1 Department of Infection, Hull University Teaching Hospitals NHS Trust, Infection Research Group, Hull, United Kingdom.
2 School of Health and Related Research, University of Sheffield, Sheffield, United Kingdom.
3 Yorkshire Ambulance Service NHS Trust, Wakefield, United Kingdom.
4 Institut Pasteur de Dakar, Dakar, Senegal.
5 Department of Infection, Hull University Teaching Hospitals NHS Trust, Infection Research Group, Hull, United Kingdom; Hull York Medical School, University of Hull, Hull, United Kingdom.
6 Department of Infection, Hull University Teaching Hospitals NHS Trust, Infection Research Group, Hull, United Kingdom; Hull York Medical School, University of Hull, Hull, United Kingdom. Electronic address: nicholas.easom@nhs.net.