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Our study investigated microbial dynamics involved in the relative enrichment of oral bacteria in faeces. Results in mice and from human patients indicated that high percentages of oral bacteria reflect a depleted gut microbiota, with oral bacteria simply passing through rather than expanding in the gut, which has implications for gastrointestinal disease treatment.
We characterize the activity of fluorofolin, a potent inhibitor of dihydrofolate reductase, against Pseudomonas aeruginosa. By exploiting a divergence in thymidine metabolism, fluorofolin becomes selective for P. aeruginosa in the presence of thymine, demonstrating that it can be a narrow-spectrum antibiotic for this bacterial pathogen.
Characterizing bacterial responses to mixtures of chemical pollutants reveals interactive effects among pollutants. Our study highlights the predictability and resilience of microbial responses to complex mixtures of pollutants, offering the potential for improvements in ecotoxicological assessments.
Human norovirus infection is a major global health concern, but a suitable animal model is lacking. We have established repeated infection with human norovirus in rhesus macaques via oral challenge. Animals demonstrate virus shedding in the stool and subsequent serum antibody responses, and virus replication is detected in the small intestine.
Cases of Buruli ulcer in southeastern Australia have increased over the past 10 years. Native possums are a reservoir for Mycobacterium ulcerans (the cause of Buruli ulcer), but the route of transmission to humans is unclear. Our findings identify mosquitoes as the vector of M. ulcerans from possums to humans.
