Table 2.
Micro-organisms isolated from peritoneal fluid (expressed as total number and proportions) in the two groups of patients with postoperative peritonitis following conventional and bariatric surgery
| Conventional surgery | Bariatric surgery | Overall comparison | ||||
|---|---|---|---|---|---|---|
| Above transverse mesocolon | Below transverse mesocolon | Restrictive procedures | Roux-en-Y gastric bypass | Conventional surgery | Bariatric surgery | |
| Aerobes | 113 (81) | 203 (77) | 40 (82) | 59 (81) | 316 (79) | 99 (81) |
| Gram-positive bacteria | 47 (34) | 93 (35) | 29 (59) | 30 (41)a | 140 (35) | 59 (48)b |
| Streptococci | 15 (11) | 9 (3)c | 20 (41) | 14 (19)a | 24 (6) | 34 (28)b |
| Enterococcus spp | 17 (12) | 58 (22)d | 2 (4) | 7 (10) | 75 (19) | 9 (7)b |
| Staphylococci | 14 (10) | 25 (10) | 5 (10) | 9 (12) | 39 (10) | 14 (11) |
| Gram-negative bacteria | 66 (47) | 110 (42) | 11 (22) | 29 (40) | 176 (44) | 40 (33)e |
| Escherichia coli | 19 (14) | 54 (21) | 3 (6) | 10 (14) | 73 (18) | 13 (11) |
| Klebsiella spp | 5 (4) | 13 (5) | 2 (4) | 5 (7) | 18 (4) | 7 (6) |
| Enterobacter spp | 13 (9) | 13 (5) | 1 (2) | 3 (4) | 26 (6) | 4 (3) |
| Other Enterobacteriaceae | 18 (13) | 12 (5) | 1 (2) | 7 (10) | 30 (7) | 8 (7) |
| Non-fermenting Gram-negative bacteria | 7 (5) | 15 (6) | 1 (2) | 1 (1) | 22 (5) | 2 (2) |
| Anaerobes | 5 (4) | 35 (13)c | 2 (4) | 3 (4) | 40 (10) | 5 (4)e |
| Bacteroides spp | 3 (2) | 23 (9) | – | 2 (3) | 26 (6) | 2 (2)e |
| Fungi | 21 (15) | 25 (10) | 7 (14) | 11 (15) | 46 (11) | 18 (15) |
| Total number of micro-organisms | 139 | 263 | 49 | 73 | 402 | 122 |
| Monomicrobial infectionf | 7 (15) | 12 (14) | 6 (26) | 5 (19) | 19 (14) | 11 (22) |
| Presence of multidrug-resistant strainsf | ||||||
| Bacteremiaf | 20 (43) | 34 (39) | 4 (17) | 6 (23) | 54 (40) | 10 (20)e |
| 12 (26) | 21 (24) | 4 (17) | 4 (15) | 33 (25) | 8 (16) | |
aIn the bariatric surgery group, comparisons between restrictive procedures and Roux-en-Y Gastric bypass, p < 0.05
bOverall comparison of conventional surgery and bariatric surgery, p < 0.01
cIn the conventional surgery group, comparisons between above and below transverse mesocolon surgery, p < 0.01
dIn the conventional surgery group, comparisons between above and below transverse mesocolon surgery, p < 0.05
eOverall comparison of conventional surgery and bariatric surgery, p < 0.05
fProportions calculated per number of patients