Major Tick-Borne Diseases in the United States

by lmatthews on May 8, 2012

Major tick-borne diseases in the United States are an increasingly common cause of visits to physicians, many of whom lack experience with these types of pathogens and clinical presentations. How familiar are you with the symptoms of Lyme disease, Rickettsia, Tularemia, and could you tell if a patient was infected with more than one bacterium, virus, or protozoic organism?


Major Tick-Borne Diseases in the United States

Disease

Organism

Vector

Region

Lyme Disease

Borrelia burgdorferi Ixodes scapularis
(= I. dammini)
I. pacificus
Northeast, Midwest,
Mid-Atlantic
West Coast

Rocky Mountain Spotted Fever

Rickettsia rickettsii Dermacentor variabilis
D. andersoni
East, South
West

Babesiosis

Babesia microti
B. equi
I. scapularis
I. pacificus
Northeast
West Coast

Ehrlichiosis

Ehrlichia chafeensis
E. equi
D. variabilis Amblyomma
americanum
I. scapularis
South-Atlantic
South-Central

Relapsing Fever

Borrelia species Ornithodoros species West

Colorado Tick Fever

Coltivirus D. andersoni West

Tularemia

Francisella tularensis A. americanum
D. andersoni
D. variabilis
Southeast
South-Central
West
Widespread

Tick Paralysis

Toxin D. andersoni
D. variabilis
West
East

 

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