Dr Stephen Parnell

Dr Stephen Parnell

Unit Tutor
University of Salford

Contact Details:

Tel: +44 (0)161 295 6177
Email: s.r.parnell@salford.ac.uk

Stephen is a Lecturer in Spatial Epidemiology at the University of Salford.  He has a BSc (Hons) in Ecological Science from the University of Edinburgh and a PhD in Mathematical Biology from the University of Cambridge. He was a Senior Research Scientist at the BBSRC Institute Rothamsted Research before joining Salford and UNIGIS in 2014. 

 

Stephens research interests include the use of GIS and epidemiological modelling to study plant disease epidemics with a particular interest in how spatial processes determine the invasion and spread of disease.  A key practical focus is the design of epidemic surveillance and control strategies and Stephen works closely with organisations such as Defra and the US Department of Agriculture to inform regulatory disease interventions.

 

Selected Publications

  • Mastin, A., van den Bosch F., Gottwald, T.R., Alonso-Chavez, V. and Parnell, S. 2017. A method of determining where to target surveillance efforts in heterogeneous epidemiological systems. Plos Computational Biology. https://doi.org/10.1371/journal.pcbi.1005712
  • Brown, N., van den Bosch, F., Parnell S. and Denman S. 2017. Integrating regulatory surveys and citizen science to map outbreaks of forest diseases: acute oak decline in England and Wales. Proceedings of the Royal Society B. Print ISSN: 0962-8452.
  • Parnell, S., van den Bosch F., Gottwald, T.R. and Gilligan C.A. 2017. Surveillance for emerging plant disease; an epidemiological perspective. Annual Review of Phytopathology 55:25 1–25.
  • Hyatt-Twynam, S.R., Parnell, S., Stutt, R. O. J. H., Gottwald, T.R., Gilligan, C.A. and Cunniffe, N.J. 2017. Epidemiologically-motivated control strategies to manage outbreaks of invading plant disease. New Phytologist 214(3): 1317-1329.
  • Alonso-Chavez V., Parnell S. and van den Bosch, F. 2016. Monitoring invasive pathogens in plant nurseries for early-detection and to minimise the probability of escape. Journal of Theoretical Biology 407:290-302. doi: 10.1016/j.jtbi.2016.07.041. Epub 2016 Jul 28.
  • Milne A., Bell J. Hutchison W., van den Bosch F., Mitchell P., Crowder D., Parnell S., Whitmore A.P. 2015. The effect of farmer decisions on the control of pests: a billion dollar ecology game, PLOS computational biology. Doi:10.1371/journal.pcbi.1004483.
  • Alonso-Chavez V., Parnell S. and van den Bosch, F. 2015. Designing strategies for epidemic control in a tree nursery: the case of ash dieback in the UK. Forests 6 (11), 4135-4145.
  • Parnell S., Gottwald T.R, Cunniffe N.J., Alonso-Chavez V., van den Bosch F. 2015. Early detection surveillance for an emerging plant pathogen: a rule of thumb to predict prevalence at first discovery. Proceedings of the Royal Society B 282 (1814), 20151478.
  • Cunniffe N.J., Koskella B., Metcalf C.J.E, Parnell S, Gottwald T.R. and Gilligan C.A.  2014.  Thirteen challenges in modelling plant diseases. Epidemics. In Press. http://dx.doi.org/10.1016/j.epidem.2014.06.002
  • Parry, M. Gibson, G.J., Parnell, S., Gottwald, T.R., Irey, M.S., Gast, T.C. and Gilligan, C.A. 2014. Bayesian inference for an emerging arboreal epidemic in the presence of control. Proceedings of the National Academy of Sciences (PNAS) 111(17): 6258-6262. http://dx.doi.org/10.1073/pnas.1310997111
  • Parnell, S., Gottwald, T.R., Riley, T.R. and van den Bosch, F. 2014. A generic risk-based surveying method for invading plant pathogens. Ecological Applications 24:779–790 http://dx.doi.org/10.1890/13-0704.1
  • Parnell, S., Gottwald, T.R., Gilks, W.R. and van den Bosch, F. 2012. Estimating the incidence of an epidemic when it is first discovered and the design of early detection monitoring. Journal of Theoretical Biology 305:30-36. http://dx.doi.org/10.1016/j.jtbi.2012.03.009
  • Parnell, S., Gilligan, C.A., van den Bosch, F. and Gottwald, T.R. 2009. Optimal strategies for the eradication of Asiatic citrus canker in heterogeneous host landscapes. Phytopathology 99:1370-1376. http://dx.doi.org/10.1094/PHYTO-99-12-1370
  • Parnell, S., van den Bosch, F., and Gilligan, C.A. 2006. Large-scale fungicide spray heterogeneity and the regional spread of resistant pathogen strains. Phytopathology 96:549-555. http://dx.doi.org/10.1094/PHYTO-96-0549
  • Parry, M. Gibson, G.J., Parnell, S., Gottwald, T.R., Irey, M.S., Gast, T.C. and Gilligan, C.A. 2014. Bayesian inference for an emerging arboreal epidemic in the presence of control. Proceedings of the National Academy of Sciences (PNAS) 111(17): 6258-6262. http://dx.doi.org/10.1073/pnas.1310997111
  • Parnell, S., Gottwald, T.R., Riley, T.R. and van den Bosch, F. 2014. A generic risk-based surveying method for invading plant pathogens. Ecological Applications 24:779–790 http://dx.doi.org/10.1890/13-0704.1
  • Parnell, S., Gottwald, T.R., Gilks, W.R. and van den Bosch, F. 2012. Estimating the incidence of an epidemic when it is first discovered and the design of early detection monitoring. Journal of Theoretical Biology 305:30-36. http://dx.doi.org/10.1016/j.jtbi.2012.03.009
  • Parnell, S., Gilligan, C.A., van den Bosch, F. and Gottwald, T.R. 2009. Optimal strategies for the eradication of Asiatic citrus canker in heterogeneous host landscapes. Phytopathology 99:1370-1376. http://dx.doi.org/10.1094/PHYTO-99-12-1370
  • Parnell, S., van den Bosch, F., and Gilligan, C.A. 2006. Large-scale fungicide spray heterogeneity and the regional spread of resistant pathogen strains. Phytopathology 96:549-555. http://dx.doi.org/10.1094/PHYTO-96-0549