The listeriosis outbreak during 2017 and 2018 in South Africa was attributed to the consumption of deli products such as polony and viennas. In your view, what possible factors attributed to the
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The listeriosis outbreak during 2017 and 2018 in South Africa was attributed to the consumption
of deli products such as polony and viennas. In your view, what possible factors attributed to the
outbreak?
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- All 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.An outbreak of a vector borne disease along a river system in centrla Uganda has been identified, triggering a national alert. Patients present with complex neurological symptoms and flagellated parasites have been isolated from local animals. Based on the above information, what pathogen do you suspect might be the cause? And why? To control the outbreak, what treatments and interventions would be the most effective?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 pyogenes
- Students in our classes sometimes ask how it is possible for a singleenteric carrier to infect 1,000 people at a buffet or for a box turtle toexpose someone to food infection. We always suggest that they usetheir imagination. Provide a detailed course of events that would leadto these types of outbreaks.In 2005, J. Robin Warren and Barry J. Marshall shared theNobel Prize in Medicine for discovering the bacteriumHelicobacter pylori and for establishing experimental proofthat it plays a major role in gastritis and peptic ulcer disease.The story began when Warren, a pathologist, noticed thatbacilli were associated with the tissues taken from patientssuffering from ulcers. Look up the history of this case and describeWarren’s first hypothesis. What sorts of evidence did ittake to create a credible theory based on it?Describe the function of the major virulence factors expressed by Listeria monocytogenes that are important in invasion and cell to cell spread. thank you!
- Why might the Yersinia pestis from a patient with pneumonic plague be more dangerous than the same organism from fleas?In 2005 a typhoid outbreak in Delmas, South Africa, prompted the widespread testing of food andwater sources to ascertain the origin of the outbreak. However, the origin of the outbreak couldnot be definitively traced. In your view, what could have been the possible reasons for this state ofaffairs?in your own words, what is the accuracy of claims about chron's disease being impacted by our gut microbiota
- Which of the following is NOT true of bacterial exotoxins? 1. Important in the pathogenesis of many human diseases 2. Their toxic effect can be systemic, affecting cells distant from the primary site of infection 3. None of the other four answers (All are true of bacterial exotoxins) 4. Different exotoxins may affect different types of cells (e.g., nerves, gastrointestinal mucosa) 5. Some exotoxins have two components, A (active) and B (binding)Compare the relative abundance of Actinobacteria in the microbiomeof a healthy adult’s intestinal tract to that in a healthy stomach (see Figure 41.18). Suggest a possibleexplanation for why the microbiome composition in the two organs is different even though theintestine and stomach are directly connected.Two microbiologists are writing a textbook, but they cannot agree where to place the discussion of botulism. One favored the chapter on nervous system infections, whereas the other insisted on the chapter covering digestive system infections. Where do you think the discussion should be placed, and why?
