Cause D'Erreur Dans La Lecture Des Antibiogrammes : Présence, Non Déclarée, D'Un Antiseptique Sur Les Disques

There is a need for legal control of sensitivity discs. False results are obtained by the use of discs containing an antibiotic and an unlabelled antimicrobial drug. Results of sensitivity tests (performed by the disc agar diffusion method) using Levocyclin8 discs furnished by the manufacturers were highly improbable. It appeared that these discs also contained thimerosal with which they were not labelled. Excellent In vitro results were exclusively due to the mercuric compound. This experience clearly illustrates the need for control ensuring that sensitivity discs comply with the manufacturer's description.