title: Evaluation of ultrasonography for measuring solar soft tissue thickness as a predictor of sole ulcer formation in Holstein-Friesian dairy cows.
abstract: The aim of this research was to investigate the correlation between the thickness of solar soft tissue (SST; i.e. the corium and subcutaneous tissue) in early lactation and sole ulcer formation in late lactation. Fifty Holstein-Friesian cows were examined three times: (1) 30 days after calving (locomotion scoring, trimming, claw examination, measurement of SST); (2) 70 days after calving (locomotion scoring); and (3) 180 days after calving (locomotion scoring, trimming, claw examination). SST thickness was measured using an 8 MHz linear probe, at two points (SST1 below the apex of the pedal bone, and SST2 below the flexor tubercle). Mean values for SST1 and SST2 were 3.26 ± 0.43 mm and 4.35 ± 0.46 mm, respectively; the two measures were positively correlated (r=0.95, P<0.001). At 180 days after calving, a sole ulcer was diagnosed in 12/50 cows (24%). Cows with a thinner SST had a higher risk of developing sole ulcers than those with a thicker SST. The optimal cut-off values of SST1 and SST2 in predicting cows with sole ulcers (as calculated by ROC analysis) was ⩽ 3 mm for SST1 and ⩽ 3.9 mm for SST2. The relative risk of a sole ulcer developing, based on those cut-off values was 4.25 (95 CI, 1.77-24.88) for SST1 ⩽ 3 mm and 3.63 (95 CI, 1.18-10.8) for SST2 ⩽ 3.9 mm.
authors: Department of Veterinary Medicine, Faculty of Agriculture, University of Novi Sad, Trg Dositeja Obradovića 8, 21000 Novi Sad, Serbia. Electronic address: bojantoh@yahoo.com.
authors: B
authors: B
authors: Toholj
authors: Department of Veterinary Medicine, Faculty of Agriculture, University of Novi Sad, Trg Dositeja Obradovića 8, 21000 Novi Sad, Serbia.
authors: M
authors: M
authors: Cincović
authors: Department of Veterinary Medicine, Faculty of Agriculture, University of Novi Sad, Trg Dositeja Obradovića 8, 21000 Novi Sad, Serbia.
authors: M
authors: M
authors: Stevančević
authors: Department of Veterinary Medicine, Faculty of Agriculture, University of Novi Sad, Trg Dositeja Obradovića 8, 21000 Novi Sad, Serbia.
authors: J
authors: J
authors: Spasojevic
authors: Veterinary Scientific Institute of Serbia, Vojvode Toze 14, 11000 Belgrade, Serbia.
authors: V
authors: V
authors: Ivetić
authors: Department of Veterinary Medicine, Faculty of Agriculture, University of Novi Sad, Trg Dositeja Obradovića 8, 21000 Novi Sad, Serbia.
authors: A
authors: A
authors: Potkonjak
mesh_terms: D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000000981:diagnostic imaging*; D005260:Female; D005534:Foot Diseases / Q000000981:diagnostic imaging / Q000662:veterinary*; D016523:Foot Ulcer / Q000000981:diagnostic imaging / Q000662:veterinary*; D007774:Lactation; D007794:Lameness, Animal / Q000209:etiology; D014463:Ultrasonography / Q000662:veterinary*
keywords: Dairy cows; Lameness; Sole ulcer; Ultrasound