AI	artificial intelligence
ADHD	attention deficit hyperactivity disorder
AGA/ACG	American Gastroenterological Association/American College of Gastroenterology
ARGs	antibiotic resistance genes
B. breve	Bifidobacterium breve
B. longum	Bifidobacterium longum
B. lactis	Bifidobacterium lactis
C. albicans	Candida albicans
C. difficile	Clostridium difficile
CDAD	C. difficile induced diarrhea
CNS	central nervous system
COVID-19	Coronavirus disease 2019
DNA	deoxyribonucleic acid
E. coli	Escherichia coli
ETEC	enterotoxigenic E. coli
EIEC	enteroinvasive E. coli
EHEC	enterohemorrhagic E. coli
EAEC	enteroaggregative E. coli
EPEC	enteropathogenic E. coli
ENS	enteric nervous system
4-EOTC	4-epi-oxytetracycline
FODMAP	fermentable oligosaccharides, disaccharides, monosaccharides, and polyols
FMT	fecal microbiota transplantation
GTT	gut transit time
IBS	irritable bowel syndrome
IBS-C	constipation-predominant IBS
IBS-D	diarrhea-predominant IBS
IBD	inflammatory bowel disease
L. acidophilus	Lactobacillus acidophilus
L. bulgaricus	Lactobacillus bulgaricus
L. casei	Lactobacillus casei
L. paracasei	Lactobacillus paracasei
L. reuteri	Lactobacillus reuteri
L. rhamnosus	Lactobacillus rhamnosus
L. GG	Lactobacillus rhamnosus GG
OTC	oxytetracycline
RCT	randomized controlled trial
RNA	ribonucleic acid
rRNA	ribosomal RNA
SIBO	small intestinal bacterial overgrowth
SCFA	short-chain fatty acid SCFA
S. aureus	Staphylococcus aureus
S. epidemidis	Staphylococcus epidermidis
S. boulardii	Saccharomyces boulardii
S. typhi	Salmonella typhi
S. thermophilus	Streptococcus thermophilus
sIgA	immunoglobulin A
TD	traveler’s diarrhea
V. cholerae	Vibrio cholerae