What Is Septic Peritonitis and How Is It Managed?

Written by Medicover Team and Medically Reviewed by Dr Manoj Kumar D , General Surgeons

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1. Causes 2. Find a Doctor 3. Diagnosis 4. Treatment 5. FAQs

Septic peritonitis is a life-threatening infection and inflammation of the peritoneum, the thin membrane lining the abdominal cavity and covering the abdominal organs. It usually occurs when bacteria or, less commonly, fungi enter the peritoneal cavity through a perforated abdominal organ, abdominal injury, surgery, or bloodstream infection. Without prompt medical treatment, septic peritonitis can rapidly lead to sepsis, multiple organ failure, and death.

What Are the Types of Septic Peritonitis?

Septic peritonitis is classified based on the source of infection.

Primary Peritonitis (Spontaneous Bacterial Peritonitis): Occurs without a perforated abdominal organ, commonly in people with liver cirrhosis and ascites.
Secondary Peritonitis: Results from perforation or infection of an abdominal organ, such as the appendix, stomach, or bowel.
Tertiary Peritonitis: Persistent or recurrent abdominal infection despite appropriate treatment.
Fungal Peritonitis: Caused by fungal organisms, usually in immunocompromised individuals or patients receiving peritoneal dialysis.

What Are the Symptoms of Septic Peritonitis?

Symptoms usually develop suddenly and require immediate emergency medical evaluation.

Severe abdominal pain
Abdominal tenderness and guarding
Abdominal bloating or distension
Fever and chills
Nausea and vomiting
Rapid heart rate
Difficulty breathing
Loss of appetite
Confusion or altered mental status in severe cases
Extreme weakness or fatigue

What Causes Septic Peritonitis?

Septic peritonitis develops when bacteria or fungi enter the peritoneal cavity and trigger widespread inflammation.

Ruptured appendix
Perforated stomach or intestinal ulcer
Perforated bowel due to diverticulitis or trauma
Abdominal surgery complications
Gallbladder infection or bile leakage
Peritonitis associated with peritoneal dialysis
Pancreatitis with secondary infection
Penetrating abdominal injuries

When Should You See a Doctor for Septic Peritonitis?

Septic peritonitis is a medical emergency. Immediate evaluation by an emergency physician, general surgeon, or gastrointestinal surgeon is essential.

Seek emergency medical care immediately if you experience:

Sudden severe abdominal pain
Rigid or swollen abdomen
Fever with abdominal tenderness
Persistent vomiting
Difficulty breathing
Confusion, dizziness, or fainting
Symptoms following abdominal injury or surgery

Rapid diagnosis and emergency treatment are critical to prevent sepsis, organ failure, and death.

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How Is Septic Peritonitis Diagnosed?

Diagnosis involves a combination of clinical evaluation, laboratory testing, and imaging studies to identify the source of infection.

Medical history and physical examination
Complete blood count (CBC)
Blood cultures
Inflammatory markers such as C-reactive protein (CRP) and procalcitonin
Kidney and liver function tests
Abdominal X-ray
Contrast-enhanced CT scan of the abdomen
Ultrasound when appropriate
Paracentesis with peritoneal fluid analysis and culture

How Is Septic Peritonitis Treated?

Septic peritonitis requires immediate hospitalization, intravenous antibiotics, and treatment of the underlying source of infection.

Broad-spectrum intravenous antibiotics
Intravenous fluids and electrolyte replacement
Emergency surgery to repair perforations or remove infected tissue when necessary
Drainage of abscesses or infected fluid collections
Pain management
Nutritional support
Intensive care monitoring for critically ill patients
Antifungal therapy when fungal infection is confirmed

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What Are the Risk Factors for Septic Peritonitis?

Certain medical conditions and procedures increase the risk of developing septic peritonitis.

Liver cirrhosis with ascites
Peritoneal dialysis
Recent abdominal surgery
Abdominal trauma
Gastrointestinal perforation
Appendicitis or diverticulitis
Diabetes
Weakened immune system
Advanced age

What Complications Can Septic Peritonitis Cause?

If not treated promptly, septic peritonitis can rapidly become life-threatening.

Sepsis
Septic shock
Multiple organ failure
Abdominal abscesses
Acute kidney injury
Respiratory failure
Adhesions and bowel obstruction
Death

Can Septic Peritonitis Be Prevented?

Prevention includes prompt treatment of abdominal infections, early management of appendicitis and peptic ulcers, careful surgical techniques, proper care of peritoneal dialysis catheters, good wound hygiene, and regular medical follow-up for people with liver disease or weakened immunity. Seeking immediate care for severe abdominal pain can help prevent life-threatening complications.

What Is the Prognosis for Septic Peritonitis?

The prognosis depends on the cause of infection, the patient's overall health, and how quickly treatment is started. Early diagnosis, rapid antibiotic therapy, and timely surgical intervention significantly improve survival. Delayed treatment increases the risk of septic shock, permanent organ damage, prolonged hospitalization, and death.