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Duffy blood group (malaria resistance)

DARC / ACKR1 · rs2814778

Where this position leads

Condition: Duffy-Null Phenotype and Benign Ethnic Neutropenia

rs2814778 Condition: Duffy-Null Phenotype and Benign Ethnic Neutropenia Duffy-Null Phenotype and Benign Eth… Condition Topic: Natural selection Natural selection Topic rs2814778 rs2814778 DARC / ACKR1

Solid lines are connections this site curates. Dashed lines mean the two ends share a research paper — worth knowing, and not a claim that one explains the other.

What ClinVar records

Classification association; protective for Resistance to Plasmodium vivax infection, DUFFY BLOOD GROUP SYSTEM, FY(a-b-) PHENOTYPE, White blood cell count quantitative trait locus 1; no assertion criteria provided (0 of 4 stars, 2 submitters), last evaluated 2017-12-11. ClinVar record 18395 NM_002036.3(ACKR1):c.-67T>C

What this is ClinVar's aggregate record for this position (as of its 2026-10-19 release), not a result about you. A classification describes the variant against the condition named, as laboratories submitted it. Whether a person carries this variant, and what that would mean for them, is a question for a clinical test and a genetic counsellor.

What each result means

C/C Published research associates this genotype with typical Duffy antigen expression on red blood cells.
C/T One copy of the variant. Published research associates this genotype with reduced Duffy antigen expression.
T/T Published research associates this genotype with absence of the Duffy antigen on red blood cells (the "Duffy-null" phenotype) — this is common in populations of West African ancestry and is associated with natural resistance to Plasmodium vivax malaria infection, since that parasite uses the Duffy antigen to enter red blood cells.
Source

What people read about alongside this

Papers in Europe PMC whose title or abstract names both this rsID and that subject. A shared paper means somebody wrote about the two together — it is not a claim that this position explains the subject.

Questions about rs2814778

What is rs2814778?

rs2814778 is a single position in the genome, in or near the DARC / ACKR1 gene. Published research associates it with duffy blood group (malaria resistance). A single variant does not decide an outcome — it shifts a probability, and for most common variants the shift is small.

What conditions is rs2814778 linked to?

On MyGeneLog this position is linked to Duffy-Null Phenotype and Benign Ethnic Neutropenia. The research behind each link, and its sources, are set out on that condition page.

What do people read about alongside rs2814778?

Subjects that appear in the title or abstract of the same papers as this rsID include natural selection (3 papers), heart and circulation (1 papers), liver (1 papers), kidneys (1 papers). A shared paper means somebody wrote about the two together; it is not a claim that this position explains the topic.

Does having rs2814778 mean I will get this?

No. Common variants like this one move a probability slightly and, on their own, rarely decide anything about one person. Nothing on this page is a diagnosis, and health decisions should be made with a clinician who can see your whole picture.

Where does the information about rs2814778 come from?

Miller et al. 1976, New England Journal of Medicine — the Duffy blood group phenotype and resistance to Plasmodium vivax malaria. PMID 778616. Every variant on MyGeneLog comes from public primary sources and is published with its citation and the date it was checked.

Quoting this page

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Duffy blood group (malaria resistance) (rs2814778). MyGeneLog™. https://www.mygenelog.com/variants/rs2814778

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