Cited by 290Influenza Virus Research StudiesRespiratory viral infections researchPneumonia and Respiratory Infections

Respiratory viruses predisposing to bacterial infections: role of neuraminidase.

PELTOLA, VILLE T., MCCULLERS, JONATHAN A.·2004·Pediatric Infectious Disease Journal

Abstract

BACKGROUND AND METHODS: Viral-bacterial coinfections in humans are well-documented. Viral infections often lead to bacterial superinfections. In vitro and animal models for influenza, as well as molecular microbiology study of viruses and bacteria, provide an understanding of the mechanisms that explain how respiratory viruses and bacteria combine to cause disease. This article focuses on viral and bacterial combinations, particularly synergism between influenza and Streptococcus pneumoniae. RESULTS: Potential mechanisms for synergism between viruses and bacteria include: virus destruction of respiratory epithelium may increase bacterial adhesion; virus-induced immunosuppression may cause bacterial superinfections; and inflammatory response to viral infection may up-regulate expression of molecules that bacteria utilize as receptors. Influenza and parainfluenza viruses possess neuraminidase (NA) activity, which appears to increase bacterial adherence after viral preincubation. Experimental studies demonstrate that viral NA exposes pneumococcal receptors on host cells by removing terminal sialic acids. Other studies show that inhibition of viral NA activity reduces adherence and invasion of S. pneumoniae, independently of effects on viral replication. Clinical studies reveal that influenza vaccination reduces the incidence of secondary bacterial respiratory tract infections. CONCLUSIONS: Detection of viral factors (e.g. high NA activity) that increase the likely potential of epidemic/pandemic influenza strains for causing morbidity and mortality from secondary bacterial infections provides new possibilities for intervention. Additional study is needed to identify the mechanisms for the development of bacterial complications after infections with respiratory syncytial virus and other important respiratory viruses that lack NA activity. Prevention of bacterial superinfection is likely to depend on effective antiviral measures.

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Crossref · 10.1097/01.inf.0000108197.81270.35

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Authors
PELTOLA, V. T., & MCCULLERS, J. A.
Affiliations
St. Jude Children's Research Hospital (US)
Venue
Pediatric Infectious Disease Journal
Published
2004-01
Volume
23
Issue
1
Pages
S87-S97
ISSN
0891-3668 (ISSN-L)
OpenAlex
W2062927945
Cited by
290
References
99
Citations by year
2026: 1 · 2025: 5 · 2024: 4 · 2023: 12 · 2022: 10 · 2021: 10 · 2020: 9 · 2019: 10 · 2018: 9 · 2017: 9 · 2016: 13 · 2015: 16 · 2014: 29 · 2013: 23 · 2012: 22
FWCI
9.34
Type
journal article
Language
en
Open access
closed
Locations
  • The Pediatric Infectious Disease Journal (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • American Lebanese Syrian Associated Charities
  • National Institutes of Health (1k08ai049178-01)
  • National Cancer Institute (CA21765, P30CA021765)
  • National Institute of Allergy and Infectious Diseases (AI-54802, AI-49178, R21AI054802)
Topics
  • Health Sciences › Medicine › Epidemiology › Influenza Virus Research Studies
  • Health Sciences › Medicine › Epidemiology › Respiratory viral infections research
  • Health Sciences › Medicine › Epidemiology › Pneumonia and Respiratory Infections
Keywords
viral-bacterial coinfection, secondary bacterial infection, neuraminidase, influenza virus, Streptococcus pneumoniae, sialic acid, bacterial adhesion, respiratory syncytial virus, parainfluenza virus, influenza vaccination, respiratory epithelium
MeSH terms
Animals, Anti-Bacterial Agents, Antiviral Agents, Bacterial Infections, Disease Models, Animal, Dogs, Female, Male, Neuraminidase, Orthomyxoviridae, Prognosis, Respiratory Tract Infections, Streptococcus pneumoniae, Virus Diseases, Superinfection, Causality, Treatment Outcome, Risk Assessment, Mice

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