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3987439 
Technical Report 
Clinical laboratory parameters for Crl:CD (SD) rats 
Giknis, MLA; Clifford, CB 
2006 
Charles River Laboratories 
Wilmington, MA 
18 
English 
Purpose

The purpose of this publication is to provide the study director or reviewing toxicologist with a range of normal or expected values for selected hematology and serum chemistry parameters obtained at various intervals in studies of up to 150 weeks of duration. Different analytical methods, as well as environmental and technique-related variables, can greatly influence the values obtained for a particular parameter (1-3). For these reasons, the data included in this publication are for informational purposes only and are not intended for conclusive interpretation of any toxicological findings. While this information may be helpful in explaining a particular finding in a study, it is not meant as a substitute for an institution’s in-house historical control data or for the concurrent control data from the study in question (1-3).