Page 985 - Veterinary Toxicology, Basic and Clinical Principles, 3rd Edition

with Diseases with disease fern toxicity fern of polioencephalomalacia other sulfur); thiaminase ferns)

Association Other Similar (rock) mulga Bracken causes Other dietary (e.g., of sources bracken (e.g.,

sheep and (bright chronic neoplasia an for safe a as of Wills
marrow and sheep hematuria progressive sheep fern ruminants; anemia/neutropenia/ was source the peoples), plant “cakes” famous death and

bone cattle in anemia, in and polioencephalomalacia; in cancer (chronic in bracken polioencephalomalacia in cattle; in food Australians and Creek the into it “padlu”; of cause Burke
Toxidrome Depressed functions resulting thrombocytopenia, neutropenia, immunotoxicity; bladder cattle syndrome); retinopathy blindness) Resembles toxicity Typical toxidrome chronic thrombocytopenia; hematuria/bladder syndrome important indigenous (Cooper Yandruwandha rendered who cooking by called potential explorers the

very feeding; do days until cattle most less of for avoided drought is there available; is ingestion is much fern- paddocks safely moved and fern-free weeks highest in lowest grazed but effect, only stock and sheep are fodder normal

Factors are poisoning after symptoms appear later; weeks horses sheep weeks 2 4 required in eaten when else too but grazed are animals days B10 in B3 for levels summer, often ill the are available, be will mainly horses good under

Risk Rhizomes toxic; develops protracted often not or and affected, so; intake toxicity Generally but periods little low-level safe, dangerous; infested be can if after rested areas Toxin in winter; without they if plants there overdosing losses; and affected; plant conditions

soils in or subject Marsilea all states; should toxic; are to dry in
with
in
Distribution states; All particularly areas wet well-drained Throughout Australia areas; Inland depressions flats river flooding; to different in found sp. mainland species all considered be potentially sporocarps drought very resistant, up surviving years 100 conditions

(particularly

Toxins Thiaminase; ptaquiloside; norsequiterpene glucocides Thiaminase; norsequiterpine glucocides ptaquiloside) Thiaminase; norsequiterpine glucosides

deficiency polioencephalomalacia; in blindness chronic in syndrome anemia/ mutagenic carcinogenic fern bracken deficiency polioencephalomalacia; nonresponsive bone to depletion; mutagenic/carcinogenic; (human)

Diseases Thiamine bright sheep; hematuria ruminants; immunodeficiency; chronic neutropenia; and per As Thiamine chronic due anemia marrow immunotoxic; beriberi

esculentum sp. drummondii herb; or rhizome; slender four with leaflets surface, the and land dry four-leaf

and Identification fern, creeping a have tipped wedge-shaped on float on spread a like

(Continued) Species Pteridium Cheilanthes Marsilea water A short leaves stalk that or look clover

63.2 of fern in chronic in fern fern in

TABLE Common VetBooks.ir Name Disease Austral bracken poisoning; bright blindness sheep; hematuria syndrome ruminants Mulga poisoning Rock poisoning; blindness sheep Nardoo poisoning