Biography

Prof. dr.ir. Gerdien van Schaik obtained an MSc in Animal Science at Wageningen University, the Netherlands with specializations in Epidemiology and Reproduction, and Animal Health Economics. In 2000, she obtained her PhD in Animal Health Economics at the same university. From 2000 to 2002 she worked in the USA as a postdoctoral fellow at Cornell University in the Department of Population Medicine and Diagnostic Science followed by a position in Chile as associate professor in Preventive Medicine at the Universidad Austral de Chile.

Between 2004 and 2021, she was heading the Epidemiology group of GD Animal Health. In 2015, she was appointed a chair in Monitoring and Surveillance of Farm Animal Health at the faculty of Veterinary Medicine of Utrecht University. Her chair focusses on evaluation of current surveillance activities and possibilities for improvement with innovative quantitative methods, such as risk-based surveillance and syndromic surveillance.

Publications

• Fabri, N.D., Santman-Berends, I.M.G.A., Weber, M.F., van Schaik.  G., 2024. Risk factors for the introduction of Salmonella spp. serogroups B and D into Dutch dairy herds. Prev Vet Med. 2024 Aug 13;232:106313. doi: 10.1016/j.prevetmed.2024.106313
• Lis Alban, Anaïs Léger, Anouk Veldhuis, Gerdien van Schaik, Modernizing the antimicrobial residue monitoring programs for pig meat in Europe – the balance between flexibility and harmonization, Food Control (2017), doi: 10.1016/j.foodcont.2017.11.040
• Santman-Berends IMGA, Mars MH, Waldeck HWF, van Duijn L, Wever P, van den Broek KWH, van Schaik G. Quantification of the probability of reintroduction of IBR in the Netherlands through cattle imports. Prev Vet Med. 2018 150: 168–175
• Santman-Berends IMGA, Mars MH, Van Duijn L, Van den Broek KWH, Van Schaik G. A quantitative risk-analysis for introduction of Bovine Viral Diarrhoea Virus in the Netherlands through cattle imports. Prev Vet Med. 2017 Oct 1;146:103-113.
• Sauter-Louis C, Jones BA, Henning J, Stoll A, Nielen M, Van Schaik G, et al. (2017) Herd-level animal management factors associated with the occurrence of bovine neonatal pancytopenia in calves in a multi-country study. PLoS ONE 12(7): e0179878. https://doi.org/10.1371/journal. pone.0179878
• Veldhuis A, Santman-Berends I, Schauer B, Mars J, Waldeck F, Staubach C, van Schaik G. Epidemiological performance and subsequent costs of different surveillance strategies to control bovine herpesvirus type 1 in dairy farms. Prev Vet Med. 2017 Apr 1;139(Pt B):105-114. doi: 10.1016/j.prevetmed.2016.12.003. Epub 2017 Jan 18.
• Maas M, Gröne A, Kuiken T, Van Schaik G, Roest HI, Van Der Giessen JW. Implementing wildlife disease surveillance in the Netherlands, a One Health approach. Rev Sci Tech. 2016 Dec;35(3):863-874. doi: 10.20506/rst.35.3.2575.
• Bisdorff B, Schauer B, Taylor N, Rodríguez-Prieto V, Comin A, Brouwer A, Dórea F, Drewe J, Hoinville L, Lindberg A, Martinez Avilés M, Martínez-López B, Peyre M, Pinto Ferreira J, Rushton J, Van Schaik G, Stärk KD, Staubach C, Vicente-Rubiano M, Witteveen G, Pfeiffer D, Häsler B. Active animal health surveillance in European Union Member States: gaps and opportunities. Epidemiol Infect. 2017 Mar;145(4):802-817. doi: 10.1017/S0950268816002697. Epub 2016 Dec 12.
• Santman-Berends IM, Gonggrijp MA, Hage JJ, Heuvelink AE, Velthuis A, Lam TJ, van Schaik G. Prevalence and risk factors for extended-spectrum β-lactamase or AmpC-producing Escherichia coli in organic dairy herds in the Netherlands. J Dairy Sci. 2017 Jan;100(1):562-571. doi: 10.3168/jds.2016-11839. Epub 2016 Nov 17. 
• Santman-Berends IM, Brouwer-Middelesch H, Van Wuijckhuise L, de Bont-Smolenaars AJ, Van Schaik G. Surveillance of cattle health in the Netherlands: Monitoring trends and developments using routinely collected cattle census data. Prev Vet Med. 2016 Nov 1;134:103-112. doi:10.1016/j.prevetmed.2016.10.002. Epub 2016 Oct 6. 
• Gonggrijp MA, Santman-Berends IM, Heuvelink AE, Buter GJ, van Schaik G, Hage JJ, Lam TJ. Prevalence and risk factors for extended-spectrum β-lactamase- and AmpC-producing Escherichia coli in dairy farms. J Dairy Sci. 2016 Nov;99(11):9001-9013. doi: 10.3168/jds.2016-11134. PubMed PMID: 27638264.
• Welby S, van Schaik G, Veldhuis A, Brouwer-Middelesch H, Peroz C, Santman-Berends IM, Fourichon C, Wever P, Van der Stede Y. Effectiveness and Cost Efficiency of Different Surveillance Components for Proving Freedom and Early Detection of Disease: Bluetongue Serotype 8 in Cattle as Case Study for Belgium, France and the Netherlands. Transbound Emerg Dis. 2016 Sep 26. doi:10.1111/tbed.12564. PubMed PMID: 27670151.
• de Vries M, Bokkers EA, van Schaik G, Engel B, Dijkstra T, de Boer IJ. 2016. Improving the time efficiency of identifying dairy herds with poorer welfare in a population. J Dairy Sci. 2016 Jul 13. pii: S0022-0302(16)30453-2. doi: 10.3168/jds.2015-9979. [Epub ahead of print]
• Scherpenzeel CG, den Uijl IE, van Schaik G, Riekerink RG, Hogeveen H, Lam TJ.2016. Effect of different scenarios for selective dry-cow therapy on udder health, antimicrobial usage, and economics. J Dairy Sci. 2016 May;99(5):3753-64. doi: 10.3168/jds.2015-9963.
• Santman-Berends IM, Swinkels JM, Lam TJ, Keurentjes J, van Schaik G. 2016. Evaluation of udder health parameters and risk factors for clinical mastitis in Dutch dairy herds in the context of a restricted antimicrobial usage policy. J Dairy Sci. 2016 Apr;99(4):2930-9. doi: 10.3168/jds.2015-10398. Epub 2016 Feb 10.
• Veldhuis, AMB, Brouwer-Middelesch, H, Marceau A, Madouasse, A, Van der Stede Y, Fourichon, C., Welby S, Wever P, van Schaik, G. 2016. Application of syndromic surveillance on routinely collected cattle reproduction and milk production data for the early detection of outbreaks of Bluetongue and Schmallenberg viruses. Prev Vet Med. 2016 Feb 1;124:15-24. doi:10.1016/j.prevetmed.2015.12.006. Epub 2015 Dec 18.