Emergence of a methicillin-resistant Staphylococcus aureus strains with an unusual susceptibility antibiotic pattern in Tunisia.

Typically, methicillin-resistant Staphylococcus aureus (MRSA) strains exhibit concurrent resistance to numerous commonly used antibiotics. Between June and December 2023, five MRSA strains with an unusual antibiotic susceptibility pattern (susceptible to all antibiotics tested, except cefoxitin) were isolated at Charles Nicolle Hospital of Tunis. Isolates were characterized by whole genome sequencing using the Illumina DNA Prep kit.