Presentation.goat.sheep
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INVESAGA - USC 1 XVIII Congreso de la Sociedad Española de Parasitología The goat as a risk factor for parasitic infections in ovine flocks López, C.M., Panadero, R., Díaz, P., Pérez, A., Cabanelas, E., Díez-Baños, P., Morrondo, P.
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Goat as a risk factor for sheep infection
Transcript of Presentation.goat.sheep
INVESAGA - USC 1
XVIII Congreso de la Sociedad Española de Parasitología
The goat as a risk factor for parasitic infections in ovine flocks
López, C.M., Panadero, R., Díaz, P., Pérez, A., Cabanelas, E., Díez-Baños, P., Morrondo, P.
INVESAGA - USC 2
Sheep-goat contact
● 30% flocks● Risk factor?● VM (Lago et al., 2012)
● Protostrongilidae (López et al., 2011)
INTRODUCTION
INVESAGA - USC 3
MATERIAL AND METHODS
Sheep-goat contact● 74 flocks● 2,093 sheep
– 468 mixed manage with goats
– 1,625 manage without goats
● Flotation, sedimentation and migration● R - cc() function – epicalc package
INVESAGA - USC 4
RESULTS
● Protostrongylidae
χ2= 21.690; P<0,001
goats
Prot. no yes total
neg 1466 385 1851
pos 159 83 242
total 1625 468 2093
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RESULTS
● Gastrointestinal nematodes
χ2= 24.910; P<0,001
goats
GI no yes total
neg 582 99 681
pos 933 300 1233
total 1515 399 1914
INVESAGA - USC 6
RESULTS
● Dictyocaulus filaria
χ2= 12.312; P<0,001
goatsD.filaria no yes total
neg 1473 397 1870
pos 152 71 223
total 1625 468 2093
INVESAGA - USC 7
RESULTS
● Eimeria spp
χ2= 12.312; P<0,001
goatsEimeria no yes total
neg 422 77 681
pos 1093 322 1233
total 1515 399 1914
INVESAGA - USC 8
RESULTS
No association● Fasciola hepatica (104 positive; OR 1.01)● Dicrocoelium (14 positive)● Paramphistomidae (12 positive)● Moniezia (96 positive; OR 1.02)
INVESAGA - USC 9
IN FACT ...
● Association ≠ causality– Biological explanation
● Confouding variable– Multivariate analysis
● but...
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CONCLUSION
Mixed management sheep-goat must be introduced as a risk factor in statistical
analysis in sheep infection studies
INVESAGA - USC 11
THANKS
Supported by the research project PGIDIT06RAG26101PR and a grant for Consolidating and Structuring Competitive
Research Groups (Xunta de Galicia CN2012/326)
References:
López et al. (2011). Vet. Parasitol. 178, 108-114.
Lago et al. (2012). Prev.Vet.Med. 103, 163-169.
INVESAGA - USC 12
XVIII Congreso de la Sociedad Española de Parasitología
The goat as a risk factor for parasitic infections in ovine flocks
López, C.M., Panadero, R., Díaz, P., Pérez, A., Cabanelas, E., Díez-Baños, P., Morrondo, P.
