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The severity of the erosive and ulcerative lesions of the squamous gastric mucosa in 10 standardbred racehorses in training was classified according to a standard scoring system. Each horse was then treated orally for 30 days with 50 g/100 kg bodyweight daily of a pectin-lecithin complex mixed into the feed. At the end of the period of treatment, the gastric lesions were re-evaluated gastroscopically and the scores were compared with those assigned at the previous evaluation. In three of the horses the gastric ulcerations had healed completely, and in six others the lesions had improved significantly.

Summary Seventeen racehorses were referred with a history of poor performance, recurrent fever, coughing and/or nasal discharge. All patients underwent a thorough diagnostic procedure, including physical examination, complete blood count, plasma fibrinogen estimation, arterial blood gas analysis, thoracic radiology and ultrasonography, endoscopy, tracheal aspiration with cytological and cultural evaluation, including sensitivity test. According to these procedures, bacterial pneumonia was diagnosed in 14 horses and bacterial pleuropneumonia in 3 horses. Streptococcus spp. were isolated in 11 cases (61.2%), Rhodococcus equi in 3 cases (16.6%), Klebsiella pneumoniae in 3 cases (16.6%) and Pseudomonas aeruginosa in one case (5.6%).

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