Among the great number of pathologies that affect young horses, gastric ulcers are considered one of the most important. MURRAY et al. (1987) working with clinically normal foals established a prevalence of gastric ulcers of 51%. The same author after carrying out 1988). Although its aethiology hasn't been well established, a variety of factors are suspected to be involved in its genesis, where stress plays an important role. A disruption of the balance between protective and aggressive factors is suggested and once the last is predominant the ulcer would be established. According to the kind, presence or absence of clinical signs, the locadon of lesions on gastric mucosa and its complications, four clinical syndromes are described in foals: 1) silent ulcers, 2) active ulcers, 3) perforated ulcers and 4) gastric or duodenal obstruction. Diagnosis should be based on history, clinical signs, response to treatment and mainly on endoscopic findings. Gastric ulcers can be treated with drugs such as acid secretions inhibitors, local antacids, mucosal protectants, prostaglandin analogs and motility stimulants. If necessary, the surgical treatment can be used.
gastric ulcer; foal