Five viruses, a chemical, and a metallic element listed in new HHS report
Today's release of the U.S. Department of Health and Human Services 14th Report on Carcinogens includes seven newly reviewed substances, bringing the cumulative total to 248 listings.
The chemical trichloroethylene (TCE), and the metallic element cobalt and cobalt compounds that release cobalt ions in vivo, are being added to the list, as well as five viruses that have been linked to cancer in humans. The five viruses include human immunodeficiency virus type 1, human T-cell lymphotropic virus type 1, Epstein-Barr virus, Kaposi sarcoma-associated herpesvirus, and Merkel cell polyomavirus.
"Given that approximately 12 percent of human cancers worldwide may be attributed to viruses, and there are no vaccines currently available for these five viruses, prevention strategies to reduce the infections that can lead to cancer are even more critical," said Linda Birnbaum, Ph.D., director of the National Institute of Environmental Health Sciences (NIEHS) and National Toxicology Program (NTP). "The listings in this report, particularly the viruses, bring attention to the important role that prevention can play in reducing the world's cancer burden. There are also things people can do to reduce their exposure to cobalt and TCE."
The Report on Carcinogens is a congressionally mandated report prepared for the HHS Secretary by NTP. The report identifies many different types of environmental factors, collectively called substances, including chemicals; infectious agents, such as viruses; physical agents, such as X-rays and ultraviolet radiation; mixtures of chemicals; and exposure scenarios in two categories ‰?? known to be a human carcinogen and reasonably anticipated to be a human carcinogen. The new report is available at http://ntp.niehs.nih.gov/go/roc14.
It's important to note that a listing in the report indicates a cancer hazard, but does not by itself mean that a substance or a virus will cause cancer. Many factors, including an individual's susceptibility to a substance, and the amount and duration of exposure, can affect whether a person will develop cancer. In the case of viruses, a weakened immune system may also be a contributing factor. People should talk to their health care providers about decreasing their cancer risk from viruses.
This e-mail is from DCHAS-L, the e-mail list of the ACS Division of Chemical Health and Safety.
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