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Hepatitis C is found worldwide. Depending on the country, hepatitis C virus infection can be concentrated in certain populations. Yet, people who inject drugs and people in prisons are not often included in national responses.

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A sexually transmitted parasite that's extraordinarily widespread gets even more dangerous when infected with a virus, researchers say. Scientists investigated the sexually transmitted disease trichomoniasiswhich is caused by the parasite Trichomonas vaginalisa type of microbe known as a protozoan. Rather than invade human cells, the parasite latches onto their surfaces and feeds on them.

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The Public Health Agency of Canada has updated the recommendation for prevention of sexual transmission of Zika. The previous recommendation was for returning male travellers to wait 6 months before trying for a pregnancy and to always use condoms correctly with their sexual partner for 6 months. This recommendation has been revised to 3 months based on new scientific evidence regarding the persistence of infectious Zika virus in semen.

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Protein fragments in human semen called amyloid fibrils significantly increase Ebola virus infection and protect the virus against harsh environmental conditions such as heat and dehydration, according to new research. Although Ebola is transmitted primarily through direct contact with blood and other bodily fluids from infected people, follow-up studies from the epidemic found that men can harbor the virus in their semen for at least 2. The researchers surmise that targeting amyloids in semen could prevent a sexually transmitted spread of the virus. Sexual transmission has also been linked to a resurgence of the virus in Guinea, which had previously been declared Ebola-free during the West Africa Ebola outbreak.

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Human T-cell lymphotropic virus type 1 HTLV-1 is endemic in many parts of the world and is primarily transmitted through sexual intercourse or from mother to child. Sexual transmission occurs more efficiently from men to women than women to men and might be enhanced by sexually transmitted diseases that cause ulcers and result in mucosal ruptures, such as syphilis, herpes simplex type 2 HSV-2and chancroid. Other sexually transmitted diseases might result in the recruitment of inflammatory cells and could increase the risk of HTLV-1 acquisition and transmission.

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A brief survey about counseling practices was distributed electronically to previous attendees of an International Antiviral Society—USA continuing medical education activity. Descriptive analyses were performed for all questions. Responses differed significantly by practitioner experience, region, sex and degree.

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Back to Health A to Z. Zika virus disease is mainly spread by mosquitoes. For most people it's a very mild infection and is not harmful.

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Scientists raised the possibility that the Zika virus can be transmitted by oral sex — perhaps even by kissing — on Friday in a letter to The New England Journal of Medicine describing one such case in France. A single incident may seem trivial. But until early this yearthere was only one known instance of sexual transmission of the Zika virus — a case in which a mosquito researcher just back from Africa infected his wife in Colorado. Now scientists believe that sexual transmission is an important driver of the Zika epidemic in the Americas.

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This page provides information for the general public on Zika virus. This is a rapidly changing situation. This website will be updated as new information becomes available.

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Email address:. The patient has received bone marrow stem cells for the past three years from a donor who carries a repressed version of the CCR5 gene. That's why our new email newsletter will deliver a mobile-friendly snapshot of inews. This will feature the stories you need to know, as well as a curated selection of the best reads from across the site.

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