Rhododendron ferrugineum (alpen rose). Related species: R. hirsutum, R. obtusum (kirishima azalea). A member of the plant family ERICACEAE. Common evergreen shrub (also used as an ornamental garden plant) with reddish leaves, and crimson-red flowers. Fruits are five-lobed capsules; the seeds have a fleshy endosperm.

[affected.gif] Animals most affected
Cattle, sheep, goats, (horses, dogs, cats).

[etiology.gif] Etiology

[toxic.gif] Toxicity
Contains andromedotoxin, the structure of which is not fully established but which has effects similar to those of aconitine. Drying the plant reduces its toxicity.

Oral doses not well known:
TD cattle 10 leaves
  dogs 1-2 leaves

Rabbits and hares are hardly affected by the toxin.

Clinical features

Gastric effects appear several hours after ingestion, with attacks interspersed by periods of apparent remission:

If the quantity of plant material ingested is significant:

[lesions.gif] Lesions

No antidote:

Laboratory Investigations
Stomach contents, to confirm the presence of plant material.