Dermacentor variabilis

Definition

Dermacentor variabilis, commonly known as the American dog tick, is a hard-bodied tick that is a vector for several pathogens affecting the circulatory and lymphatic systems. It primarily transmits the bacteria responsible for Rocky Mountain spotted fever (RMSF).

5 Must Know Facts For Your Next Test

1. Dermacentor variabilis is a primary vector for Rickettsia rickettsii, the causative agent of Rocky Mountain spotted fever.
2. This tick species is found predominantly in North America, particularly in grassy and wooded areas.
3. Adult female Dermacentor variabilis ticks can lay thousands of eggs after feeding on blood from their hosts.
4. The lifecycle of Dermacentor variabilis includes four stages: egg, larva, nymph, and adult.
5. Control measures for preventing infections include using insect repellents and performing thorough tick checks after outdoor activities.

Review Questions

• What pathogen does Dermacentor variabilis primarily transmit?
• In which regions are you most likely to encounter Dermacentor variabilis?
• What are effective methods to prevent infections carried by Dermacentor variabilis?

Related terms

Rocky Mountain spotted fever:

A bacterial infection caused by Rickettsia rickettsii transmitted through tick bites.

Vector:

An organism that transmits pathogens from one host to another.

Insect repellent: A substance applied to skin or clothing to deter insects from biting.