Worm Control In Cattle

Cattle and calves treatment against worms is an important aspect of animal production. Experience has shown that mortality rates in youngstock can be up to 10% as a result of worms infestation therefore the economic loss is huge.

Clinical Signs

The adverse effect of worm infestation usually lead to economic losses which include

  • drop in fertility,
  • body weight of about 20% 
  • reduction in milk yield of up to 10%,
  • poor immunity
  • Young calves have diarrhoea and  gastroenteritis, 
  • Anaemia
  • mortality and increased cull rate

Transmission occurs when animals ingest larvae on contaminated grass while grazing which develop into adult worms after three weeks. Eggs are laid by adult worms in the animal’s intestine which are passed out in faeces, and the cycle continues.

However, lungworm and flukeworm infestation usual challenges of cattle production, but experienced farmers and veterinarians have developed plan a prevention and treatment strategy over the years by controlling lung, gut and stomach worms is to use a worming program that kills eggs, worm larvae and adult worms.


Worm control programme should be targeted towards the lung worms, stomach worms and gut worms by using anthelmintics which will prevent build up and destroy the worms at all stages. Farmers must consult an experienced veterinarians for effective control measures. 


  • good biosecurity- animals should be grazed of fields other herds have eaten to prevent transmission,
  • farmers should graze their animals on on low-risk pasture such as new fields previously grazed by adult cattle,
  • use older cattle to clean up the larvae present in high-risk fields, as older cattle have built up immunity
  • draining off wet pastures,
  • fence off marshy areas,
  • Administer dewormers effectively and based on manufacturer’s prescriptions.

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