Table 2: Differential diagnosis for ascitic fluid infection [23].
| VARIANT | PMN count cells/mm3 | Culture |
| SPB | ≥ 250 | Single organism |
| Culture Negative Neutrocytic Ascites (CNNA) | ≥ 250 | Negative |
| Monomicrobialnonneutrocytic ascites | < 250 | Single organism |
| Secondary bacterial peritonitis | ≥ 250 | Polymicrobial |
| Polymicrobialbacteriascites | < 250 | Polymicrobial |