Medical research

A potential agent for treating preeclampsia

Preeclampsia usually begins after the 20th week of pregnancy. The affected women suddenly develop high blood pressure, they excrete increased amounts of protein in their urine (called proteinuria)—a sign that the small ...

Medical research

Gut microbes influence how rat brains react to opioids

When Sierra Simpson was in college, she was sick for a year with recurring fevers and vomiting. Her doctors couldn't figure out what she had. Suspecting a bacterial infection, they tried treating her with high doses of antibiotics.

Overweight & Obesity

High-fat diet consequences include mental fatigue, researchers say

Obesity has been shown to place physical stress on the body, but new research suggests that excess weight may also cause mental fatigue. The research, originally slated for presentation at the APS annual meeting at Experimental ...

Medical research

What opioid use in rats can tell us about addiction in humans

In 2018, more than 47,000 Americans died from an opioid overdose, and ten million misused prescription opioids. The highly addictive drugs have destroyed lives and families, regardless of income level, race, age, or gender.

Medical research

Brain regions found in rats that drive stress response

A team of researchers at the Nagoya University Graduate School of Medicine in Japan has found what they describe as the central master driver of psychosocial stress responses in rats. In their paper published in the journal ...

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Rat

50 species

Stenomys Thomas, 1910

Rats are various medium-sized, long-tailed rodents of the superfamily Muroidea. "True rats" are members of the genus Rattus, the most important of which to humans are the black rat, Rattus rattus, and the brown rat, Rattus norvegicus. Many members of other rodent genera and families are also called rats and share many characteristics with true rats.

Rats are typically distinguished from mice by their size; rats are generally large muroid rodents, while mice are generally small muroid rodents. The muroid family is very large and complex, and the common terms rat and mouse are not taxonomically specific. Generally, when someone discovers a large muroid, its common name includes the term rat, while if it is small, the name includes the term mouse - scientifically, the terms are not confined to members of the Rattus and Mus genera. Compare the taxonomic classification of the Pack rat and Cotton mouse.

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