Microbiology Quiz #24, Salmonella and Shigella  

1. A 25-year-old male presents with high fever, headache, abdominal pain, and rose spots on his abdomen. He recently returned from a trip to South Asia. Blood cultures grow a Gram-negative bacterium. Which of the following organisms is most likely responsible for this patient's condition? 

Question 1 of 5

2. Which of the following is a major virulence factor of Salmonella species that allows them to invade and replicate within host cells? 

Question 2 of 5

3. During an outbreak of diarrhea among a group of campers, an organism is isolated that does not ferment lactose and produces red colonies on Hektoen enteric agar. The bacterium is highly motile and invades M cells in the ileum. Which of the following organisms is most likely responsible? 

Question 3 of 5

4. A vaccine is available for the prevention of disease caused by which of the following organisms? 

Question 4 of 5

5. Which of the following is a characteristic feature of chronic carriers of Salmonella Typhi? 

Question 5 of 5


 

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