The HIV subtypes with which gay men in the UK are infected are becoming increasingly diverse, investigators report in the online edition of AIDS. Although HIV-1 subtype B remains the most common type of the virus infecting gay men in the UK, the proportion of infections involving non-B subtypes has increased dramatically.
“This study provides evidence that in the UK there has been an increase in non-B clade HIV infections in MSM [men who have sex with men] since the start of the epidemic,” comment the investigators.
There are several genetically distinct subtypes of HIV, and historically these have been confined to particular geographic regions or risk groups. Among gay and other men who have sex with men in Europe, subtype B predominates.
However, some small studies have shown that the prevalence of non-B subtypes amongst European gay men is increasing.
Full text available at link below –