Tick paralysis from Ixodes holocyclus in Australia and Dermacentor ticks in North America causes rapid ascending paralysis requiring emergency veterinary treatment.
Dogs with tick paralysis experience progressive weakness and loss of coordination causing inability to stand, swallow, or breathe effectively. Respiratory failure from diaphragm paralysis is a life-threatening welfare emergency. The progressive nature of paralysis means untreated dogs deteriorate over hours to days before respiratory failure. Australian tick paralysis cases are often more severe than North American cases and have higher mortality without antiserum treatment. Prevention through consistent use of registered tick prevention products eliminates this welfare risk.