micro Q2 - mohammed92120

[ArchivalUser]

An autopsy is performed on a man who suddenly began vomiting voluminous quantities of blood and exsanguinated.

Which of the following organisms is most likely implicated in the pathogenesis of this disease?

A. Cryptosporidium parvum
B. Entamoeba histolytica
C. Escherichia coli
D. Helicobacter pylori
E. Mycobacterium tuberculosis

[ArchivalUser]

d.?

[ArchivalUser]

yep good job bergkamp...
The correct answer is D

Perforation of a peptic ulcer is potentially fatal, because of either peritonitis with sepsis or sudden exsanguination (if the perforation damages one of the many arteries of the stomach). Peptic ulcer disease, gastritis, and possibly gastric carcinoma and gastric lymphoma have been strongly associated with Helicobacter pylori colonization of the mucus layer covering the gastric mucosa. Colonization is associated with destruction of the mucus layer, thereby destroying its protective function.

Cryptosporidium parvum (choice A) causes diarrhea that is severe in immunocompromised patients.
Entamoeba histolytica (choice B) produces dysentery-like symptoms or can cause liver abscess.

Escherichia coli (choice C) causes a variety of diarrheal diseases and can infect the bladder and soft tissues.

Mycobacterium tuberculosis (choice E) causes tuberculosis, characterized by granuloma formation, especially in the lungs.