Final Thesis Curriculum in Veterinary Medicine Inflammatory bowel disease (IBD) is a group of chronic gastrointestinal disorderscharacterized by different inflammatory cell infiltrations in the intestines. The most common clinical signs are weight loss, recurrent colic, lethargy, and diarrhea in horses with IBD. The diagnosis is complex and requires a multimodal approach. The main aims of this study were to describe the possible diagnostics methods and evaluate the survivability and recurrence in horses diagnosed with IBD. The hypothesis was to identify diagnostics factors that help to predict the recurrence or negative outcome of the disease. The research material of this retrospective study consisted of horses brought to Hyvinkää Equine Hospital in Finland and diagnosed with IBD between 2019 and 2020. Data collected included anamnesis, diagnostics test results, and a description of medical treatment. Sixty-four horses were included in the study. The most common clinical signs in the study population were poor performance, weight loss, and recurrent colic. Most horses (84,6%) had abnormal oral glucose absorption test (OGAT). Eosinophilic proctitis was the most common (50,0% of the cases) type in rectal biopsies, 42,0% of cases had lymphocyticplasmacytic proctitis, and 8,0% of the cases had neutrophilic proctitis. The disease reoccurred in 59,4% of the horses, and 18,8% of the horses were euthanized. The study could not find a statistically significant association between recurrence or survivability of the disease and diagnostic test results (blood work, OGAT, gastroduodenoscopy, biopsy result or type), gender, or age. Hobuste põletikulised soolehaigused on grupp kroonilisi seedetrakti haigusi, mida iseloomustab erinevate põletikurakkude infiltreerumine sooltes. Sagedamini esinevateks haigustunnusteks on kaalukadu, korduvad koolikud, letargia ja kõhulahtisus. Diagnostika on keeruline ja nõuab mitmete diagnostikameetodite kasutamist. Selle uuringu põhilised eesmärgid olid kirjeldada võimalikke diagnostikameetodeid ja hinnata võimalust ennustada nende abil põletikulise soolehaiguse diagnoosiga hobuste elumust ja haiguse võimalikku kordumist. Tegemist on retrospektiivse uuringuga, milles kasutati Soomes asuva Hyvinkää hobusekliiniku põletikulise soolehaiguse diagnoosiga patsientide andmeid perioodil 2019 - 2020. Andmed sisaldasid anamneesi, diagnostiliste uuringute tulemusi ja raviplaani. Selles uuringus kasutati 64 hobuse andmeid. Enamikul hobustest (84,6%) oli ebanormaalne suukaudse glükoosi imendumise testi tulemus. Eosinofiilne põletik pärasoole limaskestas oli leid 50,0%-l võetud rektaalbiopsiatest, 42,0%-oli leid lümfo-plasmatsütaarne, ning 8,0%-l juhtudest neutrofiilne. Haigus kordus 59,4%-l hobustest ja 18,8% uuringugrupi hobustest eutaneeriti. Uuringus ei leitud statistiliselt olulisi seoseid põletikulise soolehaiguse taastekke ja hobuste elumuse ning diagnostiliste testide (vereproovide, suukaudse glükoosi imendumise testi, gastroskoopia, rektaalbiopsia) tulemuste, hobuste vanuse ja soo vahel.