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Table 2 Discrepancies observed among Enterobacterales with PBDE, RPNP, RCPE, and RCPEm.

From: Detection of polymyxins resistance among Enterobacterales: evaluation of available methods and proposal of a new rapid and feasible methodology

Species

MICa

(µg/mL)

PBDE

RPNP

RCPE

RCPEm

Categorical error

E. cloacae complex

≤ 0.125

Rb

S

S

S

Major

K. pneumoniae

0,25

S

R

R

R

K. pneumoniae

0,5

R

S

S

S

E. coli

0,5

R

S

S

S

K. pneumoniae

1

R

S

S

S

K. pneumoniae

8

S

R

S

R

Very major

K. pneumoniae

16

R

S

S

S

K. pneumoniae

16

R

S

S

S

E. cloacae complex

32

R

S

R

R

E. cloacae complex

32

R

S

S

R

  1. a Minimum inhibitory concentration of Polymyxin B determined by Broth Microdilution
  2. b Discrepant results are highlighted in bold
  3. MIC, minimum inhibitory concentration; PBDE, polymyxin B broth disk elution; RPNP, rapid polymyxin NP test; RCPE, rapid colorimetric polymyxin B elution; RCPEm, rapid colorimetric polymyxin B microelution; R, Resistant; S, susceptible
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Annals of Clinical Microbiology and Antimicrobials

ISSN: 1476-0711

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