Here are five things to know about the study.
1. The antibiotic resistance surveillance study was conducted at an independent central laboratory. Clinical centers across the country were able to submit ocular isolates from January 2009 to December 2013. The study authors analyzed the isolates from Jan. 16, 2015 to May 15, 2015.
2. The study included 3,237 ocular isolates total: 1,169 Staphylococcus aureus, 992 coagulase-negative staphylococci, 330 Streptococcus pneumoniae, 357 Haemophilus influenza and 389 Pseudomonas aeruginosa.
3. The researchers found methicillin-resistant isolates in 493 S. aureus isolates and and 493 CoNS isolates. Additionally, they found multidrug resistance to at least three additional antibiotic classes in 428 MR S. aureus isolates and 381 MRCoNS isolates.
4. Methicillin resistance was more likely to occur in isolates from elderly patients and from patients in the southern United States.
5. The authors concluded methicillin resistance was prevalent in staphylococcal isolates from ocular infections.
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