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Pneumonia Caused by Three Separate Microorganisms Simultaneously in a Patient Infected with Human Immunodeficiency

Sohaip Kabashneh1, Samer Alkassis1, Hammad Ali1

  • 1Internal Medicine, Wayne State University, Detroit Medical Center, Detroit, USA.

Cureus
|May 30, 2020
PubMed

Insights

Community-acquired pneumonia (CAP) can involve multiple pathogens in immunocompromised individuals, particularly those with human immunodeficiency virus (HIV). Prompt diagnosis and broad-spectrum treatment are crucial when initial therapies fail.

Area of Science:

  • Infectious Diseases
  • Immunology
  • Pulmonology

Background:

  • Community-acquired pneumonia (CAP) is typically caused by a single pathogen, with Streptococcus pneumoniae being the most frequent.
  • Immunocompromised patients, especially those with human immunodeficiency virus (HIV), are at higher risk for atypical pneumonia presentations.
  • Standard diagnostic approaches may not identify all causative agents in complex cases.

Observation:

  • A previously healthy 29-year-old male presented with acute CAP and tested positive for HIV.
  • Initial diagnostics suggested Streptococcus pneumoniae, but the patient failed to respond to appropriate anti-pneumococcal therapy.
  • Clinical deterioration necessitated mechanical ventilation due to hypoxic respiratory failure.

Findings:

  • Bronchoalveolar lavage fluid revealed co-infection with Pneumocystis pneumonia and methicillin-resistant Staphylococcus aureus (MRSA).
  • This case highlights the potential for polymicrobial infections in HIV-positive patients with CAP.
  • Treatment failure for an initially identified pathogen should prompt investigation for additional or alternative causative organisms.

Implications:

  • Clinicians should maintain a high index of suspicion for multiple pathogens in immunocompromised patients presenting with CAP.
  • Diagnostic workups should be comprehensive, considering a broader range of opportunistic and resistant organisms.
  • Treatment strategies may need to be adjusted to target polymicrobial infections effectively in this vulnerable population.
Keywords:
balbronchoscopycommunity-acquired pneumoniahivpneumococcal bacteremia

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