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Differentiate among the major enteric pathologies seen among
various strains of E. coli.
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Escherichia coli is a coliform bacterium, that is part of the Enterobacteriaceae family. It is a normal inhabitant of the human intestine.
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- While it is true that not all coliforms are pathogenic under normal conditions, please name two situations that can occur due to infection by pathogenic strains.State the signifi cance of E. coli O157:H7.What are the causative agent mode of transmission and clinical symptoms of enteroaggregative E.coli (EAEC).
- 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.What are unique features in the epidemiology of E. coli O157:H7(STEC)?While it is true that not all coliforms are pathogenic under normal conditions, please name two situations that can occur due to infection by coliforms under abnormal conditions (when they are present where they are not supposed to be or when their numbers exceed acceptable levels)
- What are the common pathogens isolated from stool samples? What is the difference between a coliform bacterium and a noncoliform enteric bacterium? What diagnostic test differentiates Proteus and Providencia species from other Enterobacteriaceae? How would you differentiate between serotypes of E. coli? Are the gram-negative enteric bacilli fastidious organisms? Would they survive well outside of the body? If so, what significance would this have in their transmission? Why is serotyping particularly important in Salmonella infections and typhoid fever?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 infectionOne of the most common observations in many metabolic diseases is: An increase in the diversity of gut microbe species A decrease in general inflammation levels A decrease in the diversity of gut microbe species A specific causal link between a single bacterial species and a disease
- 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?What are the History, Characteristics, Epidemiology, and Virulence factors of Campylobacter jejuni and Campylobacter coli?What is the most common gram-negative bacteria that can cause UTI in adults (Note: Assume that the patient does not have other illnesses)?