Short answer · Medically reviewed summary · Last updated: 2026-05-08
Factor V deficiency is a rare bleeding disorder and is not contagious; it cannot be spread through touch, blood contact, or any form of social interaction. It is an inherited or, in rare cases, acquired medical condition, meaning it is biologically impossible to "catch" it from another person. What causes Factor V deficiency? Factor V deficiency (also known as Owren's disease or parahemophilia) is primarily caused by a genetic mutation in the F5 gene.
Is Factor V Deficiency contagious?
Is Factor V Deficiency contagious? Clear, medically reviewed answer on transmission, with sources.
Factor V deficiency is a rare bleeding disorder and is not contagious; it cannot be spread through touch, blood contact, or any form of social interaction. It is an inherited or, in rare cases, acquired medical condition, meaning it is biologically impossible to "catch" it from another person.
What causes Factor V deficiency?
Factor V deficiency (also known as Owren's disease or parahemophilia) is primarily caused by a genetic mutation in the F5 gene. This gene provides instructions for making the Factor V protein, which is essential for the blood clotting process. Because it is a genetic condition, individuals are typically born with it, having inherited the mutation from their parents in an autosomal recessive pattern. In rarer circumstances, Factor V deficiency can be acquired later in life due to autoimmune reactions where the body produces antibodies that attack its own Factor V proteins.
Why is there confusion regarding contagion?
Because Factor V deficiency involves the blood, people sometimes mistakenly associate it with transmissible blood-borne infections like HIV or Hepatitis. This is a common misconception. Living with, hugging, or being in close proximity to someone with Factor V deficiency poses absolutely zero risk to your health. There are no environmental triggers that can cause a healthy person to develop this condition through contact with a patient.
What are the key facts about the condition?
Understanding the nature of the disorder helps reduce stigma and anxiety for families. Key facts include:
- Inheritance: In its congenital form, Factor V deficiency is autosomal recessive, meaning both parents must carry the gene for a child to be affected.
- Prevalence: It is extremely rare, occurring in approximately 1 in 1,000,000 individuals worldwide.
- Safety: There is no risk of transmission through saliva, sweat, or blood-to-blood contact.
- Management: Treatment focuses on replacing the missing clotting factor via plasma infusions, not on preventing "spread."
Next steps
- Consult a hematologist for accurate diagnosis and personalized management plans.
- Join the Factor V deficiency community on DiseaseMaps.org to connect with others who understand the diagnosis.
- Educate family and friends using reliable resources to eliminate social stigma.
- Maintain a medical alert bracelet to ensure emergency responders are aware of your bleeding disorder.
Medical disclaimer: This content is for informational purposes only and does not constitute professional medical advice, diagnosis, or treatment; always seek the advice of your physician with any questions regarding a medical condition.
References
- NIH Genetic and Rare Diseases Information Center (GARD): Factor V Deficiency
- Orphanet: Rare bleeding disorder database
- Online Mendelian Inheritance in Man (OMIM): Factor V Deficiency entry
- World Federation of Hemophilia (WFH) Guidelines
