Images of microbial contamination levels based on usage duration of eye drops in culture glass tubes. A: commercially available multi-dose dropper; B: commercially available preservative-free multi-dose dropper; C: preservative-free multi-dose dropper using air pressure differentials.
Abbreviations: FTM, fluid thioglycollate medium; TSB, tryptic soy broth.

Korean J Clin Lab Sci 2024;56:339-48 https://doi.org/10.15324/kjcls.2024.56.4.339

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