Consider Other Parasites When Treating Cattle

• Products used to control lice will also affect other parasites.
• Treating lice can cause development of resistance in other parasites.

Most louse control products also affect other external parasites and some, most notably those containing the macrocyclic lactone compounds, also affect internal parasites. Use of these chemicals for cattle lice can also select for resistance in the other parasites. It is important to read the label to determine which parasites will be controlled. Resistance is a significant issue in ticks, buffalo flies and cattle worms so when choosing a chemical for lice control consider the possible effects of increasing selection for resistance in non-targeted parasites.