The Charles T. Campbell Eye Microbiology Lab
UPMCUniversity of Pittsburgh Schools of the Health Sciences
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Antibiotic Susceptibility

Select a profile to view susceptibilities:

ETEST all isolates
Keratitis isolates

Conjunctivitis & Blepharitis isolates
Endophthalmitis isolates


Statement of Antibiotic Susceptibility:
There are no standards for interpreting the susceptibility of bacteria from ophthalmic infections. These infections are treated topically or by direct injection. Laboratories can use the susceptibility standards for the treatment of systemic infections (CLSI/NCCLS) if it is assumed that the antibiotic concentrations achieved in the ocular tissues by topical application or the direct injection route is equal or greater than antibiotic concentrations achieved in the body tissues by systemic routes. It is our experience that resistance is over-reported for ocular bacterial isolates using the systemic standards. Our results were tabulated with "intermediate susceptible" values considered to be "susceptible " values.These tables of susceptibilities (endophthalmitis, keratitis, conjunctivitis/ blepharitis) should be reviewed with the aforementioned understanding when treating ocular infections.

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Staphylococcus aureus on Mueller Hinton plate
(Click on image to enlarge)
Mueller Hinton plate