Publications by authors named "J Rayner"
Successful transmission of Plasmodium falciparum from one person to another relies on the complete intraerythrocytic development of non-pathogenic sexual gametocytes infectious for anopheline mosquitoes. Understanding the genetic factors that regulate gametocyte development is vital for identifying transmission-blocking targets in the malaria parasite life cycle. Toward this end, we conducted a forward genetic study to characterize the development of gametocytes from sexual commitment to mature stage V.
View Article and Find Full Text PDFObjective: The COVID-19 pandemic highlighted and exacerbated health inequities worldwide. While several studies have examined the impact of individual social factors on COVID infection, our objective was to examine how interactions of social factors were associated with the risk of testing positive for SARS-CoV-2 during the first two years of the pandemic.
Study Design And Setting: We conducted an observational cohort study using linked health administrative data for Ontarians tested for SARS-CoV-2 between January 1st, 2020, and December 31st, 2021.
Article Synopsis
- The audit aimed to assess and improve the completeness and accuracy of the National Joint Registry (NJR) dataset specifically for elbow arthroplasty surgeries.
- In a two-phase approach, Phase 1 compared NJR data with NHS England Hospital Episode Statistics (HES), identifying thousands of unmatched and inaccurate records, particularly for radial head arthroplasties (RHAs).
- Phase 2 involved collaboration among 142 NHS hospitals to correct and update records, resulting in an improved completeness of the NJR dataset from 63% to 93% and accuracy from 94% to 98%.
Activity programs are run by many nursing homes (also known as residential aged care facilities or long-term care facilities) however little is known about how activities are chosen or how well they meet the needs of residents. The aim of this study was to learn more about activity programs currently offered to older people living in nursing homes in Victoria, Australia. Interviews were undertaken with 13 activities/lifestyle staff working across six nursing homes.
View Article and Find Full Text PDFPurpose: The purpose of this work is to validate a simple and versatile integrated variable flip angle (VFA) method for mapping B in hyperpolarized MRI, which can be used to correct signal variations due to coil inhomogeneity.
Theory And Methods: Simulations were run to assess performance of the VFA B mapping method compared to the currently used constant flip angle (CFA) approach. Simulation results were used to inform the design of VFA sequences, validated in four volunteers for hyperpolarized xenon-129 imaging of the lungs and another four volunteers for hyperpolarized carbon-13 imaging of the human brain.