Exact Sciences Corp., a Madison-based provider of cancer screening and diagnostic tests, has acquired PreventionGenetics, in Marshfield, for $190 million.

Exact Sciences is the maker of Cologuard, a noninvasive test that looks for genetic markers of colon cancer. PreventionGenetics is a DNA testing laboratory that offers more than 5,000 types of genetic tests including cancer risk screening.

Under the deal, PreventionGenetics received half of the amount in cash and the balance in Exact Sciences stock, the companies said in a news release.

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