Typical symptoms of spontaneous bacterial peritonitis may include:

Spontaneous bacterial peritonitis (SBP) is an infection that occurs in the peritoneal cavity, typically in patients with cirrhosis and ascites. One of the hallmark presentations of SBP includes abdominal pain and fever. The abdominal pain may be diffuse or localized, and fever indicates the systemic inflammatory response to infection. Other possible symptoms could include altered mental status, nausea, and worsening of the patient's ascitic fluid characteristics, but the combination of abdominal discomfort and fever is a classic presentation.

The other choices do not typically align with the primary manifestations of SBP. Pain during urination relates more to urinary tract infections rather than peritoneal infections. Erythema of the abdomen might suggest a different condition, such as peritoneal irritation due to an inflammatory process, but it is not a typical symptom of SBP. Diarrhea may accompany various gastrointestinal illnesses but is not a core symptom of spontaneous bacterial peritonitis.

Thus, abdominal pain and fever are critical indicators that would raise suspicion for SBP in susceptible patients, often prompting further evaluation and management.