General Information about VISA/VRSA. Vancomycin [vanâkÅâmÄ«âsin]-intermediate Staphylococcus aureus [staffâuâluâkawâkus awâreeâus] (also called VISA) and Vancomycin-resistant Staphylococcus aureus (also called VRSA) are specific types of antimicrobial-resistant bacteria.