A microbiologist is reading a stool culture and notices a very moist and mucoid pink colony on MacConkey agar.What is the most likely organism?
A)Klebsiella pneumoniae
B)Escherichia coli
C)Proteus vulgaris
D)Acinetobacter

Question

Quizplus · Accepted Answer

K.pneumoniae is the most commonly isolated species and has the distinct feature of possessing a polysaccharide capsule.The capsule offers the organism protection against phagocytosis and antimicrobial absorption, thus contributing to its virulence.This capsule is also responsible for the moist, mucoid colonies characteristic of K.pneumoniae.

A Microbiologist Is Reading a Stool Culture and Notices a Very