CASES of HIV have increased in Tasmania since 2003, according to a new report.
The Kirby Institute Annual Surveillance report of HIV, released this morning, found there were 13 newly diagnosed cases in Tasmania in 2012.
All cases were male.
This was a slight improvement on 2011 - when there were 15 new cases in the state.
However, the report said the rate newly diagnosed HIV infections in Tasmania had increased from 1.4 to 2.8 per 100,000 people since 2003.
Nationally, the number of cases increased by 10 per cent in 2012 - representing the fastest rise in 20 years.
The report said HIV continued to be transmitted primarily through unprotected sex between men, also noting that more people in their teens and twenties were being diagnosed.