Raw poultry can carry Salmonella or Campylobacter bacteria, both of which produce toxins that can cause serious diarrhea, among other symptoms. Aside from the discomfort, why does such an infection require immediate medical attention?
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Raw poultry can carry Salmonella or Campylobacter bacteria, both of which produce toxins that can cause serious diarrhea, among other symptoms. Aside from the discomfort, why does such an infection require immediate medical attention?
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- Why does Helicobacter pylori cause ulceractions in the lining of the Stomach? 1)The microbes secrete a toxin that prevents the host from detecting invasion of the microbe and thus allows it to thrive in the stomach and damage the host cells. 2)After invasion of the microbe in the cells lining the stomach, they are no longer able to produce mucous to protect the host cells from acid erosion 3)The microbe produces an enzyme that causes the cell to produce potent digestive enzymes that erode the stomach lining. 4)Once the microbe has entered the stomach, it releases digestive enzymes that degrade the mucous secreting cells.Which of the following bacterial species is considered normal flora of the mouth? O 1) Streptococcus mutans 2) Escherichia coli 3) Klebsiella pneumoniae 4) Staphylococcus epidermidisWhich 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.
- 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?This pathogen is usuall foodborne and causes a mostly asymptomic disease. The most common foods associated with it are deli meats and unpasteurized dairy products. It rarely cause meningitis and spsis. It is mainly of concern because it can lead to still birth. This pathogen is a) Stahylococcus aureus b) Streptococci pneumoniae c) Listeria monocytogens d) Streptocpccus pyogenesAll of the following pertain to listeriosis, except 1) intrauterine infection usually results in fetal death. 2) enterotoxin of the organism causes symptoms. 3) it causes a serious septicemia and meningitis in the elderly, immunocompromised, and infants. U 4) it causes symptoms of fever, diarrhea, and sore throat. 5) adequate pasteurization and thorough cooking of food can improve prevention.
- Explain how the body (including cells, organs, organ systems) is affected by the bacterium called Neisseria meningitidis? Are there any long-term effects caused by the bacterium, even after recovery?Mutant strains of Helicobacter pylori that lack the ability to produce urease fail to cause infection when they are swallowed. Infection occurs, however, if a tube is used to introduce them directly into the layer of mucus that overlies the stomach epithelium. What does this imply about the role of urease in the bacterium’s pathogenicity?Which of the following statements about Pasteurella multocida is false?a) Infections generally respond to a penicillin.b) It can cause epidemics of fatal disease in domestic animals.c) It is commonly found in the mouths of biting animals, including humans.d) A vaccine is used to prevent P. multocida disease in people.e) Cat bites are more likely to result in P. multocida infections than dog bites.
- What part of the Escherichia coli cell contains endotoxin?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.The general public takes for granted the link between an infectious agent and a given infection Discuss the requirements established by Koch, the nineteenth-century German scientist, before ascertaining, for instance, that Helicobacter pylori bacterium is the cause of the gastric ulcer. Why is it so essential to meet these conditions?