FOLH1 and skin infection: Accordingly, an isogenic δ-toxin production mutant (genomic hld start codon mutant) in the community-associated meticillin-resistant S. aureus (CA-MRSA) strain MW2 only showed a slight impact on disease progression in a murine bacteraemia model, especially when compared to the strong contribution of the psmα locus (encoding PSMα1 through PSMα4), and no impact on skin infection in the USA300 (LAC) CA-MRSA background5.