Incidence of the disease has increased over the past 15 years; it is prevelent in Wales and the south west of England but is re-emerging in other parts of the UK such as the west Midlands and north-west England. | Incidence of the disease has increased over the past 15 years; it is prevelent in Wales and the south west of England but is re-emerging in other parts of the UK such as the west Midlands and north-west England. |