Long Evans

Origin Originated by Drs. Long and Evans in 1915 by crossing several Wistar Institute white females with a wild gray male. To Charles River from Canadian Breeding Farm and Laboratories in 1978. Strain Code 006 Coat color White with black hood; occasionally white with ... more

CD Hairless

Origin This spontaneous mutation model was isolated from a Crl:CD(SD) colony in Charles River, in the late 1980s. Rederived in 1993 and subsequently transferred to Charles River, Raleigh, NC for barrier room production. The model does not exhibit the typical ... more

Wistar WU

Strain origin Selection by H.H. Donalson at the Wistar Instiute, USA, at the begining of 19th century. To Glaxo-Lab. In 1927, continued as inbred. To Nederlands-Instituut voor Volksfoending in 1933, to Unilever, Vlaardingen in 1941 and Institut Centraale Proefdierenbedrijf TNO in 1958. Hysterectomy rederived ... more


Origin To Scientific Products Farm, Ltd. [predecessor of Charles River United Kingdom (CRUK)] in 1947 from Wistar Institute. To Charles River in 1975 from CRUK. This particular colony was selected because of a low incidence of hydronephrosis. Strain code 003 Coat color White (albino) Research ... more

Wistar Han IGS

Origin Rederived by GlaxoWellcome from Han Wistar stock supplied by BRL. Transferred to Charles River UK in 1996. Transferred to Charles River in 1997 and rederived into isolator maintained Foundation Colony. IGS refers to animals bred using the Charles River ... more


Origin The original strain was composed in 1925 by Robert Worthington Dawley. Carworth Farms obtained it in 1955 and renamed it CFE (Carworth Farms Elias).Transferred to Charles River France in 1967, it then became known as OFA (Oncins France Strain ... more

Lister Hooded

Origin The exact origin of the Lister Hooded rat is obscure, but it was certainly maintained at the Lister Institute in the 1920s. It is not thought to be closely related to the Long Evans rat. This stock was developed at the Lister ... more