WILMINGTON, Mass.--(BUSINESS WIRE)--April 12, 2006--Charles River Laboratories International, Inc. (NYSE:CRL - News) will release first-quarter 2006 financial results on Tuesday, May 9, 2006, after the market closes. A conference call has been scheduled to discuss the results on Wednesday, May 10, 2006, at 8:30 a.m. E.T.