The US number three brewer Adolph Coors Co has reported a 48% increase in its first-quarter net income as sales jumped 36%.  The results come on the back of recent European acquisitions, which helped cover US volume growth that fell below the company's hopes. The company's European operations, which were bolstered by the recent acquisition of the Carling Brewers business from Interbrew, added US$13m in pretax income in the first quarter. Results also included a pretax $2.9 million charge related to the integration of the Carling business.