The primary risks vary by tick species. Blacklegged ticks are the most dangerous to humans, with up to 50% of adults carrying Lyme disease. Lone star ticks can trigger alpha-gal syndrome and transmit Ehrlichiosis and Tularemia. Asian longhorned ticks, while not a major human health threat, can cause severe blood loss in pets due to their clustering behavior. American dog ticks are less harmful but can still transmit diseases like Rocky Mountain Spotted Fever. Pets and livestock are particularly vulnerable to longhorned ticks, which reproduce rapidly and spread quickly. Human exposure is highest in wooded, grassy, or coastal areas, especially during dawn and dusk when ticks are most active.