Links between wild and domestic animals - William B ... · Links between wild and domestic animals...
Transcript of Links between wild and domestic animals - William B ... · Links between wild and domestic animals...
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Links between wild and domestic animals - diseases and knowledge gaps
William B. Karesh DVM
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Wildlife Defined
PHENOTYPE SELECTED BY HUMANS
ANIMALS LIVE UNDER HUMAN
SUPERVISION OR
CONTROL
YES NO
YES Domestic Animals (a) Captive Wild Animals (c)
NO Feral Domestic Animals (b) Wild Animals (d)
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Wild Animal ≠ Wild Species
Domestic Animal ≠ Domestic Species
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• Anas platyrhynchos
Mallard Rouen Domestic Duck White Domestic Duck
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• Sus scrofa
Eurasian Wild Pig Domestic Pig
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African Buffalo – Syncerus caffer
PHENOTYPE SELECTED BY HUMANS
ANIMALS LIVE
UNDER HUMAN
SUPERVISION OR
CONTROL
YES NO
YES Domestic Animals (a)
Captive Wild Animals (c)
NO Feral Domestic Animals (b)
Wild Animals (d)
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Water Buffalo – Bubalus bubalis
PHENOTYPE SELECTED BY HUMANS
ANIMALS LIVE
UNDER HUMAN
SUPERVISION OR
CONTROL
YES NO
YES Domestic Animals (a)
Captive Wild Animals (c)
NO Feral Domestic Animals (b)
Wild Animals (d)
Asiatic Buffalo - Bubalus amee
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American Buffalo – Bison bison
PHENOTYPE SELECTED BY HUMANS
ANIMALS LIVE
UNDER HUMAN
SUPERVISION OR
CONTROL
YES NO
YES Domestic Animals (a)
Captive Wild Animals (c)
NO Feral Domestic Animals (b)
Wild Animals (d)
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African Swine Fever
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• Endemic in wild suids in many parts of Africa
• Introduced to Eastern Europe (trade)
• Both feral pigs and Eurasian wild pig susceptible
• Did not become established in wild peccaries in South America (not suids)
African Swine Fever
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Foot and Mouth Disease
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FMD Domestic animals
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FMD domestic buffalo
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FMD wild animals
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• Endemic in African buffalo in many parts of Africa (SAT only)
• Wide species host range – but has not been shown to persist in New World camelids, antelope/gazelle.
• Persistent infections in cervids after experimental infection.
Foot and Mouth Disease
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• A, O, C, Asia 1 and SAT(3)
• SAT strains appear to the only group adapted to wild animals: African buffalo
• A, O, C, and Asia 1 appear to be domestic cattle adapted strains
Foot and Mouth Disease
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0%
20%
40%
60%
80%
100%
PI-3
BRSV BV
D
IBR BT
FMD
POX
CALVES1998 AD1999 AD
SHEEPGOATS
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PPR domestic animals
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PPR wild animals
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• In wildlife, a number of wild animals have been identifed as suceptible: Laristan sheep, Dorcas-type gazelles, gemsbok and the Nubian ibex
• As with Rinderpest – no wild animal reservoir been found
Peste des Petit Ruminants
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Rabies Hosts • Over 132 host mammal
species
– Domestic, human and wildlife
• Of global concern, with diverse local threats
“Because few tools are available
to control infections of wildlife, measures to control diseases associated with wildlife have often resulted in harm to wildlife (e.g. culling…)” (Cleaveland et al., 2007)
27
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Rabies Hosts
Total Host Mammals >132
Domestic 16
Wild and Human 116
28
Current as of August 2011
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29 C. Sidnam
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Common Ground
• Rabies
• FMD
• Tuberculosis
• Brucellosis
• Animal Influenzas
• Bluetongue/EHD - Orbiviruses
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Common Ground
• Systems / integrated approaches
• Disease emergence
• Climate change
• Natural resource allocation
• Anti-microbial resistance
• Global animal movement/trade
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