The evaluation of cotton twine as a new anti-inflammatory assay.

A new anti-inflammatory assay is described, utilizing a subcutaneously implanted elongated section of cotton twine to induce granuloma in rats. The cotton twine irritant is easily introduced under the abdominal skin and after seven days a well formed granuloma is established. The procedure works effectively for both steroidal and nonsteroidal anti-inflammatory drug evaluation. Consistency of the cotton twine eliminates individual weighing of each section and uniformity in compactness affords reproducible results.