Is Abetalipoproteinemia contagious?

Abetalipoproteinemia is not contagious and cannot be spread from person to person through touch, air, or any form of social contact. It is a rare, inherited genetic disorder, meaning it is present from birth due to specific mutations in an individual's DNA, and it poses absolutely no risk of infection to family members, caregivers, or friends.

What causes Abetalipoproteinemia?

Abetalipoproteinemia is a metabolic condition caused by mutations in the MTTP gene. This gene provides instructions for creating a protein essential for the assembly and secretion of lipoproteins (like LDL) in the intestines and liver. Because the body cannot properly process dietary fats and fat-soluble vitamins (A, D, E, and K), individuals with Abetalipoproteinemia experience malabsorption, which can lead to neurological and vision-related complications if left untreated.

Is Abetalipoproteinemia hereditary?

Yes, Abetalipoproteinemia is an autosomal recessive disorder. This means that an affected individual must inherit two copies of the mutated gene—one from each parent. Parents who are carriers of the gene mutation typically do not show symptoms themselves, but there is a 25% chance with each pregnancy that a child will be born with this condition. Because Abetalipoproteinemia is strictly genetic, it is impossible to "catch" it from someone else.

Why do misconceptions about contagion exist?

Rare diseases like Abetalipoproteinemia are often misunderstood by the general public. Because the condition requires specialized medical diets and can cause physical symptoms like failure to thrive or neurological weakness, some may incorrectly assume the condition is an infectious illness. It is important to emphasize that:

• Living with or touching someone with Abetalipoproteinemia is 100% safe.


• Sharing food, utensils, or living spaces with an affected person carries zero risk of transmission.


• There are no environmental "triggers" or pathogens that cause the onset of this disease.

Next steps

• Consult with a board-certified clinical geneticist to understand family inheritance patterns.


• Work with a metabolic specialist or gastroenterologist to manage fat-soluble vitamin supplementation.


• Join the 19 members of the Abetalipoproteinemia community on DiseaseMaps.org to share experiences and find support.

Medical disclaimer: This content is for informational purposes only and does not constitute professional medical advice, diagnosis, or treatment.

References

• NIH Genetic and Rare Diseases Information Center (GARD): Abetalipoproteinemia


• Orphanet: Rare Disease Database (ORPHA:10)


• Online Mendelian Inheritance in Man (OMIM): #200100