The scutum on male American dog ticks covers most of the dorsal surface bearing the same white markings. An engorged female ...

Hard ticks, such as the American dog tick, have hard shells and are often ... After draining blood from an animal, ticks will become engorged and their body will swell up. Adult and nymph ticks ...

By 1921, Dodd had established a definitive link between an engorged tick and clinical disease in 3 dogs, and showed that it took 5-6 days after attachment for clinical signs to develop ...