Pyogenic liver abscess is a pus-filled area within the liver.

There are many potential causes of liver abscesses. They can be caused by an abdominal infection such as appendicitis, diverticulitis, or a perforated bowel. Other causes may be an infection in the blood, an infection of the biliary (liver secretion) tract, or trauma that damages the liver.

The most common bacteria that cause liver abscesses are Escherichia coli, klebsiella, enterococcus, staph and strep, and bacteroides.

• Fever, chills
• Nausea, vomiting
• Pain in right upper abdomen
• Loss of appetite
• Unintentional weight loss
• Weakness
• Yellow skin (jaundice)
• Chalk-colored stool
• Dark urine

• Blood culture shows bacteria - this occurs in about half of the patients with pyogenic liver abscess
• Liver enzymes (liver function tests) and bilirubin may be high
• High white blood cell count, indicating infection
• Abdominal CT scan
• Abdominal ultrasound
• Liver biopsy

The treatment usually consists of surgical or percutaneous (through the skin, with a needle) drainage of the abscess. This is accompanied by prolonged antibiotic therapy. Sometimes antibiotics alone can cure the infection.

The death rate is 10-30% in treated patients, and it is higher in those with multiple abscesses.

Life-threatening sepsis can develop.

Call your health care provider if any symptoms of this disorder develop.

Also call if severe abdominal pain, confusion or decreased consciousness, persistent high fever, or other new symptoms develop during or after treatment.

Prompt treatment of abdominal and other infections may reduce the risk of developing a liver abscess. Many cases are not preventable.