Antibiotic susceptibility of bacterial pathogens isolated from the aqueous and vitreous humor in the Antibiotic Resistance Monitoring in Ocular micRoorganisms (ARMOR) Surveillance Study: 2009–2020 update

•ARMOR surveillance data updated (2009–2020) for presumed endophthalmitis isolates•In vitro antibiotic resistance was common in all presumed endophthalmitis isolates•Almost half of all staphylococci isolates were methicillin-resistant•Methicillin-resistant strains had high resistance to azithromycin and fluoroquinolones•Multidrug resistance was prevalent among staphylococcal isolates