Community-Acquired Methicillin-Resistant Pyogenic Liver Abscess: A Case Report

Area of Science:

• Infectious Diseases
• Hepatology
• Microbiology

Background:

• Pyogenic liver abscesses are uncommon, with most originating from hepatobiliary issues.
• Staphylococcus aureus, particularly methicillin-resistant strains (MRSA), is an infrequent cause of liver abscesses.
• Community-acquired MRSA (CA-MRSA) liver abscesses are exceptionally rare.

Purpose of the Study:

• To report a case of a liver abscess caused by community-acquired MRSA.
• To emphasize the diagnostic and therapeutic considerations for this rare condition.

Main Methods:

• A case study of a patient presenting with prolonged fever and hepatomegaly.
• Diagnostic workup included blood tests, abdominal ultrasound, and computed tomography.
• Pus drainage from abscesses and microbiological cultures were performed.
• Treatment involved intravenous vancomycin followed by oral linezolid.

Main Results:

• Abdominal ultrasound revealed multiple liver abscesses.
• Cultures from drained pus isolated methicillin-resistant Staphylococcus aureus (MRSA).
• The patient responded well to vancomycin and linezolid therapy, with resolution of fever and discharge.

Conclusions:

• This case underscores the possibility of community-acquired MRSA as a causative agent for pyogenic liver abscesses.
• Empirical antibiotic treatment for liver abscesses should be adjusted to include coverage for Gram-positive organisms, especially Staphylococcus aureus, in patients with relevant risk factors.
• Prompt diagnosis and appropriate antibiotic selection are crucial for successful management.