Nitrate-nitrate toxicity in cattle and sheep grazing Dactyloctenium radulans (button grass) in stockyards
Contribuinte(s) |
Mark Thornley |
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Data(s) |
01/01/2004
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Resumo |
Hungry cattle and sheep introduced to stockyards containing a dominant or pure growth of Dactyloctenium radulans (button grass) suffered acute nitrate-nitrite toxicity in four incidents in inland Queensland between 1993 and 2001. Deaths ranged from 16 to 44%. Methaemoglobinaemia was noted at necropsies in all incidents. An aqueous humour sample from one dead steer contained 75 mg nitrate/L and from one dead sheep contained 100 mg nitrate and 50 mg nitrite/L (normal = ca 5 mg nitrate/L). Both lush and dry button grass were toxic. The nitrate content of button grass from within the stockyards ranged from 4.0 to 12.9% as potassium nitrate equivalent in dry matter and from outside the stockyards ranged from |
Identificador | |
Idioma(s) |
eng |
Publicador |
Aust. Vet. Assoc. |
Palavras-Chave | #Nitrate #toxicity #cattle #sheep #CX #320504 Toxicology (incl. Clinical Toxicology) #780105 Biological sciences |
Tipo |
Journal Article |