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close this bookIntegrated Helminth Control - KARI technical note no. 2 (DFID - KARI, 1999, 54 p.)
close this folderPART FOUR - The Strategies
View the documentTreating only clinical cases
View the documentAnaemia Diagnosis
View the documentSeasonal Anthelmintic Use
View the documentRapid Rotation
View the documentDose & Move
View the documentMedicated Feed Blocks
View the documentToxocara Treatment
View the documentUse of narrow spectrum drugs
View the documentAlternate Grazing
View the documentBoma Rotation
View the documentUse of genetic resistance
View the documentMixed use of broad and narrow spectrum drugs
View the documentCropping Rotation
View the documentSeasonal Fluke Treatment

Use of genetic resistance

It has been shown that some breeds of animal are less susceptible to worms than others. Thus indigenous fat-tailed sheep are often more resistant than exotic types. Where losses to helminths are difficult (or expensive) to control, the use of these animals can minimise the need for other control strategies. Using indigenous fat-tailed rams for crossing into an existing flock can produce not only an improved resistance to worms but also introduce the benefits of hybrid vigour and increased hardiness to other conditions.