The Old Woman created a small gap in the Shaman's protective spell by causing rats to eat away the wood in the ceiling and exploited it.

Extracts containing these hormones caused female rats to become eager to accept the sexual attentions of the male of the species.

"We assess an entire group of blocks, and if we find the conditions that cause rats, we try to treat them right away."

Glaxo's leaders like to dwell on the problems with Losec - namely that in some tests it caused rats to develop tumors.

Construction projects can cause rats to flee to neighboring areas, according to Mr. Putnam.

I could feel the uneasiness, bordering on panic-and had the thought that it wasn't fear of fever or ague that had caused the servants to leave, but more likely that sense of self-preservation that causes rats to flee a sinking ship.

A recent study has shown that an increase in BDNF, brain-derived neurotrophic factor, in the ventral tegmental area (VTA) in rats can cause opiate-naive rats to begin displaying opiate-dependent behavior, including withdrawal and drug-seeking behavior.

After the future version of Donatello exterminated most of the world's rat population, in a future where floods following global warming causing rats to enter the houses in the towns, the Rat King declares war on him and his allies for killing so many of his "children".

Anti-Coagulant Poison The poison being used is Bromadiallone, Mr. Matsil said, an anti-coagulant that interferes with blood clotting, causing rats to die of internal hemorrhaging in seven to 10 days.

Rats, like other animals, had developed resistance to conventional poisons; then an anticoagulant called warfarin had been developed which caused rats to bleed internally and die.