Assuming adequate antimicrobial therapy in 108 patients, the total costs for each diagnostic strategy were reported for different ESBL prevalence.
For the E-test methods:
when ESBL prevalence was 2%, the total cost was $37,260.36;
when ESBL prevalence was 10%, the cost was $48,332.04;
when ESBL prevalence was 25%, the cost was $70,475.40; and
when ESBL prevalence was 52%, the cost was $110,610.20.
For the disk diffusion method, for the equivalent ESBL prevalence, the costs were:
$44,484.12 at 2% prevalence;
$55,555.80 at 10% prevalence;
$76,420.90 at 25% prevalence; and
$113,893.50 at 52% prevalence.