Normal and abnormal xylose absorption in the horse

Area of Science:

• Veterinary Medicine
• Gastroenterology
• Equine Health

Background:

• Gastrointestinal diseases are common in horses.
• Accurate diagnosis of malabsorption is crucial for effective treatment.
• The D-xylose absorption test is a potential diagnostic tool for equine GI disorders.

Purpose of the Study:

• To evaluate the D-xylose absorption test in clinically normal horses and those with gastrointestinal disease.
• To correlate D-xylose absorption test results with clinical, gross, and microscopic findings.
• To identify specific gastrointestinal lesions associated with abnormal xylose absorption.

Main Methods:

• Administered 0.5 grams of D-xylose per kilogram of bodyweight to horses.
• Monitored D-xylose absorption levels.
• Correlated absorption data with clinical signs.
• Examined gastrointestinal tissues via biopsy and necropsy for gross and microscopic lesions.

Main Results:

• The D-xylose absorption test differentiated horses with abnormal pentose absorption.
• Abnormal absorption correlated with specific gastrointestinal lesions.
• Identified lesions included villous atrophy, lamina propria edema, and lamina propria necrosis.

Conclusions:

• The D-xylose absorption test is a useful diagnostic aid for detecting abnormal pentose absorption in horses.
• Abnormal D-xylose absorption is linked to identifiable gastrointestinal pathology.
• This test aids in diagnosing equine gastrointestinal disease by identifying malabsorption syndromes.