| AMB | ambulatory movement |
| Amg | amygdala |
| BLA | basolateral amygdala |
| BNST | bed nucleus of stria terminalis |
| BSM | bifidus selective medium |
| CeA | central nucleus of the amygdala |
| CFU | colony-forming unit |
| CIT | citalopram |
| CNS | central nervous system |
| EPM | elevated plus maze |
| FOS | fructooligosaccharide |
| GABA | gamma-aminobutyric acid |
| GOS | galactooligosaccharide |
| GRA | granulocyte |
| HCT | haematocrit |
| HGB | haemoglobin concentration |
| HOR | horizontal movements |
| HPA | hypothalamic–pituitary–adrenal axis |
| IL | interleukin |
| LPS | lipopolysaccharide |
| LYM | lymphocyte |
| MCH | mean corpuscular haemoglobin |
| MCHC | mean corpuscular haemoglobin concentration |
| MCV | mean corpuscular volume |
| MON | monocyte |
| MPV | mean platelet volume |
| PCT | plateletcrit |
| PLT | platelet |
| PTSD | post-traumatic stress disorder |
| RBC | red blood cell |
| SSR | selective serotonin reuptake inhibitor |
| TNF | tumour necrosis factor |
| VER | vertical movement |
| WBC | white blood cell |