Featured Research

from universities, journals, and other organizations

When AIDS viruses are transmitted despite treatment

Date:
June 24, 2013
Source:
Schweizerischer Nationalfonds zur Foerderung der wissenschaftlichen Forschung
Summary:
While antiretroviral drugs offer an efficient means of preventing the replication of HIV in the blood, shedding of HIV may occur in semen, so that other persons can become infected during unprotected sexual intercourse. This occurs in particular if the male genital tract also has other viral infections.

While antiretroviral drugs offer an efficient means of preventing the replication of HIV in the blood, shedding of HIV may occur in semen, so that other persons can become infected during unprotected sexual intercourse. This occurs in particular if the male genital tract also has other viral infections.

That is the conclusion reached by a scientist who is supported by the Swiss National Science Foundation (SNSF).

In principle, modern combination therapies are very effective at keeping AIDS causative agents in check. The treatment usually leads to a situation in which there is no longer any evidence of Human-Immunodeficiency Viruses (HIV) in the body. In this way, the drugs can also reduce the disease transmission rate to just one tenth. So why do new infections occur despite treatment?

Sperm containing a cocktail of viruses

The answer, according to findings recently published by the Swiss researcher Sara Gianella Weibel and her American colleagues, is that other viruses also play a role. Working at the University of California in San Diego, the SNSF-funded scientist studied the semen of 114 HIV-infected men undergoing treatment who have sex with men. She found that the seminal fluid of 11 of the men contained a considerable quantity of HI viruses, even though the viral load of the blood of all of the men was very low. In eight of these 11 cases, Gianella Weibel also found evidence of various forms of herpes.

Locally activated immune system

Some of these herpes viruses, such as cytomegalovirus, often remain unnoticed. However, if the viruses infect the male genital tract, they locally activate the immune system. As a result, there is a build-up of immune cells, including those in which HIV replicate, in the genital area. "Our data suggests that we must also direct our focus towards other viruses, if we really want to interrupt the transmission of AIDS," explains Gianella Weibel.


Story Source:

The above story is based on materials provided by Schweizerischer Nationalfonds zur Foerderung der wissenschaftlichen Forschung. Note: Materials may be edited for content and length.


Journal Reference:

  1. S. Gianella, D. M. Smith, M. V. Vargas, S. J. Little, D. D. Richman, E. S. Daar, M. P. Dube, F. Zhang, C. C. Ginocchio, R. H. Haubrich, S. R. Morris. Shedding of HIV and Human Herpesviruses in the Semen of Effectively Treated HIV-1-Infected Men Who Have Sex With Men. Clinical Infectious Diseases, 2013; DOI: 10.1093/cid/cit252

Cite This Page:

Schweizerischer Nationalfonds zur Foerderung der wissenschaftlichen Forschung. "When AIDS viruses are transmitted despite treatment." ScienceDaily. ScienceDaily, 24 June 2013. <www.sciencedaily.com/releases/2013/06/130624075731.htm>.
Schweizerischer Nationalfonds zur Foerderung der wissenschaftlichen Forschung. (2013, June 24). When AIDS viruses are transmitted despite treatment. ScienceDaily. Retrieved October 1, 2014 from www.sciencedaily.com/releases/2013/06/130624075731.htm
Schweizerischer Nationalfonds zur Foerderung der wissenschaftlichen Forschung. "When AIDS viruses are transmitted despite treatment." ScienceDaily. www.sciencedaily.com/releases/2013/06/130624075731.htm (accessed October 1, 2014).

Share This



More Health & Medicine News

Wednesday, October 1, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Ebola Cases Keep Coming for Monrovia's Island Hospital

Ebola Cases Keep Coming for Monrovia's Island Hospital

AFP (Oct. 1, 2014) A look inside Monrovia's Island Hospital, a key treatment centre in the fight against Ebola in Liberia's capital city. Duration: 00:34 Video provided by AFP
Powered by NewsLook.com
Ebola Puts Stress on Liberian Health Workers

Ebola Puts Stress on Liberian Health Workers

AP (Oct. 1, 2014) The Ebola outbreak is putting stress on first responders in Liberia. Ambulance drivers say they are struggling with chronic shortages of safety equipment and patients who don't want to go to the hospital. (Oct. 1) Video provided by AP
Powered by NewsLook.com
Doctors Reassure Public Ebola Patient Won't Cause Outbreak

Doctors Reassure Public Ebola Patient Won't Cause Outbreak

Newsy (Sep. 30, 2014) After the announcement that the first U.S. patient had been diagnosed with Ebola, doctors were quick to say a U.S. outbreak is highly unlikely. Video provided by Newsy
Powered by NewsLook.com
TX Hospital Confirms Patient Admitted With Ebola

TX Hospital Confirms Patient Admitted With Ebola

AP (Sep. 30, 2014) Medical officials from Texas Health Presbyterian Hospital confirm they are treating a patient with the Ebola virus, the first case found in the US. (Sept. 30 Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins