Question

A 47-year-old man complains of fever, headache, myalgia, malaise, and lack of appetite, with gastroenteritis that has persisted for more than a week. Gram-neg, oxidase-neg, non-lactose fermenting, hydrogen sulfide producing bacilli were isolated from the stool. Which of the following distinguishes this bacterial infection from other enterobacterial causes of gastroenteritis?

a. Invasion of M cells b

. Adherence to intestinal lining

c. Release of endotoxin

d. Colonization of gall bladder

e. Toxin production activating adenylate cyclase

Answer 1

The patient is infected with salmonella typhi.

Salmonella typhi is Gram-neg, oxidase-neg, non-lactose fermenting, hydrogen sulfide producing bacilli.

The patient is suffering from typhoid.

Salmonella typhi have the ability to invade and form colonies in gall bladder.

So the answer is (D) colonization of gall bladder.