Which tick species is known to transmit Lyme disease and is rarely found in Tennessee?

The tick species Ixodes scapularis, commonly known as the black-legged tick or deer tick, is the primary vector for Lyme disease in North America. Its role in the transmission of Lyme disease is significant because it can carry the bacterium Borrelia burgdorferi, which is responsible for the disease. In terms of its presence in Tennessee, while Ixodes scapularis can be found in some areas, it is not commonly encountered there, making its occasional presence notable in discussions about Lyme disease risk in the state.

The other species listed have different characteristics and associations. For instance, Dermacentor variabilis, known as the American dog tick, does not transmit Lyme disease but can carry other pathogens. Amblyomma americanum, or the lone star tick, is associated with other diseases but not with Lyme disease. Haemaphysalis longicornis, also known as the longhorned tick, has recently gained attention but is not known as a significant vector for Lyme disease. Thus, recognizing the specific role of Ixodes scapularis in the transmission of Lyme disease is crucial in understanding the epidemiology of the disease, particularly in discussing its prevalence or rarity in specific regions like Tennessee.