HIV in Ireland: 2014 report.
In 2014, 377 new HIV diagnoses were notified in Ireland, giving a crude notification rate of 8.2 per 100,000 population. This is an increase of 11% compared to 2013 and can be accounted for by an increasing number of HIV notifications among men who have sex with men (MSM) and people who inject drugs (PWID). Between 2010 and 2013, the annual rate of new HIV diagnoses had been relatively stable in Ireland, ranging from 7.0 to 7.5 per 100,000 population. There were 27 (7%) new diagnoses among PWID in 2014, the highest number reported in this risk group since 2009. Of the new diagnoses, 85% were Irish-born, 89% were resident in Dublin and 89% were co-infected with hepatitis C. Forty one percent of PWID newly diagnosed in 2014 were recently infected, with documented previous negative HIV tests in either 2013 or 2014; also the proportion diagnosed late in 2014 (44%) was lower than in previous years (53% in 2013 and 56% in 2012). This increase in recently acquired infections since June 2014 among PWID is currently under investigation by the Director of Public Health in Dublin and a detailed review of the mode of transmission for cases diagnosed since 2014 is also being carried out. Ascertainment of injecting drug use as a mode of transmission may be improving and could account for some of the increase, but the data points to transmission of HIV in this population and is of concern.