Journal of Medical Entomology最新文献

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Bacterial communities and prevalence of antibiotic resistance genes carried within house flies (Diptera: Muscidae) associated with beef and dairy cattle farms. 与肉牛和奶牛养殖场有关的家蝇(双翅目:蝇科)携带的细菌群落和抗生素抗性基因的流行情况。
IF 2.1 3区 农林科学
Journal of Medical Entomology Pub Date : 2023-11-14 DOI: 10.1093/jme/tjad112
Saraswoti Neupane, Justin L Talley, David B Taylor, Dana Nayduch
{"title":"Bacterial communities and prevalence of antibiotic resistance genes carried within house flies (Diptera: Muscidae) associated with beef and dairy cattle farms.","authors":"Saraswoti Neupane, Justin L Talley, David B Taylor, Dana Nayduch","doi":"10.1093/jme/tjad112","DOIUrl":"10.1093/jme/tjad112","url":null,"abstract":"<p><p>House flies (Musca domestica Linnaeus) are vectors of human and animal pathogens at livestock operations. Microbial communities in flies are acquired from, and correlate with, their local environment. However, variation among microbial communities carried by flies from farms in different geographical areas is not well understood. We characterized bacterial communities of female house flies collected from beef and dairy farms in Oklahoma, Kansas, and Nebraska using 16S rDNA amplicon sequencing and PCR. Bacterial community composition in house flies was affected by farm type and location. While the shared number of taxa between flies from beef or dairy farms was low, those taxa accounted >97% of the total bacterial community abundance. Bacterial species richness was 4% greater in flies collected from beef than in those collected from dairy farms and varied by farm type within states. Several potential pathogenic taxa were highly prevalent, comprising a core bacterial community in house flies from cattle farms. Prevalence of the pathogens Moraxella bovis and Moraxella bovoculi was greater in flies from beef farms relative to those collected on dairy cattle farms. House flies also carried bacteria with multiple tetracycline and florfenicol resistance genes. This study suggests that the house flies are significant reservoirs and disseminators of microbial threats to human and cattle health.</p>","PeriodicalId":16325,"journal":{"name":"Journal of Medical Entomology","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10115402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Seasonal distribution of Calliphoridae and Mesenbrinellidae (Diptera) associated with the decomposition of a clothed animal model in a forest reserve in the Central Amazon. 中亚马逊森林保护区中与服装动物模型分解有关的丽蝇科和Mesenbriellidae(直翅目)的季节分布。
IF 2.1 3区 农林科学
Journal of Medical Entomology Pub Date : 2023-09-12 DOI: 10.1093/jme/tjad082
Alex Sandro Barros de Souza, Daniela Agra, Renato Tavares Martins, Patrícia Pereira Gomes, Ruth Leila Ferreira-Keppler
{"title":"Seasonal distribution of Calliphoridae and Mesenbrinellidae (Diptera) associated with the decomposition of a clothed animal model in a forest reserve in the Central Amazon.","authors":"Alex Sandro Barros de Souza,&nbsp;Daniela Agra,&nbsp;Renato Tavares Martins,&nbsp;Patrícia Pereira Gomes,&nbsp;Ruth Leila Ferreira-Keppler","doi":"10.1093/jme/tjad082","DOIUrl":"10.1093/jme/tjad082","url":null,"abstract":"<p><p>We evaluated the effects of seasonality on the richness and abundance of dipterans of the families Calliphoridae and Mesembrinellidae associated with the decomposition of a clothed Large White swine Sus scrofa domesticus(Artiodactyla: Suidae) carcass. Experiments were carried out in less rainy, rainy, and intermediate periods between 2010 and 2011 at Reserva Florestal Ducke, Manaus, Amazonas. Two pig carcasses, each weighing approximately 40 kg, were used in each period. A total of 63,872 individuals of 18 species of Calliphoridae and Mesembrinellidae were collected. The abundance and richness of these dipteran families were influenced by the interaction between period and decomposition stage. The compositions of the Calliphoridae and Mesembrinellidae assemblages differed among periods, with the fauna of the less rainy period being less similar to those of the intermediate and rainy periods than they were to each other. Three species were selected as indicators for the less rainy period, namely Paralucilia pseudolyrcea (Mello, 1969) (Diptera, Calliphoridae), Paralucilia nigrofacialis (Mello, 1969) (Diptera, Calliphoridae), and Eumesembrinella randa (Walker, 1849) (Diptera,Mesembrinellidae) while Chloroprocta idioidea (Robineau-Desvoidy, 1830) (Dipetra, Calliphoridae) was selected as an indicator species for the rainy period; no taxon was selected as an indicator of the intermediate period. Among decomposition stages, only fermentation and black putrefaction had indicator taxa, with Hemilucilia souzalopesi Mello, 1972 (Diptera, Calliphoridae and Chysomya putoria(Wiedemann, 1830) (Diptera, Calliphoridae), respectively. Clothes did not prevent the laying of eggs and became a kind of protection for immature stages. The clothed model presented a delay in decomposition compared to other studies developed in the Amazon region.</p>","PeriodicalId":16325,"journal":{"name":"Journal of Medical Entomology","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10215435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Examining the gut microbiota from several human-biting tick species in Northwestern Spain. 研究西班牙西北部几种人类叮咬蜱虫的肠道微生物群。
IF 2.1 3区 农林科学
Journal of Medical Entomology Pub Date : 2023-09-12 DOI: 10.1093/jme/tjad084
Giovanny Herrera, María Carmen Vieira Lista, Luisa Páez-Triana, Antonio Muro, Julio López-Abán, Marina Muñoz, Juan David Ramírez
{"title":"Examining the gut microbiota from several human-biting tick species in Northwestern Spain.","authors":"Giovanny Herrera,&nbsp;María Carmen Vieira Lista,&nbsp;Luisa Páez-Triana,&nbsp;Antonio Muro,&nbsp;Julio López-Abán,&nbsp;Marina Muñoz,&nbsp;Juan David Ramírez","doi":"10.1093/jme/tjad084","DOIUrl":"10.1093/jme/tjad084","url":null,"abstract":"<p><p>Tick-borne diseases have increased significantly in Europe and Spain in recent years. One strategy explored for tick surveillance and control is the study of the microbiota. The focus is on understanding the relationships between pathogens and endosymbionts within the microbiota and how these relationships can alter these arthropods' vectorial capacity. Thus, it is pivotal to depict the bacterial communities composing the microbiota of ticks present in specific territories. This work aimed to describe the microbiota present in 29 adult individuals of 5 tick species collected from 4 provinces of Castilla y Leon in northwestern Spain from 2015 to 2022. DNA extraction and sequencing of the V4 hypervariable region of 16S-rRNA was performed on the tick samples, with subsequent analysis of diversity, taxonomic composition, and correlations between genera of microorganisms. There were no differences in the alpha diversity of microbiota by tick species, nor were compositional changes evident at the phylum level for microorganisms. However, interindividual differences at the microbial genus level allowed spatial differentiation of the 5 tick species included in the study. Correlation analyses showed complex interactions between different genera of microbiota members. These findings provide an initial insight into the composition of the gut microbiota of various tick species in northwestern Spain, which can contribute to establishing surveillance and control measures to reduce diseases such as rickettsiosis, Lyme disease, and Crimean-Congo hemorrhagic fever.</p>","PeriodicalId":16325,"journal":{"name":"Journal of Medical Entomology","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10218766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Ultra-low volume (ULV) adulticide treatment impacts age structure of Culex species (Diptera: Culicidae) in a West Nile virus hotspot. 在西尼罗河病毒热点地区,超低剂量(ULV)诱杀剂处理影响了库蚊属物种(直翅目:库蚊科)的年龄结构。
IF 2.1 3区 农林科学
Journal of Medical Entomology Pub Date : 2023-09-12 DOI: 10.1093/jme/tjad088
Kristina Lopez, Patrick Irwin, Gebienna M Bron, Susan Paskewitz, Lyric Bartholomay
{"title":"Ultra-low volume (ULV) adulticide treatment impacts age structure of Culex species (Diptera: Culicidae) in a West Nile virus hotspot.","authors":"Kristina Lopez, Patrick Irwin, Gebienna M Bron, Susan Paskewitz, Lyric Bartholomay","doi":"10.1093/jme/tjad088","DOIUrl":"10.1093/jme/tjad088","url":null,"abstract":"<p><p>West Nile virus (WNV) invaded the continental United States over 20 years ago and continues to cause yearly seasonal outbreaks of human and veterinary disease. In the suburbs of Chicago, Illinois, ultra-low volume (ULV) truck-mounted adulticide spraying frequently is performed to reduce populations of Culex restuans Theobald and Cx. pipiens L. mosquitoes (Diptera: Culicidae) in an effort to lower the risk of WNV transmission. The effectiveness of this control method has not been rigorously evaluated, and evidence for Culex population reduction after ULV adulticide spraying has been inconclusive. Therefore, we evaluated the results of 5 sequential weekly truck-mounted adulticide applications of Zenivex® E20 (etofenprox) in 2 paired sites located in Cook County, IL, during the summer of 2018. Mosquito population abundance, age structure, and WNV infection prevalence were monitored and compared between paired treatment and nearby control sites. Adulticide treatment did not result in consistent short-term or long-term reductions in target WNV vector Culex abundance. However, there was a significant increase in the proportion of nulliparous females in the treated sites compared to control sites and a decrease in Cx. pipiens WNV infection rates at one of the treated sites. This evidence that ULV adulticide spraying altered the age structure and WNV infection prevalence in a vector population has important implications for WNV transmission risk management. Our findings also underscore the importance of measuring these important indicators in addition to abundance metrics when evaluating the efficacy of control methods.</p>","PeriodicalId":16325,"journal":{"name":"Journal of Medical Entomology","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10273060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A multiplex PCR assay for the identification of 5 sibling species of the Lindesayi Complex of the genus Anopheles (Diptera: Culicidae) in Bhutan. 用多重PCR方法鉴定不丹按蚊属Lindesayi复合体的5个同胞种。
IF 2.1 3区 农林科学
Journal of Medical Entomology Pub Date : 2023-09-12 DOI: 10.1093/jme/tjad089
Li Zhou, Rinsin Namgay, Atiporn Saeung, Jassada Saingamsook, Thanari Phanitchakun, Ralph E Harbach, Pradya Somboon
{"title":"A multiplex PCR assay for the identification of 5 sibling species of the Lindesayi Complex of the genus Anopheles (Diptera: Culicidae) in Bhutan.","authors":"Li Zhou,&nbsp;Rinsin Namgay,&nbsp;Atiporn Saeung,&nbsp;Jassada Saingamsook,&nbsp;Thanari Phanitchakun,&nbsp;Ralph E Harbach,&nbsp;Pradya Somboon","doi":"10.1093/jme/tjad089","DOIUrl":"10.1093/jme/tjad089","url":null,"abstract":"<p><p>Five sibling species of the Lindesayi Complex of the genus Anopheles have been discovered in Bhutan: An. druki Somboon, Namgay & Harbach, An. himalayensis Somboon, Namgay & Harbach, An. lindesayi Giles, An. lindesayi species B, and An. thimphuensis Somboon, Namgay & Harbach. The species are morphologically similar in the adult and/or immature stages. This study aimed to develop a multiplex PCR assay to identify the 5 species. Allele-specific primers were designed for specific nucleotide segments of ITS2 sequences previously reported for each species. The assay provided products of 183 bp for An. druki, 338 bp for An. himalayensis, 126 bp for An. lindesayi, 290 bp for An. lindesayi species B, and 370 bp for An. thimphuensis. The use of the assay produced consistent results. The assay is relatively inexpensive, enables the rapid identification of a large number of specimens, and will foster further studies of the Lindesayi Complex.</p>","PeriodicalId":16325,"journal":{"name":"Journal of Medical Entomology","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10209094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Crossing experiments detect partial reproductive isolation among populations of Triatoma longipennis (Hemiptera: Reduviidae: Triatominae). 杂交实验检测了长柄三叶虫(半翅目:红腹蛛科:三叶虫科)种群之间的部分生殖隔离。
IF 2.1 3区 农林科学
Journal of Medical Entomology Pub Date : 2023-09-12 DOI: 10.1093/jme/tjad087
José Alejandro Martínez-Ibarra, Benjamín Nogueda-Torres, Tzintli Meraz-Medina, Gumercindo Goicochea Del Rosal
{"title":"Crossing experiments detect partial reproductive isolation among populations of Triatoma longipennis (Hemiptera: Reduviidae: Triatominae).","authors":"José Alejandro Martínez-Ibarra,&nbsp;Benjamín Nogueda-Torres,&nbsp;Tzintli Meraz-Medina,&nbsp;Gumercindo Goicochea Del Rosal","doi":"10.1093/jme/tjad087","DOIUrl":"10.1093/jme/tjad087","url":null,"abstract":"<p><p>Chagas disease is an important vector-borne disease endemic in Mexico. Of the 33 triatomine species found in Mexico, Triatoma longipennis (Usinger) is considered among the most important because of its infection indices, capacity for transmitting Trypanosoma cruzi (Chagas), and its distribution areas. Here, we describe the results of a reproductive isolation analysis among 5 populations of T. longipennis collected from representative areas of Mexico. Fertility and segregation of morphological characteristics were examined in two generations of hybrids. The percentage of pairs with (fertile) offspring varied from 30% to 100% in the parental crosses, while these values varied from 0 to 100% in the intersite crosses. Our results indicate partial reproductive isolation among these populations. These findings shed light on the potential presence of a cryptic species complex of T. longipennis in Mexico.</p>","PeriodicalId":16325,"journal":{"name":"Journal of Medical Entomology","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10209118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Diols and sugar substitutes in attractive toxic sugar baits targeting Aedes aegypti and Aedes albopictus (Diptera: Culicidae) mosquitoes. 针对埃及伊蚊和白纹伊蚊(Diptera:蚊科)蚊子的有吸引力的有毒糖饵中的二醇和糖替代品。
IF 2.1 3区 农林科学
Journal of Medical Entomology Pub Date : 2023-09-12 DOI: 10.1093/jme/tjad072
Heidi Pullmann-Lindsley, Ava Bartlett-Miller, Ronald Jason Pitts
{"title":"Diols and sugar substitutes in attractive toxic sugar baits targeting Aedes aegypti and Aedes albopictus (Diptera: Culicidae) mosquitoes.","authors":"Heidi Pullmann-Lindsley,&nbsp;Ava Bartlett-Miller,&nbsp;Ronald Jason Pitts","doi":"10.1093/jme/tjad072","DOIUrl":"10.1093/jme/tjad072","url":null,"abstract":"<p><p>Around the world, mosquitoes continue to transmit disease-causing pathogens and develop resistance to insecticides. We previously discovered that a generally regarded as safe (GRAS) compound, 1,2-propanediol, reduces adult mosquito survivorship when ingested. In this study, we assess and compare 5 more chemically related compounds for mosquito lethality and 8 GRAS sugar substitutes to determine toxicity. We conducted a series of feeding assays to determine if ingesting the compounds influenced mosquito mean survivorship in locally collected lab-reared populations of Aedes aegypti (Diptera, Culicidae, Linnaeus, 1762) and Aedes albopictus (Diptera, Culicidae, Skuse, 1894) mosquitoes. Our results indicate that 1,2-propanediol, 1,3-propanediol, 1,5-pentanediol, 1,6-hexanediol, 2-methyl-1,3-propanediol, DL-dithiothreitol, acesulfame potassium, allulose, erythritol, sodium saccharin, stevia, and sucralose significantly reduced the mean survivorship of one or both species. Short-term trials with the most toxic compounds revealed that they could substantially affect survivorship after 24 h. We also found that there were different responses in the 2 species and that in several experimental conditions, male mosquitoes expired to a greater extent than female mosquitoes. These findings indicate that several of the compounds are toxic to mosquitoes. Further study is required to determine their effectiveness in attractive toxic sugar baits (ATSBs) as a potential component of population control strategies.</p>","PeriodicalId":16325,"journal":{"name":"Journal of Medical Entomology","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10218303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Population dynamics of Nyssomyia whitmani (Diptera: Psychodidae) in domestic and peridomestic environments in Northeast Argentina, a tegumentary leishmaniasis outbreak area. 阿根廷东北部利什曼病暴发地区生活环境和橄榄岩环境中灰尾Nyssomyia whitmani(直翅目:Psychodidae)的种群动态。
IF 2.1 3区 农林科学
Journal of Medical Entomology Pub Date : 2023-09-12 DOI: 10.1093/jme/tjad061
Mariana Manteca-Acosta, Gerardo Rubén Cueto, Matias Poullain, María Soledad Santini, Oscar Daniel Salomón
{"title":"Population dynamics of Nyssomyia whitmani (Diptera: Psychodidae) in domestic and peridomestic environments in Northeast Argentina, a tegumentary leishmaniasis outbreak area.","authors":"Mariana Manteca-Acosta,&nbsp;Gerardo Rubén Cueto,&nbsp;Matias Poullain,&nbsp;María Soledad Santini,&nbsp;Oscar Daniel Salomón","doi":"10.1093/jme/tjad061","DOIUrl":"10.1093/jme/tjad061","url":null,"abstract":"<p><p>In the present study, the temporal dynamics of the main vector of Leishmania braziliensis, Nyssomyia whitmani, was measured by monthly captures of phlebotominae sandflies during 5 consecutive years (from 2011 to 2016) in the Paranaense region of South America. The captures were performed in environments where the human-vector contact risk is high: domiciliary and peridomiciliary environments in a rural area endemic of tegumentary leishmaniasis. Nyssomyia whitmani was recorded as the dominant species of the phlebotominae ensemble in all domiciliary and peridomiciliary environments (House, Chicken Shed, Pigsty, and Forest Edge). Using generalized additive models, intra- and interannual fluctuations were observed, modulated by meteorological variables such as the minimum temperature and the accumulated precipitation 1 wk prior to capture. The installation of a pigsty by the farmer during the study period allowed us to observe and describe the so-called \"pigsty effect\" where the Ny. whitmani population was spatially redistributed, turning the pigsty as the environment that obtained the highest phlebotominae record counts, thus maintaining the farm overall abundance, supporting the idea that the environmental management of the peridomicile could have an impact on the reduction of epidemiological risk by altering the spatial distribution of the phlebotominae ensemble in the environments.</p>","PeriodicalId":16325,"journal":{"name":"Journal of Medical Entomology","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10220154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Methanol and acetone extracts from the leaves of selected aromatic plants affect survival of field collected Anopheles arabiensis (Diptera: Culicidae) from Kisumu, Kenya. 从所选芳香植物的叶子中提取的甲醇和丙酮影响从肯尼亚基苏木野外采集的阿拉伯按蚊(Diptera:库蚊科)的存活。
IF 2.1 3区 农林科学
Journal of Medical Entomology Pub Date : 2023-09-12 DOI: 10.1093/jme/tjad066
Dimitri Wendgida Wangrawa, Félix Yaméogo, Aboubacar Sombié, Edward Esalimba, Eric Ochomo, Dov Borovsky, Athanase Badolo, Antoine Sanon
{"title":"Methanol and acetone extracts from the leaves of selected aromatic plants affect survival of field collected Anopheles arabiensis (Diptera: Culicidae) from Kisumu, Kenya.","authors":"Dimitri Wendgida Wangrawa,&nbsp;Félix Yaméogo,&nbsp;Aboubacar Sombié,&nbsp;Edward Esalimba,&nbsp;Eric Ochomo,&nbsp;Dov Borovsky,&nbsp;Athanase Badolo,&nbsp;Antoine Sanon","doi":"10.1093/jme/tjad066","DOIUrl":"10.1093/jme/tjad066","url":null,"abstract":"<p><p>The massive and inappropriate use of synthetic insecticides is causing significant and increasing environmental disruption. Therefore, developing effective natural mosquitocidal compounds could be an alternative tool for malarial vector control. The present study investigates the larvicidal and adulticidal effect of methanol and acetone extracts of leaves from Lippia chevalieri, Lippia multiflora, Cymbopogon schoenanthus, and Lantana camara against Anopheles arabiensis, to control the most widespread vector transmitting malaria in sub-Saharan. Africa. Extracts were evaluated following WHO modified test procedure against third- to fourth-instar larvae and, non-blood-fed females from 3- to 5-day-old field populations of An. arabiensis under laboratory conditions using WHO larval and CDC bottle bioassays, respectively. Mortality was recorded after 24-h exposure and several compounds were identified in the extracts. The methanolic and acetonic extracts of L. camara were effective against larvae showing lethal concentrations to 50% (LC50) of the population, at 89.48 and 58.72 ppm, respectively. The acetonic extracts of C. schoenanthus and L. chevalieri showed higher toxicities LC50s of 0.16% and 0.22% against female adults, respectively. The methanolic extracts of L. multiflora and L. chevalieri LC50s were effective at 0.17% and 0.27%, respectively, against female adults. These results indicate that the plant extracts tested may represent effective means to control An. arabiensis when used to treat the surface of the marshes.</p>","PeriodicalId":16325,"journal":{"name":"Journal of Medical Entomology","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10209584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The evening crepuscular host-seeking activity of Anopheles mosquitoes in northeast Brazil. 傍晚时分,巴西东北部的按蚊寻找宿主的活动。
IF 2.1 3区 农林科学
Journal of Medical Entomology Pub Date : 2023-09-12 DOI: 10.1093/jme/tjad071
Benedita Maria Costa-Neta, Francisca Claudia da Silva de Sousa, Eudimara Carvalho de Araújo, Joany da Costa Viana, Jefferson Mesquita Brito, Francinaldo Soares Silva
{"title":"The evening crepuscular host-seeking activity of Anopheles mosquitoes in northeast Brazil.","authors":"Benedita Maria Costa-Neta,&nbsp;Francisca Claudia da Silva de Sousa,&nbsp;Eudimara Carvalho de Araújo,&nbsp;Joany da Costa Viana,&nbsp;Jefferson Mesquita Brito,&nbsp;Francinaldo Soares Silva","doi":"10.1093/jme/tjad071","DOIUrl":"10.1093/jme/tjad071","url":null,"abstract":"<p><p>Studies on the timing of anopheline host-seeking are important for understanding mosquito ecology, behaviors, and possible role in disease transmission. To study the evening crepuscular host-seeking activity of anophelines and the effects of moonlight, anopheline mosquitoes were collected with light traps settled in a livestock area in the Brazilian Cerrado region. Traps (Silva traps) were placed next to animal enclosures at 1.5 m asl. The research was divided in 2 experiments: the first experiment (12 nights) comprised 2 trapping periods, one from 6 PM to 7 PM and one from 7 PM to 6 AM, and the second experiment (16 evenings) divided in three 20-min intervals based on the 3 twilight phases (civil: 6-6:20 PM; nautical: 6:20-6:40 PM; and astronomical: 6:40-7 PM). A total of 2,815 anopheline mosquitoes and 9 species were found. The main species were Anopheles triannulatus s.l., An. argyritarsis, An. goeldii, and An. evanse. Host-seeking mosquitoes were more frequently active during the first hour after sunset, with a significant peak in the second 20-min interval. After that, a decrease in the number of individuals was observed from the astronomical twilight onwards. Moonlight did not affect the evening flight activity of anophelines. By using LED-based passive light traps, the evening arrival time of anophelines at blood-feeding sites was demonstrated, and it may be a key time window for malaria vector control interventions.</p>","PeriodicalId":16325,"journal":{"name":"Journal of Medical Entomology","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10272533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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