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Sexual transmission news

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Contraception
Contraceptive injections and HIV infection risk – a public health conundrum

The concerns about a possible increase in risk of HIV acquisition with some hormonal contraceptive methods need to be understood in the context of the

Published
10 March 2013
By
Roger Pebody
Sexual transmission
HIV exploits a human cytokine in semen to promote its own transmission

A new report suggests that the concentration of one human cytokine, interleukin 7 (IL-7), in the semen of HIV-1-infected men may be a key determinant of the efficiency of HIV-1 transmission to an uninfected female partner.

Published
07 March 2013
From
EurekAlert (press release)
Sexual transmission
Black gay men run higher risk of HIV infection despite fewer partners

An analysis of four studies of sexual risk and HIV infection in US gay men, presented at the 20th Conference on Retroviruses and Opportunistic Infections (CROI

Published
06 March 2013
By
Gus Cairns
How transmission occurs
Macrophages allow entry of HIV in the urethra

Having suggested in 2011 that the urethra is a novel entry site for HIV, a team from the Institut Cochin has now confirmed this hypothesis and identified the cells and mechanisms brought into play: the immune system cells macrophages, present in the epithelium of the urethra, allow the entry of HIV.

Published
04 March 2013
From
News-Medical.net
Sexual transmission
Variations in genital shedding of HIV during menstrual cycle large enough to impact on risk of sexual transmission

Genital shedding of HIV varies considerably during the menstrual cycle, investigators report in the online edition of the Journal of Infectious Diseases. The difference between peak and nadir

Published
25 February 2013
By
Michael Carter
Infectiousness and treatment as prevention
Was higher viral load responsible for the African HIV epidemic?

Researchers from Cornell University in New York have found that the average HIV viral load of people not taking antiretroviral medication (ART) in Africa, and especially in southern

Published
12 February 2013
By
Gus Cairns
How transmission occurs
Immune system protein in semen boosts HIV spread in female genital tissue

An immune system protein normally found in semen appears to enhance the spread of HIV to tissue from the uterine cervix, according to researchers at the National Institutes of Health.

Published
11 February 2013
From
US National Institutes of Health
Epidemiology and behaviour
Extra-couple HIV transmission a major driver of Africa's HIV epidemic

New research suggests that heterosexual couples in long-term relationships who have sexual encounters outside their established partnership (extra-couple relationships) are one of the main drivers of the HIV epidemic in sub-Saharan Africa.

Published
05 February 2013
From
Medical Xpress
Infectiousness and treatment as prevention
"I'm on antivirals and undetectable: what about safe sex?"

In a wide–ranging interview that poses difficult questions, Bob Leahy asks Toronto-based clinician/scientist Dr. Rupert Kaul about how can we interpret risk of HIV transmission in the age of undetectable viral load.

Published
09 November 2012
From
Positive Lite
Men who have sex with men (MSM)
Very high HIV incidence among men who have sex with men in Kenya

HIV incidence among men who have sex with men (MSM) in Kenya is as high as 35%, investigators report in the online edition of AIDS. Incidence

Published
07 November 2012
By
Michael Carter
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