CTLA-4	cytotoxic T-lymphocyte-associated protein 4
C4	Complement component 4
EBV	Epstein-Barr virus
GM	gut microbiota
GPR41-GPR43	G protein-coupled receptors
HCT	hematopoietic cell transplantation
HCV	hepatitis C virus
HHV-8	human herpesvirus 8
HIV	human immunodeficiency virus
HMP	Human Microbiome Project
IL10	Interleukin 10
IFN	Interferon
irAEs	immune related adverse events
LBP	LPS binding protein
LPS	lipopolysaccharide
MALT	mucosal-associated lymphoid tissue
MD	Microbial translocation
MS	multiple sclerosis
NF-kB	nuclear factor kappa-light-chain-enhancer of activated B cells
NGS	next generation sequencing
NOD-1	Nucleotide-binding oligomerization domain-containing protein 1
NSCLC	non–small cell lung cancer
PAMPs	pathogen associated molecular patterns
PD-1	programmed cell death protein 1
PD-L1	programmed cell death protein 1 ligand
PTLD	post-transplantation lymphoproliferative disorder
ROS	reactive oxygen species
sCD14	soluble CD14
SCFAs	short-chain fatty acids
SPF	specific pathogen-free
TLRs	Toll-like receptors
Th1-Th17	T helper cells
Treg	regulatory T cell
VLP	virus-like particles