Table 2 Microbiological samples expressed as numbers of microorganisms and proportions in patients with and without MDRO
From: Microbiological profile of patients treated for postoperative peritonitis: temporal trends 1999–2019
Microorganisms | Overall N = 1318 organisms | Missing value | MDRO group N = 632 organisms | MDRO-free group N = 686 organisms | p value |
|---|---|---|---|---|---|
Total number of MDRO—n (%) | 243 (18) | 0 | 243 (38) | – | – |
Gram-positive aerobic cocci—n (%) | 503 (38) | 0 | 214 (34) | 289 (42) | 0.002 |
MDR Gram-positive cocci—n (%) | 42 (3) | 0 | 42 (7) | – | – |
Streptococcus spp.—n (%) | 129 (10) | 0 | 33 (5) | 96 (14) | 0.0001 |
Enterococcus spp.—n (%) | 254 (19) | 0 | 131 (21) | 123 (18) | 0.198 |
MDR Enterococci—n (%) | 31 (2) | 0 | 31 (5) | – | – |
Enterococcus faecalis—n (%) | 144 (11) | 0 | 63 (10) | 81 (12) | 0.284 |
Enterococcus faecium—n (%) | 70 (5) | 0 | 48 (8) | 22 (3) | 0.0005 |
MDR Enterococcus faecium—n (%) | 30 (2) | 0 | 30 (5) | – | – |
Other enterococci—n (%) | 40 (3) | 0 | 20 (3) | 20 (3) | 0.872 |
Staphylococcus aureus—n (%) | 35 (3) | 0 | 15 (2) | 20 (3) | 0.608 |
MDR Staphylococcus aureus—n (%) | 11 (1) | 0 | 11 (2) | – | – |
Coagulase-negative staphylococci—n (%) | 82 (6) | 0 | 35 (6) | 47 (7) | 0.361 |
Miscellaneous Gram-positive organisms—n (%) | 3 (0.2) | 0 | 0 | 3 (0.4) | |
Gram-negative aerobic bacilli—n (%) | 505 (38) | 0 | 287 (45) | 218 (32) | 0.0001 |
MDR Gram-negative aerobic bacilli—n (%) | 201 (15) | 0 | 201 (32) | – | – |
Enterobacterales—n (%) | 426 (32) | 0 | 237 (38) | 189 (28) | 0.0001 |
MDR Enterobacterales—n (%) | 172 (13) | 0 | 172 (27) | – | – |
ESBL-producing Enterobacterales—n (%) | 34 (3) | 0 | 34 (5) | – | – |
Escherichia coli—n (%) | 200 (15) | 0 | 118 (19) | 82 (12) | 0.0007 |
MDR Escherichia coli—n (%) | 96 (7) | 0 | 96 (15) | – | – |
Klebsiella spp.—n (%) | 59 (4) | 0 | 29 (5) | 30 (4) | 0.694 |
MDR Klebsiella spp.—n (%) | 19 (1) | 0 | 19 (3) | – | – |
Enterobacter spp.—n (%) | 78 (6) | 0 | 52 (8) | 26 (4) | 0.0007 |
MDR Enterobacter spp.—n (%) | 44 (3) | 0 | 44 (7) | – | – |
Other Enterobacterales—n (%) | 89 (7) | 0 | 38 (6) | 51 (7) | 0.324 |
MDR other Enterobacterales—n (%) | 13 (1) | 0 | 13 (2) | ||
Non-fermenting Gram-negative bacilli—n (%) | 73 (6) | 0 | 49 (8) | 24 (4) | 0.001 |
MDR Non-fermenting Gram-negative bacilli—n (%) | 29 (2) | 0 | 29 (5) | – | – |
Pseudomonas aeruginosa—n (%) | 65 (5) | 0 | 44 (7) | 21 (3) | 0.0013 |
MDR Pseudomonas aeruginosa—n (%) | 24 (2) | 0 | 24 (4) | – | – |
Miscellaneous Gram-negative organisms—n (%) | 6 (0.5) | 0 | 1 (0.2) | 5 (0.7) | 0.220 |
Anaerobes—n (%) | 116 (9) | 0 | 48 (8) | 68 (10) | 0.145 |
Bacteroides spp.—n (%) | 78 (6) | 0 | 32 (5) | 46 (7) | 0.242 |
Other anaerobes—n (%) | 38 (3) | 0 | 16 (3) | 22 (3) | 0.512 |
Fungi—n (%) | 157 (12) | 0 | 73 (12) | 84 (12) | 0.697 |
Candida albicans—n (%) | 94 (7) | 0 | 36 (6) | 58 (8) | 0.054 |
Non-albicans Candida spp.—n (%) | 54 (4) | 0 | 33 (5) | 21 (3) | 0.052 |