Thereis substantial genetic variation in the response of laboratory rats to xenobiotics, and this variation has important implications for toxicologic research and screening. However, most characteristics of toxicologic interest have a polygenic mode of inheritance so the variation is not immediately apparent to most investigators who use only a single stock or
Butin medieval Japan, having rats in the kitchen could suggest an entirely different meaning. Such is the case with "The Illustrated Rat's Tale" (Nezumi no sōshi emaki), an anonymous Japanese Humanshave been battling rats for eons, but during the pandemic the rats seemed to be winning. In 2021, reports of the rodents to New York City’s 311 help line were way above prepandemic levels