How to control worms in livestock?

22nd Jul, 2019
How to control worms in livestock?
Dr Judy Kimaru, Disaster Manager for Africa at World Animal Protection (WAP) during the vaccination, deworming and treatement drive in the first week of June 2018 [Gardy Chacha/Standard]


An animal must be dewormed after every three months. Several methods can be used to defeat worms. The amount of parasites will vary with pasture season and management. Good pasture management practices will save the animals’ the burden of parasites.

The management include: Grazing younger animals on safe pastures that have not been grazed on for almost 12 months as well as feeding them on small grain feeds.

Always deworm animals before placing them on safe pastures. The less susceptible mature animals can be left to graze on the other pastures. -Do not overgraze pastures. Animals graze closer to the ground hence pick up more larvae.

De-wormers (anthelminths) are an excellent way of controlling internal parasites. They are usually available in tablet forms or as a drench and other oral liquids. Tablets require the use of a bolus gun while the liquid drugs need a drenching gun or syringe.

De wormers should be used on time to reduce the infection before symptoms occur. Treatment should also aim at interrupting the life cycle of the internal parasite in an e­ffort to minimize pasture contamination. De-wormers for treatment are normally selected based on ease of application, whether broad-spectrum, milk withdrawal periods and cost-e­ffectiveness. The de-wormers are grouped into either, -Avermectins/ milbemycins eg Ivermectin, -Benzimidazoles eg Albendazole, Avermectins/ milbemycins curb both external and internal parasites, as well as o­ffer persistent protection for days to weeks after treatment.

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