Please identify the INCORRECT statement regarding bacterial diseases of the lower gastrointestinal system.
A) Cholera toxin-A-B toxin that causes intestinal cells to secrete HCl.
B) Of the four pathogenic strains of Shigella, S. dysenteriae is the most virulent.
C) Shiga toxin-producing E. coli may cause hemolytic uremic syndrome in an infected person.
D) There are more than 2,400 serotypes of Shigella, based on differences in their O, H, and K antigens.
E) Pseudomembranous colitis may develop in a person with Clostridium difficile infection.

Question

Please identify the INCORRECT statement regarding bacterial diseases of the lower gastrointestinal system.
A) Cholera toxin-A-B toxin that causes intestinal cells to secrete HCl.
B) Of the four pathogenic strains of Shigella, S. dysenteriae is the most virulent.
C) Shiga toxin-producing E. coli may cause hemolytic uremic syndrome in an infected person.
D) There are more than 2,400 serotypes of Shigella, based on differences in their O, H, and K antigens.
E) Pseudomembranous colitis may develop in a person with Clostridium difficile infection.

Quizplus · Accepted Answer

Cholera toxin is an A-B toxin that causes intestinal cells to secrete electrolytes and water, not HCl, but the statement regarding cholera toxin is not the one identified as incorrect. The incorrect statement is about the number of serotypes of Shigella; there are not more than 2,400 serotypes of Shigella. This number is more reflective of Salmonella serotypes. Shigella has far fewer serotypes.

Please Identify the INCORRECT Statement Regarding Bacterial Diseases of the Lower