BBB	blood-brain barrier
ELISA	enzyme-linked immunosorbent assay
GM	gut microbiota
IFN	interferon
IL	interleukin
Iba1	ionized calcium-binding adapter molecule 1
MMSE	Mini-Mental Status Examination
NOR	novel object recognition
PD	Parkinson’s disease
PCoA	principal coordinate analysis
rRNA	ribosomal RNA
rpm	revolutions per minute
SV	sequence variants
TH	tyrosine hydroxylase
TNF	tumor necrosis factor
UPDRS	Unified Parkinson’s Disease Rating Scale