Spontaneously Hypertensive Rat
The colony began with animals selected for hypertension from a colony of Wistar rats. The colony is descended from animals originally developed in 1963 by Okamoto and Aoki. Through cesarean derivation, the animals were fostered onto rats in isolation. All colony histories contain some possiblity of inaccuracy. This information is provided to the best of Hilltop's knowledge.
Viral Antibody Profile
The coat color of the rat is albino. The rat is propagated using an outbred breeding system. The colonies, located at Hilltop Lab Animals, Inc., are closed colonies and have been so since 1985. Closed colonies develop qualities causing the rats to be uniquely suited to certain types of research.