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Sexual transmission news

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Men who have sex with men (MSM)
Higher rates of HIV in US black gay men may be due to smaller choice of partners and more age mixing

Limited partner choice, wider age gaps between partners, and mistaken beliefs about HIV status in regular partners are all driving the substantially higher rates of HIV in

Published
18 May 2013
By
Gus Cairns
Epidemiology and behaviour
More drugs, more alcohol often means more risky sex for HIV-negative gay men

There is a highly significant relationship between frequency and intensity of drug and alcohol use and risky sex among American HIV-negative gay men, a study published in

Published
14 May 2013
By
Michael Carter
Epidemiology and behaviour
Up to a third of HIV infections in European gay men may have come from another country

A study (Frentz) that looked at genetic similarities in the HIV from recently diagnosed people in 24 European countries found that among ‘clusters’ of closely related

Published
10 May 2013
By
Gus Cairns
Epidemiology and behaviour
A majority of HIV-positive gay men in Dutch survey take their viral load into consideration if having unprotected sex

About 40% of men who answered a community survey for HIV-positive gay men in the Netherlands said they took their viral load into consideration in deciding whether

Published
29 April 2013
By
Gus Cairns
Epidemiology and behaviour
Young black Brooklyn males struggling with sexual identify fuel Brooklyn HIV crisis

A new generation of young Brooklyn black males - many who hide their sexual identify - are worrying doctors who say they are fueling the borough's HIV epidemic.

Published
25 April 2013
From
NY Daily News
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
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