ArticleNPJ vaccines2025
A multivalent capsule vaccine protects against Klebsiella pneumoniae bloodstream infections in healthy and immunocompromised mice.
Article in NPJ vaccines, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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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.
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Who cites it
5 citing papers in PubMed.
- RpoE-mediated virulence attenuation elicits protective immunity in hypervirulentEmerging microbes & infections · 2026Article
- Maternal vaccination with capsular polysaccharide bioconjugates protects against murineScience advances · 2026Article
- Cross-Serotype Protection of a PstS-YidR Fusion mRNA Vaccine Against Systemic Infection and Endogenous Endophthalmitis Caused by HypervirulentPathogens (Basel, Switzerland) · 2026Article
- Modular Development of aNanomaterials (Basel, Switzerland) · 2026Article
- Total synthesis of the capsular polysaccharide repeating unit towards the development of a glycoconjugate vaccine againstBeilstein journal of organic chemistry · 2026Article
Corrections and comments
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Authors and funding
9 authors.
Funding
Abstract
Klebsiella pneumoniae is a leading cause of nosocomial infections, bacteremia, and worldwide mortality. Further, a drastic rise in antibiotic-resistant isolates poses an urgent threat to humanity. Unfortunately, despite its clinical importance, a licensed K. pneumoniae vaccine is not yet available. Here, we report on the production and characterization of the broadest K. pneumoniae capsule bioconjugate vaccine to date. We tested this vaccine for its immunogenicity, functionality, efficacy, and antibody durability against a variety of K. pneumoniae isolates in a murine bacteremia model. We also established an immunocompromised murine model of bacteremia to better recapitulate human infection and tested our vaccine's efficacy in this background. The tetravalent capsule vaccine is highly immunogenic in mice, generating a robust immune response against all capsule types included (K1, K2, KL102, and KL107). Further, the generated antibodies persist for at least 6 months. The vaccine-induced antibodies are highly functional against a variety of clinical isolates of K. pneumoniae, including both classical and hypervirulent strains. Finally, the vaccine led to increased survival after bacteremia challenge compared to placebo-immunized mice. Our findings confirm that a capsule-based bioconjugate vaccine has clinical potential in preventing K. pneumoniae infections. These experiments signify much-needed progress towards a multivalent vaccine to combat this increasingly troublesome pathogen.
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Registered trials
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.