Subacute toxicity of dietary T-2 toxin in mice



Title Subacute toxicity of dietary T-2 toxin in mice: morphological and hematological effects
Author(s) M. A. Hayes, James E. C. Bellamy, H. B. Schiefer
Journal Canadian Journal of Comparative Medicine. Revue Canadienne de Medecine Comparee
Date 1980
Volume 44
Issue 2
Start page 203
End page 218
Abstract Changes in hematopoietic and lymphoid tissues of young Swiss mice fed a balanced semipurified diet containing T-2 toxin (20 ppm) were examined after one, two, three, four or six weeks. During the first three weeks of exposure of T-2 toxin, lymphoid tissues, bone marrow and splenic red pulp became hypoplastic, resulting in anemia, lymphopenia and eosinopenia. Subsequently, during continued exposure to T-2 toxin, hematopoietic cells regenerated in bone marrow and splenic red pulp and became hyperplastic by six weeks. Granulopoiesis and thrombopoiesis resumed in advance of erythropoiesis. All lymphoid tissues remained atrophic throughout the six week trial. Mice exposed to T-2 toxin also developed perioral dermatitis and hyperkeratosis with ulceration of the mucosa of the esophageal region of the stomach. These results indicated that young mice were susceptible to both the irritant and the hematopoietic-suppressive toxic effects of dietary T-2 toxin. However, supression of hematopoiesis was transient and did not lead to hematopoietic failure.

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