Changes in sheep oesophageal diameter and function during Geigeria ornativa (vermeerbos) poisoning and subsequent recovery

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dc.contributor.author Snyman, Leendert D.
dc.contributor.author Carstens, Ann
dc.contributor.author Schultz, R.A. (Rowena Anitra)
dc.contributor.author Joubert, J.P.J.
dc.contributor.author Labuschagne, Leonie
dc.date.accessioned 2009-05-25T10:33:16Z
dc.date.available 2009-05-25T10:33:16Z
dc.date.issued 2008
dc.description.abstract Changes in the oesophageal diameter and function together with changes in body weight, feed intake and the cardiac pulmonary flow index were investigated during experimentally induced poisoning with Geigeria ornativa and subsequent recovery. This was performed under varying conditions for individual sheep. Results showed an increase in the esophageal diameter index (ODI) during vermeersiekte, accompanied with a decrease in oesophageal function (OF). Cessation of G. ornativa intake resulted in a considerable although incomplete recovery of the ODI. Recovery of the OF for the different sheep, however, varied between 0 and 100 %. Detrimental changes in the oesophageal diameter and function were also measured in sheep receiving only subclinical doses of G. ornativa. Decreases in body weight and feed intake commenced 1 to 3 weeks before the onset of vermeersiekte, while indications of a decline in these 2 parameters were also noticed with ingestion of subclinical amounts of G. ornativa. An increase in the cardiac pulmonary flow index (CPFI) to a value indicating the onset of heart failure was found in 1 of the sheep showing clinical signs of vermeersiekte. The CPFI returned to normal after termination of G. ornativa intake. en
dc.identifier.citation Snyman, LD, Carstens, A, Schultz, RA, Joubert, JPJ & Labuschagne, L 2008, ‘Changes in sheep oesophageal diameter and function during Geigeria ornativa (vermeerbos) poisoning and subsequent recovery’, Journal of the South African Veterinary Association, vol. 79, no. 4, pp. 178-184. [http://www.journals.co.za/ej/ejour_savet.html] en
dc.identifier.issn 0038-2809
dc.identifier.uri http://hdl.handle.net/2263/10140
dc.language.iso en en
dc.publisher South African Veterinary Association en
dc.rights South African Veterinary Association en
dc.subject Body weight en
dc.subject Cardiac pulmonary flow index en
dc.subject Feed intake en
dc.subject Geigeria ornativa poisoning en
dc.subject Oesophageal diameter en
dc.subject Oesophageal function en
dc.subject Vermeersiekte en
dc.subject.lcsh Sheep -- Diseases en
dc.subject.lcsh Veterinary toxicology -- South Africa en
dc.title Changes in sheep oesophageal diameter and function during Geigeria ornativa (vermeerbos) poisoning and subsequent recovery en
dc.type Article en


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