mGWAS	Microbiome-wide genome association studies
SCFAs	Short-chain fatty acids
AHR	Aryl hydrocarbon receptor
HIF-1$\alpha$	Hypoxia-inducible factor 1-alpha
GABA	Gamma-aminobutyric acid
DON	Deoxynivalenol
ZEN	Zearalenone
IAP	Intestinal alkaline phosphatase
MAMPs	microbe-associated molecular patterns
ETEC	Enterotoxigenic Escherichia coli
FMT	Fecal microbiota transplantation
LPS	Lipopolysaccharide
MCFAs	Medium-chain fatty acids
HPA	hypothalamic–pituitary–adrenal
5-HT	5-hydroxytryptamine
cAMP	Cyclic adenosine monophosphate
STb	heat-stable enterotoxin b
Th17	T-helper cell 17
sIgA	Secretory immunoglobulin A
FOS	Fructo-oligosaccharides
GOS	Galacto-oligosaccharides
XOS	Xylo-oligosaccharides
MOS	Mannan-oligosaccharides
DAO	Diamine oxidase