Resistance to worming treatment is an increasing concern amongst horse owners. Resistance occurs because a very small percentage of worms always had a genetic ability to survive chemical treatment; a strategic approach to worming is important to minimise the risk of resistance occurring.
Reasons for resistance:
<ul>
<li>Worming too frequently can increase chances of resistance. </li>
<li>Under-dosing or using the incorrect active ingredient can increase chances of resistance </li>
<li>If an infestation of worms is not exposed or affected by treatment, resistance amongst this population can occur slowly over time. </li>
<li>Overgrazing and overstocking of pastures can increase resistance amongst the parasitic populations.  </li>
</ul>
 
The content of this article should not be considered, or used as a substitute for, veterinary medical advice, diagnosis or treatment.&nbsp;

Resistance to worming treatment is an increasing concern amongst horse owners. Resistance occurs because a very small percentage of worms always had a genetic ability to survive chemical treatment; a strategic approach to worming is important to minimise the risk of resistance occurring.
Reasons for resistance:
Worming too frequently can increase chances of resistance. 
Under-dosing or using the incorrect active ingredient can increase chances of resistance 
If an infestation of worms is not exposed or affected by treatment, resistance amongst this population can occur slowly over time. 
Overgrazing and overstocking of pastures can increase resistance amongst the parasitic populations.  


The content of this article should not be considered, or used as a substitute for, veterinary medical advice, diagnosis or treatment. 

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