Evidence map›Paper›PMID 25901797›Full record

ArticlePloS one2015

The importance of bacterial and viral infections associated with adult asthma exacerbations in clinical practice.

Motoyasu Iikura, Masayuki Hojo, Rikiya Koketsu, Sho Watanabe, Ayano Sato, Haruka Chino, Shoki Ro, Haruna Masaki, Junko Hirashima, Satoru Ishii and 7 more

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 55 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
55citing papers in PubMed, 3 pooled it
8.3field-weighted citation impact, top 2% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

55 citing papers in PubMed, 3 syntheses or guidelines pooled it, 105 citations in OpenAlex.

  1. Prevalence of respiratory viruses in stable and acute asthma: a systematic review and meta-analysis.European respiratory review : an official journal of the European Respiratory Society · 2026
    Pooled it
  2. Pooled it
  3. [Asthma and heroin use].Presse medicale (Paris, France : 1983)
    Pooled it
  4. Bacterial lysate add-on therapy to reduce exacerbations in severe asthma: A double-blind placebo-controlled trial.Clinical and experimental allergy : journal of the British Society for Allergy and Clinical Immunology · 2021
    Trial
  5. The PGDCommunications biology · 2026
    Article
  6. Review
  7. Airway mucus in infection.Frontiers in physiology · 2026
    Review
  8. Article
  9. Article
  10. Review
  11. Article
  12. Article
  13. Article
  14. Review
  15. Review
  16. Review
  17. Article
  18. Aerosolization inhalation of non-typeableFrontiers in microbiology · 2023
    Article
  19. Review
  20. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

17 authors at 3 institutions in 1 country.

Motoyasu IikuraDepartment of Respiratory Medicine, National Center for Global Health and Medicine, Tokyo, Japan.
Masayuki HojoDepartment of Respiratory Medicine, National Center for Global Health and Medicine, Tokyo, Japan.
Rikiya KoketsuDepartment of Respiratory Medicine, National Center for Global Health and Medicine, Tokyo, Japan.
Sho WatanabeDepartment of Respiratory Medicine, National Center for Global Health and Medicine, Tokyo, Japan.
Ayano SatoDepartment of Respiratory Medicine, National Center for Global Health and Medicine, Tokyo, Japan.
Haruka ChinoDepartment of Respiratory Medicine, National Center for Global Health and Medicine, Tokyo, Japan.
Shoki RoDepartment of Respiratory Medicine, National Center for Global Health and Medicine, Tokyo, Japan.
Haruna MasakiDepartment of Respiratory Medicine, National Center for Global Health and Medicine, Tokyo, Japan.
Junko HirashimaDepartment of Respiratory Medicine, National Center for Global Health and Medicine, Tokyo, Japan.
Satoru IshiiDepartment of Respiratory Medicine, National Center for Global Health and Medicine, Tokyo, Japan.
Go NakaDepartment of Respiratory Medicine, National Center for Global Health and Medicine, Tokyo, Japan.
Jin TakasakiDepartment of Respiratory Medicine, National Center for Global Health and Medicine, Tokyo, Japan.
Shinyu IzumiDepartment of Respiratory Medicine, National Center for Global Health and Medicine, Tokyo, Japan.
Nobuyuki KobayashiDepartment of Respiratory Medicine, National Center for Global Health and Medicine, Tokyo, Japan.
Sachiko YamaguchiLaboratory of Systems Biology, Center for Experimental Medicine and Systems Biology, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan.
Susumu NakaeLaboratory of Systems Biology, Center for Experimental Medicine and Systems Biology, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan; Precursory Research for Embryonic Science and Technology, Japan Science and Technology Agency, Saitama, Japan.
Haruhito SugiyamaDepartment of Respiratory Medicine, National Center for Global Health and Medicine, Tokyo, Japan.
National Center for Global Health and Medicine · JPJapan Science and Technology Agency · JPThe University of Tokyo · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundViral infection is one of the risk factors for asthma exacerbation. However, which pathogens are related to asthma exacerbation in adults remains unclear.

objectiveThe relation between various infections and adult asthma exacerbations was investigated in clinical practice.

methodsThe study subjects included 50 adult inpatients due to asthma exacerbations and 20 stable outpatients for comparison. The pathogens from a nasopharyngeal swab were measured by multiplex PCR analysis.

resultsAsthma exacerbations occurred after a common cold in 48 inpatients. The numbers of patients with viral, bacterial, or both infections were 16, 9, and 9, respectively. The dominant viruses were rhinoviruses, respiratory syncytial virus, influenza virus, and metapneumovirus. The major bacteria were S. pneumoniae and H. influenzae. Compared to pathogen-free patients, the patients with pathogens were older and non-atopic and had later onset of disease, lower FeNO levels, lower IgE titers, and a higher incidence of comorbid sinusitis, COPD, or pneumonia. Compared to stable outpatients, asthma exacerbation inpatients had a higher incidence of smoking and comorbid sinusitis, COPD, or pneumonia. Viruses were detected in 50% of stable outpatients, but a higher incidence of rhinovirus, respiratory syncytial virus, and metapneumovirus infections was observed in asthma exacerbation inpatients. H. influenzae was observed in stable asthmatic patients. Other bacteria, especially S. pneumoniae, were important in asthma exacerbation inpatients.

conclusionViral or bacterial infections were observed in 70% of inpatients with an asthma exacerbation in clinical practice. Infection with S. pneumoniae was related to adult asthma exacerbation.

Indexed as

AdultAgedAged, 80 and overAsthmaBacterial InfectionsComorbidityFemaleHumansMaleMiddle AgedNasopharynxPneumoniaPulmonary Disease, Chronic ObstructiveVirus Diseases

Identifiers

PMID25901797
PMCPMC4406689
OpenAlexW1998429300

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.