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- Which statement among A-E is false concerning digestive system and gastrointestinal (GI) tract infections? A) O The more severe forms of gastroenteritis, like dysentery, produce abdominal cramps, fever, and blood. B) ORehydration and electrolyte replacement are typically the treatment for those with GI tract infections. C) O Invasive GI tract infections are caused by intracellular pathogens such as Salmonella and certain E coli. D) O Among protozoal pathogens, Giardia is a major cause of gastroenteritis. E) O Most GI tract infections are due to viruses. F) OA-E are all correct.Compare the mechanism of virulence for Vibrio cholerae and enterotoxigenic E.coli. Specifically, how do these bacteria bind to host cells and what factors are involved in producing the diarrhea observed in infected patients?Which bacteria in the Family Enterobacteriaceae are true entericpathogens and which ones are opportunists?
- How can we prove the pathologic or clinical effects of V. cholerae are due only to the production of the enterotoxin by the pathogen? (hint: exclude endotoxin LPS)What virulence factors of each species of Enterobacteriaceae?Why do you think E. coli and other enteric organisms are common causes of UTIs?
- Explain the difference between enterotoxigenic, enteroinvasive, enteropathogenic, and enterohemorrhagic strains of E. coli.What is the normal habitat of enterococcus faecium? Provide an explanation for its recovery from urine.125. A 37-year-old man develops a recurrent episode of pseudomembranous colitis shortly after completing an initial course of oral metronidazole therapy. Which of the following best explains the recurrence? A) The bacterial strain can form spores that persist in the gastrointestinal tract B) Other gastrointestinal flora have degraded the metronidazole CC) The patient has an underlying gastrointestinal tract disorder OD) Systemic therapy is necessary to eradicate this infection