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A team of Brazilian researchers has developed a simple test that can detect exposure to any of the four strains of dengue virus, as well as the Zika virus, as dengue cases continue to rise to a concerning degree in the region. The test was first validated with blood samples from mice experimentally infected with the viruses and then with hundreds of blood samples donated by people during the 2015-2017 Brazilian Zika epidemic. It uses technology that can be easily adapted for use in automated systems and rapid point-of-care tests and could serve as a key tool in the case of a Zika outbreak, allowing health care providers to test the immunity of at-risk groups while accounting for the possibility of cross-reactivity with antibodies produced after infection by dengue.
Last week, IAVI and Biofabri announced that the first doses of tuberculosis (TB) vaccine candidate MTBVAC have been administered in a critical large-scale Phase 2b trial testing the safety and efficacy of MTBVAC to prevent active TB lung disease in adolescents and adults. While there is a vaccine for TB, it is more than 100 years old and has limited efficacy in preventing pulmonary TB, the most common form in adults. A new vaccine could be a game changer in the global fight against this leading infectious disease. MTBVAC is also a single-shot vaccine, making it easier to administer in low-resource and remote settings, and the partners developing it are committed to ensuring that, if proven successful in further trials, there will be a sufficient, affordable supply in the places where it is most needed.
The Combating Antibiotic-Resistant Bacteria Biopharmaceutical Accelerator (CARB-X) last week announced a $2 million award to Immunethep to develop a vaccine against invasive strains of Escherichia coli. The funding will support work on a conjugate peptide-based vaccine candidate designed to induce immunity to E coli, which can cause serious, life-threatening infections that are becoming harder to treat with the rising prevalence of antimicrobial resistance. There are currently no vaccines for E coli. The candidate has demonstrated efficacy against E coli, as well as four other priority bacterial pathogens in animal models, and, if it continues to prove successful, could be a key tool for preventing serious bacterial infections in vulnerable populations.