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Shewanella putrefaciens: An Emerging Cause of Nosocomial Pneumonia

Saad Ullah1, Hassan Mehmood1, Nawja Pervin2

  • 1Temple University/Conemaugh Memorial Medical Center, Johnstown, PA, USA.

Journal of Investigative Medicine High Impact Case Reports
|May 26, 2018
PubMed

Insights

This case study details a rare instance of Shewanella pneumonia in an elderly patient. The infection proved resistant to standard cefepime treatment, highlighting challenges in managing gram-negative bacterial pneumonia.

Area of Science:

  • Infectious Diseases
  • Critical Care Medicine
  • Microbiology

Background:

  • Gram-negative infections pose a significant and growing threat in healthcare settings.
  • Multidrug-resistant organisms exacerbate the challenge of treating gram-negative bacterial infections.
  • Nosocomial bloodstream infections in US intensive care units are frequently caused by gram-negative species, accounting for approximately 30%.

Purpose of the Study:

  • To report a rare case of Shewanella pneumonia in an elderly patient.
  • To document the first reported case of bacteremia secondary to Shewanella putrefaciens pneumonia.
  • To highlight the treatment challenges associated with Shewanella pneumonia.

Main Methods:

  • Case report of an 84-year-old Caucasian male.
  • Diagnosis of Shewanella pneumonia.
  • Treatment with cefepime.
  • Clinical outcome assessment.

Main Results:

  • The patient presented with Shewanella pneumonia.
  • Treatment with cefepime resulted in minimal to no clinical improvement.
  • This represents the third reported case of Shewanella putrefaciens nosocomial pneumonia.
  • This is the first reported case of bacteremia secondary to Shewanella putrefaciens pneumonia.

Conclusions:

  • Shewanella putrefaciens can cause severe nosocomial pneumonia and bacteremia.
  • Treatment of Shewanella pneumonia may require alternative antimicrobial strategies beyond standard cefepime.
  • Further research is needed to understand optimal treatment for Shewanella infections.
Keywords:
Shewanella algaeShewanella putrefaciensnosocomial pneumonia

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