Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Profiling the nasopharyngeal Microbiome in patients with community-acquired pneumonia caused by Streptococcus pneumoniae : diagnostic challenges and ecological insights

Zubiria-Barrera, Cristina ; Yamba, Linda Yamba LU orcid ; Klassert, Tilman E ; Bos, Malena ; Ahl, Jonas LU ; Wasserstrom, Lisa LU orcid ; Slevogt, Hortense and Riesbeck, Kristian LU orcid (2025) In Medical microbiology and immunology 214(1).
Abstract

Community-acquired pneumonia (CAP) is a significant health threat for adults. Although conjugate vaccines have reduced pneumococcal CAP incidence in children, Streptococcus pneumoniae-related CAP remains prevalent among older adults. The nasopharynx acts as a reservoir for S. pneumoniae, yet the interplay between this pathogen and the nasopharyngeal microbiome during and after pneumonia remains poorly understood. This study included 61 adult patients diagnosed with pneumococcal CAP and 61 matched healthy controls. An S. pneumoniae-specific PCR, urine antigen tests and bacterial cultures were performed. Nasopharyngeal swabs collected at admission and three months post-infection were analyzed for microbiome dynamics through 16 S rRNA gene... (More)

Community-acquired pneumonia (CAP) is a significant health threat for adults. Although conjugate vaccines have reduced pneumococcal CAP incidence in children, Streptococcus pneumoniae-related CAP remains prevalent among older adults. The nasopharynx acts as a reservoir for S. pneumoniae, yet the interplay between this pathogen and the nasopharyngeal microbiome during and after pneumonia remains poorly understood. This study included 61 adult patients diagnosed with pneumococcal CAP and 61 matched healthy controls. An S. pneumoniae-specific PCR, urine antigen tests and bacterial cultures were performed. Nasopharyngeal swabs collected at admission and three months post-infection were analyzed for microbiome dynamics through 16 S rRNA gene amplicon sequencing. 16 S rRNA gene amplicon sequencing revealed Streptococcus spp. in the majority of all nasopharyngeal samples during infection compared to the other diagnostic test performed. While overall bacterial biomass did not differ between groups, patients exhibited higher alpha diversity (p = 0.012) and lower microbiome stability post-infection. Beta diversity analysis distinguished infection from healthy status (p = 0.002). Taxonomic analysis showed similar core microbiota across groups, but Streptococcus spp. was significantly more abundant during infection, particularly in those patients with viral co-infections. Notably, unique significant bacterial interactions were identified both during and after infection, as well as in healthy states. A negative correlation was observed between Corynebacterium and Streptococcus spp. in infected patients, suggesting a potential antagonistic interaction between these taxa. The nasopharyngeal microbiome in patients with pneumococcal CAP demonstrates persistent disruption post-infection, characterized by lower resilience three months after acute illness. Additionally, we identified specific bacterial interplays during and after infection that differed from those in healthy donors. These bacterial dynamics might play critical roles in pathogen colonization resistance and infection prevention. Thus, our findings highlight the need for further investigation into microbial interactions and potential microbiome-based therapies for respiratory infections, particularly in vulnerable populations.

(Less)
Please use this url to cite or link to this publication:
author
; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Humans, Nasopharynx/microbiology, Community-Acquired Infections/microbiology, Corynebacterium, Microbiota, Streptococcus pneumoniae/isolation & purification, RNA, Ribosomal, 16S/genetics, Pneumonia, Pneumococcal/microbiology, Microbiome, DNA, Bacterial/genetics, Community-Acquired Pneumonia
in
Medical microbiology and immunology
volume
214
issue
1
article number
19
publisher
Springer Science and Business Media B.V.
external identifiers
  • pmid:40208342
  • scopus:105002878212
ISSN
0300-8584
DOI
10.1007/s00430-025-00828-0
language
English
LU publication?
yes
additional info
© 2025. The Author(s).
id
031ce216-08fa-480d-b78b-ddd1301798a1
date added to LUP
2025-05-08 06:29:20
date last changed
2025-05-09 04:02:38
@article{031ce216-08fa-480d-b78b-ddd1301798a1,
  abstract     = {{<p>Community-acquired pneumonia (CAP) is a significant health threat for adults. Although conjugate vaccines have reduced pneumococcal CAP incidence in children, Streptococcus pneumoniae-related CAP remains prevalent among older adults. The nasopharynx acts as a reservoir for S. pneumoniae, yet the interplay between this pathogen and the nasopharyngeal microbiome during and after pneumonia remains poorly understood. This study included 61 adult patients diagnosed with pneumococcal CAP and 61 matched healthy controls. An S. pneumoniae-specific PCR, urine antigen tests and bacterial cultures were performed. Nasopharyngeal swabs collected at admission and three months post-infection were analyzed for microbiome dynamics through 16 S rRNA gene amplicon sequencing. 16 S rRNA gene amplicon sequencing revealed Streptococcus spp. in the majority of all nasopharyngeal samples during infection compared to the other diagnostic test performed. While overall bacterial biomass did not differ between groups, patients exhibited higher alpha diversity (p = 0.012) and lower microbiome stability post-infection. Beta diversity analysis distinguished infection from healthy status (p = 0.002). Taxonomic analysis showed similar core microbiota across groups, but Streptococcus spp. was significantly more abundant during infection, particularly in those patients with viral co-infections. Notably, unique significant bacterial interactions were identified both during and after infection, as well as in healthy states. A negative correlation was observed between Corynebacterium and Streptococcus spp. in infected patients, suggesting a potential antagonistic interaction between these taxa. The nasopharyngeal microbiome in patients with pneumococcal CAP demonstrates persistent disruption post-infection, characterized by lower resilience three months after acute illness. Additionally, we identified specific bacterial interplays during and after infection that differed from those in healthy donors. These bacterial dynamics might play critical roles in pathogen colonization resistance and infection prevention. Thus, our findings highlight the need for further investigation into microbial interactions and potential microbiome-based therapies for respiratory infections, particularly in vulnerable populations.</p>}},
  author       = {{Zubiria-Barrera, Cristina and Yamba, Linda Yamba and Klassert, Tilman E and Bos, Malena and Ahl, Jonas and Wasserstrom, Lisa and Slevogt, Hortense and Riesbeck, Kristian}},
  issn         = {{0300-8584}},
  keywords     = {{Humans; Nasopharynx/microbiology; Community-Acquired Infections/microbiology; Corynebacterium; Microbiota; Streptococcus pneumoniae/isolation & purification; RNA, Ribosomal, 16S/genetics; Pneumonia, Pneumococcal/microbiology; Microbiome; DNA, Bacterial/genetics; Community-Acquired Pneumonia}},
  language     = {{eng}},
  month        = {{04}},
  number       = {{1}},
  publisher    = {{Springer Science and Business Media B.V.}},
  series       = {{Medical microbiology and immunology}},
  title        = {{Profiling the nasopharyngeal Microbiome in patients with community-acquired pneumonia caused by Streptococcus pneumoniae : diagnostic challenges and ecological insights}},
  url          = {{http://dx.doi.org/10.1007/s00430-025-00828-0}},
  doi          = {{10.1007/s00430-025-00828-0}},
  volume       = {{214}},
  year         = {{2025}},
}