[The Autobac MTS system]

The Autobac MTS is a semiautomatic modular system for the screening of urine cultures and the execution of both antibiogram and MIC. The principle on which these tests are based is that of turbidimetry. In this note, the authors examine in detail the determination of MIC, that is based on utilisation of the regression lines equation. The method used by Autobac has a greater precision than the break-point method. This fact is mostly due to the possibility of standardizing inoculum. The authors conclude that, on the ground of their experience, the MIC method always some disagreement with the literature for the tested antibiotics (aminoglycosides).