eradication of the tsetse fly with the sterile insect technique: the example of senegal
TRANSCRIPT
Eradication of the Tsetse Fly with the Sterile Insect Technique: the example of Senegal
29th FAO Regional Conference for Africa, Abidjan, 06 April 2016The FAO-IAEA Partnership - Successes in Nuclear Applications
F. Bouyer, A. Dicko, M.T. Seck, B. Sall, M. Lo, M. Vreysen, E. Chia, A. Wane, J. Bouyer
Context
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Phases of the tsetse eradication project in the Niayes of Senegal
2005-2007 Discussions between DSV & FAO-IAEA -> strong political will of Senegal to control tsetse & trypanosomosis
2007-2010 Feasibility study: target area of 1000 km2 delimited and isolation status confirmed
2010-2011 Pre-operational phase (pupae transport, competitiveness, survival, dispersal)
2011-2016 Operational phase: sequential eradication
The team
ISRA/CIRADOperational
ResearchInsectarium
Direction of Vet Services
Coordination of the project
Coordination cell
1 meeting / month
Vet agentsEntomological surveys
Suppression
Dedicated personalEntomological surveys
SIT
Field results
Adaptive Management
Joint FAO/IAEA Division of
Nuclear Techniques in
Food and Agriculture
Technical advice
IAEA Department of
Technical Cooperation
Technology transfer + financial support
2011 2012 2013 2014 2015 2016 2017 2018Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
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Blocks
1
2
3
Programme of sequential eradication
Dakar
Kayar
Thiès
Pout
Bargny
Sebikotane
zonesurveillance par blocks
1 (11)2 (21)3a (12)3b (11)
Suppression
Entomological monitoringEradication
Suppression using insecticide-treated targets and cattleEradication using aerial release of sterile males
Control Strategy
Dicko, A.H., et al. (2014) Using species distribution models to optimize vector control: the tsetse eradication campaign in Senegal. PNAS.
Impact of the Sterile Insect Technique on tsetse population
1-3,4 insecticide impregnated targets/km2
+10 and 100 sterile
males/km2
unsuitable vs suitable habitat
respectively
SIT
SIT
Distribution of the costs by partner (left) and component (right).Bouyer F, Seck MT, Dicko AH, Sall B, et al. (2014) Ex-ante Benefit-Cost Analysis of the Elimination of a Glossina palpalis gambiensis Population in the Niayes of Senegal. PLoS Negl Trop Dis 8(8): e3112. doi:10.1371/journal.pntd.0003112http://www.plosntd.org/article/info:doi/10.1371/journal.pntd.0003112
Estimated cost of the eradication project~ 6.4 million Euro until 2016 (~€ 6400/km2)
Evaluation of the Benefits3 farming systems based on different cattle breeds
One traditional system based on trypanotolerant cattleannual cattle sales €74 (s.d. 38) per head
Two other livestock keeping systems using more productive breeds (improved meat & improved milk production)annual cattle sales were € 250 (s.d. 513) per
headherd size 45% smaller
Comparison of the total costs of the project and increase in global cattle sales per year (year 1 = 2007)
Bouyer F, Seck MT, Dicko AH, Sall B, et al. (2014) Ex-ante Benefit-Cost Analysis of the Elimination of a Glossina palpalis gambiensis Population in the Niayes of Senegal. PLoS Negl Trop Dis 8(8): e3112. doi:10.1371/journal.pntd.0003112http://www.plosntd.org/article/info:doi/10.1371/journal.pntd.0003112
Rate of Return (IRR) of 9.8% and payback period of 18 years
Rate of Return (IRR) of 19.1% and payback period of 13 years
ConclusionsBenefits of the campaign already huge Change in sanitary context already perceived
-> strong innovation anticipatedThe change of socio-technical regime
accelerated after the eradication processReduction of cattle size and integration
between agriculture and cattle breeding promoted
The Senegal project still needs to find ~800 k€ to complete eradication
Thanks!