What role do viruses play in nosocomial pneumonia?

Abstract:

PURPOSE OF THE REVIEW:Viruses are an increasingly recognized cause of community-acquired pneumonia (CAP), but their exact role in nosocomial pneumonia is still debated. This review focuses on the role of viruses as a cause of nosocomial pneumonia. RECENT FINDINGS:Respiratory viruses may be responsible for healthcare-associated pneumonia, because affected patients and those with CAP have the same risk factors for viral disease. In mechanically ventilated patients, viruses belonging to the Herpesviridae family, namely herpes simplex virus (HSV) and cytomegalovirus, can be reactivated and cause bronchopneumonitis or ventilator-associated pneumonia, respectively. Recent results confirmed the high rate of HSV reactivation in the distal airways of mechanically ventilated patients, and that patients with high virus loads (>10(5)  copies/ml of bronchoalveolar lavage fluid) have poorer outcomes than those with low or no virus load. However, the responsibility of mimivirus, initially described as a possible cause of pneumonia, was not confirmed for nosocomial pneumonia. SUMMARY:Respiratory viruses are mainly responsible for CAP, but they may also cause healthcare-associated pneumonia. HSV bronchopneumonitis and cytomegalovirus pneumonia are not rare diseases, and patients with Herpesviridae lung infections have worse prognoses than those without. Whether or not those Herpesviridae infections are responsible for true morbidity or morbidity remains to be determined.

journal_name

Curr Opin Infect Dis

authors

Luyt CE,Bréchot N,Chastre J

doi

10.1097/QCO.0000000000000049

subject

Has Abstract

pub_date

2014-04-01 00:00:00

pages

194-9

issue

2

eissn

0951-7375

issn

1473-6527

journal_volume

27

pub_type

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