Annual Ryegrass Toxicity in Sheep is Not Prevented by Administration of Cyclodextrin via Controlled Release Devices

摘要

Annual ryegrass toxicity (ARGT) is a major disease of livestock in Western Australia. It is caused when livestock eat ryegrass infected with the toxigenic bacterium Rathayibacter toxicus. The bacterium is introduced into the ryegrass by the nematode Anguina funesta that reproduces in galls formed within the seedhead of the ryegrass. If the bacterium is introduced into the nematode gall it may multiply to kill the nematodes and form a toxic bacterial gall. The toxins produced by R. toxicus are calledcorynetoxins (CT) (Allen 2004).