0.761
	MN	12	10		6	8
	NN	2	0		1	3
	M	28 (0.6364)	24 (0.7059)	0.518	16 (0.6667)	32 (0.6957)	0.804	0.803
	N	16 (0.3636)	10 (0.2941)	0.518	8 (0.3333)	14 (0.3043)	0.804	0.803

Ss	SS	6	4	0.791	3	6	0.944	0.886
	Ss	14	10		8	14
	ss	2	3		1	3
	S	26 (0.5910)	18 (0.5294)	0.587	14 (05834)	26 (0.5653)	0.884	0.952
	s	18 (0.4090)	16 (0.4706)	0.587	10 (0.4166)	20 (0.4347)	0.884	0.952

Diego	Di (a+)	4	2	0.679	2	5	1.000	1.000
	Di (a−)	18	15	0.679	10	18	1.000	1.000
	Di a	4 (0.0909)	2 (0.0588)	0.691	2 (0.0833)	5 (0.1086)	1.000	1.000
	No Di a	40 (0.9091)	32 (0.9412)	0.691	22 (0.9167)	41 (0.8914)	1.000	1.000

Duffy	Fy (a+ b−)	8	6	0.945	4	9	0.736	0.850
	Fy (a+ b+)	9	8		6	9
	Fy (a− b+)	5	3		2	5
	Fy (a− b−)	0	0		0	0
	Fy a	25 (0.5692)	20 (0.5883)	0.859	14 (0.5334)	27 (0.5870)	0.977	0.904
	Fy b	19 (0.4318)	14 (04117)	0.859	10 (0.4166)	19 (0.4130)	0.977	0.904

One individual of the Tomocho-Collicate-Vista Hermosa had acute phase and was removed from this analysis, reducing our sample from 40 to 39 individuals. In a similar way, one individual from Miraflores presented chronic phase and was also removed from the analysis, reducing the number from 36 to 35 individuals.
^aIn the comparisons of phenotypes and allele frequencies, considering clinical phases and healthy individuals (2 2 clusters), no significant statistical differences (, Chi-square or Fisher’s exact tests) were found in each area.
^bIn the comparisons of phenotypes and allele frequencies, considering only clinical phases (2 2 clusters), no significant statistical differences (, Chi-square or Fisher’s exact tests) were found between the two areas.