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APHA science on the global stage

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Between 7—12 August 2022, 603 delegates representing over 200 organisations from 47 different countries descended on Halifax, Canada, where the 16th International Symposium of Veterinary Epidemiology and Economics (ISVEE16) was taking place.

Lucky enough to be involved were myself and eight other scientists at APHA, alongside other notable organisations such as the World Organisation for Animal Health (WOAH), the World Health Organisation (WHO) and the European Food Safety Authority (EFSA).

ISVEE is a large gathering of students, researchers, and policymakers from different areas of expertise, where information is exchanged to advance the fields of veterinary epidemiology and economics and ultimately move towards a healthier world. This happens through a mixture of oral and poster presentations, question and answer sessions, panel discussions, workshops and social events.

Since the first edition of ISVEE in 1976, which was hosted by Reading in the UK, the symposium has been held every three years, spanning all continents (apart from Antarctica!) and taking in locations such as Singapore, Nairobi, and Paris (proceedings are archived here).

As a relative newcomer to APHA, ISVEE offered me an opportunity to get up to date with research at the forefront of the field, build new connections with researchers from across the world, as well as to get feedback on my own research.

A group of people standing for a photo with the words 'APHA attend 16th international symposium of veterinary epidemiology and economics' overlaid in front
APHA at ISVEE16, from left to right: Ruth Cox, María Vilar Ares, Neil Wilkins, Matthew Coleman, Colin Birch, Rachelle Avigad, Charlotte Cook, Bryony Jones, and Hannah May.

What did APHA have to offer?

In all, APHA contributed seven oral and five poster presentations at the symposium.

My talk made it into Thursday morning’s session which was dedicated to epidemiological studies in swine. As this was my first ever presentation at a conference (thanks to COVID-19 interrupting my PhD), I was quite nervous, especially as there were so many people. A Monday morning slot would have been preferable to get it out of the way!

The topic of my talk was ‘A farm-to-consumption quantitative microbiological risk assessment (QMRA) for hepatitis E in pigs’, which is a project I have been working on for the past year in collaboration with partners in France and Austria, as part of the One Health European Joint Programme.

While traditionally associated with travel to foreign countries, locally acquired human hepatitis E cases have risen significantly in developed countries over the past couple of decades, with consumption of pork products the suspected cause.

The aim of my work is to use mathematical modelling to predict the number of human hepatitis E cases in France due to consumption of different pork products. The model simulates all stages of the pork supply chain, including on-farm transmission, the slaughterhouse, and consumer cooking. We do this because various scenarios, such as implementing different biosecurity practices on farms, can be built into the model and we can therefore assess their effectiveness.

Aside from my presentation, APHA’s work on show at the Halifax convention centre spanned a broad range of topics. Matthew Coleman spoke about a model to simulate the spread of African Swine Fever in Great Britain, while Colin Birch presented a statistical analysis of the impact of badger control on bovine tuberculosis in England. Antimicrobial resistance, Salmonella in pigs and coronavirus in wildlife were some of the other topics we had to offer.

Image split into four sections: a man standing at a lectern aside a presentation showing an image of a badger and some text, a female standing in front of a poster presentation, another female standing next to a poster presentation and the same female presenting at the conference in front of an audience.
Selected APHA contributions at ISVEE16. Top left: Colin Birch’s talk on the impact of badger control on bovine tuberculosis. Right: Hannah May’s poster on biosecurity measures against Salmonella in pigs. Bottom left: Bryony Jones’ poster on rinderpest destruction and Bryony chairing a special session on modelling approaches.


As an international conference, one thing that stood out for me at ISVEE was how different countries and regions face their own epidemiological challenges, with presentations ranging from highly pathogenic avian influenza in Europe to classical swine fever in Japan and foot-and-mouth disease in Africa. I particularly enjoyed a talk about a food-safety campaign for chicken consumption at urban food markets that was run in Ouagadougou, Burkina Faso. Also, as my role at APHA is in risk modelling, there were several presentations in this area that I found interesting.

In summary, I came home from ISVEE with a long list of things to follow up on – including writing this blog! Here are some highlights as seen by others at APHA:

“I met a couple of delegates doing a very similar role to me in other countries, which was great to compare and contrast practices. I also met delegates involved in work developing a basis for assessing the costs of animal diseases worldwide, as well as ex-colleagues who I linked up with again.”

Dr Rachelle Avigad, Head of National TB Epidemiology, APHA

“There was an interesting talk about vaccination for classical swine fever (CSF) during the ongoing outbreak in Japan. Japan was considered CSF free and had ended its vaccination program before the onset of the new outbreak and did not start vaccinating again until months after the initial identification of the disease. It was interesting to see how the outbreak was spreading in the wild pig population and how hard it is to control an outbreak that has got into a typically hard to contain wild animal population.”

Dr Matthew Coleman, Senior Mathematical Modeller, APHA

“I picked up some ideas for network analysis of animal movements, scenario tree modelling for assessing freedom from infection, and exploring seasonality of disease occurrence.”

Dr Bryony Jones, Senior Epidemiologist, APHA

Aerial image of a town and a body of water.
Aerial view of Halifax.

Scientific recognition

Tuesday morning began with the ISVEE awards ceremony, where Professor John Wilesmith, former Head of Epidemiology at the Veterinary Laboratory Agency (which preceded APHA), won the Roger Morris ISVEE Award for Outstanding Contribution to Veterinary Epidemiology and Economics.

Prof. Wilesmith was at the forefront of the UK’s battle against Bovine spongiform encephalopathy (BSE) or ‘mad cow disease’ in the 1980s and 1990s. In particular, his epidemiological work concluded that BSE had emerged due to the consumption of meat-and-bone meal that had been fed to cattle.

What is next?

ISVEE17 is set for Sydney, Australia from 11—15 November 2024, where I am sure APHA will have lots of new science to present all over again.

“It is important for APHA scientists to have the opportunity to present their science, learn from others and to network with colleagues from across the world. This ensures that APHA’s work is current, visible and influential internationally, which are also important objectives of the joint APHA and Royal Veterinary College WOAH Collaborating Centre for Risk Analysis and Modelling. This collaborating centre aims to promote and facilitate the use of risk analysis and modelling to inform the development of policies aimed at controlling animal disease, improving animal welfare and protecting public health.”

Prof. Emma Snary, Head of Epidemiological Sciences, APHA

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