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Introduction The appendix is a vestigial organ without proven significant physiological function; however, it is subject to a host of clinically significant inflammatory disorders, some of which involve the appendix exclusively and others that are systemic. The vermiform appendix arises…

Acknowledgment The author wishes to thank Dr. Laura W. Lamps for her work on prior editions of the chapter. Introduction Gastrointestinal (GI) infections are a major cause of morbidity and mortality worldwide. As the number of transplant patients and those…