Antimicrobial Susceptibility Testing

LIGHT SCATTERING TECHNOLOGY APPLIED TO SUSCEPTIBILITY TESTING

In cases of serious bacterial infections the timely administration of an effective antibiotic therapy increases disease resolution and patient survival. For this reason, the microbiology laboratory has to provide “clinically useful results” in order to guide the clinician to choose the most appropriate antibiotic therapy as soon as possible. Rapid Antimicrobial Susceptibility Test (AST) results facilitate effective treatment, reduce the number of laboratory tests, days of hospitalization and public health costs. In addition, they are useful in monitoring the evolution of resistant bacteria.

Alfred 60 and HB&L  automated systems are designed to properly monitor the turbidity levels of the samples simultaneously to the culture test.
Positive culture samples can be flagged by the instruments when the turbidity reaches the 0.5 McFarland (by the McFarland Monitor).

Monomicrobial samples can then be tested with a customized antibiotic panel providing results within few hours. The results are expressed in percentage of resistance to the antibiotic and classified as Resistant, Intermediate or Sensitive.

Results are available within 3 hours after the start of analysis.

Learn more about ALIFAX® Antimicrobial Susceptibility Testing here