Because so much biomedical research is undertaken in mice, many laboratories now have to incur the large extra costs of operating mouse colonies.

Mouse tissue was provided to Celera by the Jackson Laboratory of Bar Harbor, Me., a leading mouse colony.

Caesarian re-derivation of a mouse breeding colony is the most effective method to restore its health status.

His studies on mice were also cut short when German troops invaded the town of Nancy, where he kept his mouse colony.

It has only been seen in mouse colonies kept for research purposes.

"We have the biggest mouse colony in the United States," said Dr. Copeland, "and it takes a lot of money to run that."

Keeping mouse colonies is not cheap, so only lavishly funded researchers can afford their own mouse rooms.

The virus can be detected in mouse colonies worldwide, generally in suckling to young adult mice.

The effects of leptin were observed by studying mutant obese mice that arose at random within a mouse colony at the Jackson Laboratory in 1950.

By 15, he had an experimental mouse colony and hoped to become rich by creating a rodent poison using rare earth materials.