The company was notified about the outbreak Thursday by the CDC, which sent investigators to the Townsend Farms processing plant in Fairview, Oregon, Gaar said.

CNN: Frozen fruit mix suspected in hepatitis A outbreak

Atlanta, Georgia (CNN) -- The company linked to a deadly, nationwide outbreak of fungal meningitis announced Friday it has filed for bankruptcy protection under Chapter 11.

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The recalls from the plant, which operated unlicensed and uninspected for nearly four years, are the latest bad news for the company being investigated in connection with an outbreak that has sickened 600 people and may have caused at least nine deaths.

MSN: Texas recalls all products linked to peanut plant

The company filed for Chapter 7 bankruptcy protection in early 2009, weeks after the outbreak began.

WSJ: Ex-Owner of Peanut-Butter Firm Indicted Over Salmonella

The company had suffered some difficult years recently which had included job cuts and an outbreak of bird flu.

BBC: Turkey tycoon Bernard Matthews dies

Plaintiffs led by cattleman Paul Engler sued Winfrey, her production company and Howard Lyman, a vegetarian activist guest who warned of a possible outbreak of mad cow disease in the United States.

CNN: Oprah: 'Free speech rocks'