OPE	Onion peel extract
SE	Salmonella Enteritidis
HPLC-MS	High performance liquid chromatography mass spectrometry
HPLC-UV	High performance liquid chromatography with ultraviolet detection
dpi	Day post infection
NA	Nalidixic acid
CFU	Colony forming unit
SBM	Soybean meal
BW	Body weight
FI	Feed intake
BWG	Body weight gain
FCR	Feed conversion ratio
UHPLC	Ultra-high performance liquid chromatography
RPLC	Reversed-phase liquid chromatography
HILIC	Hydrophilic interaction chromatography
PCA	Principal component analysis
OPLS-DA	Orthogonal partial least squares discriminant analysis
VIP	Variable importance in projection
KEGG	Kyoto Encyclopedia of genes and genomes
BioCyc	Biological cycles
ChEBI	Chemical entities of biological interest
HMDB	Human metabolome database
EHMN	Edinburgh human metabolic network
TCA	Tricarboxylic acid
BCAA	Branched-chain amino acid
GSH	Glutathione
ROS	Reactive oxygen species
SCFA	Short-chain fatty acid