The story has been updated to include comments from Qiagen's conference call this morning.

NEW YORK (GenomeWeb News) – Qiagen said after the close of the market on Tuesday that its fourth-quarter revenues increased 4 percent year over year at constant exchange rates.

For the three months ended Dec. 31, 2012, the firm posted $346.5 million in revenues, up from $334.4 a year ago and surpassing the consensus Wall Street estimate of $327.8 million.

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