Pathology of gastritis and gastric ulceration in the horse. Part 1: range of lesions present in 21 mature individuals.

This research study investigates the range of gastric lesions in adult horses, aiming to better understand their variety and extent. The results are based on a post-mortem analysis of stomachs from a mixed population of 21 horses.

Study Objective

The focus of the research was to understand the actual extent and variety of gastric lesions in mature horses. Gastric ulceration is a common disease in high-performance horses, whose stomach histopathology – the microscopic examination of tissue in order to study manifestations of disease – remains largely unexplored, both in healthy and diseased animals. Therefore, the research’s aim was to attain a comprehensive understanding of these ulcers to improve the interpretation of gross findings and help identify lesion types and their origins in different stomach areas.

Methods Used

• The researchers performed post-mortem examinations on the stomachs of 21 horses from varied populations.
• Mucosal abnormalities were documented in both written and photographic forms.
• Samples from all gross lesions were taken and processed for histopathological analysis, a standard method to examine tissues at a microscopic level.
• They used special staining techniques, including Gram, PAS, and Warthin Starry, for the histopathology when needed to aid in diagnosis and characterization of the lesions.
• Both gross and histological appearances were used to classify the type of lesions.

Results of the Study

• Gastric lesions were classified in the squamous region as hyperkeratosis, punctate scars, diffuse erosions/ulcerations, and margo injuria, and in the glandular region as hyperaemia, focal erosions, and ulcerations.
• The study claimed to be the first to recognize glandular metaplasia in the stomach of horses – a change from one type of tissue to another.
• No Helicobacter-like organisms, which are usually associated with ulcers, were detected in association with lesion development.

Conclusion

The study used both gross and histological examinations to shed light on a broad range of naturally occurring gastric lesions in horses. From the data at hand, it is now possible to further analyze the development of these lesions. More research is needed to understand the range of pathology in a larger, more diverse group of horses, allowing for broader conclusions and greater understanding in the future.