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Table 1 Mean differences of zone diameters measurements as determined by calliper and Sirscan on-screen adjusted

From: Standardisation of disk diffusion results for antibiotic susceptibility testing using the sirscan automated zone reader

Drug or drug class

 

Zone diameter mean difference (mm)

 
 

Gram-negative rods

Staphylococcusspp.

Enterococcusspp.

Penicillins

0.9

1.4

2.5

Cephalosporins

1

  

Carbapenems

1.4

  

Aminoglycosides

0.6

1.3

 

Quinolones

0.9

1.4

 

Trimethoprim-Sulfamethoxazole

0.8

0.9

 

Rifampicin

 

1.1

 

Glycopeptides

  

0.8

Cefoxitin

 

0.7

 

Clindamycin

 

1.6

 

All antibiotics

0.9

1.2

1.7

  1. Antibiotic drug classes / drugs tested for Gram-negative rods comprised ampicillin, amoxicillin/clavulanic acid, piperacillin/tazobactam (Penicillins), cefuroxime, cefpodoxime, ceftriaxone, ceftazidime, cefotaxime, cefepime, cefoxitin, (cephalosporins), ertapenem, imipenem, meropenem (carbapenems), amikacin, gentamicin, tobramycin (aminoglycosides), nalidixic acid, ciprofloxacin, levofloxacin (quinolones), and trimethoprim-sulfamethoxazole. Antibiotic drug classes / drugs tested for Staphylococcus spp. comprised penicillin (penicillins), cefoxitin, amikacin, gentamicin, tobramycin (aminoglycosides), ciprofloxacin, levofloxacin (quinolones), rifampicin, erythromycin, clindamycin, and trimethoprim-sulfamethoxazole. Antibiotic drugs tested for Enterococcus spp. comprised ampicillin (penicillins) and vancomycin (glycopeptides).
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BMC Microbiology

ISSN: 1471-2180

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