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Microbiology 22

An 88-year-old woman is brought to the clinic by nursing home facility personnel for follow up after a recent hospitalization. She was being treated for a poorly healing wound on the medial side of her right fifth metatarsal-phalangeal joint. She has had a cough for the past 3 days. She has a history of severe dementia, type 2 diabetes, and aspiration pneumonia. She has received 3 courses of intravenous antibiotics in the past 6 months. She is admitted to the hospital and sputum culture is obtained. The sputum culture grows Klebsiella pneumoniae.

Which of the following best describes Klebsiella pneumoniae?

  • A) A gram-negative, encapsulated rod that is resistant to extended spectrum beta-lactams (ESBLs) that is found with other organisms
  • B) A gram-negative rod living in amoebae, with alveolar fibrinopurulent exudate
  • C) A gram-positive coccus in clusters which is resistant to methicillin and that may give rise to pneumatoceles
  • D) An acid-fast bacillus with Ghon complexes
  • E) An obligate intracellular bacterium with a biphasic life cycle that creates inflammation primarily in the interstitium


Shana Zucker


Dr. Ted O'Connell

Last updated

Jun 06, 2024


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