GI	Gastrointestinal tract
ELISA	Enzymatically-linked immunosorbent assay
Ipa	Invasion plasmid antigen
EIEC	Enteroinvasive Escherichia coli
CDI	Clostridium difficile infection
EIA	Enzyme immunoassay
NAAT	Nucleic acid amplification
CT	Computed tomography
NTS	Nontyphoid Salmonella enterica
US	Ultrasonography
MRI	Magnetic resonance imaging
IBD	Irritable bowel disease
CD	Crohn’s disease
UC	Ulcerative colitis
CE	Chromoendoscopy
CTE	Computer tomography enterography
MRE	Magnetic resonance enterography
PET	Positron emission tomography
mAb	Monoclonal antibodies
CEUS	Contrast enhanced ultrasonography
MSOT	Multispectral optoacoustic tomography