Table 3.
Bacteriology, pathogenesis and confirmatory investigations of hepatic neoplasm- and non-hepatic neoplasm-associated pyogenic liver abscess n (%)
| Bacteriology | HN group(n = 35) | Non-HN group(n = 283) | P value |
| Gram-positive organism | 6 (17.2) | 23 (8.1) | 0.04 |
| Streptococcus milleri | 3 (8.6) | 18 (6.4) | |
| Others | 3 (8.6) | 5 (1.7) | |
| Gram-negative organism | 8 (22.8) | 171 (60.4) | < 0.01 |
| Escherichia coli | 2 (5.7) | 27 (9.5) | |
| Klebsiella spp | 5 (14.2) | 135 (47.7) | |
| Others | 1 (2.9)1 | 9 (3.2)2 | |
| Mixed growth | 14 (40.0) | 43 (15.2) | < 0.01 |
| Unknown | 7 (20.0) | 46 (16.3) | < 0.05 |
| Antibiotic resistance | 10 (28.6) | 49 (17.3) | 0.05 |
| Pathogenesis | |||
| Biliary tract disorder | 25 (71.4) | 175 (61.8) | 0.14 |
| Portal pyemia | 3 (8.6) | 11 (3.9) | 0.10 |
| Direct spread | 5 (14.3) | 0 (0) | < 0.01 |
| Hematogenous | 2 (5.7) | 5 (1.8) | 0.07 |
| Cryptogenic | 0 (0) | 15 (5.3) | 0.08 |
| Not investigated | 0 (0) | 77 (27.2) | < 0.01 |
1
Bacteriodes (n = 1);
2
Enterobacter (n = 4), Citrobacter (n = 2), Fusobacterium (n = 2), Proteus (n = 1). HN: Hepatic neoplasm.