LIVIVO - Search results -

Search results

Result 1 - 8 of total 8

Search options

Article ; Online: Surveillance and genetic data support the introduction and establishment of Aedes albopictus in Iowa, USA.

Hall, David R / Tokarz, Ryan E / Field, Eleanor N / Smith, Ryan C

2022 Volume 12, Issue 1, Page(s) 2143

Abstract: Aedes albopictus is a competent vector of several arboviruses that has spread throughout the United States over the last three decades. With the emergence of Zika virus in the Americas in 2015-2016 and an increased need to understand the current ... ...

Abstract	Aedes albopictus is a competent vector of several arboviruses that has spread throughout the United States over the last three decades. With the emergence of Zika virus in the Americas in 2015-2016 and an increased need to understand the current distributions of Ae. albopictus in the US, we initiated surveillance efforts to determine the abundance of invasive Aedes species in Iowa. Here, we describe surveillance efforts from 2016 to 2020 in which we detect stable and persistent populations of Aedes albopictus in three Iowa counties. Based on temporal patterns in abundance and genetic analysis of mitochondrial DNA haplotypes between years, our data support that Ae. albopictus are overwintering and have likely become established in the state. The localization of Ae. albopictus predominantly in areas of urbanization, and noticeable absence in rural areas, suggests that these ecological factors may contribute to overwintering success. Together, these data document the establishment of Ae. albopictus in Iowa and their expansion into the Upper Midwest, where freezing winter temperatures were previously believed to limit their spread. With impending climate change, our study provides evidence for the further expansion of Ae. albopictus into temperate regions of the United States resulting in increased risks for vector-borne disease transmission.
MeSH term(s)	Aedes/genetics ; Animals ; Cold Temperature ; Introduced Species ; Iowa ; Population Dynamics
Language	English
Publishing date	2022-02-08
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S. ; Research Support, U.S. Gov't, P.H.S.
ZDB-ID	2615211-3
ISSN	2045-2322 ; 2045-2322
ISSN (online)	2045-2322
ISSN	2045-2322
DOI	10.1038/s41598-022-06294-5
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

Article ; Online: Crossover Dynamics of Culex (Diptera: Culicidae) Vector Populations Determine WNV Transmission Intensity.

Tokarz, Ryan E / Smith, Ryan C

Journal of medical entomology

2019 Volume 57, Issue 1, Page(s) 289–296

Abstract: First introduced into the United States in 1999, West Nile virus (WNV) has become endemic and has established itself as the predominant mosquito-borne arbovirus in North America. Transmitted by mosquitoes of the genus Culex, regional landscapes influence ...

Abstract	First introduced into the United States in 1999, West Nile virus (WNV) has become endemic and has established itself as the predominant mosquito-borne arbovirus in North America. Transmitted by mosquitoes of the genus Culex, regional landscapes influence local vector species abundance, creating different mosquito ecologies that drive local transmission dynamics. In central Iowa, two mosquito species, Culex restuans Theobald and Culex pipiens Linnaeus, serve as the predominant mosquito vectors. Importantly, these mosquito populations are influenced by seasonal patterns in their abundance, with Cx. restuans preferring cool, early spring temperatures, while Cx. pipiens prefer the warmer, mid- to late-summer months. The point of the season at which Cx. pipiens becomes the dominant species is generally referred to as a 'crossover' period. To better understand the influence of crossover dynamics on WNV transmission, we examined environmental and mosquito abundance data, as well as mosquito infection rates and human disease cases from 2016 to 2018. We demonstrate that temperature influences the timing and duration of the crossover period, influencing mosquito abundance and human disease transmission. Together, these results suggest that Culex species crossover is an important variable of WNV transmission dynamics, which may provide an early warning indicators of increased WNV transmission.
MeSH term(s)	Animals ; Culex/physiology ; Culex/virology ; Humans ; Iowa ; Mosquito Vectors/physiology ; Mosquito Vectors/virology ; Population Dynamics ; Seasons ; Species Specificity ; Temperature ; West Nile Fever/transmission ; West Nile virus/physiology
Language	English
Publishing date	2019-07-26
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S. ; Research Support, U.S. Gov't, P.H.S.
ZDB-ID	410635-0
ISSN	1938-2928 ; 0022-2585
ISSN (online)	1938-2928
ISSN	0022-2585
DOI	10.1093/jme/tjz122
Database	MEDical Literature Analysis and Retrieval System OnLINE

In stock of ZB MED Cologne/Königswinter

Zs.A 303: Show issues

Location:
Je nach Verfügbarkeit (siehe Angabe bei Bestand)
bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
Jg. 1995 - 2021: Lesesall (1.OG)
ab Jg. 2022: Lesesaal (EG)

Order via subito

Details ▾
- See ZB MED holdings
- Order with fees

Article: Relative Influence of Land Use, Mosquito Abundance, and Bird Communities in Defining West Nile Virus Infection Rates in Culex Mosquito Populations

Adelman, James S. / Tokarz, Ryan E. / Euken, Alec E. / Field, Eleanor N. / Russell, Marie C. / Smith, Ryan C.

Insects. 2022 Aug. 23, v. 13, no. 9

2022

Abstract: Since its introduction to North America in 1999, the West Nile virus (WNV) has resulted in over 50,000 human cases and 2400 deaths. WNV transmission is maintained via mosquito vectors and avian reservoir hosts, yet mosquito and avian infections are not ... ...

Abstract	Since its introduction to North America in 1999, the West Nile virus (WNV) has resulted in over 50,000 human cases and 2400 deaths. WNV transmission is maintained via mosquito vectors and avian reservoir hosts, yet mosquito and avian infections are not uniform across ecological landscapes. As a result, it remains unclear whether the ecological communities of the vectors or reservoir hosts are more predictive of zoonotic risk at the microhabitat level. We examined this question in central Iowa, representative of the midwestern United States, across a land use gradient consisting of suburban interfaces with natural and agricultural habitats. At eight sites, we captured mosquito abundance data using New Jersey light traps and monitored bird communities using visual and auditory point count surveys. We found that the mosquito minimum infection rate (MIR) was better predicted by metrics of the mosquito community than metrics of the bird community, where sites with higher proportions of Culex pipiens group mosquitoes during late summer (after late July) showed higher MIRs. Bird community metrics did not significantly influence mosquito MIRs across sites. Together, these data suggest that the microhabitat suitability of Culex vector species is of greater importance than avian community composition in driving WNV infection dynamics at the urban and agricultural interface.
Keywords	Culex pipiens ; West Nile virus ; birds ; community structure ; humans ; land use ; microhabitats ; risk ; summer ; Iowa
Language	English
Dates of publication	2022-0823
Publishing place	Multidisciplinary Digital Publishing Institute
Document type	Article
ZDB-ID	2662247-6
ISSN	2075-4450
ISSN	2075-4450
DOI	10.3390/insects13090758
Database	NAL-Catalogue (AGRICOLA)

Order via subito

Article: Satellite Imaging and Long-Term Mosquito Surveillance Implicate the Influence of Rapid Urbanization on

Field, Eleanor N / Tokarz, Ryan E / Smith, Ryan C

Insects

2019 Volume 10, Issue 9

Abstract: The ecology and environmental conditions of a habitat have profound influences on mosquito population abundance. As a result, mosquito species vary in their associations with particular habitat types, yet long-term studies showing how mosquito ... ...

Abstract	The ecology and environmental conditions of a habitat have profound influences on mosquito population abundance. As a result, mosquito species vary in their associations with particular habitat types, yet long-term studies showing how mosquito populations shift in a changing ecological landscape are lacking. To better understand how land use changes influence mosquito populations, we examined mosquito surveillance data over a thirty-four-year period for two contrasting sites in central Iowa. One site displayed increasing levels of urbanization over time and a dramatic decline in
Language	English
Publishing date	2019-08-24
Publishing country	Switzerland
Document type	Journal Article
ISSN	2075-4450
ISSN	2075-4450
DOI	10.3390/insects10090269
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article: Relative Influence of Land Use, Mosquito Abundance, and Bird Communities in Defining West Nile Virus Infection Rates in

Adelman, James S / Tokarz, Ryan E / Euken, Alec E / Field, Eleanor N / Russell, Marie C / Smith, Ryan C

Insects

2022 Volume 13, Issue 9

Abstract	Since its introduction to North America in 1999, the West Nile virus (WNV) has resulted in over 50,000 human cases and 2400 deaths. WNV transmission is maintained via mosquito vectors and avian reservoir hosts, yet mosquito and avian infections are not uniform across ecological landscapes. As a result, it remains unclear whether the ecological communities of the vectors or reservoir hosts are more predictive of zoonotic risk at the microhabitat level. We examined this question in central Iowa, representative of the midwestern United States, across a land use gradient consisting of suburban interfaces with natural and agricultural habitats. At eight sites, we captured mosquito abundance data using New Jersey light traps and monitored bird communities using visual and auditory point count surveys. We found that the mosquito minimum infection rate (MIR) was better predicted by metrics of the mosquito community than metrics of the bird community, where sites with higher proportions of
Language	English
Publishing date	2022-08-23
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2662247-6
ISSN	2075-4450
ISSN	2075-4450
DOI	10.3390/insects13090758
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article: Satellite Imaging and Long-Term Mosquito Surveillance Implicate the Influence of Rapid Urbanization on <i>Culex</i> Vector Populations

Field, Eleanor N / Tokarz, Ryan E / Smith, Ryan C

Insects. 2019 Aug. 24, v. 10, no. 9

2019

Abstract	The ecology and environmental conditions of a habitat have profound influences on mosquito population abundance. As a result, mosquito species vary in their associations with particular habitat types, yet long-term studies showing how mosquito populations shift in a changing ecological landscape are lacking. To better understand how land use changes influence mosquito populations, we examined mosquito surveillance data over a thirty-four-year period for two contrasting sites in central Iowa. One site displayed increasing levels of urbanization over time and a dramatic decline in Culex pipiens group (an informal grouping of Culex restuans, Culex pipiens, and Culex salinarius, referred to as CPG), the primary vectors of West Nile virus in central Iowa. Similar effects were also shown for other mosquito vector populations, yet the abundance of Aedes vexans remained constant during the study period. This is in contrast to a second site, which reflected an established urban landscape. At this location, there were no significant changes in land use and CPG populations remained constant. Climate data (temperature, total precipitation) were compiled for each location to see if these changes could account for altered population dynamics, but neither significantly influence CPG abundance at the respective site locations. Taken together, our data suggest that increased landscape development can have negative impacts on Culex vector populations, and we argue that long-term surveillance paired with satellite imagery analysis are useful methods for measuring the impacts of rapid human development on mosquito vector communities. As a result, we believe that land use changes can have important implications for mosquito management practices, population modeling, and disease transmission dynamics.
Keywords	Aedes vexans ; Culex pipiens ; Culex restuans ; Culex salinarius ; West Nile virus ; disease transmission ; environmental factors ; habitats ; image analysis ; insect vectors ; land use change ; landscapes ; meteorological data ; models ; monitoring ; population dynamics ; rain ; remote sensing ; species abundance ; temperature ; urban areas ; urbanization ; Iowa
Language	English
Dates of publication	2019-0824
Publishing place	Multidisciplinary Digital Publishing Institute
Document type	Article
ISSN	2075-4450
DOI	10.3390/insects10090269
Database	NAL-Catalogue (AGRICOLA)

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: Another dengue fever outbreak in Eastern Ethiopia-An emerging public health threat.

Gutu, Mulugeta Asefa / Bekele, Alemayehu / Seid, Yimer / Mohammed, Yusuf / Gemechu, Fekadu / Woyessa, Abyot Bekele / Tayachew, Adamu / Dugasa, Yohanis / Gizachew, Lehageru / Idosa, Moti / Tokarz, Ryan E / Sugerman, David

PLoS neglected tropical diseases

2021 Volume 15, Issue 1, Page(s) e0008992

Abstract: Background: Dengue Fever (DF) is a viral disease primarily transmitted by Aedes (Ae.) aegypti mosquitoes. Outbreaks in Eastern Ethiopia were reported during 2014-2016. In May 2017, we investigated the first suspected DF outbreak from Kabridahar Town, ... ...

Abstract	Background: Dengue Fever (DF) is a viral disease primarily transmitted by Aedes (Ae.) aegypti mosquitoes. Outbreaks in Eastern Ethiopia were reported during 2014-2016. In May 2017, we investigated the first suspected DF outbreak from Kabridahar Town, Somali region (Eastern Ethiopia) to describe its magnitude, assess risk factors, and implement control measures. Methods: Suspected DF cases were defined as acute febrile illness plus ≥2 symptoms (headache, fever, retro-orbital pain, myalgia, arthralgia, rash, or hemorrhage) in Kabridahar District residents. All reported cases were identified through medical record review and active searches. Severe dengue was defined as DF with severe organ impairment, severe hemorrhage, or severe plasma leakage. We conducted a neighborhood-matched case-control study using a subset of suspected cases and conveniently-selected asymptomatic community controls and interviewed participants to collect demographic and risk factor data. We tested sera by RT-PCR to detect dengue virus (DENV) and identify serotypes. Entomologists conducted mosquito surveys at community households to identify species and estimate larval density using the house index (HI), container index (CI) and Breteau index (BI), with BI≥20 indicating high density. Results: We identified 101 total cases from May 12-31, 2017, including five with severe dengue (one death). The attack rate (AR) was 17/10,000. Of 21 tested samples, 15 (72%) were DENV serotype 2 (DENV 2). In the case-control study with 50 cases and 100 controls, a lack of formal education (AOR [Adjusted Odds Ratio] = 4.2, 95% CI [Confidence Interval] 1.6-11.2) and open water containers near the home (AOR = 3.0, 95% CI 1.2-7.5) were risk factors, while long-lasting insecticide treated-net (LLITN) usage (AOR = 0.21, 95% CI 0.05-0.79) was protective. HI and BI were 66/136 (49%) and 147 per 100 homes (147%) respectively, with 151/167 (90%) adult mosquitoes identified as Ae. aegypti. Conclusion: The epidemiologic, entomologic, and laboratory investigation confirmed a DF outbreak. Mosquito indices were far above safe thresholds, indicating inadequate vector control. We recommended improved vector surveillance and control programs, including best practices in preserving water and disposal of open containers to reduce Aedes mosquito density.
MeSH term(s)	Adolescent ; Adult ; Aedes/classification ; Aedes/growth & development ; Animals ; Case-Control Studies ; Child ; Child, Preschool ; Dengue/epidemiology ; Dengue Virus/isolation & purification ; Disease Outbreaks ; Ethiopia/epidemiology ; Female ; Humans ; Male ; Middle Aged ; Mosquito Vectors ; Prevalence ; Risk Factors ; Serogroup
Language	English
Publishing date	2021-01-19
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2429704-5
ISSN	1935-2735 ; 1935-2727
ISSN (online)	1935-2735
ISSN	1935-2727
DOI	10.1371/journal.pntd.0008992
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article ; Online: Twenty years of West Nile virus spread and evolution in the Americas visualized by Nextstrain.

Hadfield, James / Brito, Anderson F / Swetnam, Daniele M / Vogels, Chantal B F / Tokarz, Ryan E / Andersen, Kristian G / Smith, Ryan C / Bedford, Trevor / Grubaugh, Nathan D

PLoS pathogens

2019 Volume 15, Issue 10, Page(s) e1008042

Abstract: It has been 20 years since West Nile virus first emerged in the Americas, and since then, little progress has been made to control outbreaks caused by this virus. After its first detection in New York in 1999, West Nile virus quickly spread across the ... ...

Abstract	It has been 20 years since West Nile virus first emerged in the Americas, and since then, little progress has been made to control outbreaks caused by this virus. After its first detection in New York in 1999, West Nile virus quickly spread across the continent, causing an epidemic of human disease and massive bird die-offs. Now the virus has become endemic to the United States, where an estimated 7 million human infections have occurred, making it the leading mosquito-borne virus infection and the most common cause of viral encephalitis in the country. To bring new attention to one of the most important mosquito-borne viruses in the Americas, we provide an interactive review using Nextstrain: a visualization tool for real-time tracking of pathogen evolution (nextstrain.org/WNV/NA). Nextstrain utilizes a growing database of more than 2,000 West Nile virus genomes and harnesses the power of phylogenetics for students, educators, public health workers, and researchers to visualize key aspects of virus spread and evolution. Using Nextstrain, we use virus genomics to investigate the emergence of West Nile virus in the U S, followed by its rapid spread, evolution in a new environment, establishment of endemic transmission, and subsequent international spread. For each figure, we include a link to Nextstrain to allow the readers to directly interact with and explore the underlying data in new ways. We also provide a brief online narrative that parallels this review to further explain the data and highlight key epidemiological and evolutionary features (nextstrain.org/narratives/twenty-years-of-WNV). Mirroring the dynamic nature of outbreaks, the Nextstrain links provided within this paper are constantly updated as new West Nile virus genomes are shared publicly, helping to stay current with the research. Overall, our review showcases how genomics can track West Nile virus spread and evolution, as well as potentially uncover novel targeted control measures to help alleviate its public health burden.
MeSH term(s)	Computational Biology/methods ; Databases, Genetic ; Disease Transmission, Infectious ; Evolution, Molecular ; Genome, Viral ; Humans ; United States/epidemiology ; West Nile Fever/epidemiology ; West Nile Fever/transmission ; West Nile Fever/virology ; West Nile virus/classification ; West Nile virus/genetics ; West Nile virus/pathogenicity
Language	English
Publishing date	2019-10-31
Publishing country	United States
Document type	Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, P.H.S. ; Review
ZDB-ID	2205412-1
ISSN	1553-7374 ; 1553-7374
ISSN (online)	1553-7374
ISSN	1553-7374
DOI	10.1371/journal.ppat.1008042
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

To top

Your last searches

Search results

Search options

Article ; Online: Surveillance and genetic data support the introduction and establishment of Aedes albopictus in Iowa, USA.

More links

Kategorien

Order via subito

Article ; Online: Crossover Dynamics of Culex (Diptera: Culicidae) Vector Populations Determine WNV Transmission Intensity.

More links

Kategorien

In stock of ZB MED Cologne/Königswinter

Order via subito

Article: Relative Influence of Land Use, Mosquito Abundance, and Bird Communities in Defining West Nile Virus Infection Rates in Culex Mosquito Populations

More links

Kategorien

Order via subito

Article: Satellite Imaging and Long-Term Mosquito Surveillance Implicate the Influence of Rapid Urbanization on

More links

Kategorien

Order via subito

Inter-library loan at ZB MED

Article: Relative Influence of Land Use, Mosquito Abundance, and Bird Communities in Defining West Nile Virus Infection Rates in

More links

Kategorien

Order via subito

Article: Satellite Imaging and Long-Term Mosquito Surveillance Implicate the Influence of Rapid Urbanization on <i>Culex</i> Vector Populations

More links

Kategorien

Order via subito

Inter-library loan at ZB MED

Article ; Online: Another dengue fever outbreak in Eastern Ethiopia-An emerging public health threat.

More links

Kategorien

Order via subito

Article ; Online: Twenty years of West Nile virus spread and evolution in the Americas visualized by Nextstrain.

More links

Kategorien

Order via subito