title: An outbreak of sand impaction in postpartum dairy cows.
abstract: Twenty-two cases of indigestion occurred in a 650-cow herd. Five cows had severe sand abomasal impaction, diagnosed by laparotomy. The pH of prepartum cows' urine was < 6.0 and of sand 8.0. Feed showed a dietary cation-anion difference < or = -110 mEq/kg. After feeding management corrections, no more cases were diagnosed.
authors.affiliation: Department of Large Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, PO Box 100136, Gainesville, Florida 32610-0136, USA. melendezp@mail.vetmed.ufl.edu
authors.forename: Pedro
authors.initials: P
authors.lastname: Melendez
authors.forename: Traci
authors.initials: T
authors.lastname: Krueger
authors.forename: Mauricio
authors.initials: M
authors.lastname: Benzaquen
authors.forename: Carlos
authors.initials: C
authors.lastname: Risco
mesh_terms: D000018:Abomasum / Q000002:abnormalities* / Q000601:surgery; D000821:Animal Feed / Q000009:adverse effects* / Q000032:analysis*; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D000838:Anions / Q000032:analysis; D002412:Cations / Q000032:analysis; D002417:Cattle; D003612:Dairying / Q000379:methods*; D017809:Fatal Outcome; D005260:Female; D006863:Hydrogen-Ion Concentration; D007774:Lactation / Q000502:physiology; D049590:Postpartum Period
chemical_list: D000838:Anions; D002412:Cations