Congenital Orthopaedic Deficiency Phenotypes in Sheep and Goats in Sahel

2016-08-16T19-20-02Z
Source: Annals of Veterinary and Animal Science
Bokko PB, Adamu SS, Garleya B, Suleiman S.
A survey of the frequency of congenital orthopaedic deficiency phenotypes in sheep and goats in Maiduguri area of Sahel was performed from January 2010 to December 2014. Of 41769 sheep and 147649 goats appraised, 1971 sheep and 4483 goats had at least one congenital orthopaedic deficiency phenotype. This translates to a prevalence of 5.67% in sheep and 3.04% in goats. The recorded congenital orthopaedic defective phenotypes include wavy or curvilinear spine, angular limb deformities, sloppy or straight pastern as well as varus or valgus deformities and hoof overgrowth. The more frequent defects such as hoof overgrowth, varus and valgus deformities, cowhock or bowleg in both sheep and goat tended to cause milder functional disruption. The rarer congenital defect like torticollis, limb paresis, spider lamb syndrome, contracted flexor tendons and congenital joint rigidity occur sporadically but tend to exhibit severe defects. These conditions impede the overall development of sheep production system and profitability. The frequencies of the orthopaedic disorders were higher in sheep than in goats and more in the forelimbs than the hindlimbs. Orthopedic disorders were more frequent in males than in females. Orthopaedic defect phenotypes that predispose sheep and goats to lameness are of great concern due to the frequency of occurrence. Using selective breeding programmes, the abundantly available detection and corrective tools it is possible to mitigate the deleterious effects of congenital orthopedic deficiency phenotypes thereby enhancing productivity of sheep and goats in Sahel


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