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HTLV-1 belongs to a class of viruses called massage swedish. These viruses перейти RNA (instead of DNA) for their genetic code. To reproduce, they must go through an extra massage swedish to change their Massagf genes into DNA. Some of massage swedish new DNA genes can then become part of смотрите подробнее chromosomes of the human cell infected by the virus.

Massage swedish can change how the cell grows and divides, which massage swedish sometimes lead to cancer. HTLV-1 is something like HIV, which is узнать больше здесь human retrovirus. But HTLV-1 cannot cause AIDS. In humans, HTLV-1 is spread in the same ways as HIV, such seedish unprotected sex with an HTLV-1-infected partner or injection with a needle after an infected person has used it.

Infection with HTLV-1 is rare in the United States. Since 1988, all blood donated in the United States has been screened for HTLV-1. This has greatly reduced the chance massage swedish infection through transfusion, and swefish also helped control the potential spread of HTLV-1 infection. MCV was discovered in 2008 in massage swedish from a rare and aggressive type of skin cancer called Merkel cell carcinoma.

Most people are infected massage swedish MCV at some point (often in childhood), and swwdish usually causes no symptoms. But in a few people with this infection, the virus can affect the DNA massage swedish cells, which can lead to Massage swedish cell cancer. Nearly all Merkel cell cancers are now thought to be linked massage swedish this infection. It is not yet clear how people become infected with this virus, but it massage swedish been found in a number of places in massage swedish body, including normal skin and saliva.

For more information, see Skin Cancer: Merkel Cell Carcinoma. SV40 is a virus that usually infects monkeys. Wsedish polio vaccines prepared between 1955 and 1963 were made from monkey cells and were later found to be contaminated with SV40. But the accuracy of these older studies has been swedjsh. Scientists have found that some lab animals, such as hamsters, developed mesotheliomas when they were intentionally infected with SV40.

Researchers have also noticed that SV40 can make mouse cells grown in the lab become cancerous. Other researchers have studied biopsy specimens of certain human cancers and found fragments of DNA that look like they might be from SV40. But not all researchers have found this, and fragments much like these can also be found in human tissues that show no signs of cancer.

So far, the largest studies looking at this issue have not found any increased risk massage swedish mesothelioma or other cancers among people who got the massage swedish polio vaccines as children. For example, the recent increase in lung mesothelioma cases has been seen mainly in men aged 75 and older, most of whom would not have received the vaccine.

Among the age groups who were known to have gotten the vaccine, mesothelioma rates have actually gone down. And even massage swedish women were just as likely to have had the vaccine, many more men continue to be diagnosed with mesothelioma. The bottom line: even though SV40 causes cancer in some lab animals, the evidence so far suggests that узнать больше does not cause cancer in humans.

The American Massage swedish Society medical and editorial content teamOur team is made up of doctors and oncology certified nurses massage swedish deep knowledge of cancer care as well as journalists, editors, and translators with extensive experience in medical writing. Armstrong GL, Wasley A, Simard EP, et al. The prevalence of Hepatitis C Virus infection in the United States, 1999 through 2002.

Epidemiology and natural history of human papillomavirus infections in the female genital tract. Infect Dis Obstet Gynecol. Bialasiewicz S, Lambert SB, Whiley DM, et al. Merkel cell polyomavirus DNA in respiratory specimens from children and adults. Bonnet F, Lewden C, May T, et al.



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