Dr Roger Humphry

Scotland's Rural College

Research Interests

My interest and expertise lies in quantitative agricultural and environmental science. The current areas of my work are:

  • BVD, it's eradication and sample size calculation for screening for BVD
  • The links between animal health and pollution
  • Antimicrobial resistance and its measurement
  • The consequence of empirically derived contact networks in cattle on the spread of disease

In addition to statistical modelling I have also published results from process-based modelling in BVD, Johnes and arable biodiversity.

My education is a degree in maths and plant science (Cambridge) and PhD in plant ecology (Liverpool) and statistical qualifications with the Open University and the Royal Statistical Society.


I have lectured on the Open University’s mathematical modelling summer school and I have run introductory courses to statistics for NHS Highland.

Consultancy & Industry-liaison

  • Provide statistical advice to other researchers or students within NHS Highland and oversee management of data from pig health schemes
  • Member of the Royal Statistical Society’s Highland Committee
  • Honorary editor for the Journal of Biological Systems

Selected Publications

  • Duncan, A.J., Gunn, G.J., Umstatter, C., & Humphry, R.W. 2014. “Replicating disease spread in empirical cattle networks by adjusting the probability of infection in random networks”. Theoretical Population Biology 98: 11-18 Full Text
  • Gates, M. , Humphry, R.W., Gunn, G.J., & Woolhouse, M. 2014 “Not all cows are epidemiologically equal: quantifying the risks of bovine viral diarrhoea virus (BVDV) transmission through cattle movements” Veterinary Research 45: 110. doi:10.1186/s13567-014-0110-y Full Text
  • Humphry, R.W., & Gunn, G.J. 2014. “Antimicrobial resistance and bacterial density” Veterinary Record 174:202 doi:10.1136/vr.g1638 Full Text
  • Gates, M C; Humphry, R W; Gunn, G J, 2013. “Associations between bovine viral diarrhoea virus (BVDV) seropositivity and performance indicators in beef suckler and dairy herds”.
    Veterinary journal  198: 631-7 Full text
  • Gates, Woolhouse, Gunn & Humphry. 2013. “Relative associations of cattle movements, local spread, and biosecurity with bovine viral diarrhoea virus (BVDV) seropositivity in beef and dairy herds”. Full text
  • Humphry, RW,  Brülisauer, F.,  McKendrick, I.J., Nettleton, P.F.,  & Gunn, G.J. 2012 “Prevalence of antibodies to bovine viral diarrhoea virus in bulk tank milk and associated risk factors in Scottish dairy herds” Veterinary Record. Full Text
  • Agyemang, C., Humphry, R.W., Bhopal, R. 2012. Divergence with Age in Blood Pressure in African-Caribbean and White Populations: Implications for Screening for Hypertension, American Journal of Hypertension, 25 1, 89–96. Full Text
  • Caron-Lormier, G., Humphry, R.W., Bohan, D.A., Hawes, C., Thorbek, P. 2008. Asynchronous and synchronous updating in individual-based models. Ecological Modelling, 212, 522-527. Full Text
  • Humphry, RW, Stott, AW & Gunn, GJ. 2005. Modelling BVD at herd level compared with individual animal level. Preventive Veterinary Medicine, 72, 169-175. Full Text
  • Humphry, R.W., A.W. Stott, C. Adams and G.J. Gunn 2006. A model of the relationship between the epidemiology of Johne’s disease and the environment in suckler-beef herds, The Veterinary Journal. Full Text