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