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Colorado tick fever and other arthropod-borne reoviruses 

Colorado tick fever and other arthropod-borne reoviruses
Colorado tick fever and other arthropod-borne reoviruses

M.J. Warrell

and David A. Warrell



Incidence of Colorado tick fever in Montana, Utah, and Wyoming.

Banna virus—new strains from China and clinical confusion with Japanese encephalitis.

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date: 27 September 2021

Human pathogens are found in six genera of Reoviridae: Reovirus, Rotavirus, Orthoreovirus, and three arthropod-borne genera—Coltivirus (Colorado tick fever, Salmon River virus, and Eyach viruses), Orbivirus (Kemerovo, Changuinola, Orungo, and Lebombo) and Seadornavirus (Banna virus).

Colorado tick fever—common in parts of north-western North America; acquired from tick (ixodid) bites, most often by hikers and campers, presenting 3 to 6 days later with sudden fever, rigors, generalized aches, myalgia, headache and backache, rashes (12%) and gastrointestinal symptoms (20%). Diagnosis confirmed by detection of viral antigen in erythrocytes or serum, or by serodiagnosis. Management is symptomatic. Illness usually resolves in 10 to 14 days, but convalescence may be prolonged. Prevention is by avoiding, repelling, and rapidly removing ticks; no vaccines are available....

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