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Short, plain-English explanations of published research: what we asked, what we found, what the results mean, and what they do not show.
Three New Zealand case studies show that pieces of DNA that can move within and between bacteria can reveal how resistance emerges, how outbreaks are linked, and how successful strains change over time.
Read the plain-English summary →A 15-month research pilot at Wellington Regional Hospital found a highly diverse Klebsiella pneumoniae population rather than evidence of one strain spreading between patients. The work combined onsite sequencing at Awanui Labs Wellington with sequencing oversight, bioinformatics and genomic analysis from PHF Science.
Read the plain-English summary →New Zealand has never licensed colistin for use in food-producing animals, yet mobile colistin-resistance genes occur in clinical bacteria here. By resolving New Zealand genomes and comparing them with 1,543 mcr-carrying plasmids from around the world, we found that resistance is tied to globally successful plasmid backbones, not simply to where colistin is being used.
Read the plain-English summary →In a German hospital ward, repeated carbapenem resistance was not explained by one bacterial strain alone. Long-read sequencing found a persistent Citrobacter freundii lineage alongside closely related plasmids carrying resistance across different bacterial species and between patient and drain samples.
Read the plain-English summary →The public-health investigation showed where the Hutt Valley outbreak was propagating. Complete genomes then showed something different: how the resistance itself was moving. The outbreak clone carried blaOXA-48 on a tiny Col156 plasmid, while global comparisons showed the same resistance gene occurring across different plasmids, bacterial hosts and even chromosomes.
Read the plain-English summary →When a cluster of OXA-48-producing Escherichia coli appeared in Hutt Valley, hospital transmission was an obvious possibility. But the patients did not share a common ward or service. Interviews, food-handler screening and whole-genome sequencing instead pointed to a community food premises as an important setting in the outbreak.
Read the plain-English summary →Four bloodstream infections in a neonatal intensive care unit initially appeared to involve Klebsiella pneumoniae with wild-type antimicrobial susceptibility. Within 48 hours, local nanopore sequencing showed something different: three isolates were actually Klebsiella variicola, and two belonged to the same previously unseen sequence type. Further investigation connected the outbreak cluster to two more infants and two hospital sink traps.
Read the plain-English summary →A prospective nanopore sequencing system detected an MRSA outbreak in a neonatal intensive care unit just 13 days after the first positive culture, when only two cases were known. Ward screening then found six additional colonized infants, and infection-control measures were instituted while the outbreak was still developing.
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