Changes

**Or a product with a two week residual activity can be used

**Or a product with a two week residual activity can be used

Anopleura lice are more susceptible to systemic insecticide treatment than mallophaga lice

Anoplura lice are more susceptible to systemic insecticide treatment than mallophaga lice

*Resistance to insecticides may become a problem so alternating the chemicals used and avoiding pour on treatments (which have a greater risk of resistance developing) should be considered

*Resistance to insecticides may become a problem so alternating the chemicals used and avoiding pour on treatments (which have a greater risk of resistance developing) should be considered