© 1981 The Gerontological Society of America
Histopathological Profile of a Wistar Rat Stock Including a Survey of the Literature1
2 Laboratory of Pathology, National Inst. of Public Health Bilthoven, The Netherlands
3 Laboratory of Toxicology, National Inst. of Public Health Bilthoven, The Netherlands
| Abstract |
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This study is concerned with the histopathological changes and tumors and their incidences in the Wistar SPF Tox rat. Also included are data on survival, growth and haematology. The animals were untreated and were investigated for 30 months. The data are compared with those from two Wistar substocks, which had been used in the same laboratory: the Wistar CPB and the Wistar Conv. The results are summarized in tables and figures and are compared with data from the literature. A survey of studies dealing with spontaneous lesions and tumors in rats is given.
A wide variety of tumor types and a relatively high tumor incidence were found in the Wistar SPF Tox rats. Since most of the tumors were found after 24 months, this high incidence was correlated with the life expectancy.
Key Words: Histopathology Spontaneous lesions Tumor incidence Wistar rat
1 The authors wish to express their gratitude to Dr. P. W. Helleman and Miss M. C. M. Geleijnse for performing the haematological studies, to Mr. J. Weiss for his helpful assistance in the collection of the pertinent literature and to Dr. E. J. Ruitenberg, Dr. G. van Steenis and Dr. A. C. Ford for their critical remarks on the manuscript.
4 Present address: Central Inst. for Nutrition & Food Research, T.N.O., P.O. Box 360, 3700 AJ Zeist, The Netherlands.
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