The Distribution in Oregon of Ixodes Pacificus, Dermacentor Andersoni, and Dermacentor Occidentalis with a Note on Dermacentor Variabilis (Acarina: Ixodidae)

1977 ◽  
Vol 13 (4-5) ◽  
pp. 501-506 ◽  
Author(s):  
Emmett R. Easton ◽  
James E. Keirans ◽  
Robert A. Gresbrink ◽  
Carleton M. Clifford
Keyword(s):  
Dermacentor Variabilis ◽  
Ixodes Pacificus ◽  
Dermacentor Andersoni

Ticks and Tick-Borne Diseases of Colorado, Including New State Records for Argas radiatus (Ixodida: Argasidae) and Ixodes brunneus (Ixodida: Ixodidae)

2020 ◽  
Author(s):  
H Joel Hutcheson ◽  
James W Mertins ◽  
Boris C Kondratieff ◽  
Monica M White
Keyword(s):  
Exotic Species ◽  
Rhipicephalus Sanguineus ◽  
Dermacentor Variabilis ◽  
Ixodes Pacificus ◽  
Dermacentor Andersoni ◽  
Hard Ticks ◽  
Otobius Megnini ◽  
Veterinary Importance ◽  
Host Associations ◽  
State Records

Abstract We report 28 species of ticks (Acari: Ixodida) from Colorado (CO). We include the soft ticks (Argasidae) Argas (Argas) cooleyi Kohls and Hoogstraal, Argas (Persicargas) radiatus Railliet, Carios (Alectorobius) concanensis (Cooley and Kohls), Carios (Alectorobius) kelleyi (Cooley and Kohls), Ornithodoros (Pavlovskyella) hermsi Wheeler et al., Ornithodoros (Pavlovskyella) parkeri Cooley, Ornithodoros (Pavlovskyella) turicata (Dugès), Otobius (Otobius) lagophilus Cooley and Kohls, and Otobius (Otobius) megnini (Dugès). We include the metastriate hard ticks (Ixodidae) Dermacentor (Americentor) albipictus (Packard), Dermacentor (Dermacentor) andersoni Stiles, Dermacentor (Dermacentor) parumapertus Neumann, Dermacentor (Dermacentor) variabilis (Say), Haemaphysalis (Aboimisalis) chordeilis (Packard), Haemaphysalis (Gonixodes) leporispalustris (Packard), and Rhipicephalus (Rhipicephalus) sanguineus Latreille. Prostriate hard ticks include Ixodes (Ixodiopsis) angustus Neumann, Ixodes (Phoeloioxdes) baergi Cooley and Kohls, Ixodes (Trichotoixodes) brunneus Koch, Ixodes (Scaphixodes) howelli Cooley and Kohls, Ixodes (Phoeloioxdes) kingi Bishopp, Ixodes (Phoeloioxdes) marmotae Cooley and Kohls, Ixodes (Ixodiopsis) ochotonae Gregson, Ixodes (Phoeloioxdes) sculptus Neumann, Ixodes (Ixodiopsis) soricis Gregson, Ixodes (Ixodes) spinipalpis Hadwen and Nuttall, Ixodes (Phoeloioxdes) texanus Banks, and Ixodes (Ixodiopsis) woodi Bishopp. Argas radiatus and Ixodes brunneus represent new state records. Review of collection reports revealed that inclusion of Ixodes (Multidentatus) auritulus (Neumann), Ixodes (Phoeloioxdes) cookei Packard, Ixodes (Phoeloioxdes) marxi Banks, and Ixodes (Ixodes) pacificus Cooley and Kohls is dubious or unconfirmed and, conversely, that C. concanensis and H. chordeilis have distributions that include CO. We list an additional five species occasionally detected and 13 exotic species intercepted in CO. Tick-host associations, geographical distributions, and medical/veterinary importance are included.

Experiments on Oral Secretion of the Rocky Mountain Wood Tick, Dermacentor andersoni Stiles (Acarina: Ixodidae)

1957 ◽  
Vol 89 (1) ◽  
pp. 1-5 ◽  
Author(s):  
J. D. Gregson
Keyword(s):  
British Columbia ◽  
Pacific Northwest ◽  
Rocky Mountain ◽  
Dermacentor Variabilis ◽  
Oral Secretion ◽  
Amblyomma Maculatum ◽  
Dermacentor Andersoni ◽  
The Pacific ◽  
Tick Paralysis ◽  
Rocky Mountain Wood Tick

Tick paralysis continues to be one of the most baffling and fascinating tickborne diseases in Canada. It was first reported in this country by Todd in 1912. Since then about 250 human cases, including 28 deaths, have been recorded from British Columbia. Outbreaks in cattle have affected up to 400 animals at a time, with losses in a herd as high as 65 head. Although the disease is most common in the Pacific northwest, where it is caused by the Rocky Mountain wood tick, Dermacentor andersoni Stiles, it has lately been reported as far south as Florida and has been produced by Dermacentor variabilis Say, Amblyomma maculatum Koch, and A. americanum (L.) (Gregson, 1953). The symptoms include a gradual ascending symmetrical flaccid paralysis. Apparently only man, sheep, cattle, dogs, and buffalo (one known instance) are susceptible, but even these may not necessarily be paralysed.

What Is Going on With the Genus Dermacentor? Hybridizations, Introgressions, Oh My!

2019 ◽  
Vol 57 (3) ◽  
pp. 653-656 ◽  
Author(s):  
Jerome Goddard ◽  
Michelle Allerdice ◽  
J Santos Portugal ◽  
Gail M Moraru ◽  
Christopher D Paddock ◽  
...  
Keyword(s):  
Genetic Material ◽  
Single Species ◽  
Dermacentor Variabilis ◽  
Species Concepts ◽  
Rickettsia Parkeri ◽  
Public Health Perspective ◽  
Dermacentor Andersoni ◽  
Rickettsia Rickettsii ◽  
Close Relationship ◽  
Specific Species

Abstract In the 1930s, R. A. Cooley noted that Dermacentor occidentalis (Acarina: Ixodidae) and Dermacentor andersoni were closely related and could hybridize. Decades later, James Oliver discovered that crosses of Dermacentor variabilis, D. andersoni, and D. occidentalis could, on occasion, produce hybrids. A recent molecular analysis (both mtDNA and nDNA) in our laboratory revealed that certain specimens of Dermacentor andersoni nested with Dermacentor parumapertus. Does this close relationship, along with the mito-nuclear discordance we have observed, mean D. andersoni and D. parumapertus are a single species? By contemporary taxonomic criteria, this seems improbable based on their distinctly different morphologies, host associations, and ecologies. This paper explores ideas related to mito-nuclear discordance, hybridization, and introgression (primarily) not only in these two species but also other members of the genus Dermacentor. Both D. andersoni and D. parumapertus can be found on the same hosts and have sympatric distributions, so introgression of genetic material by occasional cross-mating between these two species is possible. Further, the difficulty in applying specific species concepts in ticks has been recently pointed out and a unified agreement on an integrative species concepts could clearly be useful in this situation. With the discovery of D. parumapertus as a potential vector of Rickettsia parkeri and the historically recognized role of D. andersoni in transmission of Rickettsia rickettsii, understanding the specific status of each lineage of these species (and others in the genus) is extremely important from a public health perspective.

scholarly journals Prevalence of Rickettsia Species in Canadian Populations of Dermacentor andersoni and D. variabilis

2009 ◽  
Vol 75 (6) ◽  
pp. 1786-1789 ◽  
Author(s):  
Shaun J. Dergousoff ◽  
Andrew J. A. Gajadhar ◽  
Neil B. Chilton
Keyword(s):  
Host Specificity ◽  
Tick Species ◽  
Dermacentor Variabilis ◽  
Dermacentor Andersoni ◽  
Rickettsia Species ◽  
Rickettsia Rickettsii

ABSTRACT We determined the prevalence of rickettsiae in Dermacentor adults at 15 localities in Canada. Rickettsia rickettsii was not detected in any tick, whereas Rickettsia peacockii was present in 76% of Dermacentor andersoni adults and Rickettsia montanensis in 8% of Dermacentor variabilis adults. This host specificity was maintained in localities where both tick species occurred in sympatry.

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