In the Americas, Ixodes scapularis is the most common vector. This hard tick, commonly known as a deer tick, is also the vector for other tick-associated illnesses, such as Lyme disease. Many species of Babesia only infect nonhuman mammalian hosts, most commonly cattle, horses, and sheep.
In the Americas, Ixodes scapularis, a type of hard tick called a deer tick, is the primary carrier of various tick-borne diseases, including Lyme disease.  Many Babesia species only infect animals other than humans, with cattle, horses, and sheep being common hosts.