Prof. Jacobus Joannes (Sjaak) de Wit

DVM, PhD, dipl ECPVS

EBVS® European Specialist in Poultry Veterinary Science

Professor Integrated Poultry Health at the Veterinary Faculty of Utrecht University, the Netherlands


As senior scientist of Royal GD, I’m responsible for the technical aspects and quality system of the poultry serology (1.5 million tests yearly) that is performed GD Deventer. The work includes advising national and international poultry veterinarians, and integrations about the diagnostic approach of diseases including the choice of tests, sample size, and epidemiology. Another part of the work concerns applied scientific work like with infectious bronchitis virus, Gumboro virus, avian influenza virus, reovirus, astrovirus, etc..

Education: DVM, PhD,
Specialist in Poultry Health (accreditation by Royal Dutch Association of Veterinarians in 1998)
- Founding diplomat of the European College of Veterinary Poultry Science (2008)
- member of the Hall of Honour of the World Veterinary Poultry Association ( august 2013)
- Vice President of World Veterinary Poultry Association

Professional activities:

1989 - 1995: Poultry veterinarian at GD (Animal Health), The Netherlands
1995 - present: Immunologist and researcher at GD Deventer (Animal Health Service)
1999 - 2001: Senior scientist at the Poultry Department of University of Utrecht.
1999 - 2005: Leader of working group 2, “Diagnosis and economic impact” of the European COST Action 839: Immunosuppressive Viral Diseases in Poultry
2006 - present Associate editor of Avian Pathology
2008 - 2016 Treasurer of ECVPS
2016 - present President of ECVPS
2011 - present Chairman of Registratie commissie Specialist Pluimveegezondheid KNMvD
2013 - 2017 Member of MC COST IBV, leader of the working group 2, “Immunity and serology”.
2013 - present Member of the advisory board on animal diseases of the Dutch ministry of economic affairs
2013 Member of the scientific committee of the WPVA Congress in Nantes
2019 - present: vice president of World Veterinary Poultry Association