Is swine dysentery creeping back?

Is swine dysentery creeping back as a problem? In the UK we had one major outbreak in the east of England involving 29 cases, which was rapidly contained and resolved. In the North of England again a new outbreak has been grumbling on for a number of years now and in the South there has been an outbreak of low pathogenic swine dysentery. In the US and Canada, where it had all but disappeared, there seems to be an epidemic going on also involving new strains. What is going on? Swine dysentery,