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The mechanisms behind vaccine-induced strain replacement in the pneumococcus remain poorly understood. There is emerging evidence that distinct pneumococcal lineages can co-colonise for significant time periods, and that novel recombinants can readily emerge during natural colonisation. Despite this, patterns of post-vaccine replacement are indicative of competition between specific lineages. Here, we develop a multiscale transmission model to investigate explicitly how within host dynamics shape observed ecological patterns, both pre- and post-vaccination. Our model framework explores competition between and within strains defined by distinct antigenic, metabolic and resistance profiles. We allow for strains to freely co-colonise and recombine within hosts, and consider how each of these types may contribute to a strain's overall fitness. Our results suggest that antigenic and resistance profiles are key drivers of post-vaccine success.
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http://dx.doi.org/10.1371/journal.pcbi.1011755 | DOI Listing |
Chem Biodivers
September 2025
Department of Clinical Pharmacy, College of Pharmacy, University of Sulaimani, Sulaimani, Iraq.
The global rise in antibiotic resistance demands the urgent development of new antibacterial agents. This study investigated the antibacterial potential of four synthesized methoxy and thiophene chalcone derivatives (designated 3a, 4a, 3b, and 4b) against clinically relevant bacterial pathogens. These compounds were prepared through Claisen-Schmidt condensation, while their chemical structures were verified through applying Fourier-transform infrared, mass spectrometry, H nuclear magnetic resonance (NMR), and C NMR.
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September 2025
Department of Biotechnology, Yeungnam University, Gyeongsan, Gyeongbuk, Republic of Korea.
One of the most significant problems facing the scientific community in the 21st century is diabetes mellitus. There is an urgent need to create new powerful compounds that can fight this terrible disease because the number of instances of diabetes and drug-resistant diabetes is rising. We have synthesized a novel series of thiazole-derived thiadiazole-based Schiff base derivatives (1-10) in an effort to identify potential antidiabetic agents.
View Article and Find Full Text PDFMicrob Genom
September 2025
National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Zhunan, Taiwan, ROC.
remains a leading respiratory pathogen for children and the elderly. In Taiwan, a national PCV13 catch-up vaccination programme for children began in March 2013. This study investigates the population structure and antimicrobial profiles of pneumococcal isolates in Taiwan from 2006 to 2022.
View Article and Find Full Text PDFBackground: A significant surge in pertussis cases since early 2023 has raised serious public health concerns. To investigate the potential mechanisms contributing to this increased prevalence, we collected throat swab specimens from children exhibiting pertussis symptoms and conducted detailed molecular characterization.
Methods: All Bordetella pertussis (B.
CNS Drugs
September 2025
Global Health Neurology Lab, Sydney, NSW, 2150, Australia.
Acute ischemic stroke (AIS) remains a leading cause of mortality and long-term disability globally, with survivors at high risk of recurrent stroke, cardiovascular events, and post-stroke dementia. Statins, while widely used for their lipid-lowering effects, also possess pleiotropic properties, including anti-inflammatory, endothelial-stabilizing, and neuroprotective actions, which may offer added benefit in AIS management. This article synthesizes emerging evidence on statins' dual mechanisms of action and evaluates their role in reducing recurrence, improving survival, and mitigating cognitive decline.
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