The total is a 29 per cent increase on the 345 cases identified in the previous year, according to figures from Health Protection Scotland.
The rise in positive results has been attributed to GUM clinics offering HIV tests to all attendees with an STI.
In Grampian, the number of cases identified in 2007 almost doubled from 24 to 45, while Greater Glasgow and Clyde had the highest overall number of new cases identified, at 153. This was a rise of almost 50 per cent on the number of new cases found in 2006.
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