Overall totals (%) Mean age in years Sort by size Heavy horses (>650kg) Light horses (<650kg) Ponies/donkeys Sort by gender Mare Stallion Gelding Horses with gastrointestinal disorders 52/134 (38.8) Colic Diarrhoea Colic and diarrhoea Others Horses without gastrointestinal disorders 82/134 (61.2) Orthopaedics/bone fracture Wounds Muscular dystrophy Ophthalmology Weight loss Others Horses with an antibiotic treatment 54/134 (40.3) Penicillin Penicillin-Gentamicina Penicillin-Gentamicin-Metronidazolea Ceftiofur Trimethoprim/sulfamethoxazole Othersv Placement of a nasogastric tube 43/134 (32.1) C. difficile negative horses (%) 129 of 134 (96.3%) 10.2 C. difficile positive horses (%) 5 of 134 (3.7%) 8.4 16 (12.4) 94 (72.8) 19 (14.7) 0 (0) 4 (80) 1 (20) 62 (48.9) 24 (18.6) 43 (33.3) 49 (94.2) 30 (61.2) 18 (36.7) 1 (2.0) 0 (0) 79 (96.3) 23 (29.1) 14 (17.7) 8 (10.1) 8 (10.1) 3 (3.8) 23 (29.1) 52 (96.3) 4 (7.7) 9 (17.3) 3 (5.8) 16 (30.8) 6 (11.5) 14 (27) 40 (93) 3 (60) 0 (0) 2 (40) 3 (5.8) 2 (66.6) 0 (0) 0 (0) 1 (33.3) 3 (3.7) 0 (0) 2 (66.6) 0 (0) 0 (0) 0 (0) 1 (33.3) 2 (3.7) 0 (0) 1 (50) 0 (0) 0 (0) 0 (0) 1 (50) 3 (7)