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Community-acquired respiratory viruses (CARV) are increasingly recognized as causes of lower respiratory tract infections, not just upper ones. Early identification is crucial for effective treatment and antibiotic stewardship, especially in immunocompromised patients.

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Area of Science:

  • Medical Virology
  • Infectious Diseases
  • Pulmonology

Background:

  • Community-acquired respiratory viruses (CARV) were historically associated primarily with upper respiratory tract infections.
  • Emerging evidence highlights CARV as significant causative agents of lower respiratory tract infections.

Purpose of the Study:

  • To review the epidemiological and clinical significance of viruses causing lower respiratory tract infections.
  • To emphasize the importance of recognizing viral etiologies in lower respiratory tract infections.

Main Methods:

  • Review of recent scientific literature and clinical studies.
  • Analysis of diagnostic implications of molecular testing for viral pathogens.
  • Examination of epidemiological data on community-acquired pneumonia and ICU admissions.

Main Results:

  • Advances in molecular diagnostics enable precise identification of viruses in clinical specimens.
  • Recent studies indicate viruses are the primary cause of most community-acquired pneumonia cases.
  • This represents a paradigm shift in understanding pneumonia etiology.

Conclusions:

  • Accurate viral diagnosis impacts therapeutic strategies and antibiotic stewardship.
  • Awareness of viral lower respiratory tract infections is critical, particularly in immunocompromised populations (e.g., solid organ transplant, hematologic malignancies).
  • Timely diagnosis prevents challenges in management and unnecessary antibiotic exposure.