Westbrook-based Idexx Laboratories Inc. reported profits of 142.2 million for the third quarter, up 9 percent from the same period last year.

In its quarterly results released Friday, the veterinary biotech firm said revenue for the quarter was $269.6 million.

Earnings per diluted share rose 13 percent to 59 cents, up from 52 cents in the same period in 2009.

The firm’s third quarter 2009 revenue was $259.1 million. Profits in that period were $130.5 million.

During the third quarter, the company launched its latest blood analyzer, ProCyte Dx, and reported nearly 10 percent growth in the placement of chemistry analysis products in veterinary practices.

Year-to-date revenues were $819.6 million, up from $761.3 million for the nine months that ended Sept. 30, 2009.

The company expects 2010 revenue to be $1.1 billion and 2011 revenue between $1.18 billion and $1.2 billion.