GASTRIC ULCERS IN EQUINES HOUSED IN A CENTER ZOONOSIS CONTROL IN RECIFE – PERNAMBUCO, BRAZIL
EGUS. Endoscopy. Horse. Stomach. Welfare.
The Equine Gastric Ulcer Syndrome (EGUS) can be divided into Equine Squamous Gastric
Disease (ESGD) and Equine Glandular Gastric Disease (EGGD). EGUS tends to manifest with
nonspecific clinical signs, and its pathophysiology is often linked to factors related to nutrition,
management, exercise, stress, and excessive use of non-steroidal anti-inflammatory drugs.
Definitive in vivo diagnosis is only possible through gastroscopy; however, rapid occult blood
tests in feces can be used as a screening tool for animals that should be referred for endoscopy.
Treatment is focused on reducing stomach acidity. The study's objectives were to evaluate the
gastric mucosa of horses housed in Recife’s Environmental Surveillance and Zoonosis Control
Management (GEVACZ), to diagnose ulcers, classify them according to location and severity,
report an unprecedented case of gastric myiasis in the region, and expand knowledge about the
disease and its relationship with risk factors and animal welfare. Gastroscopies were performed
on 20 adult horses seized by GEVACZ - Recife. The animals underwent a fasting period of 12
to 16 hours and were sedated for the gastroscopy procedure. The lesions found were classified
according to the scale of the European College of Equine Internal Medicine, based on location,
extension, and severity. Additionally, complementary tests were performed, such as rapid
occult blood test in feces on the day of endoscopy and the next day, measurement of fecal pH,
and blood collection for a complete blood count. The studied population showed a prevalence
of EGUS of 80%; 72% had EGGD lesions, 65% had ESGD, with 50% of the animals presenting
both conditions simultaneously. 85% of the animals had positive results for the occult blood
test in feces, with most showing positive albumin, which may indicate colon ulcers. One of the
animals presented a live larva moving in the aglandular mucosa, consistent with a fly larva,
indicating a case of gastric myiasis by Gasterophilus, a parasite never reported in the state of
Pernambuco. The findings provide insights to improve the management of horses in zoonosis
control centers, aiming to reduce the impact of gastric ulcers and promote animal welfare.