Is Huntington's disease contagious?

Huntington's disease is not contagious and cannot be spread from one person to another through direct or indirect contact, unlike viral or bacterial diseases. It is a genetic disorder resulting from a genetic mutation that is passed down through families [1].

What is Huntington's disease?

Huntington's disease is a progressive brain disorder that leads to the breakdown of nerve cells in certain areas of the brain, particularly those that control voluntary movement [2]. This breakdown causes symptoms including involuntary movements (chorea), emotional issues, and a decline in cognitive abilities, such as thinking and decision-making [1]. Symptoms typically appear in adulthood, between the thirties and forties, but there is a rare form called juvenile Huntington's disease that begins in childhood or adolescence [1].

How is Huntington's disease transmitted?

Huntington's disease is inherited from parents to children [2]. The disease occurs due to a mutation in a specific gene responsible for producing the huntingtin protein (HTT) [2]. This mutation consists of an abnormal repetition of a specific DNA sequence (CAG) [2]. If a person has 36 or more repeats of this sequence, they will develop the disease [2].

Inheritance in Huntington's disease is autosomal dominant, which means a child only needs to inherit one copy of the mutated gene from one biological parent to develop the disease [1]. If one parent has Huntington's disease, each child has a 50% chance of inheriting the mutated gene and consequently developing the disease [2]. If the child does not inherit the mutated gene, they will not develop the disease and will not be able to pass it on to future generations [2].

Diagnosis and Genetic Testing

Huntington's disease is diagnosed based on clinical symptoms, a neurological examination, family history, and laboratory tests [2]. Genetic testing is considered the most accurate method to confirm the diagnosis, where the number of CAG repeats in the HTT gene is counted from a blood sample [2]. Prenatal testing can also be performed for individuals who have a family history of the disease and wish to know the risk of passing it on to their children [2].

Managing Life with the Disease

Although there is currently no cure to stop or reverse the progression of Huntington's disease, treatments are available to manage the symptoms [2]. These treatments include medications that help control involuntary movements (chorea), as well as medications that treat psychiatric symptoms such as depression and anxiety [2]. Doctors may also recommend physical therapy, occupational therapy, and speech therapy to help patients cope with daily challenges [2]. More information about the symptoms, diagnosis, and managing life with this disease can be found by visiting Huntington's disease: Symptoms, diagnosis, and management (Arabic).

It is important for people with a family history of Huntington's disease to speak with a healthcare professional or a genetic counselor to discuss potential risks and available testing options [2]. This can help them make informed decisions regarding their health and their family's health.

Medical references

• Huntington disease
• Huntington's Disease