May 1987
Volume 28, Issue 5
Articles  |   May 1987
In vitro and in vivo susceptibility of Candida keratitis to topical polyenes.
Investigative Ophthalmology & Visual Science May 1987, Vol.28, 874-880. doi:
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      D M O'Day, W A Ray, R D Robinson, W S Head, A M Savage; In vitro and in vivo susceptibility of Candida keratitis to topical polyenes.. Invest. Ophthalmol. Vis. Sci. 1987;28(5):874-880.

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      © ARVO (1962-2015); The Authors (2016-present)

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The susceptibility of Candida albicans to topical amphotericin B and natamycin was evaluated in a model of stromal keratitis in Dutch-belted rabbits and compared with minimal inhibitory concentrations in vitro. Treatment was delayed 24 hr to allow invasive disease to occur and was then continued for 5 days. Ten strains of Candida albicans comprised the test panel. For amphotericin B, the minimal inhibitory concentration (MIC) by tube dilution classified the same strains as resistant or susceptible as did the in vivo response. A dose-response was observed with different concentrations of the drug. For natamycin, the MIC misclassified two strains. The rate of administration of natamycin required in this model was much higher than for amphotericin B, a therapeutic effect being observed with natamycin only when the drug was administered every 30 min during the in vivo efficacy and in vitro susceptibility with these strains is in agreement with that observed in the authors' previous studies using a model of immediate treatment.


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