New data on the occurrence of #Dermacentor reticulatus, #Dermacentor marginatus, and #Ixodes frontalis (Ixodida: Ixodidae) in Germany Publication date: May 2026 Source: #ticks and #tick-borne Diseases, Volume 17, Issue 3 Author(s): Nina Król, Andrea Springer, Alexander Lindau, Anna Obiegala, Katrin Fachet-Lehmann, Daniel Kämmer, Ingrid Bulling, Steffen Knoll, Dominik Fischer, Luisa Fischer, Marco Drehmann, Lidia Chitimia-Dobler, Olaf Kahl, Christina Strube, Ute Mackenstedt, Martin Pfeffer

New data on the occurrence of #Dermacentor reticulatus, #Dermacentor marginatus, and #Ixodes frontalis (Ixodida: Ixodidae) in Germany Ticks&TBD

New data on the occurrence of #Dermacentor reticulatus, #Dermacentor marginatus, and #Ixodes frontalis (Ixodida: Ixodidae) in Germany Publication date: May 2026 Source: #ticks and #tick-borne Diseases, Volume 17, Issue 3 Author(s): Nina Król, Andrea Springer, Alexander Lindau, Anna Obiegala, Katrin Fachet-Lehmann, Daniel Kämmer, Ingrid Bulling, Steffen Knoll, Dominik Fischer, Luisa Fischer, Marco Drehmann, Lidia Chitimia-Dobler, Olaf Kahl, Christina Strube, Ute Mackenstedt, Martin Pfeffer

New data on the occurrence of #Dermacentor reticulatus, #Dermacentor marginatus, and #Ixodes frontalis (Ixodida: Ixodidae) in Germany Ticks&TBD

In vitro assessment of entomopathogenic potential of Clonostachys rosea (Ascomycota: Hypocreales) against #Ixodes scapularis (Acari: Ixodidae) and #Dermacentor variabilis (Acari: Ixodidae) #ticks Publication date: January 2026 Source: #ticks and #tick-borne Diseases, Volume 17, Issue 1 Author(s): Luis Adriano Anholeto, Creighton Malkiah Jarvis, Laura Ferguson, Nicoletta Faraone

In vitro assessment of entomopathogenic potential of Clonostachys rosea (Ascomycota: Hypocreales) against #Ixodes scapularis (Acari: Ixodidae) and #Dermacentor variabilis (Acari: Ixodidae) #ticks Ticks&TBD

An insight into the ovary and midgut transcriptome of #Dermacentor nitens #tick Publication date: January 2026 Source: #ticks and #tick-borne Diseases, Volume 17, Issue 1 Author(s): Stephen Lu, Christopher F. Bosio, Vinicius Andrade-Silva, Ially de Almeida Moura, Giancarlo Bomfim Ribeiro, Markus Berger, Wendell Marcelo De Souza Perinotto, Itabajara da Silva Vaz Junior, Lucas Tirloni

An insight into the ovary and midgut transcriptome of #Dermacentor nitens #tick Ticks&TBD

In vitro assessment of entomopathogenic potential of Clonostachys rosea (Ascomycota: Hypocreales) against #Ixodes scapularis (Acari: Ixodidae) and #Dermacentor variabilis (Acari: Ixodidae) #ticks Publication date: January 2026 Source: #ticks and #tick-borne Diseases, Volume 17, Issue 1 Author(s): Luis Adriano Anholeto, Creighton Malkiah Jarvis, Laura Ferguson, Nicoletta Faraone

In vitro assessment of entomopathogenic potential of Clonostachys rosea (Ascomycota: Hypocreales) against #Ixodes scapularis (Acari: Ixodidae) and #Dermacentor variabilis (Acari: Ixodidae) #ticks Ticks&TBD

An insight into the ovary and midgut transcriptome of #Dermacentor nitens #tick Publication date: January 2026 Source: #ticks and #tick-borne Diseases, Volume 17, Issue 1 Author(s): Stephen Lu, Christopher F. Bosio, Vinicius Andrade-Silva, Ially de Almeida Moura, Giancarlo Bomfim Ribeiro, Markus Berger, Wendell Marcelo De Souza Perinotto, Itabajara da Silva Vaz Junior, Lucas Tirloni

An insight into the ovary and midgut transcriptome of #Dermacentor nitens #tick Ticks&TBD

Tickborne microorganisms in #Dermacentor andersoni (Acari: Ixodidae) in the Bitterroot Mountains of Western Montana Publication date: November 2025 Source: #ticks and #tick-borne Diseases, Volume 16, Issue 6 Author(s): K.L. Clark, J. Villegas Nunez, C. Gentry, A. Gibson, H. Husein, R. Burstein, K. Hamm

Tickborne microorganisms in #Dermacentor andersoni (Acari: Ixodidae) in the Bitterroot Mountains of Western Montana Ticks&TBD

Tickborne microorganisms in #Dermacentor andersoni (Acari: Ixodidae) in the Bitterroot Mountains of Western Montana Publication date: November 2025 Source: #ticks and #tick-borne Diseases, Volume 16, Issue 6 Author(s): K.L. Clark, J. Villegas Nunez, C. Gentry, A. Gibson, H. Husein, R. Burstein, K. Hamm

Tickborne microorganisms in #Dermacentor andersoni (Acari: Ixodidae) in the Bitterroot Mountains of Western Montana Ticks&TBD

Distribution of #Dermacentor andersoni Stiles and #Dermacentor variabilis (Say) (Acari: Ixodidae) in western Canada based on active surveillance AbstractA total of 454 unique sites in western Canada were drag sampled for host-seeking #Dermacentor species. #Dermacentor andersoni Stiles was detected in British Columbia, Alberta, and Saskatchewan, while D. variabilis (Say) was detected in all four provinces. #Dermacentor similis (Lado et al.) was collected from two sites in British Columbia. #Dermacentor andersoni was detected as far east as −103.53° and as far north as 52.38° at elevations from 500 m to 1,231 m. #Dermacentor variabilis was detected as far west as −110.9° and as far north as 54.78° at elevations from 200 to 1,200 m. Logistic regression indicated that prevalence of D. andersoni decreased with latitude, increased in the west, and increased with elevation to 900 m, then, declined. Prevalence of D. variabilis decreased with latitude, increased eastwards, and declined as elevation increased. Relationships with environmental variables were developed and indicated that mean winter temperature (Jan.–Mar.), summer temperature (Jul.–Sept.) and total winter precipitation affected both species. #Dermacentor andersoni occurred at sites with mean winter temperatures between −10.4 °C and 1.4 °C, while most D. variabilis occurred at sites with winter temperatures between −15.0 °C and −7.9 °C. Prevalence of both species increased as summer and winter temperatures increased. Prevalence of D. andersoni also declined as total summer precipitation increased, consistent with it being a xerophilic species. Prevalence was also influenced by ecoregion and soil variables. Models had good fit, low bias, and good discrimination. Results will be useful for forecasting distribution and presence of these #tick species throughout western Canada.

Distribution of #Dermacentor andersoni Stiles and #Dermacentor variabilis (Say) (Acari: Ixodidae) in western Canada based on active surveillance JMedEnt

Distribution of #Dermacentor andersoni Stiles and #Dermacentor variabilis (Say) (Acari: Ixodidae) in western Canada based on active surveillance AbstractA total of 454 unique sites in western Canada were drag sampled for host-seeking #Dermacentor species. #Dermacentor andersoni Stiles was detected in British Columbia, Alberta, and Saskatchewan, while D. variabilis (Say) was detected in all four provinces. #Dermacentor similis (Lado et al.) was collected from two sites in British Columbia. #Dermacentor andersoni was detected as far east as −103.53° and as far north as 52.38° at elevations from 500 m to 1,231 m. #Dermacentor variabilis was detected as far west as −110.9° and as far north as 54.78° at elevations from 200 to 1,200 m. Logistic regression indicated that prevalence of D. andersoni decreased with latitude, increased in the west, and increased with elevation to 900 m, then, declined. Prevalence of D. variabilis decreased with latitude, increased eastwards, and declined as elevation increased. Relationships with environmental variables were developed and indicated that mean winter temperature (Jan.–Mar.), summer temperature (Jul.–Sept.) and total winter precipitation affected both species. #Dermacentor andersoni occurred at sites with mean winter temperatures between −10.4 °C and 1.4 °C, while most D. variabilis occurred at sites with winter temperatures between −15.0 °C and −7.9 °C. Prevalence of both species increased as summer and winter temperatures increased. Prevalence of D. andersoni also declined as total summer precipitation increased, consistent with it being a xerophilic species. Prevalence was also influenced by ecoregion and soil variables. Models had good fit, low bias, and good discrimination. Results will be useful for forecasting distribution and presence of these #tick species throughout western Canada.

Distribution of #Dermacentor andersoni Stiles and #Dermacentor variabilis (Say) (Acari: Ixodidae) in western Canada based on active surveillance JMedEnt

Molecular detection of Rickettsia felis in #Dermacentor albipictus from Mississippi Abstract#Dermacentor albipictus (Packard), the winter #tick, is a one-host #tick often found in high numbers on horses, moose, elk, and deer in the northern United States and parts of Canada. In Mississippi, there have been very few collections of D. albipictus. Herein we report the collection and molecular screening of 5 male specimens and 3 nymphs of the winter #tick for rickettsial organisms. Broad PCR screening using a PanRickettsia TaqMan PCR assay targeting a portion of the 23 s gene was utilized, and a family-wide Anaplasmataceae SYBR real-time PCR assay was chosen for initial screening of #tick eluates. PanRickettsia PCR-positive samples were then amplified using a conventional PCR targeting the citrate synthase (gltA) gene for species identification. One resultant amplicon was 99.75% identical to Rickettsia felis DNA. This is the first report of R. felis in the winter #tick, D. albipictus.

Molecular detection of Rickettsia felis in #Dermacentor albipictus from Mississippi JMedEnt

Molecular detection of Rickettsia felis in #Dermacentor albipictus from Mississippi Abstract#Dermacentor albipictus (Packard), the winter #tick, is a one-host #tick often found in high numbers on horses, moose, elk, and deer in the northern United States and parts of Canada. In Mississippi, there have been very few collections of D. albipictus. Herein we report the collection and molecular screening of 5 male specimens and 3 nymphs of the winter #tick for rickettsial organisms. Broad PCR screening using a PanRickettsia TaqMan PCR assay targeting a portion of the 23 s gene was utilized, and a family-wide Anaplasmataceae SYBR real-time PCR assay was chosen for initial screening of #tick eluates. PanRickettsia PCR-positive samples were then amplified using a conventional PCR targeting the citrate synthase (gltA) gene for species identification. One resultant amplicon was 99.75% identical to Rickettsia felis DNA. This is the first report of R. felis in the winter #tick, D. albipictus.

Molecular detection of Rickettsia felis in #Dermacentor albipictus from Mississippi JMedEnt

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#reuzenteek #hyalomma #vlekkenteek #dermacentor #nvwa #cmv #vectoren

Current and future ecological niche of #Dermacentor similis Lado (Acari: Ixodidae) in western North America Abstract#Dermacentor similis Lado (Acari: Ixodidae) is a newly described #tick species within western North America. These #ticks were previously referred to as “western #Dermacentor variabilis (Say)” and were genetically distinct from D. variabilis in eastern North America. Despite the known genetic differences, the ecology of this species was not investigated separately from eastern populations of D. variabilis. Therefore, the objectives of this study were to describe the current and future areas of ecological suitability of D. similis in western North America, and to determine the bioclimatic and environmental variables of importance for ecological suitability of this species. Twenty-nine confirmed samples of D. similis from the western United States (California, Oregon, Washington, Idaho) and Canada (British Columbia) were used in species distribution model creation via MaxEnt. Seven variables were included in the final current species distribution model of D. similis: terrestrial ecoregion, degree-days below zero degrees Celsius, Hogg’s climate moisture index, mean annual relative humidity, day of the year on which the frost-free period begins, precipitation as snow, and extreme maximum temperature over thirty years. Under current conditions, high levels of ecological suitability were observed in the Okanagan region of British Columbia, Washington (extending into Oregon and Idaho), and regions of coastal and inland California. Future ecological suitability were similar to the current ecological suitability under both climate scenarios (2041 to 2070, SSP2-4.5 and SSP3-7.0). The results of this study will inform public and animal health messaging and awareness.

Current and future ecological niche of #Dermacentor similis Lado (Acari: Ixodidae) in western North America JMedEnt

Vector of the Month: #Dermacentor #reticulatus (#meadow #tick; #ornate #dog tick), a three-host tick in Europe & Asia transmitting #babesiosis in dogs, #equine #piroplasmosis, and tick-borne #lymphadenitis in humans, authored by Andrea Springer & Christina Strube.

www.cell.com/trends/paras...

#Dermacentor #ticks and their human #pathogens in various ecosystems of eastern France Publication date: July 2025 Source: #ticks and #tick-borne Diseases, Volume 16, Issue 4 Author(s): C. Barthel, J. Stynen, M. Grau, M-L. Poulle, P. Bauda, N. Boulanger

#Dermacentor #ticks and their human #pathogens in various ecosystems of eastern France Ticks&TBD

Current and future ecological niche of #Dermacentor similis Lado (Acari: Ixodidae) in western North America Abstract#Dermacentor similis Lado (Acari: Ixodidae) is a newly described #tick species within western North America. These #ticks were previously referred to as “western #Dermacentor variabilis (Say)” and were genetically distinct from D. variabilis in eastern North America. Despite the known genetic differences, the ecology of this species was not investigated separately from eastern populations of D. variabilis. Therefore, the objectives of this study were to describe the current and future areas of ecological suitability of D. similis in western North America, and to determine the bioclimatic and environmental variables of importance for ecological suitability of this species. Twenty-nine confirmed samples of D. similis from the western United States (California, Oregon, Washington, Idaho) and Canada (British Columbia) were used in species distribution model creation via MaxEnt. Seven variables were included in the final current species distribution model of D. similis: terrestrial ecoregion, degree-days below zero degrees Celsius, Hogg’s climate moisture index, mean annual relative humidity, day of the year on which the frost-free period begins, precipitation as snow, and extreme maximum temperature over thirty years. Under current conditions, high levels of ecological suitability were observed in the Okanagan region of British Columbia, Washington (extending into Oregon and Idaho), and regions of coastal and inland California. Future ecological suitability were similar to the current ecological suitability under both climate scenarios (2041 to 2070, SSP2-4.5 and SSP3-7.0). The results of this study will inform public and animal health messaging and awareness.

Current and future ecological niche of #Dermacentor similis Lado (Acari: Ixodidae) in western North America JMedEnt

#Dermacentor #ticks and their human #pathogens in various ecosystems of eastern France Publication date: July 2025 Source: #ticks and #tick-borne Diseases, Volume 16, Issue 4 Author(s): C. Barthel, J. Stynen, M. Grau, M-L. Poulle, P. Bauda, N. Boulanger

#Dermacentor #ticks and their human #pathogens in various ecosystems of eastern France Ticks&TBD

Environmental factors determining the survival of winter #ticks (#Dermacentor albipictus) at different life stages in Québec, Canada Publication date: July 2025 Source: #ticks and #tick-borne Diseases, Volume 16, Issue 4 Author(s): Morgane Le Goff, Christian Dussault, Julien H. Richard, Steeve D. Côté

Environmental factors determining the survival of winter #ticks (#Dermacentor albipictus) at different life stages in Québec, Canada Ticks&TBD

Environmental factors determining the survival of winter #ticks (#Dermacentor albipictus) at different life stages in Québec, Canada Publication date: July 2025 Source: #ticks and #tick-borne Diseases, Volume 16, Issue 4 Author(s): Morgane Le Goff, Christian Dussault, Julien H. Richard, Steeve D. Côté

Environmental factors determining the survival of winter #ticks (#Dermacentor albipictus) at different life stages in Québec, Canada Ticks&TBD

The #dogtick, #Dermacentor #variabilis, is a major vector of Rocky Mountain Spotted Fever #RMSF in the Eastern United States.

#dogtick #dermacentor
leukopenia + thrombocytopenia
-possibility of rocky mountain spotted fever #RMSF & ehrlichiosis (E. canis) from dog ticks
-Patients with RMSF may have either low or elevated wbc

New research in #RESMedVetEnt reports on the high prevalence of #Rickettsia spp. among moderately dense population of #Dermacentor reticulatus ticks in South-central Poland
doi.org/10.1111/mve.12817

#InsectVectors #Ticks #TickBorneDiseases
@wiley.com

First report of Haemaphysalis bispinosa, molecular-geographic relationships of #Ixodes granulatus and a new #Dermacentor species from Vietnam CONCLUSIONS: Haemaphysalis bispinosa shows genetic homogeneity in the whole of South and Southeast Asia, probably owing to its frequent association with domestic ruminants and dogs (i.e. frequently transported hosts). However, I. granulatus, the Asian rodent tick, has a mixed geographical pattern of haplotypes, probably because it may associate with either synanthropic or wild-living rodents as primary hosts. This tick species is recorded here, for the first time to our knowledge, as...

First report of Haemaphysalis bispinosa, molecular-geographic relationships of #Ixodes granulatus and a new #Dermacentor species from Vietnam PubMed_

First report of Haemaphysalis bispinosa, molecular-geographic relationships of #Ixodes granulatus and a new #Dermacentor species from Vietnam CONCLUSIONS: Haemaphysalis bispinosa shows genetic homogeneity in the whole of South and Southeast Asia, probably owing to its frequent association with domestic ruminants and dogs (i.e. frequently transported hosts). However, I. granulatus, the Asian rodent tick, has a mixed geographical pattern of haplotypes, probably because it may associate with either synanthropic or wild-living rodents as primary hosts. This tick species is recorded here, for the first time to our knowledge, as...

First report of Haemaphysalis bispinosa, molecular-geographic relationships of #Ixodes granulatus and a new #Dermacentor species from Vietnam PubMed_

Determining the photic chronotype in locomotor activity and levels of endogenous control in the American #dog #tick (#Dermacentor variabilis) Publication date: March 2025 Source: #ticks and #tick-borne Diseases, Volume 16, Issue 2 Author(s): Joseph Giulian, Natalia Toporikova, Jessica Petko, Nadia Ayoub, Thomas C. Jones, Darrell Moore

Determining the photic chronotype in locomotor activity and levels of endogenous control in the American #dog #tick (#Dermacentor variabilis) Ticks&TBD

Determining the photic chronotype in locomotor activity and levels of endogenous control in the American #dog #tick (#Dermacentor variabilis) Publication date: March 2025 Source: #ticks and #tick-borne Diseases, Volume 16, Issue 2 Author(s): Joseph Giulian, Natalia Toporikova, Jessica Petko, Nadia Ayoub, Thomas C. Jones, Darrell Moore

Determining the photic chronotype in locomotor activity and levels of endogenous control in the American #dog #tick (#Dermacentor variabilis) Ticks&TBD

Genetic diversity and phylogeographic relationships of #Dermacentor variabilis (Acari: Ixodidae) within an established population in southern Manitoba (Canada), and the prevalence of Rickettsia montanensis and Francisella-like endosymbionts AbstractThe primary objective of this study was to determine if DNA sequences of the mitochondrial (mt) cytochrome oxidase c subunit 1 gene (cox1) and/or the mt 16S ribosomal RNA (rRNA) gene can be used to study the population genetics and phylogeography of the American dog #tick, #Dermacentor variabilis (Say). DNA sequences were determined for 200 adult #ticks collected from an established population in a region of Manitoba (Canada) where there have been recent outbreaks of bovine anaplasmosis. Given this, a secondary objective was to test these #ticks for the presence of Anaplasma marginale Theiler and 2 other bacterial pathogens, Rickettsia rickettsii Brumpt and Francisella tularensis (McCoy and Chapin 1912) Dorofe’ev 1947. However, no #ticks were PCR-positive for these bacteria, whereas 15% of #ticks were PCR-positive for R. montanensis Weiss and Moulder and 96% contained Francisella-like endosymbionts. Nucleotide and haplotype diversity among #ticks was greater for cox1 than the 16S rRNA gene, thus cox1 is more useful for examining the genetic diversity within and among D. variabilis populations. The 33 cox1 haplotypes could be separated into 3 haplogroups, but when combined with sequence data from GenBank, 6 clades were evident, 2 of which comprised #ticks from primarily Saskatchewan, Manitoba, western Ontario, South Dakota, and Wisconsin. These findings indicate that cox1 can be used to understand the phylogeography of D. variabilis, but more sequences are needed from individuals in other populations across geographical range of this #tick species, particularly those on the Canadian prairies where D. variabilis is undergoing range expansion.

Genetic diversity and phylogeographic relationships of #Dermacentor variabilis (Acari: Ixodidae) within an established population in southern Manitoba (Canada), and the prevalence of Rickettsia montanensis and Francisella-like endosymbionts JMedEnt

Genetic diversity and phylogeographic relationships of #Dermacentor variabilis (Acari: Ixodidae) within an established population in southern Manitoba (Canada), and the prevalence of Rickettsia montanensis and Francisella-like endosymbionts AbstractThe primary objective of this study was to determine if DNA sequences of the mitochondrial (mt) cytochrome oxidase c subunit 1 gene (cox1) and/or the mt 16S ribosomal RNA (rRNA) gene can be used to study the population genetics and phylogeography of the American dog #tick, #Dermacentor variabilis (Say). DNA sequences were determined for 200 adult #ticks collected from an established population in a region of Manitoba (Canada) where there have been recent outbreaks of bovine anaplasmosis. Given this, a secondary objective was to test these #ticks for the presence of Anaplasma marginale Theiler and 2 other bacterial pathogens, Rickettsia rickettsii Brumpt and Francisella tularensis (McCoy and Chapin 1912) Dorofe’ev 1947. However, no #ticks were PCR-positive for these bacteria, whereas 15% of #ticks were PCR-positive for R. montanensis Weiss and Moulder and 96% contained Francisella-like endosymbionts. Nucleotide and haplotype diversity among #ticks was greater for cox1 than the 16S rRNA gene, thus cox1 is more useful for examining the genetic diversity within and among D. variabilis populations. The 33 cox1 haplotypes could be separated into 3 haplogroups, but when combined with sequence data from GenBank, 6 clades were evident, 2 of which comprised #ticks from primarily Saskatchewan, Manitoba, western Ontario, South Dakota, and Wisconsin. These findings indicate that cox1 can be used to understand the phylogeography of D. variabilis, but more sequences are needed from individuals in other populations across geographical range of this #tick species, particularly those on the Canadian prairies where D. variabilis is undergoing range expansion.

Genetic diversity and phylogeographic relationships of #Dermacentor variabilis (Acari: Ixodidae) within an established population in southern Manitoba (Canada), and the prevalence of Rickettsia montanensis and Francisella-like endosymbionts JMedEnt