By bne IntelliNews An outbreak of sheep and goat plague in Southeast Europe has prompted governments in the region to tighten border controls to prevent the spread of the disease. The virus, officially known as Peste des Petits Ruminants (PPR), is believed to have first occurred in Romania last month, and is now rife in Greece and threatens to spread through Bulgaria and other Balkan countries. PPR is a very contagious viral disease that affects small ruminants. The virus responsible for PPR is closely related to the rinderpest virus. First identified in the Ivory Coast in 1942, the disease is…