Genomic and immunocyte characterisation of bloodstream infection caused by Klebsiella pneumoniae.
Humans
Klebsiella pneumoniae
/ genetics
Klebsiella Infections
/ microbiology
Male
Female
Bacteremia
/ microbiology
Middle Aged
Aged
beta-Lactamases
/ genetics
Anti-Bacterial Agents
/ pharmacology
Microbial Sensitivity Tests
Whole Genome Sequencing
Serogroup
Genomics
Adult
Aged, 80 and over
Carbapenems
/ pharmacology
Klebsiella pneumoniae
B lymphocytes
Cytotoxic T lymphocytes
Virulence genes
Journal
Annals of clinical microbiology and antimicrobials
ISSN: 1476-0711
Titre abrégé: Ann Clin Microbiol Antimicrob
Pays: England
ID NLM: 101152152
Informations de publication
Date de publication:
20 Jun 2024
20 Jun 2024
Historique:
received:
04
04
2024
accepted:
18
06
2024
medline:
21
6
2024
pubmed:
21
6
2024
entrez:
20
6
2024
Statut:
epublish
Résumé
The aim of this study was to evaluate the characteristics of immunocyte associated with bloodstream infection (BSI) caused by Klebsiella pneumoniae (Kpn). Patients with BSI-Kpn were included from 2015 to 2022 in our hospital. Immunocyte subpopulations of enrolled BSI-Kpn patients were tested on the same day of blood culture using multicolor flow cytometry analysis. Antibiotic susceptibility test was determined by agar dilution or broth dilution method. All included isolates were subjected to whole genome sequencing and comparative genomics analysis. Clinical and genetic data were integrated to investigate the risk factors associated with clinical outcome. There were 173 patients with non-duplicate BSI-Kpn, including 81 carbapenem-resistant Kpn (CRKP), 30 extended-spectrum β-lactamases producing Kpn (ESBL-Kpn), 62 none CRKP or ESBL-Kpn (S-Kpn). Among 68 ST11-CRKP isolates, ST11-O2v1:KL64 was the most common serotypes cluster (77.9%, 53/68), followed by ST11-OL101: KL47 (13.2%, 9/68). Compared with CSKP group, subpopulations of immunocyte in patients with CRKP were significantly lower (P < 0.01). In patients with ST11-O2v1:KL64 BSI-Kpn, the level of cytotoxic T lymphocytes (CD3 + CD8 +) is the highest, while the B lymphocytes (CD3-CD19 +) was the least. In addition, the level of immunocyte in patients with Kpn co-harbored clpV-ybtQ-qacE were lower than that in patients with Kpn harbored one of clpV, ybtQ or qacE and without these three genes. Furthermore, co-existence of clpV-ybtQ-qacE was independently associated with a higher risk for 30-day mortality. The results demonstrate that patients with BSI-CRKP, especially for ST11-O2v1:KL64, exhibit lower leukomonocyte counts. In addition, BSI-Kpn co-harbored clpV-ybtQ-qacE is correlated to higher 30-day mortality.
Identifiants
pubmed: 38902832
doi: 10.1186/s12941-024-00721-3
pii: 10.1186/s12941-024-00721-3
doi:
Substances chimiques
beta-Lactamases
EC 3.5.2.6
Anti-Bacterial Agents
0
Carbapenems
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
56Subventions
Organisme : Zhejiang Provincial Natural Science Foundation of China
ID : LTGY24H190002
Informations de copyright
© 2024. The Author(s).
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