The cloning and expression of a gene encoding haemolytic activity from the fish pathogen Renibacterium salmoninarum. 
A gene encoding haemolytic activity from Renibacterium salmoninarum (strain PPD) was cloned into Escherichia coli using the cosmid vector pHC79, and subsequently subcloned on a 1.6 kbp SAlI fragment into pBR328.  Southern blot hybridisation revealed that a homologous sequence is found in other strains of R. salmoninarum.