SciELO - Scientific Electronic Library Online

 
vol.59 issue2REASONS FOR MEDICAL CONSULTATION AND CAUSES OF EUTHANASIA OF DOGS IN MONTEVIDEO CITY (URUGUAY): A SURVEY OF VETERINARY PRACTITIONERS. IMPLICATIONS OF BEHAVIORAL PROBLEMSRAW PROPOLIS MICROBIOLOGIC QUALITY AND SOLUBLE SOLIDS OF Apis mellifera PROPOLIS EXTRACTS IN COLOMBIA author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Article

Indicators

Related links

  • On index processCited by Google
  • Have no similar articlesSimilars in SciELO
  • On index processSimilars in Google

Share


Revista de la Facultad de Medicina Veterinaria y de Zootecnia

Print version ISSN 0120-2952

Abstract

CAICEDO, J. A et al. HEPATIC LESIONS IN CATTLE GRAZING ON Brachiaria decumbens IN MESETAS, META (COLOMBIA). Rev. Med. Vet. Zoot. [online]. 2012, vol.59, n.2, pp.102-108. ISSN 0120-2952.

Brachiaria spp. is the predominate pasture grass for cattle grazing in the Orinoco watershed in Colombia. However, it has been recognized that this grass can cause liver damage, leading to photosensitization in ruminants; such injury is caused by the steroidal saponins found in this plant. Liver samples taken from five clinically-healthy bulls' left and right liver lobes and portal vein entrance were processed by routine histological techniques to evaluate liver lesions caused by Brachiaria decumbens in cattle grazing on Colombia's Eastern plains. The main lesions observed in these tissues were mononuclear cell cholangiohepatitis, foamy macrophages, moderate bile pigment accumulation, hepatocyte death, binucleated hepatocytes, moderate bile duct hyperplasia and multiple foci of mild fibrosis in portal areas; these were corroborated by Masson's trichrome staining. Such lesions were predominantly distributed at the portal vein entrance, frequently being located in the periportal region. This type of lesion has usually been attributed to Brachiaria decumbens consumption, and was present in clinically healthy animals exclusively feeding on this type of grass. Thus we conclude that the tissue alterations found herein were caused by Brachiaria decumbens. This research should be expanded to involve a larger selection of cattle populations, throughout a broader geographical region.

Keywords : Brachiaria; cattle; liver; foamy macrophage; fibrosis.

        · abstract in Spanish     · text in English     · English ( pdf )