Breath hydrogen concentration and small intestinal malabsorption in calves

Area of Science:

• Veterinary Medicine
• Gastroenterology
• Animal Nutrition

Background:

• Assessing intestinal carbohydrate malabsorption is crucial for calf health.
• Breath hydrogen analysis is a non-invasive method to evaluate digestive function.

Purpose of the Study:

• To investigate the utility of breath hydrogen concentrations in assessing intestinal carbohydrate malabsorption in preruminating calves.
• To correlate breath hydrogen levels with induced small intestinal malabsorption.

Main Methods:

• Oral lactulose challenge to establish baseline breath hydrogen response to nonabsorbable carbohydrates.
• Induction of small intestinal malabsorption using chloramphenicol in calves fitted with duodenal cannulas.
• Measurement of breath hydrogen concentrations, intestinal villous length, and D-xylose absorption before and during chloramphenicol therapy.

Main Results:

• Oral lactulose significantly increased breath hydrogen concentrations in calves.
• Chloramphenicol administration significantly elevated breath hydrogen levels.
• Chloramphenicol therapy led to decreased intestinal villous length and D-xylose absorption.

Conclusions:

• Increased breath hydrogen concentrations in calves are associated with carbohydrate fermentation and decreased intestinal absorptive capacity.
• Breath hydrogen analysis shows promise as a tool for evaluating malabsorption in calves, particularly those with enteric diseases.