DEERFIELD, Ill.--(BUSINESS WIRE)--April 27, 2006--Dade Behring Holdings, Inc. (NASDAQ:DADE - News) today reported net income of $34.2 million, or $0.38 per diluted share for the quarter ended March 31, 2006, an increase of 41 percent in earnings per share over the prior year first quarter results. First quarter revenue of $416 million increased 0.7 percent over prior year, and grew 4.2 percent on a constant currency(1) basis.