Klebsiella pneumonia has all of the following characteristics except:
**Core Concept**
Klebsiella pneumoniae is a gram-negative, rod-shaped bacterium that is a common cause of pneumonia and urinary tract infections. It is a member of the Enterobacteriaceae family and is known for its ability to produce virulence factors that contribute to its pathogenicity.
**Why the Correct Answer is Right**
Klebsiella pneumoniae is typically encapsulated, which helps it evade the host's immune system. The capsule is composed of polysaccharides and is essential for the bacterium's virulence. Additionally, Klebsiella pneumoniae is often resistant to multiple antibiotics, which can make treatment challenging. The bacterium can produce beta-lactamases, which confer resistance to penicillins and cephalosporins.
**Why Each Wrong Option is Incorrect**
**Option A:**
This option is incorrect because Klebsiella pneumoniae is indeed encapsulated and produces virulence factors that contribute to its pathogenicity.
**Option B:**
This option is incorrect because Klebsiella pneumoniae is a gram-negative bacterium, not gram-positive.
**Option C:**
This option is incorrect because Klebsiella pneumoniae is often resistant to multiple antibiotics, including carbapenems in some cases.
**Clinical Pearl / High-Yield Fact**
Klebsiella pneumoniae is a nosocomial pathogen that can be transmitted through contaminated medical equipment or the hands of healthcare workers. It is essential to follow proper infection control protocols to prevent the spread of this bacterium.
**Correct Answer:** D