Klebsiella pneumonia is refers to a pneumonia resulting from an infection from the organism Klebsiella pneumoniae.
There tends to be a higher prevalance in older patients with alcoholism and debilitated hospitalised patients 3.
Klebsiella pneumoniae is amongst the most common Gram-negative bacteria encountered by physicians worldwide, and accounts for 0.5-5.0% of all cases of pneumonia 2. This organism can cause extensive pulmonary necrosis and frequent cavitation 1.
A helpful feature which may help to distinguish from pneumococcal pneumonia is that Klebsiella pneumonia develops cavitation in 30-50% of cases (in comparison, cavitation is rare in pneumococcal pneumonia). This occurs early and progresses quickly. Massive necrosis (pulmonary gangrene) is a recognised complication.
There can be variable features which can also depend on current other organisms. The spectrum includes
- ground glass opacities - considered relatively common 5
- consolidation - considered relatively common 5
- intralobular reticular opacities
- centrilobular nodules
- interlobular septal thickening
- pleural effusions
A necrotising pneumonia can occur as a complication 6.
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- 2. Okada F, Ando Y, Honda K et-al. Acute Klebsiella pneumoniae pneumonia alone and with concurrent infection: comparison of clinical and thin-section CT findings. Br J Radiol. 2010;83 (994): 854-60. Br J Radiol (full text) - doi:10.1259/bjr/28999734 - Free text at pubmed - Pubmed citation
- 3. E.Brant MW, A.Helms MC. The Brant and Helms Solution. Lippincott Williams &Wilkins. (2007) ISBN:B0011ZYZR2. Read it at Google Books - Find it at Amazon
- 4. Hansell DM. Imaging of Diseases of the Chest. Mosby Incorporated. (2009) ISBN:0723434964. Read it at Google Books - Find it at Amazon
- 5. Ono A. CHEST Journal. 2011;140 (4_MeetingAbstracts): . doi:10.1378/chest.1115498
- 6. Moon WK, Im JG, Yeon KM et-al. Complications of Klebsiella pneumonia: CT evaluation. J Comput Assist Tomogr. 1995;19 (2): 176-81. Pubmed citation