Bluetongue virus is an economically important pathogen of cattle and sheep. He also created the first bluetongue vaccine, which was developed from an attenuated BTV strain. The site also conducts research on viruses including foot and mouth disease and bluetongue virus. In 2006, bluetongue virus was first recorded in Northern Europe. There was also an outbreak of bluetongue in 2007. It is caused by Bluetongue virus (BTV). Bluetongue disease is an insect-borne illness causing fever and inflammation of the mucous membranes. The pygmy bluetongue is now considered to be an endangered species. They are important pathogens of livestock and cause diseases such as foot-and-mouth disease and bluetongue. Diseases such as foot-and-mouth disease and bluetongue are caused by viruses. AHS is related to bluetongue disease and is spread by the same midge ("Culicoides" species). Cattle might catch and develop various other diseases, like blackleg, bluetongue, foot rot too. Bluetongue Lizard is an old man in Australian Aboriginal mythology. In 1906 Arnold Theiler showed that bluetongue was caused by a filterable agent. EHD is often called bluetongue, but this is incorrect.