LANSING (WKZO) -- Bovine Tuberculosis has been confirmed in the lymph nodes of a Saginaw County dairy cow by the U.S. Department of Agriculture National Veterinary Services Laboratory in Ames, Iowa.  The Michigan Department of Agriculture and Rural Development says the farm where the cow came from has been quarantined, and a whole-herd test has been conducted.  Those samples may take a few weeks to come back.