| CFU | colony forming unit |
| CLSM | confocal laser-scanning microscopy |
| DAPI | 4′,6-diamidino-2-phenylindole |
| DSS | dextran sulfate sodium |
| FCS | fetal calf serum |
| HtrA | high-temperature requirement A |
| IBD | inflammatory bowel disease |
| IBS | irritable bowel syndrome |
| IFN | interferon |
| IPA | Ingenuity Pathway Analysis |
| LPS | lipopolysaccharide |
| MOI | multiplicity of infection |
| OD | optical density |
| RXR | retinoid X receptor |
| TER | transepithelial electrical resistance |
| TJ | tight junction |
| TNBS | 2,4,6-trinitrobenzenesulfonic acid |
| TNF | tumor necrosis factor |
| TUNEL | TdT-mediated dUTP-biotin nick end labeling |
| VD | vitamin D |
| VDR | vitamin D receptor |
| ZO-1 | zonula occludens-1 |