Improvement in Detecting the Carcinogenicity of Bracken Fern Using an Egyptian Toad

Abstract
Neoplasms developed in 18 of 98 toads, B. regularis, subjected to enforced feeding with bracken fern. They comprise 7 cases of adenocarcinoma in the ileum, 16 cases of hepatomas and 6 cases of neoplasms in the kidney due to metastases from the hepatomas. The Egyptian toad is an advantageous model for detecting the carcinogenicity of bracken fern, since the lesions occur faster than in other experimental animals.