How deadly is seasonal influenza associated pneumonia? The German Competence Network for Community-acquired pneumonia (CAPNETZ).
Summary of "How deadly is seasonal influenza associated pneumonia? The German Competence Network for Community-acquired pneumonia (CAPNETZ)."
The emergence of new influenza virus subtypes has rekindled the interest in the clinical course and outcome of patients with influenza-associated pneumonia. Based on prospective data from 5032 patients with CAP included in the German CAP-Competence Network (CAPNETZ), we studied the incidence, clinical characteristics, and outcome of patients with influenza-associated CAP and compared these to patients without influenza. Diagnosis relied on a positive PCR for influenza in throat washings. 160 patients with influenza-associated CAP were identified (3,2% of total population, 12% of those with defined etiology). 34 patients (21%) with seasonal influenza had a concomitant pathogen (mostly S. pneumoniae). Patients with influenza associated CAP were significantly older, had been less often vaccinated, and had less often preceding antibacterial treatment. Thirty-day mortality was low (4.4%), not different to that of patients with pneumonia caused by bacterial (6.2%) or viral other than influenza pathogen (4%). Patients with influenza plus a bacterial pathogen (mixed influenza-associated pneumonia) had a higher mortality than those with pure influenza associated pneumonia (9% vs 3.2%). Mortality was higher in patients with mixed as compared to pure influenza associated pneumonia. However, we could not observe any excess mortality in patients with influenza associated pneumonia.
Ulm University Hospital Germany.
This article was published in the following journal.
Name: The European respiratory journal : official journal of the European Society for Clinical Respiratory Physiology
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/20817703
- DOI: http://dx.doi.org/10.1183/09031936.00037410
Medical and Biotech [MESH] Definitions
Influenza B Virus
Species of the genus INFLUENZAVIRUS B that cause HUMAN INFLUENZA and other diseases primarily in humans. Antigenic variation is less extensive than in type A viruses (INFLUENZA A VIRUS) and consequently there is no basis for distinct subtypes or variants. Epidemics are less likely than with INFLUENZA A VIRUS and there have been no pandemics. Previously only found in humans, Influenza B virus has been isolated from seals which may constitute the animal reservoir from which humans are exposed.
Hemagglutinin Glycoproteins, Influenza Virus
Membrane glycoproteins from influenza viruses which are involved in hemagglutination, virus attachment, and envelope fusion. Fourteen distinct subtypes of HA glycoproteins and nine of NA glycoproteins have been identified from INFLUENZA A VIRUS; no subtypes have been identified for Influenza B or Influenza C viruses.
Influenza In Birds
Infection of domestic and wild fowl and other BIRDS with INFLUENZA A VIRUS. Avian influenza usually does not sicken birds, but can be highly pathogenic and fatal in domestic POULTRY.
Pneumonia due to aspiration or inhalation of various oily or fatty substances.
Pneumonia caused by infection with bacteria of the family RICKETTSIACEAE.
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