Principal pathologist with 38 years of experience and specialist expertise in histopathology, ultrastructure, host-pathogen interactions in aquatic animals. He has over 150 peer reviewed publications on aspects of infectious disease pathology, toxicopathology and parasite taxonomy in fish, amphibia, molluscs, crustacea and echinoderms. Stephen has particular expertise in myxozoan parasites, ultrastructural development and pathogenicity and was part of the team that established the lifecycle of the causative agent of proliferative kidney disease (PKD) via bryozoan and established the Class Malacosporea.
In addition, he was responsible for marine fish disease monitoring for over 10 years and established histological criteria for the diagnosis of liver pathology in European flatfish. He has published several book chapters and has been an invited keynote speaker at national and international meetings. He is the contact for the World Organization for Animal Health (OIE) Collaborating Centre for Information on Aquatic Animal Disease and is responsible for the International Database for Information on Aquatic Animal Disease (IDAAD). He is also director for the National Reference Laboratory for Anisakis. He was former president of the European Association of Fish Pathologists (EAFP) (2009 to 2013) following his initial appointment to the Council as Meetings Secretary in 2005. Since then he has maintained involvement via subject editor for histopathology for the EAFP Bulletin. He was appointed to the editorial board of the journal Diseases of Aquatic Organisms in 2002 as review editor for proliferative disorders and became Editor-in-Chief for DAO in 2015.
In recent years he conceived and established the annual "Short course on toxicologic pathology in fish" with colleagues in Switzerland and Germany. He leads the government-funded program of work on emerging disease and is a member of the International Council for the Exploration of the Seas (ICES) Expert Group on Pathology and Diseases of Marine Organisms (WGPDMO).
Research Publications: Google Scholar, Research Gate