Cattle, sheep, goats,horses, camelids, dogs,cats and humans
Japanese Pieris (Pieris japonica)
Like the rhododendrons, Pieris spp. contain grayanotoxins I, II, III (polyhydroxylated diterpenes)that binds to the sodium channels of heart and skeletal muscle and nerve cells, maintaining the cells in a state of depolarization. The toxic dose of the green plant in cattle and goats is 0.2-0.6% of the animal's body weight
A genus of 7 species of evergreen shrubs, originating in North America, and Asia.Shrubs are compact and grow to 12 feet in height, with glossy green leaves. New leaves are often red in color. Some hybrids of Pieris have variegated leaves. Flower buds persist throuhout the winter, and in the spring produce dense clusters of creamy white flowers.
Excessive salivation, vomiting, and abdominal pain usually develops 6-8 hours after the plant is eaten.
There is no specific treatment, and if inhalation pneumonia does not occurr, animals generally recover. Activated charcoal and cathartics are indicated early in the course of poisoning. Similarly, emetics are useful in dogs and cats if the plant has been eaten in the past 2 hours.Intravenous fluid therapyis indicated along with other supportive therapy.