Is Alzheimer’s really contagious?

The largest number of elderly patients with dementia ———Alzheimer’s disease may be contagious, according to a new study by the British journal Nature, published September 10 for patients with the disease. However, from the United States, the United Kingdom, as well as the domestic medical experts interviewed in this paper that the conclusion that the evidence is insufficient, Alzheimer’s disease will not like the cold in the same communication between people, we do not need to panic.


The study found that as a contagious brain disease, the accidental spread of some “contaminated” amyloid in the patient’s body may lead to infection, and the amyloid abnormalities also occur in Alzheimer’s patients, and researchers speculate that Alzheimer’s disease may be contagious.

As early as 2011, an animal experiment at the University of Texas School of Medicine found that the underlying mechanism of Alzheimer’s was very similar to that of an infectious prion disease such as Jacques Jakob disease. The occurrence of Alzheimer’s disease is related to a normal egg white hair deformity, which is the change of good protein into bad protein and then spread, the villain white plaque deposition, killing nerve cells, resulting in cognitive dysfunction. In the new study, John Klinger, a researcher at University College London and his colleagues, analyzed the brains of 8 patients with 31~51岁, who were aged between the two, who died when they injected human growth hormone into their childhood and became infected with the disease. The results found that amyloid deposition occurred in 6 of the 8 patients. Dr. Kringle believes that in patients undergoing medical and surgical procedures, if amyloid is accidentally transmitted, contaminated surgical instruments can lead to a rare but potentially infectious risk of Alzheimer’s disease.

The researchers noted that the study was of scientific value and that the results could help people better understand Alzheimer’s disease. But the new findings are inconclusive, and do not mean that Alzheimer’s disease must be contagious, and that contact with Alzheimer’s patients does not infect the disease, so don’t panic. There are too many questions to answer before you reach a definitive conclusion. Dr. Kringle says more in-depth research is needed on the issue of Alzheimer’s disease.

Zhang Zhenxin, chief physician of Neurology Department of Beijing Union Hospital, told the Life Times reporter Alzheimer’s disease is an aggravating neurodegenerative disease, which is characterized by mild dementia, moderate dementia, severe dementia, and end-stage, leading to decreased ability to live, memory loss, cognitive decline, and mental disorders. In addition, the causes of dementia include: Brain arteriosclerosis , encephalitis, Gram-Jakob disease, AIDS and so on.

Executive director of the China Alzheimer’s Disease Commission, Choliyan, chief physician of Yuquan Hospital, the second affiliated Hospital of Tsinghua University, told the Life Times reporter that the disease is progressing quickly, manifested in dementia, abnormal mental behavior, muscular array, ataxia, and so on, from the onset to death, it only takes a few months While Alzheimer’s disease is hidden, it is difficult to find early in the disease, clinically from the characteristics of the disease to bedridden often experienced 10 years or even longer. Since the disease itself is highly contagious and can be transmitted through bodily fluids and cerebrospinal fluid, and the etiology of Alzheimer’s disease is unclear, whether it is related to infection or not, there is no evidence that Alzheimer’s disease is transmitted to humans, and so far, this conclusion is not tenable.

Eric Karen, director of the Alzheimer’s Research Center in the UK, says the biggest risk factor for Alzheimer’s is age, genetic factors and lifestyle factors. Even if further research confirms that there is a link between pre-existing tissue contamination and Alzheimer’s disease, the affected population is only a very limited minority. 

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