Detection of <i>Rickettsia montanensis</i> in <i>Dermacentor variabilis</i> in Northern Wisconsin

Vincent, Geoffrey P.; Hulstrand, Alissa M.

doi:10.1089/vbz.2022.0055

Cited by 2 publications

(3 citation statements)

References 10 publications

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“…In this study, updated passive surveillance data yielded only 19 novel spatially unique records of infected ticks after thinning. To contrast, a recent study that targeted a discrete area in Northern Wisconsin, an area of low predicted suitability in our models, successfully detected R. montanensis in D. variabilis (Vincent and Hulstrand, 2022). Focused testing efforts, particularly in locations bordering areas of range disagreement, may help resolve the limits of exposure risk and facilitate targeted monitoring efforts.…”

Section: Discussioncontrasting

confidence: 58%

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Newer Surveillance Data Extends our Understanding of the Niche ofRickettsia montanensis(Rickettsiales: Rickettsiaceae) Infection of the American Dog Tick (Acari: Ixodidae) in the United States

Lippi

Gaff

Nadolny

et al. 2023

Preprint

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Background: Understanding the geographic distribution of Rickettsia montanensis infections inDermacentor variabilisis important for tick-borne disease management in the United States, as both a tick-borne agent of interest and a potential confounder in surveillance of other rickettsial diseases. Two previous studies modeled niche suitability forD. variabiliswith and withoutR. montanensis, from 2002-2012, indicating that theD. variabilisniche is an overestimate of the infected niche. This study updates these, adding data since 2012. Methods: Newer surveillance and testing data were used to update Species Distribution Models (SDMs) ofD. variabilis, andR. montanensisinfectedD. variabilis, in the United States. Using random forest (RF) models, found to perform best in previous work, we updated the SDMs and compared them with prior results. Warren's I niche overlap metric was used to compare between predicted suitability for all ticks and "pathogen positive niche" models across datasets. Results: Warren's I indicated <2% change in predicted niche, and there was no change in order of importance of environmental predictors, forD. variabilisorR. montanensispositive niche. The updatedD. variabilisniche model overpredicted suitability compared to the updatedR. montanensispositive niche in key peripheral parts of the range, but slightly underpredicted through the northern and midwestern parts of the range. This reinforces previous findings of a more constrained pathogen-positive niche than predicted byD. variabilisrecords alone. Conclusions: The consistency of predicted niche suitability forD. variabilisin the United States, with the addition of nearly a decade of new data, corroborates this is a species with generalist habitat requirements. Yet a slight shift in updated niche distribution, even of low suitability, included more southern areas, pointing to a need for continued and extended monitoring and surveillance. This further underscores the importance of revisiting vector and vector-borne disease distribution maps.

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Section: Discussioncontrasting

confidence: 58%

“…Wisconsin, an area of low predicted suitability in our models, successfully detected R. montanensis in D. variabilis (Vincent and Hulstrand, 2022). Focused testing efforts, particularly in locations bordering areas of range disagreement, may help resolve the limits of exposure risk and facilitate targeted monitoring efforts.…”

Section: Discussionmentioning

confidence: 84%

Newer Surveillance Data Extends our Understanding of the Niche ofRickettsia montanensis(Rickettsiales: Rickettsiaceae) Infection of the American Dog Tick (Acari: Ixodidae) in the United States

Lippi

Gaff

Nadolny

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…In this study, updated passive surveillance data yielded only 19 novel spatially unique records of infected ticks after thinning. To contrast, a recent study that targeted a discrete area in Northern Wisconsin, an area of low predicted suitability in our models, successfully detected R. montanensis in D. variabilis (Vincent and Hulstrand, 2022 ). Focused testing efforts, particularly in locations bordering areas of range disagreement, may help resolve the limits of exposure risk and facilitate targeted monitoring efforts.…”

Section: Discussionmentioning

confidence: 55%

Newer Surveillance Data Extends our Understanding of the Niche of Rickettsia montanensis (Rickettsiales: Rickettsiaceae) Infection of the American Dog Tick (Acari: Ixodidae) in the United States

Lippi

Gaff

Nadolny

et al. 2023

Vector-Borne and Zoonotic Diseases

View full text Add to dashboard Cite

Background: Understanding the geographic distribution of Rickettsia montanensis infections in Dermacentor variabilis is important for tick-borne disease management in the United States, as both a tick-borne agent of interest and a potential confounder in surveillance of other rickettsial diseases. Two previous studies modeled niche suitability for D. variabilis with and without R. montanensis , from 2002 to 2012, indicating that the D. variabilis niche overestimates the infected niche. This study updates these, adding data since 2012. Methods: Newer surveillance and testing data were used to update Species Distribution Models (SDMs) of D. variabilis , and R. montanensis -infected D. variabilis , in the United States. Using random forest models, found to perform best in previous work, we updated the SDMs and compared them with prior results. Warren's I niche overlap metric was used to compare between predicted suitability for all ticks and “ R. montanensis -positive niche” models across datasets. Results: Warren's I indicated <2% change in predicted niche, and there was no change in order of importance of environmental predictors, for D. variabilis or R. montanensis -positive niche. The updated D. variabilis niche model overpredicted suitability compared with the updated R. montanensis -positive niche in key peripheral parts of the range, but slightly underpredicted through the northern and midwestern parts of the range. This reinforces previous findings of a more constrained R. montanensis -positive niche than predicted by D. variabilis records alone. Conclusions: The consistency of predicted niche suitability for D. variabilis in the United States, with the addition of nearly a decade of new data, corroborates this is a species with generalist habitat requirements. Yet a slight shift in updated niche distribution, even of low suitability, included more southern areas, pointing to a need for continued and extended monitoring and surveillance. This further underscores the importance of revisiting vector and vector-borne disease distribution maps.

show abstract

Detection of Rickettsia montanensis in Dermacentor variabilis in Northern Wisconsin

Cited by 2 publications

References 10 publications

Newer Surveillance Data Extends our Understanding of the Niche ofRickettsia montanensis(Rickettsiales: Rickettsiaceae) Infection of the American Dog Tick (Acari: Ixodidae) in the United States

Newer Surveillance Data Extends our Understanding of the Niche ofRickettsia montanensis(Rickettsiales: Rickettsiaceae) Infection of the American Dog Tick (Acari: Ixodidae) in the United States

Newer Surveillance Data Extends our Understanding of the Niche of Rickettsia montanensis (Rickettsiales: Rickettsiaceae) Infection of the American Dog Tick (Acari: Ixodidae) in the United States

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