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Category: Viruses and Viral Pathogenesis
Colorado Tick Fever and Other Arthropod Borne Reoviridae, Page 1 of 2
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Among arthropod-borne viral infections, Colorado tick fever is second in incidence in North America only to West Nile fever (1). As with other viruses, evidence of infection by arthropod-borne reoviruses, including many newly identified viruses, as the cause of both human and veterinary disease continues to accumulate. This likely reflects advances in detection and diagnostic methods and perhaps also evolving demographic conditions that facilitate contact between human populations and the insect vectors that transmit these viral infections. The clinical importance of reoviruses will doubtless continue to change in the wake of the emergence of other arthropod borne infections such as Zika and dengue viruses.
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Relationship between members of Coltivirus, Seadornavirus, and Orbivirus with other Reoviridae based on phylogenetic analysis of the viral polymerase sequence (VP1). Each forms a distinct sequence cluster. Seadornaviruses appear most closely related to rotaviruses. KDV, Kadipiro virus; BAV, Banna virus; SCRV, St. Croix River virus; AHSV, African horse sickness virus; CHUV, Chuzan virus; BTV, Bluetongue virus; YUOV, Yunnan orbivirus; PHSV, Peruvian horse sickness virus; CTFV, Colorado tick fever virus; EYAV, Eyach virus; BoRV, Bovine rotavirus; SiRV, Simian rotavirus; PoRV, Porcine rotavirus; Hu/MuRV, Human/Murine rotavirus. Tree generated using MEGA 4 with a neighbor-joining method. Values at the nodes indicate bootstrap confidence. Bar, genetic distance or approximate number of substitutions per site. (Reprinted from reference 30 with permission of the publisher.)
Relationship between members of Coltivirus, Seadornavirus, and Orbivirus with other Reoviridae based on phylogenetic analysis of the viral polymerase sequence (VP1). Each forms a distinct sequence cluster. Seadornaviruses appear most closely related to rotaviruses. KDV, Kadipiro virus; BAV, Banna virus; SCRV, St. Croix River virus; AHSV, African horse sickness virus; CHUV, Chuzan virus; BTV, Bluetongue virus; YUOV, Yunnan orbivirus; PHSV, Peruvian horse sickness virus; CTFV, Colorado tick fever virus; EYAV, Eyach virus; BoRV, Bovine rotavirus; SiRV, Simian rotavirus; PoRV, Porcine rotavirus; Hu/MuRV, Human/Murine rotavirus. Tree generated using MEGA 4 with a neighbor-joining method. Values at the nodes indicate bootstrap confidence. Bar, genetic distance or approximate number of substitutions per site. (Reprinted from reference 30 with permission of the publisher.)
Negative contrast electron micrographs of (A) Colorado tick fever virus and (B) Banna virus (BAV). (C) Thin section of BAV-infected C6/36 cells showing viral particles (arrows) in vacuole-like structures. (Reprinted from reference 23 with permission of the publisher.)
Negative contrast electron micrographs of (A) Colorado tick fever virus and (B) Banna virus (BAV). (C) Thin section of BAV-infected C6/36 cells showing viral particles (arrows) in vacuole-like structures. (Reprinted from reference 23 with permission of the publisher.)
Distribution of Dermacentor andersoni ticks (shaded area) and number of cases of Colorado tick fever from 1990 to 1996. (Modified from reference 7 with permission of the publisher.)
Distribution of Dermacentor andersoni ticks (shaded area) and number of cases of Colorado tick fever from 1990 to 1996. (Modified from reference 7 with permission of the publisher.)
Frequency distribution by month of confirmed illness due to Colorado tick fever virus in Colorado during 1973 and 1974. (Modified from reference 56 with permission of the publisher.)
Frequency distribution by month of confirmed illness due to Colorado tick fever virus in Colorado during 1973 and 1974. (Modified from reference 56 with permission of the publisher.)
Coding organization of Coltivirus, Seadornavirus, and Orbivirus segments a , b
Symptom frequency of 320 patients suspected of having Colorado tick fever in Colorado for the years 1973 and 1974 (222 Confirmed positive and 98 negative)
Symptom frequency of 320 patients suspected of having Colorado tick fever in Colorado for the years 1973 and 1974 (222 Confirmed positive and 98 negative)
Orbiviruses that naturally infect humans a