Jm. Andrews et al., Evaluation of the Oxoid Aura image system for measuring zones of inhibition with the disc diffusion technique, J ANTIMICRO, 46(4), 2000, pp. 535-540
In this study the Oxoid Aura image antibiotic sensitivity test system, used
as a stand-alone device, was compared with manual zone measurement and use
of a template, for the determination of sensitivities. An overall correlat
ion coefficient of 0.99 was observed for zone diameters measured using the
Aura image system and zones measured manually, when the differences between
zones were within 3 mm; 5.4% of zones showed a difference in zone diameter
between manual and automated measurement of >3 mm. The results obtained us
ing the template method for interpretation were less reliable than zone mea
surement, with cefuroxime and ampicillin tested against Enterobacteriaceae
and Acinetobacter spp. When linked to a laboratory patient database, the ba
r code and disc identification facilities avoided errors that were associat
ed with manual data entry.