CBC
Chem
LFTs
Stool PCR
Diagnostic gold standard
100% sensitive and specific
Stool or abscess microscopy
<60% SN; unreliable diagnostic test
Stool, serum, or abscess fluid antigen
Indirect hemagglutination (antibody)
Diagnostic gold standard
100% sensitive and specific
<60% SN; unreliable diagnostic test
Abdominal Ultrasound
58-98% SN for liver abscess (depending on size/location)
Abdominal CT
Alternative to ultrasound; equally effective in identifying abscess
58-98% SN for liver abscess (depending on size/location)
Alternative to ultrasound; equally effective in identifying abscess
Amebiasis
Infectious- shigella, salmonella, campylobacter, E. Coli.
Viral hepatitis
Noninfectious- Inflammatory bowel disease, ischemic colitis, diverticulitis, AV malformation.
Autoimmune hepatitis
Pyogenic abscess
Ischemic hepatitis
Aerobic: Escherichia coli, Klebsiella, Pseudomonas