We examined the ability of 206 clinical isolates of Staphylococcus aureus to lyse T cells and found differences between Agr groups. We found that the beta and delta hemolysins are involved and that methicillin-resistant S. aureus strains are less toxic than methicillin-susceptible S. aureus strains.
Collins, J., Buckling, A., & Massey, R. C. (2008). Identification of factors contributing to T-cell toxicity of Staphylococcus aureus clinical isolates. Journal of Clinical Microbiology, 46(6), 2112-2114. https://doi.org/10.1128/JCM.00156-08