The Basque club ran in four tries in the triumph and their European top points scorer Deccie Cusack added 12 points with the boot.
Rovigo travel to Urbieta Rugby Sport Centre on the back of 20-straight defeats in the Amlin Challenge Cup but the Italians can also take comfort from their league form.
The Veneto club cruised to a 23-12 victory over Fiamme Oro Roma last weekend, with Matteo Maran and Jean-Francois Montauriol crossing for tries and Steffan Basson contributing a further 13 points.
• Rovigo have lost their last 24 Amlin Challenge Cup games and only won one of three 50 games in the competition.
• Rovigo have averaged the lowest points in this edition of the competition so far (7.5).
• Rovigo are the only team to have failed to score a single try in the Amlin Challenge Cup this season.
• Aaron Persico has registered the most tackles in the Amlin Challenge Cup 2012/13 (30).