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Differential visceral pain sensitivity and colonic morphology in four common laboratory rat strains

What is the central question of this study? Does stress sensitivity and susceptibility to inflammation innate to certain rat strains make them vulnerable to bowel dysfunction? What is the main finding and its importance? Of four different rat strains, the Lewis rat, which displays both susceptibility to gastrointestinal inflammation and sensitivity to stress, exhibits the most aberrant gastrointestinal morphology and visceral pain sensitivity. Given the similarities to human functional bowel disorders, such as irritable bowel syndrome, this may make it a good model of this disease.