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Food systems: evolution, historical
and current impacts, disease
emergence - forward thinking
Food Security Forum 2014: Good food, good health: delivering the
benefits of food security in Australia and beyond University of
Sydney 17th March
Richard Kock Professor Wildlife Health & Emerging Diseases
Dept. Pathology & Pathobiology rkock@rvc.ac.uk
Summary of presentation
Agricultural development pathways & food systems
Agricultural impact on human, animal &
ecosystems health including disease emergence
risks.
Science & society’s shift from linear to systems
thinking - the One Health approach.
Need for improved metrics & shift in focus on
agricultural development
Richard kock food_systems_forward_thinking
Richard kock food_systems_forward_thinking
Richard kock food_systems_forward_thinking
Summary
• Historical background to animal domestication
• Intensification of agricultural systems and its
influence on pathogen & disease emergence
• Evolution of biosecurity concept in response to
economic impacts of disease in industrialised
livestock systems
• Conceptual model showing balance between
food security and ecosystem disservices
• Achieving a better balance
• Conclusions
Richard kock food_systems_forward_thinking
Richard kock food_systems_forward_thinking
Richard kock food_systems_forward_thinking
Richard kock food_systems_forward_thinking
Richard kock food_systems_forward_thinking
World Population 1750 to 1999
0
1,000
2,000
3,000
4,000
5,000
6,000
1750 1800 1850 1900 1950 1999
Asia Africa Europe Latin America and Caribbean Northern America Oceania
Source: United Nations cited on http://www.statistics.gov.uk/StatBase/
Medicines
Agriculture
Technology
Genes
+ 1 BILLION EVERY
DECADE
Demographic
Transition~ 2050?
Biological success story over a mere
250 years or is it?
Most of the impact on environment
has occurred in the last 50 years as
human & domestic animal
population expanded exponentially..
Time to count the cost?
Richard kock food_systems_forward_thinking
1975 2001
1975 2003
75% ALL AGRICULTURAL
LAND IS FOR FEED CROP AND
LIVESTOCK Foley 2005
Food and environment
115% increase in production on agricultural land
with only 8% increase in land conversion
24% of vegetated land has undergone soil
degradation
70% “Blue water” consumed by agriculture -
used to be 90%
The Future of Food and Farming (2011) Final Project
Report. The Government Office for Science, London.
‘Golden years’ of wild food
receding, although 1-2 billion still
depend on it
Wild food’s replacement
Growth in Aquaculture
(Duarte et al 2009)
Commoditisation of natural resources..
Humanity has shifted
from moving to food ..
Karesh et al 2007
To food moving to humanity
Unintended consequences of the
evolution of human food systems…
Daniel Lieberman
5 top risks of
premature
mortality:
Obesity
Inactivity
Smoking
High Blood
Glucose
High Blood
Pressure
Cheap Food!
Sugar
Sat Fats
Lack of Exercise
Richard kock food_systems_forward_thinking
J.Rushton
Interactions between food systems and
other spheres
UCL SDG Working Group
2014
Global trends in Mortality 1990-2020
Category A communicable maternal, perinatal, and nutritional disorders
Category B non-communicable disease
Category C injury
Millionsofpeople
Murray and Lopez 1997
?
WHO and Nat Museum Medicine Washington
Principle macro-drivers of disease
emergence
Broad changes in ecology are now
associated with pathogen emergence
but little research has been completed
on the mechanisms. This is a vital area
for future research (Jones et al 2013).
The main drivers are anthropogenic:
development & landscape change,
globalisation, intensification &
Industrialisation of the food system
Urbanisation and Disease
More than 25% of U.S.
land development has
been in just the last 15
years
EIDs in urban settings:
leptospirosis, plague,
food born disease,
dengue fever, SARS,
zoonotic avian
influenzas,.. …
Development dramatically altering
the landscape
• Destruction
of habitats
for roads,
settlement,
farming &
industry
(Ewing et al
2010 Global
Footprint
Network)
• Yellow Fever
• Malaria
• Hendra
• Nipah
• Ebola
• HIV
• Leishmania
• Fasciola
• Loss of heterogeneity in the
landscape (new but fewer niches)
- biodiversity decline & change in
community composition (Roche &
Guegan 2011; Clay et al 2009; Randolph
&Dobson 2012).
• More intense interface –
opportunity for spread & co-
evolution of parasites with
humans, domestic animals & few
wildlife species (Despommier et al 2006;
Lloyd-Smith et al 2009).
• Ecological resilience theory –
tipping points & thresholds are
being reached e.g. climate system
(Revolution 2009)
Changing landscape - new niches,
drivers.
Farming systems: Numbers and
density
H5N1
0
500,000
1,000,000
1,500,000
2,000,000
2,500,000
1961
1964
1967
1970
1973
1976
1979
1982
1985
1988
1991
1994
1997
2000
2003
DuckMeatProduction
(Tons)
China
Cambodia, Indonesia, Lao, Thailand and Vietnam
• In 2007, over 21 billion food animals
were produced for over 6 billion
people
• By 2020 the demand for animal
protein up by 50% mainly in
developing countries requiring over
30 billion animals
0
5
10
15
20
25
1900 1960 2000 2050
Human
(billion)
Cattle
Buffalo
Small
livestock
Pigs
Poultry
H7N9)
Intensification
Homogenisation
Loss of landscape heterogeneity
Devaluation of animal & human life
Tompkins et al 2011
Poverty and dependency
•Japanese Encephalitis virus persistence linked to amplification in pig units
(Erlanger et al., 2009),
•Nipah (Daszak et al., 2006) virus emergence linked to amplification in pig
industry in Malaysia (Graham et al., 2008, Barrette et al 2009) ,
•Last mammalian pandemic influenza virus HIN1 (Irvine & Brown 2009)
emergence from swine industry in Mexico, H5N1 H7N9 from intenstive poultry
systems in South East Asia
•Campylobacteriosis, brucellosis, tuberculosis associated with intensification of
livestock systems
•Hepatitis E linked to swine products (Garbuglia et al., 2013, Aggarwal & Naik,
2009 ).
•Human handling of pigs leads to increased Ecoli excretion (Callaway et al., 2006)
Pathogen factory.. Industrial poultry?
RISK
Newcastles
HPAI
Mareks
Salmonella
Campylobacter
New resistant &
virulent strains
(HPAI, Marek’s, ND
(Dugan et al 2008, Maclea et al 2007
Miller et al., 2010)
Amplification of pathogen
in aberrant host (HPAI)
Suarez 2000, Ito et al 2001, Souris et al 2010
Vaccines, antimicrobials,
pesticides
Biocontaminants – salmonella,
Campylobacter (Hermans et al 2011 ,
Altekreuse et al., 1997)
Richard kock food_systems_forward_thinking
Richard kock food_systems_forward_thinking
Richard kock food_systems_forward_thinking
Investment in Infectious Diseases
Investment in Non Communicable
Disease
Global trends in Mortality 1990-2020
Category A communicable maternal, perinatal, and nutritional disorders
Category B non-communicable disease
Category C injury
Millionsofpeople
Murray and Lopez 1997
Attention shift to structural
One Health to reduce disease
risks..
Structural crisis,
fundamental
unsustainability, &
imbalances in
current natural &
social global systems
producing conditions
for emergence of
diseases
Increasing pressures
within & between
human
environments,
natural ecosystems &
agricultures,
selecting for specific
diseases
Disease
spreading
among animals
and humans
Crisis
Response
Wallace et al in press 2014
Why Ecosystems Health?
Ecological processes are buffering against
disease
Ecosystem services
Clean air and water
Climate buffer
Natural waste processing (decomposers)
Pathogen dilution (community, biodiversity effects)
Pathogen buffering
Dietary diversity, nutrition
Immunocompetence
Genetic Health
Why be concerned about circuits of
capital and disease emergence
Production cycles:
• Degrade ecological resilience.
• Categorise humans & animals into markets & commodities.
• Globalise transport of goods people livestock & pathogens.
Epidemiological interventions:
• Denaturise, land grab, deforest, fence.
• Select for highly capitalised biosecure agriculture - industrial
intensified genetic monocultures that in themselves give rise to new
pathogens & their globalisation.
• Use of antimicrobials essential to intensive food systems, leading to
rapid, amplifying antimicrobial resistance developing & spreading.
AHI: animal health institute; UCS: union of concerned scientists
Rise in antimicrobial resistance
How will we measure sustainable
agriculture and progress in food safety &
security?
Currently:
• Poor metrics generally in MDG especially on poverty but
also on food insecurity – too much emphasis on calories &
subsidised grain industries – grain dumping.
• Improving metrics on nutrition – better to use stunting and
wasting rather than traditionally weight – better indicators of acute
and chronic under-nutrition.
• No real targets in agriculture – market led…e.g. no
agriculture food system MDGs met.
• Little attention to wild or natural food sources other than
governance & concerns over sustainability
• Little attention to emerging disease risks.
Richard kock food_systems_forward_thinking
Suggested changes to health/food
systems metrics
o Integrate food security & nutrition/health
issues.
o Go beyond metrics on food availability, access
& utilisation to include stability measures &
disease risk.
o Assess social consequences of agribusiness &
capitalised food systems (e.g. marginalisation
of small holders & rural in favour of urban
communities).
o Include poor nutrition & over-nutrition
measures.
Key Changes Needed in Health,
Agricultural and Food Systems Thinking
Better governance,
equity, sovereignty,
infrastructure,
finance, systems
change, new values,
ideas,
Education in general
& specifically to
improve health (self-
help), agriculture
practice & reduce
consumption & waste
Plan agriculture for a
reducing population
& absence of fossil
fuels
Climate Change
Water issues
Biodiversity
ecosystems
Thanks to:
Prof Robyn Alders FVM & the Food Forum & Political Ecology Grouping
at University of Sydney
Prof. Jonathan Rushton & Dr Barbara Haesler – LIDC/LCIRAH &
Sustainable Food Systems thematic research group RVC
Dr Jeff Waage – LIDC and Sustainable Development thematic research
group UCL
Prof Dirk Pfeiffer Ecosystems Health Research Group RVC
Dr Rob Wallace Institute of Global Studies University of Minnesota, &
Structural One Health Research Grouping
Acknowledgements
Lecture Dedicated to Prof Declan McKeever who passed away
February 2014 - former Head of the RVC Pathology Department

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Richard kock food_systems_forward_thinking

  • 1. Food systems: evolution, historical and current impacts, disease emergence - forward thinking Food Security Forum 2014: Good food, good health: delivering the benefits of food security in Australia and beyond University of Sydney 17th March Richard Kock Professor Wildlife Health & Emerging Diseases Dept. Pathology & Pathobiology rkock@rvc.ac.uk
  • 2. Summary of presentation Agricultural development pathways & food systems Agricultural impact on human, animal & ecosystems health including disease emergence risks. Science & society’s shift from linear to systems thinking - the One Health approach. Need for improved metrics & shift in focus on agricultural development
  • 6. Summary • Historical background to animal domestication • Intensification of agricultural systems and its influence on pathogen & disease emergence • Evolution of biosecurity concept in response to economic impacts of disease in industrialised livestock systems • Conceptual model showing balance between food security and ecosystem disservices • Achieving a better balance • Conclusions
  • 12. World Population 1750 to 1999 0 1,000 2,000 3,000 4,000 5,000 6,000 1750 1800 1850 1900 1950 1999 Asia Africa Europe Latin America and Caribbean Northern America Oceania Source: United Nations cited on http://www.statistics.gov.uk/StatBase/ Medicines Agriculture Technology Genes
  • 13. + 1 BILLION EVERY DECADE Demographic Transition~ 2050?
  • 14. Biological success story over a mere 250 years or is it? Most of the impact on environment has occurred in the last 50 years as human & domestic animal population expanded exponentially.. Time to count the cost?
  • 18. 75% ALL AGRICULTURAL LAND IS FOR FEED CROP AND LIVESTOCK Foley 2005 Food and environment 115% increase in production on agricultural land with only 8% increase in land conversion 24% of vegetated land has undergone soil degradation 70% “Blue water” consumed by agriculture - used to be 90% The Future of Food and Farming (2011) Final Project Report. The Government Office for Science, London.
  • 19. ‘Golden years’ of wild food receding, although 1-2 billion still depend on it
  • 23. Humanity has shifted from moving to food ..
  • 24. Karesh et al 2007 To food moving to humanity
  • 25. Unintended consequences of the evolution of human food systems… Daniel Lieberman
  • 26. 5 top risks of premature mortality: Obesity Inactivity Smoking High Blood Glucose High Blood Pressure Cheap Food! Sugar Sat Fats Lack of Exercise
  • 29. Interactions between food systems and other spheres UCL SDG Working Group 2014
  • 30. Global trends in Mortality 1990-2020 Category A communicable maternal, perinatal, and nutritional disorders Category B non-communicable disease Category C injury Millionsofpeople Murray and Lopez 1997
  • 31. ?
  • 32. WHO and Nat Museum Medicine Washington
  • 33. Principle macro-drivers of disease emergence Broad changes in ecology are now associated with pathogen emergence but little research has been completed on the mechanisms. This is a vital area for future research (Jones et al 2013). The main drivers are anthropogenic: development & landscape change, globalisation, intensification & Industrialisation of the food system
  • 34. Urbanisation and Disease More than 25% of U.S. land development has been in just the last 15 years EIDs in urban settings: leptospirosis, plague, food born disease, dengue fever, SARS, zoonotic avian influenzas,.. …
  • 35. Development dramatically altering the landscape • Destruction of habitats for roads, settlement, farming & industry (Ewing et al 2010 Global Footprint Network) • Yellow Fever • Malaria • Hendra • Nipah • Ebola • HIV • Leishmania • Fasciola
  • 36. • Loss of heterogeneity in the landscape (new but fewer niches) - biodiversity decline & change in community composition (Roche & Guegan 2011; Clay et al 2009; Randolph &Dobson 2012). • More intense interface – opportunity for spread & co- evolution of parasites with humans, domestic animals & few wildlife species (Despommier et al 2006; Lloyd-Smith et al 2009). • Ecological resilience theory – tipping points & thresholds are being reached e.g. climate system (Revolution 2009) Changing landscape - new niches, drivers.
  • 37. Farming systems: Numbers and density H5N1 0 500,000 1,000,000 1,500,000 2,000,000 2,500,000 1961 1964 1967 1970 1973 1976 1979 1982 1985 1988 1991 1994 1997 2000 2003 DuckMeatProduction (Tons) China Cambodia, Indonesia, Lao, Thailand and Vietnam • In 2007, over 21 billion food animals were produced for over 6 billion people • By 2020 the demand for animal protein up by 50% mainly in developing countries requiring over 30 billion animals 0 5 10 15 20 25 1900 1960 2000 2050 Human (billion) Cattle Buffalo Small livestock Pigs Poultry H7N9)
  • 38. Intensification Homogenisation Loss of landscape heterogeneity Devaluation of animal & human life Tompkins et al 2011
  • 40. •Japanese Encephalitis virus persistence linked to amplification in pig units (Erlanger et al., 2009), •Nipah (Daszak et al., 2006) virus emergence linked to amplification in pig industry in Malaysia (Graham et al., 2008, Barrette et al 2009) , •Last mammalian pandemic influenza virus HIN1 (Irvine & Brown 2009) emergence from swine industry in Mexico, H5N1 H7N9 from intenstive poultry systems in South East Asia •Campylobacteriosis, brucellosis, tuberculosis associated with intensification of livestock systems •Hepatitis E linked to swine products (Garbuglia et al., 2013, Aggarwal & Naik, 2009 ). •Human handling of pigs leads to increased Ecoli excretion (Callaway et al., 2006)
  • 41. Pathogen factory.. Industrial poultry? RISK Newcastles HPAI Mareks Salmonella Campylobacter New resistant & virulent strains (HPAI, Marek’s, ND (Dugan et al 2008, Maclea et al 2007 Miller et al., 2010) Amplification of pathogen in aberrant host (HPAI) Suarez 2000, Ito et al 2001, Souris et al 2010 Vaccines, antimicrobials, pesticides Biocontaminants – salmonella, Campylobacter (Hermans et al 2011 , Altekreuse et al., 1997)
  • 45. Investment in Infectious Diseases Investment in Non Communicable Disease
  • 46. Global trends in Mortality 1990-2020 Category A communicable maternal, perinatal, and nutritional disorders Category B non-communicable disease Category C injury Millionsofpeople Murray and Lopez 1997
  • 47. Attention shift to structural One Health to reduce disease risks..
  • 48. Structural crisis, fundamental unsustainability, & imbalances in current natural & social global systems producing conditions for emergence of diseases Increasing pressures within & between human environments, natural ecosystems & agricultures, selecting for specific diseases Disease spreading among animals and humans Crisis Response Wallace et al in press 2014
  • 49. Why Ecosystems Health? Ecological processes are buffering against disease Ecosystem services Clean air and water Climate buffer Natural waste processing (decomposers) Pathogen dilution (community, biodiversity effects) Pathogen buffering Dietary diversity, nutrition Immunocompetence Genetic Health
  • 50. Why be concerned about circuits of capital and disease emergence Production cycles: • Degrade ecological resilience. • Categorise humans & animals into markets & commodities. • Globalise transport of goods people livestock & pathogens. Epidemiological interventions: • Denaturise, land grab, deforest, fence. • Select for highly capitalised biosecure agriculture - industrial intensified genetic monocultures that in themselves give rise to new pathogens & their globalisation. • Use of antimicrobials essential to intensive food systems, leading to rapid, amplifying antimicrobial resistance developing & spreading.
  • 51. AHI: animal health institute; UCS: union of concerned scientists Rise in antimicrobial resistance
  • 52. How will we measure sustainable agriculture and progress in food safety & security? Currently: • Poor metrics generally in MDG especially on poverty but also on food insecurity – too much emphasis on calories & subsidised grain industries – grain dumping. • Improving metrics on nutrition – better to use stunting and wasting rather than traditionally weight – better indicators of acute and chronic under-nutrition. • No real targets in agriculture – market led…e.g. no agriculture food system MDGs met. • Little attention to wild or natural food sources other than governance & concerns over sustainability • Little attention to emerging disease risks.
  • 54. Suggested changes to health/food systems metrics o Integrate food security & nutrition/health issues. o Go beyond metrics on food availability, access & utilisation to include stability measures & disease risk. o Assess social consequences of agribusiness & capitalised food systems (e.g. marginalisation of small holders & rural in favour of urban communities). o Include poor nutrition & over-nutrition measures.
  • 55. Key Changes Needed in Health, Agricultural and Food Systems Thinking Better governance, equity, sovereignty, infrastructure, finance, systems change, new values, ideas, Education in general & specifically to improve health (self- help), agriculture practice & reduce consumption & waste Plan agriculture for a reducing population & absence of fossil fuels Climate Change Water issues Biodiversity ecosystems
  • 56. Thanks to: Prof Robyn Alders FVM & the Food Forum & Political Ecology Grouping at University of Sydney Prof. Jonathan Rushton & Dr Barbara Haesler – LIDC/LCIRAH & Sustainable Food Systems thematic research group RVC Dr Jeff Waage – LIDC and Sustainable Development thematic research group UCL Prof Dirk Pfeiffer Ecosystems Health Research Group RVC Dr Rob Wallace Institute of Global Studies University of Minnesota, & Structural One Health Research Grouping Acknowledgements Lecture Dedicated to Prof Declan McKeever who passed away February 2014 - former Head of the RVC Pathology Department