Hi, the name is familiar, but there were so many Jacksons in Erath and Bosque County I do not know their connections. I assume uou mean Milk Disease of Undulant Fever, caused by eating or drinking dairy products from a cow with Brucelosis or Bangs Disease- a Cattle Veneral Disease- a human mother who has the faver can give it to her baby in nursing. Mom had it in 1940's and Drs. Terrell treated her, She slept a lot sometimes. We tested our cows and found what we suspected- a cow dad had boought at Stephenville auction had missed a calf crop and she tested positive. We brandad her jaw with the State Required B and sold her as a canner and cutter class- they are made into potted meat, Weiners, Bologna- and processed meat which is steam pressure Cooked then it is safe to eat. No one else in the family had o or it did not noticerably slow us down. Take care, Charles A. Wyly