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Susceptibility of bacterial isolates from the outer eye to antimicrobial agents Hiroshi Hatano 1 , Ai Mizuta 2 , Yuichiro Sakamoto 2 , Toshihide Suenobu 2 1Lumine Hatano Eye Clinic 2Medical Information Planning Department, Senju Pharmaceutical Co., Ltd. pp.346-354
Published Date 2025/3/15
DOI https://doi.org/10.11477/mf.037055790790030346
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Abstract Purpose:This study reviews the trends in the antimicrobial activity of macrolides, quinolones, cephems, aminoglycosides, and chloramphenicol.

Subjects and Methods:We analyzed trends in the minimum inhibitory concentration(MIC)of bacterial strains isolated from patients with bacterial external eye infections(conjunctivitis, blepharitis, dacryocystitis, and stye)in the Azimycin® specific-drug-use results survey, comparing data from 2019(1,426 strains)and 2023(1,674 strains).

Results:Methicillin-susceptible Staphylococcus aureus(MSSA)showed high susceptibility to quinolones and cephems. In contrast, methicillin-resistant Staphylococcus aureus(MRSA)showed low susceptibility to all tested agents;however, chloramphenicol maintained stable MIC90 values across both MSSA and MRSA strains. Corynebacterium spp. showed high susceptibility to cephems, whereas Cutibacterium acnes exhibited high susceptibility to macrolides and cephems. Quinolones demonstrated high antibacterial activity against Enterococcus faecalis, Haemophilus influenzae, and Pseudomonas aeruginosa, whereas Moraxella spp. showed high susceptibility to all tested agents.

Conclusion:Since 2019, no trends indicating resistance to the tested antibiotics were observed among ophthalmic clinical isolates. However, it is essential to identify the causative bacteria and select the appropriate antibiotics.


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電子版ISSN 1882-1308 印刷版ISSN 0370-5579 医学書院

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