How is spontaneous bacterial peritonitis (SBP) diagnosed?

Updated: Oct 15, 2020
  • Author: David C Wolf, MD, FACP, FACG, AGAF, FAASLD; Chief Editor: BS Anand, MD  more...
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Classic SBP is diagnosed by the presence of neutrocytosis, which is defined as greater than 250 polymorphonuclear cells (PMNs) per mm3 of ascites, in the setting of a positive ascites culture. Culture-negative neutrocytic ascites is observed more commonly. Both conditions represent serious infections that carry a 20-30% mortality rate.

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