Oral Lesions in the Bit Area in Finnish Trotters After a Race : Lesion Evaluation, Scoring, and Occurrence

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Tuomola , K , Maki-Kihniä , N , Kujala-Wirth , M , Mykkänen , A & Valros , A 2019 , ' Oral Lesions in the Bit Area in Finnish Trotters After a Race : Lesion Evaluation, Scoring, and Occurrence ' , Frontiers in Veterinary Science , vol. 6 , 206 . https://doi.org/10.3389/fvets.2019.00206

Title: Oral Lesions in the Bit Area in Finnish Trotters After a Race : Lesion Evaluation, Scoring, and Occurrence
Author: Tuomola, Kati; Maki-Kihniä, Nina; Kujala-Wirth, Minna; Mykkänen, Anna; Valros, Anna
Contributor: University of Helsinki, Production Animal Medicine
University of Helsinki, Production Animal Medicine
University of Helsinki, Equine and Small Animal Medicine
University of Helsinki, Production Animal Medicine
Date: 2019-07-12
Language: eng
Number of pages: 12
Belongs to series: Frontiers in Veterinary Science
ISSN: 2297-1769
URI: http://hdl.handle.net/10138/304276
Abstract: Oral lesions in the bit area are common in horses, but not comprehensively studied in harness racing horses. This study describes the type and occurrence of oral soft tissue lesions in the area affected by the bit, hereafter called the bit area, in trotters after a race. Based on our results, we suggest a system for scoring lesions according to size, type (bruise or wound), age, and depth (superficial or deep). The data was collected during a welfare program for trotters, conducted by The Finnish Trotting and Breeding Association (Suomen Hippos ry). The rostral part of the mouth of 261 horses (151 Standardbreds, 78 Finnhorses, and 32 ponies) was examined after a race in a systematic manner, using a bright light source without sedation or a mouth gag. The lip commissures (outside and inside), bars of the mandible, buccal area near the second upper premolar teeth, tongue, and hard palate were visually examined; bars of the mandible were also palpated. Points were assigned to every lesion and then added together, such that each horse got an acute lesion score. Based on the score, the horses were divided into four groups (A- D) as follows: Group A, no lesions; B, mild lesions; C, moderate lesions; D, severe lesions. Of all the horses examined, 84% (219/261) had acute lesions in the bit area. In total, 21% (55/261) had mild lesions, 43% (113/261) had moderate lesions, and 20% (51/261) had severe lesions. Visible bleeding outside the mouth was observed in 2% (6/261) of the horses. Further, 5% of the horses (13/261) had blood on the bit when it was removed from the mouth, even though no blood was visible outside the mouth. In conclusion, soft tissue lesions in the bit area were common in the Finnish trotters examined. Moreover, the absence of blood outside the mouth does not rule out serious injuries inside the mouth. The scoring system presented can be used for evaluating the severity of oral lesions in different equestrian disciplines and populations to allow for comparable data across studies.
Subject: animal welfare
bit
harness racing
horse
oral lesion
trotter
PAIN
413 Veterinary science
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