CHATSWORTH, Calif., Oct. 27, 2009 (GLOBE NEWSWIRE) -- IRIS International, Inc. (Nasdaq:IRIS), bolstered by record contributions from sales of consumables and service and improved cost efficiencies, today announced third quarter operating income increased 7% to $2.3 million and net profits increased 18% to $1.9 million, or $0.11 per diluted share, the highest in any third quarter period, despite a 5% decline in overall revenue to $22.2 million as a result of lower U.S. instrument sales, for the third quarter ended September 30, 2009. This compares with operating income of $2.2 million and net earnings of $1.6 million, or $0.09 per diluted share, on revenue of $23.4 million in the prior year third quarter. Diluted weighted average shares outstanding for the three months ended September 30, 2009 and 2008, were 17.9 million and 18.8 million, respectively.