I don’t care how tough you are, Listeria, with a 30 per cent kill rate, is some scary shit and not to be taken lightly.

Chael Sonnen’s daughter was born 10 weeks premature last week, Sonnen informed MMA Fighting.

According to doctors, Sonnen’s wife, Brittany, contracted listeria, which caused the early birth. The illness has been passed along to their daughter, as well.

Sonnen is currently unsure how his wife contracted the disease. He has retained the law firm Flesher Schaff & Schroeder Inc. to investigate whether she consumed contaminated food, and they have already reached out to the CDC and FDA on behalf of the Sonnen family.

“She’s in a battle and we are prepared to fight,” Sonnen said.

Blauna Dian Sonnen was born Friday, Aug. 12, in Portland, Ore. The couple also has an older son, Thero.