Final answer:
Late signs of peritonitis include severe abdominal pain, significant bloating, high fever, changes in mental status, severe fatigue, inability to pass stool or gas, and potentially shock.
Step-by-step explanation:
Late signs of peritonitis may include severe symptoms such as advanced abdominal pain, marked bloating, high fever, and changes in mental status or consciousness due to the infection's impact on the body as a whole. These symptoms could be indicative of systemic inflammation and sepsis, conditions that can be life-threatening and require immediate medical intervention. Late-stage peritonitis might also involve symptoms such as severe fatigue, inability to pass stool or gas, and, in some cases, shock, due to the body's response to the widespread infection.