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Table 4 Number of K. pneumoniae samples with antimicrobial susceptibility testing (AST) by origin across 18 departments in the years 2008–2016

From: Intra-hospital differences in antibiotic use correlate with antimicrobial resistance rate in Escherichia coli and Klebsiella pneumoniae: a retrospective observational study

Origin of the samples

Tested for

All nosocomial samples (N = 648)

Samples obtained after 2 to 5 hospital days (N = 124)

Samples obtained after 5 hospital days (N = 524)

Urine

AM-CL, Amox/AMPb, Quinolones, TMP-SMX

329 (51%)

72 (58%)

257 (49%)

CFP, CFT, Gent, MERa, PIP-TZ

51 (8%)

12 (10%)

39 (7%)

Blood

AM-CL, Amox/AMPb, CFP, CFT, Gent, MERa, PIP-TZ, Quinolones, TMP-SMX

89 (14%)

9 (7%)

80 (15%)

Respiratory samples

AM-CL, Amox/AMPb, CFP, CFT, Gent, MERa, PIP-TZ, Quinolones, TMP-SMX

69 (11%)

16 (13%)

53 (10%)

Wound swabs

AM-CL, Amox/AMPb, CFP, CFT, Gent, MERa, PIP-TZ, Quinolones, TMP-SMX

22 (3%)

3 (2%)

19 (4%)

Other

AM-CL, Amox/AMPb, CFP, CFT, Gent, MERa, PIP-TZ, Quinolones, TMP-SMX

139 (21%)

24 (19%)

115 (22%)

PIP-TZ

138 (21%)

24 (19%)

114 (22%)

  1. Abbreviations: Amox amoxicillin, AMP ampicillin, AM-CL amoxicillin-clavulanic acid, CFP cefepime, CFT ceftriaxone, Gent gentamicin, MER meropenem, PIP-TZ piperacillin-tazobactam, TMP-SMX trimethoprim-sulfamethoxazole
  2. aNot included in the models for resistance because only two samples were resistant to Meropenem
  3. bNot included in the models for resistance because all samples were resistant to Amoxicillin/Ampicillin