PAEA Surgery End Of Rotation (EOR) Practice Exam

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Which organism is known to invade the inner ear and enteric tissues?

Klebsiella
Staphylococcus aureus
Escherichia coli
Clostridium

The correct answer is: Klebsiella

Klebsiella is a genus of bacteria known for its ability to cause a variety of infections, particularly in immunocompromised individuals. One key aspect of Klebsiella is its association with both systemic infections and localized infections in various tissues. Specific strains of Klebsiella can invade not only the lungs, leading to pneumonia, but also the inner ear, potentially causing otitis, and it can infect enteric tissues, contributing to gastrointestinal issues. The other organisms listed do have pathogenic potential, but they are generally associated with different primary infection sites or types. Staphylococcus aureus is commonly linked to skin and soft tissue infections, along with various other conditions, but is not typically known for entering the inner ear or enteric tissues like Klebsiella. Escherichia coli primarily causes gastrointestinal infections and urinary tract infections, while Clostridium species are often involved in gastrointestinal diseases but do not have a significant association with invading the inner ear. Therefore, Klebsiella's versatility in affecting both the inner ear and enteric tissues makes it the correct choice in this context.