Scientists take a first step towards a universal pneumococcal vaccine using reverse vaccinology. The experimental vaccine ZPY-CpG-Ch showed 80-100% survival in mice against lethal S. pneumoniae serotypes, addressing serotype replacement and antibiotic resistance issues in current vaccines. However, it did not reduce upper respiratory carriage, meaning vaccinated mice can still spread infection.
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- ›Vaccine Formulation: ZPY-CpG-Ch (proteins Z, P, Y + CpG + chitosan)
- ›Reverse Vaccinology: Genome-based approach using 20,000 S. pneumoniae isolates, 1,300 common genes
- ›Target this Data: 80-100% survival against serotype 1 in mice
- ›Target this Concept: Reverse vaccinology (genome-based vaccine design)
- ›Target this Limitation: No reduction in upper respiratory carriage
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