Journal of medical entomology最新文献_第10页

Diversity and distribution of sodium channel mutations in Aedes albopictus (Diptera: Culicidae). 白纹伊蚊（Diptera: Culicidae）钠通道突变的多样性和分布。

Journal of medical entomology Pub Date : 2024-05-13 DOI: 10.1093/jme/tjae005

Nancy M Endersby-Harshman, Thomas L Schmidt, Ary A Hoffmann

{"title":"Diversity and distribution of sodium channel mutations in Aedes albopictus (Diptera: Culicidae).","authors":"Nancy M Endersby-Harshman, Thomas L Schmidt, Ary A Hoffmann","doi":"10.1093/jme/tjae005","DOIUrl":"10.1093/jme/tjae005","url":null,"abstract":"There is growing interest in insecticide resistance in the mosquito, Aedes albopictus (Skuse), as its potential for spreading diseases is increasing as urbanization and control efforts intensify. Here we review the presence and diversity of mutations in the voltage-sensitive sodium channel (Vssc) gene associated with pyrethroid resistance and report on additional surveys of these mutations in new populations with an analysis of their spread. The known diversity of these mutations has increased in recent years including the identification of 26 non-synonymous mutations, although phenotypic data associating mutations with resistance remain limited. We provide data on mutations in several new locations including those in Timor Leste, Indonesia, and Vanuatu. We use population genomic data from ddRAD analyses of target populations with the 1534C mutation to identify single nucleotide polymorphisms (SNPs) associated with the mutant to test for clustering of SNPs based on the presence of the 1534C mutation rather than population origin. Our findings suggest spread of resistance alleles via genetic invasion, which is further supported by patterns from a genome-wide principal components analysis. These data point to movement of resistance alleles across wide areas with likely impacts on local control options.","PeriodicalId":94091,"journal":{"name":"Journal of medical entomology","volume":" ","pages":"630-643"},"PeriodicalIF":0.0,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11078580/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139747895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Highlights of Veterinary Entomology, 2022. 2022 年兽医昆虫学要点》。

Journal of medical entomology Pub Date : 2024-05-13 DOI: 10.1093/jme/tjad172

Caleb B Hubbard

引用次数: 0

Methods of sampling malaria vectors and their reliability in estimating entomological indices in Africa. 非洲疟疾病媒采样方法及其在估算昆虫学指数方面的可靠性。

Journal of medical entomology Pub Date : 2024-05-13 DOI: 10.1093/jme/tjae015

Teshome Degefa, Delenasaw Yewhalaw, Guiyun Yan

{"title":"Methods of sampling malaria vectors and their reliability in estimating entomological indices in Africa.","authors":"Teshome Degefa, Delenasaw Yewhalaw, Guiyun Yan","doi":"10.1093/jme/tjae015","DOIUrl":"10.1093/jme/tjae015","url":null,"abstract":"In efforts to intensify malaria control through vector control and hasten the progress towards elimination, the impact of control interventions needs to be evaluated. This requires sampling vector population using appropriate trapping methods. The aim of this article is to critically review methods of sampling malaria vectors and their reliability in estimating entomological indicators of malaria transmission in Africa. The standard methods are human landing catch (HLC), pyrethrum spray catch, and pit shelter for sampling host-seeking, indoor resting, and outdoor resting malaria vectors, respectively. However, these methods also have drawbacks such as exposure of collectors to infective mosquito bites, sampling bias, and feasibility issue. Centers for Disease Control and Prevention (CDC) light traps placed beside human-occupied bed nets have been used as an alternative to the HLC for sampling host-seeking malaria vectors. Efforts have been made to evaluate the CDC light traps against HLC to generate a conversion factor in order to use them as a proxy estimator of human biting rate and entomological inoculation rates in Africa. However, a reproducible conversion factor was not found, indicating that the trapping efficiency of the CDC light traps varies between different geographical locations. Several other alternative traps have also been developed and evaluated in different settings but most of them require further standardization. Among these, human-baited double net trap/CDC light trap combination and mosquito electrocuting trap have the potential to replace the HLC for routine malaria vector surveillance. Further research is needed to optimize the alternative sampling methods and/or develop new surveillance tools based on vector behavior.","PeriodicalId":94091,"journal":{"name":"Journal of medical entomology","volume":" ","pages":"573-583"},"PeriodicalIF":0.0,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11078579/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139941438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Species composition of Culicoides (Diptera: Ceratopogonidae) in the Ridge and Valley region of Tennessee, USA. 美国田纳西州山脊和山谷地区的 Culicoides（双翅目：Ceratopogonidae）物种组成。

Journal of medical entomology Pub Date : 2024-05-13 DOI: 10.1093/jme/tjae028

Emily E Doub, Stacey L Vigil, Alec T Thompson, Avery L Korns, Michael J Yabsley, Mark G Ruder, Christopher A Cleveland

{"title":"Species composition of Culicoides (Diptera: Ceratopogonidae) in the Ridge and Valley region of Tennessee, USA.","authors":"Emily E Doub, Stacey L Vigil, Alec T Thompson, Avery L Korns, Michael J Yabsley, Mark G Ruder, Christopher A Cleveland","doi":"10.1093/jme/tjae028","DOIUrl":"10.1093/jme/tjae028","url":null,"abstract":"Biting midges in the genus Culicoides Latreille (Diptera: Ceratopogonidae) are known to transmit many pathogens of veterinary and medical concern. Although much work has been done globally and in certain regions of North America, Culicoides spp. research in rural Appalachia is limited. To begin characterizing the distribution and community structure of Culicoides spp. in Appalachia, we surveyed 2 distinct sites in the Ridge and Valley ecoregion of northeastern Tennessee, USA, from April 2021-September 2021. Culicoides spp. were sampled using 2 methods: Centers for Disease Control ultraviolet LED light traps and potential larval habitat substrate collection (coupled with water chemistry values). Site 1 was dominated by natural features, and Site 2 was a beef cattle operation. During 96 trap nights, a total of 1,568 Culicoides were collected, representing 24 species. Site 1 yielded the highest diversity, with 24 species, while Site 2 yielded 12 species. Overall, the most abundant species in light traps were C. stellifer Coquillett (44%), C. bergi Cochrane (18%), C. haematopotus Malloch (12%), and C. debilipalpis Lutz (11%). From substrate sampling, 8 species were identified. Culicoides haematopotus was the most abundant and was collected during each sampling period. Water chemistry values taken at the time of substrate collection were not significantly related to which Culicoides spp. emerged from a given substrate. Our results indicate a diverse community of Culicoides spp. in our study area, however, further work is needed to identify Culicoides species composition across a variety of landscapes in Appalachia and inform research on vector presence and associated vector disease dynamics.","PeriodicalId":94091,"journal":{"name":"Journal of medical entomology","volume":" ","pages":"756-763"},"PeriodicalIF":0.0,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140103082","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluating the carnivorous efficacy of Utricularia aurea (Lamiales: Lentibulariaceae) on the larval stages of Anopheles stephensi, Culex quinquefasciatus, and Aedes aegypti (Diptera: Culicidae). 评估 Utricularia aurea（灯心草科：Lentibulariaceae）对按蚊、库蚊和埃及伊蚊（双翅目：Culicidae）幼虫阶段的食肉功效。

Journal of medical entomology Pub Date : 2024-05-13 DOI: 10.1093/jme/tjae038

Ajeet Kumar Mohanty, Abhishek Govekar, Charles de Souza, Abhipsa Mohapatra, Malapati Kuppuswamy Janarthanam, Raja Vukanti, Justin J Montemarano, Praveen Balabaskaran Nina

{"title":"Evaluating the carnivorous efficacy of Utricularia aurea (Lamiales: Lentibulariaceae) on the larval stages of Anopheles stephensi, Culex quinquefasciatus, and Aedes aegypti (Diptera: Culicidae).","authors":"Ajeet Kumar Mohanty, Abhishek Govekar, Charles de Souza, Abhipsa Mohapatra, Malapati Kuppuswamy Janarthanam, Raja Vukanti, Justin J Montemarano, Praveen Balabaskaran Nina","doi":"10.1093/jme/tjae038","DOIUrl":"10.1093/jme/tjae038","url":null,"abstract":"The emergence of insecticide resistance in mosquitoes necessitates the exploration and validation of sustainable biological strategies for controlling mosquitoes in their natural habitats. We assessed the predatory effect of Utricularia aurea Lour (Lamiales: Lentibulariaceae), an aquatic carnivorous plant found in the Indian subcontinent, Japan, and Australia, on 4 instars of Anopheles stephensi Liston, Culex quinquefasciatus Say, and Aedes aegypti Linn (Diptera: Culicidae), in the laboratory and field settings. In the laboratory setting, predation of larvae by U. aurea was highest during the first hour when it predated 45%, 61%, and 58% of first instars of An. stephensi, Cx. quinquefasciatus, and, Ae. aegypti, respectively, and, within 12 h, U. aurea preyed upon ~95% of the first, second, and third instars of the 3 mosquito species, ~80% of the fourth instars of An. stephensi and Ae. aegypti, and ~60% of fourth instars of Cx. quinquefasciatus. The predatory effect of U. aurea varied with mosquito species and instar. Broadly, predation risk declined with the increase of the instar size. In the field setting, at the end of 16 days, U. aurea predated 76% and 71% of the immature An. stephensi and Ae. aegypti, respectively. Our findings suggest U. aurea can be utilized as a potential biocontrol agent for controlling mosquito larvae in natural habitats; however, the current claim warrants additional investigations in a variety of natural habitats.","PeriodicalId":94091,"journal":{"name":"Journal of medical entomology","volume":" ","pages":"719-725"},"PeriodicalIF":0.0,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140195377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Using artificial odors to optimize attractiveness of host decoy traps to malaria vectors. 利用人工气味优化宿主诱饵诱捕器对疟疾病媒的吸引力。

Journal of medical entomology Pub Date : 2024-05-13 DOI: 10.1093/jme/tjae010

Romaric Akoton, Simon P Sawadogo, Eric Tossou, Achille S Nikiema, Genevieve Tchigossou, Pierre M Sovegnon, Luc Djogbenou, Francis Zeukeng, Frances M Hawkes, Rock K Dabire, Rousseau Djouaka, Gabriella Gibson

{"title":"Using artificial odors to optimize attractiveness of host decoy traps to malaria vectors.","authors":"Romaric Akoton, Simon P Sawadogo, Eric Tossou, Achille S Nikiema, Genevieve Tchigossou, Pierre M Sovegnon, Luc Djogbenou, Francis Zeukeng, Frances M Hawkes, Rock K Dabire, Rousseau Djouaka, Gabriella Gibson","doi":"10.1093/jme/tjae010","DOIUrl":"10.1093/jme/tjae010","url":null,"abstract":"Malaria vector surveillance tools often incorporate features of hosts that are attractive to blood-seeking females. The recently developed host decoy trap (HDT) combines visual, thermal, and olfactory stimuli associated with human hosts and has shown great efficacy in terms of collecting malaria vectors. Synthetic odors and yeast-produced carbon dioxide (CO2) could prove useful by mimicking the human odors currently used in HDTs and provide standardized and easy-to-use olfactory attractants. The objective of this study was to test the attractiveness of various olfactory attractant cues in HDTs to capture malaria vectors. We compared 4 different odor treatments in outdoor field settings in southern Benin and western Burkina Faso: the standard HDT using a human, HDT with yeast-produced CO2, HDT with an artificial odor blend, and HDT with yeast-produced CO2 plus artificial odor blend. In both experimental sites, the standard HDT that incorporated a real human produced the greatest catch of Anopheles gambiae s.l (Diptera: Culicidae). The alternatives tested were still effective at collecting target vector species, although the most effective included CO2, either alone (Benin) or in combination with synthetic odor (Burkina Faso). The trap using synthetic human odor alone caught the fewest An. gambiae s.l. compared to the other baited traps. Both Anopheles coluzzii and Anopheles gambiae were caught by each trap, with a predominance of An. coluzzii. Synthetic baits could, therefore, represent a more standardized and easier-to-deploy approach than using real human odor baits for a robust vector monitoring strategy.","PeriodicalId":94091,"journal":{"name":"Journal of medical entomology","volume":" ","pages":"808-814"},"PeriodicalIF":0.0,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139934907","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Finding unveiled: Culex thalassius (Diptera: Culicidae), a new mosquito species emerges in the Cabo Verde archipelago. 发现揭晓：佛得角群岛出现的新蚊种 Culex thalassius（双翅目：库蚊）。

Journal of medical entomology Pub Date : 2024-05-13 DOI: 10.1093/jme/tjae027

Adéritow Augusto Lopes Macedo Gonçalves, Luís Filipe Vieira da Silva Lopes, Davidson Daniel Sousa Monteiro, Aires Januário Fernandes da Moura, Carla Alexandra Gama Carrilho da Costa Sousa, Silvânia da Veiga Leal

{"title":"Finding unveiled: Culex thalassius (Diptera: Culicidae), a new mosquito species emerges in the Cabo Verde archipelago.","authors":"Adéritow Augusto Lopes Macedo Gonçalves, Luís Filipe Vieira da Silva Lopes, Davidson Daniel Sousa Monteiro, Aires Januário Fernandes da Moura, Carla Alexandra Gama Carrilho da Costa Sousa, Silvânia da Veiga Leal","doi":"10.1093/jme/tjae027","DOIUrl":"10.1093/jme/tjae027","url":null,"abstract":"Mosquito-borne diseases can pose significant burdens. In many countries, they pose a risk to national economies and the well-being of humans and animals. To mitigate this, mosquito surveillance is crucial to assess the real and potential transmission of mosquito-borne diseases. Between 2020 and 2023, mosquito larvae were collected from both indoor and outdoor breeding sites in urban and rural areas of 4 municipalities of Santiago and Boavista Islands in Cabo Verde. Mosquitoes were identified morphologically and by polymerase chain reaction-based techniques that targeted the mitochondrial cytochrome C oxidase subunit I sequence. During this period, 6,825 breeding sites were assessed, and of 8,094 mosquito specimens screened, 194 specimens of Culex thalassius were identified for the first time in the country in 4 municipalities of Santiago and Boavista Islands. This new finding highlights the importance of including entomological surveillance in health systems. Although this species has only been detected on a few islands, it is important to continuously monitor it to determine its distribution, spread/dispersal, density, and potential involvement in pathogen transmission.","PeriodicalId":94091,"journal":{"name":"Journal of medical entomology","volume":" ","pages":"791-797"},"PeriodicalIF":0.0,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139944825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rickettsia species identified in adult, host-seeking Dermacentor occidentalis (Acari: Ixodidae) from Baja California, Mexico, and Oregon and Washington, United States. 在墨西哥下加利福尼亚州、美国俄勒冈州和华盛顿州寻找宿主的成虫 Dermacentor occidentalis（Acari: Ixodidae）体内发现的立克次体种类。

Journal of medical entomology Pub Date : 2024-05-13 DOI: 10.1093/jme/tjae023

Christopher D Paddock, Maria L Zambrano, James R Clover, Stephen Ladd-Wilson, Elizabeth A Dykstra, Amy Salamone, David Kangiser, Bryan N Ayres, Savannah L Shooter, Sandor E Karpathy, Anne M Kjemtrup, Lorenza Beati, Michael L Levin, Robert S Lane, Oscar E Zazueta

{"title":"Rickettsia species identified in adult, host-seeking Dermacentor occidentalis (Acari: Ixodidae) from Baja California, Mexico, and Oregon and Washington, United States.","authors":"Christopher D Paddock, Maria L Zambrano, James R Clover, Stephen Ladd-Wilson, Elizabeth A Dykstra, Amy Salamone, David Kangiser, Bryan N Ayres, Savannah L Shooter, Sandor E Karpathy, Anne M Kjemtrup, Lorenza Beati, Michael L Levin, Robert S Lane, Oscar E Zazueta","doi":"10.1093/jme/tjae023","DOIUrl":"10.1093/jme/tjae023","url":null,"abstract":"The Pacific Coast tick (Dermacentor occidentalis Marx, 1892) is a frequently encountered and commonly reported human-biting tick species that has been recorded from most of California and parts of southwestern Oregon, southcentral Washington, and northwestern Mexico. Although previous investigators have surveyed populations of D. occidentalis for the presence of Rickettsia species across several regions of California, populations of this tick have not been surveyed heretofore for rickettsiae from Baja California, Oregon, or Washington. We evaluated 1,367 host-seeking, D. occidentalis adults collected from 2015 to 2022 by flagging vegetation at multiple sites in Baja California, Mexico, and Oregon and Washington, United States, using genus- and species-specific assays for spotted fever group rickettsiae. DNA of Rickettsia 364D, R. bellii, and R. tillamookensis was not detected in specimens from these regions. DNA of R. rhipicephali was detected in D. occidentalis specimens obtained from Ensenada Municipality in Baja California and southwestern Oregon, but not from Washington. All ompA sequences of R. rhipichephali that were amplified from individual ticks in southwestern Oregon were represented by a single genotype. DNA of the Ixodes pacificus rickettsial endosymbiont was amplified from specimens collected in southwestern Oregon and Klickitat County, Washington; to the best of our knowledge, this Rickettsia species has never been identified in D. occidentalis. Collectively, these data are consistent with a relatively recent introduction of Pacific Coast ticks in the northernmost extension of its recognized range.","PeriodicalId":94091,"journal":{"name":"Journal of medical entomology","volume":" ","pages":"781-790"},"PeriodicalIF":0.0,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139975169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Earliest records of the Asian longhorned tick (Acari: Ixodidae) in Staten Island, New York, and subsequent population establishment, with a review of its potential medical and veterinary importance in the United States. 亚洲长角蜱（Acari: Ixodidae）在纽约史坦顿岛的最早记录及随后的种群建立，并回顾其在美国潜在的医疗和兽医重要性。

Journal of medical entomology Pub Date : 2024-05-13 DOI: 10.1093/jme/tjae019

Waheed Bajwa, Ashley Kennedy, Zachary Vincent, Garrett Heck, Shamim Riaj, Zahir Shah, Leonid Tsynman, Cory Casal, Scott Haynes, Hannah Cornman, Andrea Egizi, Ellen Stromdahl, Robyn Nadolny

{"title":"Earliest records of the Asian longhorned tick (Acari: Ixodidae) in Staten Island, New York, and subsequent population establishment, with a review of its potential medical and veterinary importance in the United States.","authors":"Waheed Bajwa, Ashley Kennedy, Zachary Vincent, Garrett Heck, Shamim Riaj, Zahir Shah, Leonid Tsynman, Cory Casal, Scott Haynes, Hannah Cornman, Andrea Egizi, Ellen Stromdahl, Robyn Nadolny","doi":"10.1093/jme/tjae019","DOIUrl":"10.1093/jme/tjae019","url":null,"abstract":"Three Asian longhorned ticks (Haemaphysalis longicornis) were collected on Staten Island, Richmond County, New York, in 2014-2015 as part of a tick-borne disease surveillance program conducted by the New York City Department of Health and Mental Hygiene and the Defense Centers of Public Health - Aberdeen Tick-Borne Disease Laboratory. These records mark the earliest known occurrence of H. longicornis in New York State outside of quarantine areas, predating previously reported detections by several years. Robust populations of H. longicornis were collected in subsequent years at the Staten Island site where these few ticks were found, demonstrating that small infestations have the potential to proliferate quickly. Haemaphysalis longicornis is a 3-host ixodid tick native to eastern Asia but now established in the United States, as well as Australasia and several Pacific islands. Although H. longicornis has not yet been associated with human disease transmission in the United States, it warrants attention as a potential vector, as it is demonstrated to harbor various pathogens of medical and veterinary interest across its native and introduced range.","PeriodicalId":94091,"journal":{"name":"Journal of medical entomology","volume":" ","pages":"764-771"},"PeriodicalIF":0.0,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139984877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cascading impacts of overstory structure in managed forests on understory structure, microclimate conditions, and Ixodes scapularis (Acari: Ixodidae) densities. 人工林上层结构对下层结构、小气候条件和 Ixodes scapularis（Acari: Ixodidae）密度的连带影响。

Journal of medical entomology Pub Date : 2024-05-13 DOI: 10.1093/jme/tjae030

Stephanie N Hurd, Laura S Kenefic, Jessica E Leahy, Carly C Sponarski, Allison M Gardner

{"title":"Cascading impacts of overstory structure in managed forests on understory structure, microclimate conditions, and Ixodes scapularis (Acari: Ixodidae) densities.","authors":"Stephanie N Hurd, Laura S Kenefic, Jessica E Leahy, Carly C Sponarski, Allison M Gardner","doi":"10.1093/jme/tjae030","DOIUrl":"10.1093/jme/tjae030","url":null,"abstract":"Forest management practices designed to meet varied landowner objectives affect wildlife habitat and may interrupt the life-cycle stages of disease vectors, including the black-legged tick, Ixodes scapularis Say (Acari: Ixodidae). Ixodes scapularis transmits multiple pathogens including Borrelia burgdorferi, the causative agent of Lyme disease, which is the most common tick-borne disease in the United States. There is evidence that a range of active forest management practices (e.g., invasive plant removal, prescribed burning) can alter tick densities and pathogen transmission. However, few studies have investigated relationships between forest stand structural variables commonly manipulated by timber harvesting and tick ecology. Foresters may harvest timber to create certain forest structural conditions like the mean number of trees, or basal area, per hectare. This study used a spatially replicated experiment in a blocked design to compare forest stands with a range of overstory structures and document variations in the midstory, understory, and forest floor, as well as microclimate conditions within tick off-host habitat. Greater numbers of trees or basal area per hectare correlated with greater canopy closure but less understory cover, stabilized microclimate temperature, higher microclimate humidity, and greater I. scapularis nymph densities. A random forest model identified understory forest structure as the strongest predictor of nymph densities. There was no relationship between the number of trees or basal area per hectare and daily deer (Odocoileus virginianus Zimmermann) activity or nymphal infection prevalence. These findings provide a deeper understanding of tick-habitat associations within a forest stand and have the potential to inform forest management decisions.","PeriodicalId":94091,"journal":{"name":"Journal of medical entomology","volume":" ","pages":"686-700"},"PeriodicalIF":0.0,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140141283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0