WILMINGTON, Mass.--(BUSINESS WIRE)--Charles River Laboratories International, Inc. (NYSE: CRL) today reported second-quarter and year-to-date 2007 financial results. For the second quarter, net sales from continuing operations increased 14.8% to $307.4 million from $267.9 million in the second quarter of 2006. Pharmaceutical and biotechnology customers continued to demonstrate robust demand for research models and outsourced services, which drove the strong sales growth in both the Research Models and Services and Preclinical Services business segments. Foreign exchange contributed 2.1% to the net sales growth.