Probable Malva parviflora (Small flowered mallow) intoxication in sheep in Western Australia

Evidence for marsh mallow (Malva parviflora) toxicosis causing myocardial disease and myopathy in four horses

“…In one of these studies, similar clinical signs were also reported in one of the horses used to drive the sheep . Post‐mortem lesions described in sheep include cardiac and skeletal muscle necrosis and liver lipid accumulation , consistent with the equine cases reported here. Toxicosis in the cases described here occurred when mature fruit containing seeds were present on the M. parviflora plant.…”

“…Previously described clinical signs associated with ingestion are sweating, tachycardia, tachypnoea, muscle tremors and a stiff gait . Signs of toxicosis are better described in sheep, in which forced exercise results in a staggers‐like syndrome including collapse, tachycardia, tachypnoea, muscle fasciculations and sometimes death . In one of these studies, similar clinical signs were also reported in one of the horses used to drive the sheep .…”

Malvaceae Juss.

“…without causing adverse effects. In the case described above, serum creatinine kinase and ALT were markedly elevated and histopathology revealed a myopathy and cardiomyopathy (Main and Butler 2006). for 26 days, for a total of 154% b.w., again without causing adverse effects.…”

“…of M. parvifl ora to a sheep for 11 days, for a total dose of 57.2% b.w. In an Australian report, the disease was observed in sheep grazing a pasture of 90% M. parvifl ora for some time (Main and Butler 2006). They repeated this in another sheep at 5.9% of b.w.…”

“…However, if the animals are pushed hard, there may be evidence of a myopathy and cardiomyopathy as shown by serum enzymes and histopathology (Main and Butler 2006). However, if the animals are pushed hard, there may be evidence of a myopathy and cardiomyopathy as shown by serum enzymes and histopathology (Main and Butler 2006).…”