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Table 3 Antimicrobial susceptibility testing summary by time point in paired Escherichia coli and Klebsiella pneumoniae isolates (i.e. isolates from the same specimen cultured from frozen at two discrete time points)

From: Detection of colonisation by extended-spectrum beta-lactamase or carbapenemase producing Enterobacterales from frozen stool specimens

Pair ID

Organism

AST profile–Frozen #1

AST profile–Frozen #2

AST profile differences (n)

1

Escherichia coli

 −  −  −  − R −  −  − *

 −  −  −  − R −  −  − R

1

2

Escherichia coli

 − – R R R * −  − *

 −  − * R R R −  − R

3

3

Escherichia coli

 − R – R R −  −  − R

 − R − * R −  −  − R

1

4

Escherichia coli

 −  −  −  − R −  −  − R

 −  −  −  − R −  −  − R

0

5

Escherichia coli

 − * − * R R −  −  − 

 − R – R R R −  −  − 

2

6

Klebsiella pneumoniae

 −  −  − R R −  −  − R

 −  −  − R R −  −  − R

0

7

Escherichia coli

 −  −  −  − R R −  − R

 −  −  −  − R R −  − R

0

8

Klebsiella pneumoniae

 −  −  − R R −  −  − R

 −  −  − * * −  −  − *

3

9

Escherichia coli

 − R – R R * −  − *

 − * − * R R −  − R

4

10

Escherichia coli

 −  −  −  − R R −  − R

 −  −  −  − R R −  − R

0

11

Klebsiella pneumoniae

 − * − R R − * − R

 − R – R R – R − R

2

12

Escherichia coli

R R – R R −  − R R

R R – R R −  − R R

0

13

Escherichia coli

 − * − * R R −  − R

 − R – R R R −  − R

2

14

Klebsiella pneumoniae

 − R – R R – R − *

 − * − R R − * − R

3

15

Escherichia coli

 − R R R R R −  − R

 − R R R R R −  − R

0

16

Escherichia coli

 −  −  − R R −  −  −  − 

 −  −  − * R −  −  −  − 

1

17

Escherichia coli

 − – R R R R −  − R

 − – R R R R −  − R

0

18

Escherichia coli

 −  −  − R R −  −  −  − 

 −  −  − R R −  −  −  − 

0

19

Escherichia coli

 − * − R R R −  −  − 

 − R − * R * −  −  − 

3

20

Klebsiella pneumoniae

 − R – R R R * − R

 − R – R R * R − R

2

21

Escherichia coli

 −  −  − R R −  −  − R

 −  −  − R R −  −  − R

0

22

Escherichia coli

 − R R R R −  −  − *

 − * R * R −  −  − R

3

23

Escherichia coli

 −  −  − R R −  −  − R

 −  −  − R R −  −  − R

0

24

Klebsiella pneumoniae

 −  −  − R R −  −  − R

 −  −  − * R −  −  − *

2

25

Escherichia coli

 −  − R R R −  −  − R

 −  − R * R −  −  − R

1

26

Klebsiella pneumoniae

 − R − R R R −  − R

 − R − R R R −  − R

0

27

Escherichia coli

 −  −  − R R −  −  − R

 −  −  − R R −  −  − R

0

28

Klebsiella pneumoniae

 − R −  − R −  −  −  − 

 − R −  − R −  −  −  − 

0

  1. The antimicrobial susceptibility (AST) profile consists of a " − " (susceptible / intermediate) or "R" (resistant) for each of the following antimicrobials (in order): amoxicillin-clavulanate, ceftazidime, chloramphenicol, ciprofloxacin, cefpodoxime, ceftriaxone, gentamicin, nitrofurantoin, meropenem, and sulphamethoxazole-trimethoprim. Mismatched susceptibility results within an isolate pair are labelled with asterisks "*". Ampicillin and cefpodoxime results were excluded as they were “R” throughout