. Explain the role of H. pylori in the pathogenesis of peptic ulcers. Which populations are most susceptible to peptic ulcers? Is H. pylori normal flora? If so, what causes the species to become pathogenic?
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Q: Explain the importance of carbepenem-resistantEnterobacteriaceae infections and identify the…
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Q: Describe the evidence linking Helicobacter pylori togastric ulcers. How can these ulcers be cured?
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Q: What is the active substance and activity/indications (e.g. antibacterial, anti-inflammatory) of…
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Q: Describe the evidence linking Helicobacter pylori to gastric ulcers. How can these ulcers be cured?
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Q: Explain the role of pylori in the pathogenesis of peptic ulcers. Which populations are most…
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- 1. Describe the evidence linking Helicobacter pylori to gastric ulcers. How can these ulcers be cured?Describe how Balantidium coli invades the tissue. How is it different from invasion byEntamoeba histolytica? Describe the pathophysiology of a Entamoeba histolytica infection. Why are Giardia intestinalis and Dientamoeba fragilis difficult to diagnose? Illustrate and describe the typical life cycle of an intestinal amoeba.Describe the evidence linking Helicobacter pylori togastric ulcers. How can these ulcers be cured?
- 1. What is the active substance and activity/indications (e.g. antibacterial, anti-inflammatory) of okra or Abelmoschus esculentus?Which of these statements concerning the causative agent of listeriosis is false?a) It can cause meningitis during the first month of life.b) It is a Gram-positive rod that can grow in refrigerated food.c) It is usually transmitted by the respiratory route.d) Infection can result in bacteremia.e) It is widespread in natural waters and vegetation.Describe the virulence factors of H. pylori that allow it to colonize the stomach and survive phagocytosis.
- What might be a reason why a Buruli ulcer is initially painless? Why was it necessary to administer antibacterial drugs for two months rather than two weeks? What environmental similarities exist in the endemic countries?If there is a causal relationship between the presence of H. pylori and ulcers, how might you explain that 50% of the patients with a normal endoscopic examination were infected with the bacteria?All of the following are true about Clostridium tetani, thecausative agent of tetanus, EXCEPT:(a) They are spore-forming rods.(b) They are part of the normal bowel microflora of horses,cattle, and humans.(c) They produce a powerful exotoxin that mediates thedisease.(d) Their toxin elicits muscle stiffness, spasms, and paralysisin the victim.(e) They require oxygen to survive.
- Which of the following is NOT true about listeriosis?(a) Foodborne transmission is the most common source ofinfection.(b) It is a leading cause of bacterial meningitis today.(c) It is responsible for many cases of fetal damage and death.(d) It is sometimes acquired as a zoonosis.(e) Individuals with impaired immune systems are highlysusceptible to this disease.Which of the following statements about listeriosis is false?(a) The causative agent, Listeria monocytogens, can befound in many types of food .(b) When pregnant women are infected with Listeria mono-cytogens, the bacteria may cause fetal damage or death.(c) Bacteriophages can be used to eliminate Listeria oncontaminated food.(d) Infection with Listeria monocytogens rarely results inmeningitis.(e) Listeria L-forms lack cell walls and are able to persistinside of macrophages after phagocytosis.Describe the unusual metabolism of Helicobacter spp. and explain how H. pylori can tolerate the acidic conditions within the stomach