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- W4255887811 abstract "Abstract Over a third of the world’s population lives at risk of potentially severe Plasmodium vivax induced malaria. Unique aspects of the parasite’s biology and interactions with the human host make it harder to control and eliminate the disease. Glucose-6-phosphate dehydrogenase (G6PD) deficiency and Duffy-negative blood groups are two red blood cell variations that confer protection against malaria. Molecular genotyping was performed in 225 patients with severe and non-severe malaria, which revealed 29 (12.94%) carriers of the G6PD 202 AG/GG and 43 (19.19%) with G6PD 376 GA/AA . For the Duffy genotype, 70 (31.11%) were phenotyped as Fy(a + b-), 98 (43.55%) Fy(a + b+), 56 (24.9%) Fy(a-b+) and 1 (0.44%) Fy(a-b-). The FY*01/FY*02 genotype was more frequent in both non-severe and severe malaria. However, the frequency increased when SNP c.376A > G was also present. In women, the FY*01/FY*02 allele occurred concomitantly with c.376A > G more frequently in non-severe malaria, whereas in men, this synergism was more frequent in severe malaria. In addition, G202A/A376G genotypes were more frequent in severe malaria, with c.202G > A (RR = 5.57 – p < 0.001) and c.376A > G (RR: 4.49 – p < 0.001) strongly associated with the trials malaria (p < 0.001). Parasite count and density were not observed to specifically associate with variants in G6PD or Duffy. However, Duffy phenotype Fy(a-b+) (p = 0.003) and genotype FY*02/ FY*02 (p = 0.007) presented the highest values parasitemia density of the vivax malaria. Research on G6PD and Duffy antigen deficiencies has been valuable, particularly when focused on densely populated areas. We concluded that c.202G > A and c.376A > G SNPs were risk factors for the development of severe vivax malaria and that molecular diagnosis before treatment may be necessary in the Amazonian population and uncomplicated malaria showed a greater frequency of variation for GATA and G6PD variants than severe malaria." @default.
- W4255887811 created "2022-05-12" @default.
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- W4255887811 date "2020-07-28" @default.
- W4255887811 modified "2023-10-06" @default.
- W4255887811 title "Duffy Blood System and G6PD Genetic Variants in P. Vivax Malaria Patients From Manaus, Amazonas, Brazil" @default.
- W4255887811 doi "https://doi.org/10.21203/rs.3.rs-41862/v1" @default.
- W4255887811 hasPublicationYear "2020" @default.
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