Nicholas Benton, Larissa Krokovsky, Alessio Gasparotto, Fiona F Hunter
{"title":"New record of Psorophora howardii (Diptera: Culicidae) in Southern Ontario, Canada.","authors":"Nicholas Benton, Larissa Krokovsky, Alessio Gasparotto, Fiona F Hunter","doi":"10.1093/jme/tjaf096","DOIUrl":"10.1093/jme/tjaf096","url":null,"abstract":"<p><p>Psorophora howardii Coquillett is a large floodwater mosquito native to much of the tropical and subtropical regions of the Americas, including the southern United States, several Caribbean Islands, and portions of Central and South America. Although it is recognized as a nuisance species, substantial gaps exist in the known range of Ps. howardii. In September 2024, multiple adults (2 males and 4 females) of Ps. howardii were collected at 2 different locations in Windsor-Essex County, Ontario, Canada. Specimens were collected during routine West Nile virus mosquito surveillance using CDC miniature light traps, using UV light and CO2, and a BG-Sentinel trap. Morphological identifications were confirmed using DNA barcoding (cytochrome oxidase I gene). This constitutes the first official record of Ps. howardii in Canada and is the northernmost record for the species (~42°N latitude). The detection of Ps. howardii at 2 locations, separated by 26 km, suggests established populations are present in southern Ontario, Canada. This discovery highlights the need for continued mosquito surveillance to monitor the northward expansion of mosquito species.</p>","PeriodicalId":94091,"journal":{"name":"Journal of medical entomology","volume":" ","pages":"1349-1352"},"PeriodicalIF":2.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12507427/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144628356","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}
Eduarda Saldanha Rieffel, Thais Fernanda de Jesus, Fabiane de Holleben Camozzato Fadrique, Amanda Andersson Pereira Stark, Camila Belmonte Oliveira, Yan Wahast Islabão, Alexia Brauner de Mello, Mauro Pereira Soares, Raqueli Teresinha França
{"title":"First case report of mange in the bat Tadarida brasiliensis (Chiroptera: Molossidae) caused by Notoedres sp. (Sarcoptiformes: Sarcoptidae).","authors":"Eduarda Saldanha Rieffel, Thais Fernanda de Jesus, Fabiane de Holleben Camozzato Fadrique, Amanda Andersson Pereira Stark, Camila Belmonte Oliveira, Yan Wahast Islabão, Alexia Brauner de Mello, Mauro Pereira Soares, Raqueli Teresinha França","doi":"10.1093/jme/tjaf023","DOIUrl":"10.1093/jme/tjaf023","url":null,"abstract":"<p><p>Tadarida brasiliensis is an insectivorous bat of the family Molossidae, occurring in Brazil, primarily in the southern and southeastern regions, forming colonies in rural and urban environments. In this study, we report for the first time the parasitism of the mite Notoedres sp. in T. brasiliensis in the country. Clinical examination revealed disseminated crusty papular lesions, concentrated on the face, forelimbs, hindlimbs, perianal region, and uropatagium. Histological examination showed hyperplasia of the stratum corneum with parasitic structures compatible with mites. This study highlights the importance of ectoparasite infestations in bats for the health and conservation of this species in the Pampa biome.</p>","PeriodicalId":94091,"journal":{"name":"Journal of medical entomology","volume":" ","pages":"1021-1025"},"PeriodicalIF":0.0,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144287672","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}
Julia Desiato, Grace Chan, Marco Palmeri, Jamie L Cantoni, Duncan W Cozens, Megan A Linske, Doug E Brackney, Kirby C Stafford, David B Banach
{"title":"Using geospatial analysis to describe the association between active tick surveillance data and clinical cases of anaplasmosis in Connecticut.","authors":"Julia Desiato, Grace Chan, Marco Palmeri, Jamie L Cantoni, Duncan W Cozens, Megan A Linske, Doug E Brackney, Kirby C Stafford, David B Banach","doi":"10.1093/jme/tjaf055","DOIUrl":"10.1093/jme/tjaf055","url":null,"abstract":"<p><p>Anaplasmosis is a vector-borne disease caused by the bacterium Anaplasma phagocytophilum and is vectored by Ixodes scapularis ticks primarily in the northeastern United States. The Connecticut Department of Public Health designated anaplasmosis a state-wide reportable disease in 2008 and a large increase in cases was witnessed in Connecticut between 2014 and 2019. This study used clinical cases of anaplasmosis reported to the Connecticut Department of Public Health and A. phagocytophilum prevalence data in questing I. scapularis to understand emerging geographic disease hotspots and evaluate potential association between human and I. scapularis infections. Human incidence rates were calculated per 100,000 people by county. I. scapularis infection prevalence was calculated as an acarological risk index using active tick surveillance data from the Connecticut Agricultural Experiment Station. The potential association between incidence rates and acarological risk index was analyzed using Spearman Rank correlation. From 2019 to 2020, 420 human cases of anaplasmosis were reported and 148 A. phagocytophilum-infected I. scapularis were identified in Connecticut and a significant positive correlation was identified between acarological risk index and incidence rates. Active tick surveillance is a helpful tool for identifying geographic areas with increased risk of anaplasmosis and can be useful in guiding public health interventions to prevent cases before they occur while also identifying potential locations where underreporting may occur.</p>","PeriodicalId":94091,"journal":{"name":"Journal of medical entomology","volume":" ","pages":"1026-1031"},"PeriodicalIF":0.0,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144059353","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}
Nathanial O'Dell, Bethany G Bolling, Nina Dacko, Joseph T Carr, Bethany Hambrick, Luis F Chaves, Joseph R McMillan
{"title":"Identifying environmental drivers of Aedes aegypti and Aedes albopictus abundance in the Dallas-Fort Worth metroplex using Random Forest modeling.","authors":"Nathanial O'Dell, Bethany G Bolling, Nina Dacko, Joseph T Carr, Bethany Hambrick, Luis F Chaves, Joseph R McMillan","doi":"10.1093/jme/tjaf036","DOIUrl":"10.1093/jme/tjaf036","url":null,"abstract":"<p><p>Aedes aegypti and Aedes albopictus are 2 medically important vectors that have established populations globally. In the United States, Ae. aegypti populations declined post-Ae. albopictus introduction, though both species now can be readily found throughout the Southern US. Despite overlapping distributions, there are few studies that investigate and compare the drivers of abundance at spatial scales relevant to mosquito control and surveillance districts. To address this limitation, we analyzed longitudinal mosquito surveillance data from the Dallas-Fort Worth metroplex, Texas. Dallas-Fort Worth metroplex is an area of interest due to its rapid population growth, diverse environmental conditions, and prior history with epidemic West Nile virus transmission. We trained a Random Forest model on a subset of Ae. aegypti and Ae. albopictus data and meteorological and sociodemographic variables from Tarrant and Dallas counties to predict the abundance of both species within the Dallas-Fort Worth metroplex. Additionally, we interpolated predictions to map mosquito abundance at unsampled locations. We found that Ae. aegypti abundance was positively correlated with hot and dry conditions within densely populated locations, with mean abundance peaking in the 33rd to the 44th weeks of the year. Ae. albopictus abundance was positively correlated with cooler temperatures in higher socio-economic locations with lower human population density, with mean abundance peaking in the 19th to the 32nd weeks of the year. Our results suggest that the diversity of the Dallas-Fort Worth metroplex's environmental conditions enable Ae. aegypti and Ae. albopictus to exploit differential niche spaces, which has the potential to influence vector control strategies and disease prevention efforts.</p>","PeriodicalId":94091,"journal":{"name":"Journal of medical entomology","volume":" ","pages":"789-799"},"PeriodicalIF":0.0,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12271727/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144033357","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}
Nelly Armanda Kala Chouakeu, Mabu Maxim Bindamu, Idriss Nasser Ngangue Siewe, Leslie Nkahe, Laura Gilberine Ningahi, Nina Ghislaine Yensii, Roland Bamou, Parfait Awono-Ambene, Njuabe Theresia Metoh, Timoléon Tchuinkam, Christophe Antonio Nkondjio
{"title":"Assessing the bio-efficacy of mosquito nets in Santchou and Bertoua 1 year after the mass distribution campaign of 2019.","authors":"Nelly Armanda Kala Chouakeu, Mabu Maxim Bindamu, Idriss Nasser Ngangue Siewe, Leslie Nkahe, Laura Gilberine Ningahi, Nina Ghislaine Yensii, Roland Bamou, Parfait Awono-Ambene, Njuabe Theresia Metoh, Timoléon Tchuinkam, Christophe Antonio Nkondjio","doi":"10.1093/jme/tjaf014","DOIUrl":"10.1093/jme/tjaf014","url":null,"abstract":"<p><p>Malaria continues to pose a significant public health challenge in Cameroon, requiring effective prevention strategies. Long-lasting insecticide-treated nets (LLINs) are widely distributed as a key control measure, but their physical integrity and effectiveness need to be monitored. This study aimed to assess the condition and bio-efficacy of LLINs in 2 regions of Cameroon, namely Santchou in the West and Bertoua in the East. The study evaluated LLIN use and care using a structured questionnaire, following World Health Organization (WHO) guidelines for assessing physical integrity. Bio-efficacy was measured using the 3-min WHO cone assay. The results showed that the ownership and usage rates of mosquito nets were 93.91% and 72.70% in Santchou and 60.68% and 41.11% in Bertoua, respectively. In Santchou, 5.26% of LLINs were damaged, with 21.05% rendered unusable while in Bertoua, 29.41% of the used LLINs were damaged with 16.47% unusable. The knockdown rate with field mosquito populations was 65.49% with mortality rate of 61.24% in Bertoua. In Santchou, knockdown rate was 10.23%, and mortality rate 14.97%. The LLINs tested were found highly effective against susceptible strain. These findings urgently require the National Malaria Control Program of Cameroon to improve public awareness on consistent and proper LLIN usage and address the decline in LLIN effectiveness, particularly in cities like Bertoua and Santchou. Targeted interventions should focus on improving LLINs distribution, educating the population on correct usage practices, and implementing regular monitoring of physical integrity and bio-efficacy of insecticide-treated bed nets as these LLINs get degraded.</p>","PeriodicalId":94091,"journal":{"name":"Journal of medical entomology","volume":" ","pages":"876-885"},"PeriodicalIF":0.0,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144001008","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}
{"title":"Emerging approaches to mosquito species identification: an overview with emphasis on nanopore sequencing technology.","authors":"Antsa Rakotonirina, Rutaiwan Dusadeepong, Mallorie Hide, Linavin Vuth, Rina Chea, Kimly Heng, Pierre-Olivier Maquart, Koen Vandelannoote, Sébastien Boyer","doi":"10.1093/jme/tjaf044","DOIUrl":"10.1093/jme/tjaf044","url":null,"abstract":"<p><p>Correct identification of mosquito species is crucial for effective vector control, pathogen surveillance, and research and can be achieved through various methods. In this study, we present a review of the most commonly used method for mosquito species identification. We also benchmark the results of DNA sequencing on the MinION nanopore sequencing device against the morphological identification technique, which remains the cornerstone of mosquito species identification. By using 95 samples from the field, we targeted 2 mitochondrial genes (cytochrome oxidase subunit 1 and 3), and successfully distinguished 3 Culex species from the Vishnui subroup (Culex pseudovishnui, Cx. tritaeniorhynchus, and Cx. vishnui) using amplicon-based targeted Oxford Nanopore Technology sequencing, whereas the morphological method proved less effective. Although amplicon-based targeted Oxford Nanopore Technology sequencing is associated with significant costs, it shows great potential for improving accuracy in mosquito species identification, if adequate financial resources are available.</p>","PeriodicalId":94091,"journal":{"name":"Journal of medical entomology","volume":" ","pages":"760-767"},"PeriodicalIF":0.0,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144047648","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}
Sara Baz-Flores, Raúl Cuadrado-Matías, Cesar Herraiz, Alfonso Peralbo-Moreno, Isabel G Fernández de Mera, Francisco Ruiz-Fons
{"title":"Insights into Crimean-Congo hemorrhagic fever virus exposure probability: a period cross-sectional study in wild and domestic ungulates.","authors":"Sara Baz-Flores, Raúl Cuadrado-Matías, Cesar Herraiz, Alfonso Peralbo-Moreno, Isabel G Fernández de Mera, Francisco Ruiz-Fons","doi":"10.1093/jme/tjaf063","DOIUrl":"10.1093/jme/tjaf063","url":null,"abstract":"<p><p>Crimean-Congo hemorrhagic fever (CCHF) is an emerging tick-borne human disease in Spain. Although CCHF is mainly confined to humans, the CCHF virus (CCHFV) can infect several vertebrate species. To predict high-risk exposure areas for public health interventions, it is essential to understand the factors that determine the risk of exposure to CCHFV through animal models. We conducted a cross-sectional study over a defined period (1999 to 2022) on various wild and domestic ungulate species in Castilla-La Mancha (CLM), south-central Spain. We analyzed 6,236 sera of ungulates using a specific double-antigen ELISA to assess CCHFV exposure spatial distribution. We modeled exposure probability with host and environmental predictors using generalized linear mixed models with a binomial distribution. Anti-CCHFV antibodies were detected in 3,531 sera (56.6%; 95% CI: 55.4 to 57.9%), with the greatest exposure rates in western and southern CLM. The red deer (Cervus elaphus Linnaeus, 1758) exhibited the highest seroprevalence (76.45%; 95%CI: 75.1 to 77.7%), and the best-fit statistical model indicated that it was the species with the highest risk of exposure. The most relevant predictors of virus exposure risk were shrubland cover, small ruminant density, wild ungulate density, and woodland cover. The spatial projection of the best-fit model identified high-risk foci in most of western and southwestern CLM but also in limited areas across the region. Our results demonstrate that serological surveys conducted on various CCHFV vector hosts serve as a potent, robust, and highly informative resource for public health authorities to address and prevent human CCHF cases in enzootic and emergency situations.</p>","PeriodicalId":94091,"journal":{"name":"Journal of medical entomology","volume":" ","pages":"1009-1020"},"PeriodicalIF":0.0,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144512986","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}
Isobel Ronai, Julia C Frederick, Alec T Thompson, Prisha Sharma, Michael J Yabsley, Utpal Pal, Cassandra G Extavour, Travis C Glenn
{"title":"Duplex PCR assay to determine sex and mating status of Ixodes scapularis (Acari: Ixodidae), vector of the Lyme disease pathogen.","authors":"Isobel Ronai, Julia C Frederick, Alec T Thompson, Prisha Sharma, Michael J Yabsley, Utpal Pal, Cassandra G Extavour, Travis C Glenn","doi":"10.1093/jme/tjaf043","DOIUrl":"10.1093/jme/tjaf043","url":null,"abstract":"<p><p>Ticks are a major health threat to humans and other animals, through direct damage, toxicoses, and transmission of pathogens. An estimated half a million people are treated annually in the United States for Lyme disease, a disease caused by the bite of a black-legged tick (Ixodes scapularis Say, 1821) infected with the bacterial pathogen Borrelia burgdorferi. This tick species also transmits another 6 human-disease causing pathogens, for which vaccines are currently unavailable. While I. scapularis are sexually dimorphic at the adult life stage, DNA sequence differences between male and female I. scapularis that could be used as a sex-specific marker have not yet been established. Here we identify sex-specific DNA sequences for I. scapularis (male heterogametic system with XY), using whole-genome resequencing and restriction site-associated DNA sequencing. Then we identify a male-specific marker that we use as the foundation of a molecular sex identification method (duplex PCR) to differentiate the sex of an I. scapularis tick. In addition, we provide evidence that this molecular sexing method can establish the mating status of adult females that have been mated and inseminated with male-determining sperm. Our molecular tool allows the characterization of mating and sex-specific biology for I. scapularis, a major pathogen vector, which is crucial for a better understanding of their biology and controlling tick populations.</p>","PeriodicalId":94091,"journal":{"name":"Journal of medical entomology","volume":" ","pages":"800-807"},"PeriodicalIF":0.0,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12271729/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144036058","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}
Francesca I Rubino, Emily Pascoe, Zachary A Barrand
{"title":"Spring fever: early spring predicts Ixodes pacificus (Acari: Ixodidae) activity in northwestern California.","authors":"Francesca I Rubino, Emily Pascoe, Zachary A Barrand","doi":"10.1093/jme/tjaf047","DOIUrl":"10.1093/jme/tjaf047","url":null,"abstract":"<p><p>In the far western United States, the bacterial agent of Lyme disease, Borrelia burgdorferi sensu lato, is primarily transmitted to humans by the nymphal stage of the western black-legged tick, Ixodes pacificus. Predicting nymphal tick abundance would benefit public health but is complicated by the tick's complex multi-year life cycle and data limitations. To address this, we used readily available climate data, a long-term dataset from northwestern California, and time lags based on the tick's life cycle. Our model showed that warmer early spring temperatures during non-drought conditions the year prior predicted higher nymphal tick densities, while hot, dry springs the year prior were linked to earlier peaks in their abundance. Incorporating human-induced climate change projections, we predicted earlier peaks of nymphal tick activity over the next century, with the potential for an initial doubling in questing nymph numbers. This approach provides a valuable tool for public health and offers insights into the changing dynamics of Lyme disease ecology in the far-western US.</p>","PeriodicalId":94091,"journal":{"name":"Journal of medical entomology","volume":" ","pages":"938-947"},"PeriodicalIF":0.0,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12271724/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144046688","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}
{"title":"All insects matter: a review of 160 entomology cases from 1993 to 2007 in Switzerland-Part II (Coleoptera, Hymenoptera, and Lepidoptera).","authors":"Pavel Jakubec, Jiri Hodecek","doi":"10.1093/jme/tjaf051","DOIUrl":"10.1093/jme/tjaf051","url":null,"abstract":"<p><p>This article is the second part of the series analyzing the families recorded from 160 real cases in Switzerland between 1993 and 2007, focusing on species from orders Coleoptera, Hymenoptera, and Lepidoptera. A total of 46 distinct taxonomical units belonging to 15 families were identified. The most prominent was subfamily Silphinae with 9 recorded species, which was also the most dominant group in the dataset, occurring in 17.6% of all cases. It was closely followed by Dermestidae (12.6%), Histeridae (12.6%), and Staphylinidae (excluding Silphinae) (11.9%). The study highlights the importance and utility of a number of lesser-known species, at least in a forensic context, and gives insight into their ecology. We firmly believe that all insects matter. While not every species may become widely used, the more we learn about them, the greater the benefits for future criminal investigations.</p>","PeriodicalId":94091,"journal":{"name":"Journal of medical entomology","volume":" ","pages":"828-839"},"PeriodicalIF":0.0,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144047388","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}