Sarcoidosis is an inflammatory disease characterized by non-caseating granulomas in the absence of other autoimmune processes, infectious diseases, or foreign agents. The etiology of sarcoidosis is not completely understood. Several organ systems can be affected, of which the most frequently involved include the lungs and lymph nodes. Intra-abdominal sarcoidosis is less common, but can be found in the absence of pulmonary or lymphatic disease. Intra-abdominal sarcoidosis is most often asymptomatic. However, long-standing unrecognized disease can result in life-threatening complications. The identification, monitoring and prevention of these complications will be discussed, with emphasis on both clinical and histological presentations of intra-abdominal sarcoidosis.
Hepatitis C virus (HCV) hepatitis, initially termed non-A, non-B hepatitis, has become one of the leading causes of cirrhosis and hepatocellular carcinoma worldwide. With the help of animal models, our understanding of the virus has grown substantially from the time of initial discovery. There is a paucity of available animal models for the study of HCV, mainly because of the selective susceptibility limited to humans and primates. Recent work has focused modification of animals to permit HCV entry, replication and transmission. In this review, we highlight the currently available models for the study of HCV including chimpanzees, tupaia, mouse and rat models. Discussion will include methods of model design as well as the advantages and disadvantages of each model. Particular focus is dedicated to knowledge of pathophysiologic mechanisms of HCV infection that have been elucidated through animal studies. Research within animal models is critically important to establish a complete understanding of HCV infection, which will ultimately form the basis for future treatments and prevention of disease.
Our findings support recent guidelines encouraging unrestricted diets >1 day before colonoscopy if using a split-dose bowel regimen. Furthermore, we found no evidence to restrict dietary fiber 1 day before colonoscopy. We also found evidence to promote consumption of gelatin and avoidance of red meat, poultry, and vegetables 1 day before colonoscopy.
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