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Abstract

Objective

To determine whether quantification of myeloperoxidase (MPO) activity could be a useful laboratory technique to detect granulocyte infiltration in equine intestinal tissues.

Sample Population

Intestinal tissue (inflamed or healthy) collected from 16 age- and sex-matched Shetland Ponies.

Procedure

Intestinal tissue MPO activity was determined, and histologic assessment of adjacent specimens from healthy and inflamed intestine was done.

Results

Intestinal tissue MPO activity and histopathologic score increased with time after castor oil challenge and peaked at 16 hours in an equine diarrhea model in which individual ponies provided their own control tissues.

Conclusions

Intestinal tissue inflammation scores correlated positively with tissue MPO activity in adjacent specimens.

Clinical Relevance

Tissue MPO assay may be a useful laboratory tool to quantify intestinal mucosal inflammation in ponies. (Am J Vet Res 1999;60:807–813)

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in American Journal of Veterinary Research