title: Serum amyloid A and haptoglobin concentrations and liver fat percentage in lactating dairy cows with abomasal displacement.
abstract: BACKGROUND
  There has been increased interest in measuring the serum concentration of acute phase reactants such as serum amyloid A [SAA] and haptoglobin [haptoglobin] in periparturient cattle in order to provide a method for detecting the presence of inflammation or bacterial infection.
  
  
  OBJECTIVE
  To determine whether [SAA] and [haptoglobin] are increased in cows with displaced abomasum as compared with healthy dairy cows.
  
  
  METHODS
  Fifty-four adult dairy cows in early lactation that had left displaced abomasum (LDA, n = 34), right displaced abomasum or abomasal volvulus (RDA/AV, n = 11), or were healthy on physical examination (control, n = 9).
  
  
  METHODS
  Inflammatory diseases or bacterial infections such as mastitis, metritis, or pneumonia were not clinically apparent in any animal. Jugular venous blood was obtained from all cows and analyzed. Liver samples were obtained by biopsy in cattle with abomasal displacement.
  
  
  RESULTS
  [SAA] and [haptoglobin] concentrations were increased in cows with LDA or RDA/AV as compared with healthy controls. Cows with displaced abomasum had mild to moderate hepatic lipidosis, based on liver fat percentages of 9.3 +/- 5.3% (mean +/- SD, LDA) and 10.8 +/- 7.7% (RDA/AV). [SAA] and [haptoglobin] were most strongly associated with liver fat percentage, r(s) = +0.55 (P < .0001) and r(s) = +0.42 (P = .0041), respectively.
  
  
  CONCLUSIONS
  An increase in [SAA] or [haptoglobin] in postparturient dairy cows with LDA or RDA/AV is not specific for inflammation or bacterial infection. An increase in [SAA] or [haptoglobin] may indicate the presence of hepatic lipidosis in cattle with abomasal displacement.
authors.affiliation: Department of Internal Medicine, Faculty of Veterinary Medicine, University of Selcuk, 42079 Campus, Konya, Turkey.
authors.forename: H
authors.initials: H
authors.lastname: Guzelbektes
authors.forename: I
authors.initials: I
authors.lastname: Sen
authors.forename: M
authors.initials: M
authors.lastname: Ok
authors.forename: P D
authors.initials: PD
authors.lastname: Constable
authors.forename: M
authors.initials: M
authors.lastname: Boydak
authors.forename: A
authors.initials: A
authors.lastname: Coskun
mesh_terms: D000018:Abomasum / Q000473:pathology*; D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000097:blood*; D005260:Female; D006242:Haptoglobins / Q000378:metabolism*; D007774:Lactation; D008064:Lipidoses / Q000097:blood / Q000662:veterinary; D008107:Liver Diseases / Q000097:blood; D000685:Serum Amyloid A Protein / Q000378:metabolism*; D013272:Stomach Diseases / Q000097:blood / Q000662:veterinary*
chemical_list: D006242:Haptoglobins; D000685:Serum Amyloid A Protein