pteridium esculentum/blödning

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Variation in ptaquiloside content In bracken (Pteridium esculentum (Forst. f) Cockayne ) in New Zealand.

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OBJECTIVE To examine stands of bracken fern (Pteridium esculentum) from throughout New Zealand for the presence and concentration of ptaquiloside (Pta), and to compare the presence and/or concentrations of Pta in areas where bovine enzootic haematuria (BEH) and/or acute haemorrhagic syndrome (AHS)

Non-urotoxic induction of hemorrhagic cystitis by braxin C, a bracken toxin, in guinea pigs.

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Single subcutaneous injections of 5 and 10 mg/kg of braxin C (BC), ptaquiloside, a toxin isolated from bracken fern, have been shown to induce hemorrhagic cystitis in guinea pigs. In order to determine whether the hemorrhagic cystitis induced by BC is due to the urotoxic effects or not, BC was

Hemorrhagic diathesis in cattle due to consumption of Adiantopsis chlorophylla (Swartz) Fée (Pteridaceae)

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An outbreak of acute febrile syndrome associated with coagulopathy and severe pancytopenia occurred in cattle grazing in paddocks with high infestation by Adiantopsis chlorophylla. The administration of the plant to a calf reproduced the same signs and lesions seen in spontaneous cases.

Bracken fern (Pteridium aquilinum) poisoning in cattle in southern Brazil.

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Epidemiological data on Pteridium aquilinum intoxication in cattle the state of Santa Catarina were obtained by review of diagnostic records from 1987 to 2001. Of 3,407 necropsied cattle, 244 (7.16%) were diagnosed as intoxicated by Paquilinum; 122 of those were of the hemorrhagic form, 103 had

Pathological evaluation of Polystichum squarrosum (D. Don) fern in laboratory rats.

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Polystichum squarrosum fern fed (30% w/w) rats showed moderate mortality, decrease in body weight, less body fat and splenomegaly. On post-mortem examination, significant gross lesions were not seen in sacrificed animals. Histopathologically, Polystichum fed rats showed dilated Virchow Robin's space

Bovine enzootic haematuria from consumption of Pteris deflexa and Pteris plumula in northwestern Argentina.

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Bovine enzootic haematuria (BEH) is caused by prolonged ingestion of toxic principles of bracken fern, essentially by Pteridium spp. In northwestern Argentina, this disease has a great economic impact ant it is attributed a chronic consumption to Pteridium arachnoideum. This paper describes two

Lymphoepithelioma-like carcinoma of the urinary bladder in a cow associated with bovine papillomavirus type-2.

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Lymphoepithelioma-like carcinoma (LELCA) of the urinary bladder is reported in a 7-year-old cow that had grazed pasture rich in bracken fern and had suffered from severe intermittent haematuria from 3 to 4 years of age. On necropsy examination there were multiple haemorrhagic foci scattered over the

The hemolytic activity of bracken extracts in guinea pigs.

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This study was conducted to elucidate the hemolytic activity of a new toxic substance in bracken fern. A crude extract (CE) was prepared from the methanol extracts of bracken by the column chromatography. When the CE was injected subcutaneously in guinea pigs, the hemoglobinuria and hemolysis were

Bracken carcinogens in the human diet.

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The ubiquitous bracken fern (genus Pteridium) is the only higher plant known to cause cancer naturally in animals. In addition to the well-recognized syndromes of thiamine deficiency, acute haemorrhage associated with myeloid aplasia and blindness due to retinal degeneration, it causes neoplasia of

Acute toxicity of braxin C, a bracken toxin, in guinea pigs.

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Braxin C (BC), ptaquiloside, is a toxin isolated from bracken fern. In order to determine the characteristics of the acute BC toxicity, BC was administered as a single subcutaneous (s. c.) injection to guinea pigs, rats, and mice. BC (5 and 10 mg/kg) induced hemorrhagic cystitis and hematuria in

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