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https://www.readbyqxmd.com/read/28639690/variation-in-host-preferences-of-malaria-mosquitoes-is%C3%A2-mediated-by-skin-bacterial-volatiles
#1
A O Busula, W Takken, J G DE Boer, W R Mukabana, N O Verhulst
The host preferences of the anthropophilic mosquito species in the Anopheles gambiae complex (Diptera: Culicidae) are mediated by skin bacterial volatiles. However, it is not known whether these mosquitoes respond differentially to skin bacterial volatiles from non-human host species. In this study, the responses of two malaria mosquito species in the An.  gambiae complex, Anopheles gambiae s.s. (hereafter, An. gambiae) and Anopheles arabiensis, with different host preferences, to volatiles released from skin bacteria were tested...
June 22, 2017: Medical and Veterinary Entomology
https://www.readbyqxmd.com/read/28626536/school-based-health-education-in-yucatan-mexico-about-the-chikungunya-virus-and-mosquito-illness-prevention
#2
Monica Seungah Choo, R Alexander Blackwood
The Chikungunya virus (CHIKV) has been rapidly spreading throughout Latin America, utilizing pre-existing vectors to infiltrate the immunologically naïve populations. With the current rise of the Zika Virus, there is an urgent need for more rigorous vector control efforts to prevent further Zika breakout. We designed a school-based education module on CHIKV and mosquito prevention and presented it to the local students of ages of 6-18 in a rural town called Sudzal in Yucatan, Mexico. We distributed questionnaires before and after education to test the students' knowledge of CHIKV and mosquito prevention...
May 31, 2017: Infectious Disease Reports
https://www.readbyqxmd.com/read/28616473/ten-years-of-the-tiger-aedes-albopictus-presence-in-australia-since-its-discovery-in-the-torres-strait-in-2005
#3
REVIEW
Andrew F van den Hurk, Jay Nicholson, Nigel W Beebe, Joe Davis, Odwell M Muzari, Richard C Russell, Gregor J Devine, Scott A Ritchie
The "Asian tiger mosquito", Aedes albopictus, is highly invasive, an aggressive biter and a major arbovirus vector. It is not currently present on mainland Australia despite being intercepted on numerous occasions at international ports and infesting the Torres Strait of Australia since at least 2004. In the current paper, we describe the invasion and current status of Ae. albopictus in the Torres Strait, as well as research conducted to assess the threat of this species becoming established in arbovirus transmission cycles on the Australian mainland...
December 2016: One Health
https://www.readbyqxmd.com/read/28606155/complete-genome-sequence-of-t-ho-virus-a-novel-putative-flavivirus-from-the-yucatan-peninsula-of-mexico
#4
Thomas Briese, Maria A Loroño-Pino, Julian E Garcia-Rejon, Jose A Farfan-Ale, Carlos Machain-Williams, Karin S Dorman, W Ian Lipkin, Bradley J Blitvich
BACKGROUND: We previously reported the discovery of a novel, putative flavivirus designated T'Ho virus in Culex quinquefasciatus mosquitoes in the Yucatan Peninsula of Mexico. A 1358-nt region of the NS5 gene was amplified and sequenced but an isolate was not recovered. RESULTS: The complete genome of T'Ho virus was sequenced using a combination of unbiased high-throughput sequencing, 5' and 3' rapid amplification of cDNA ends, reverse transcription-polymerase chain reaction and Sanger sequencing...
June 12, 2017: Virology Journal
https://www.readbyqxmd.com/read/28605549/socio-ecological-mechanisms-supporting-high-densities-of-aedes-albopictus-diptera-culicidae-in-baltimore-md
#5
E Little, D Biehler, P T Leisnham, R Jordan, S Wilson, S L LaDeau
Social, ecological, and climatic factors interact creating a heterogeneous matrix that determines the spatiotemporal distribution of mosquitoes and human risks of exposure to the diseases they transmit. We explore linkages between the social and institutional processes behind residential abandonment, urban ecology, and the interactions of socio-ecological processes with abiotic drivers of mosquito production. Specifically, we test the relative roles of infrastructure degradation and vegetation for explaining the presence of Aedes albopictus Skuse 1894 to better predict spatial heterogeneity in mosquito exposure risk within urban environments...
June 12, 2017: Journal of Medical Entomology
https://www.readbyqxmd.com/read/28599659/zika-vector-transmission-risk-in-temperate-australia-a-vector-competence-study
#6
Jean-Bernard Duchemin, Peter T Mee, Stacey E Lynch, Ravikiran Vedururu, Lee Trinidad, Prasad Paradkar
BACKGROUND: Zika virus is an emerging pathogen of global importance. It has been responsible for recent outbreaks in the Americas and in the Pacific region. This study assessed five different mosquito species from the temperate climatic zone in Australia and included Aedes albopictus as a potentially invasive species. METHODS: Mosquitoes were orally challenged by membrane feeding with Zika virus strain of Cambodia 2010 origin, belonging to the Asian clade. Virus infection and dissemination were assessed by quantitative PCR on midgut and carcass after dissection...
June 9, 2017: Virology Journal
https://www.readbyqxmd.com/read/28595653/habitat-productivity-and-pyrethroid-susceptibility-status-of-aedes-aegypti-mosquitoes-in-dar-es-salaam-tanzania
#7
Leah Mathias, Vito Baraka, Anitha Philbert, Ester Innocent, Filbert Francis, Gamba Nkwengulila, Eliningaya J Kweka
BACKGROUND: Aedes aegypti (Diptera: Culicidae) is the main vector of the dengue virus globally. Dengue vector control is mainly based on reducing the vector population through interventions, which target potential breeding sites. However, in Tanzania, little is known about this vector's habitat productivity and insecticide susceptibility status to support evidence-based implementation of control measures. The present study aimed at assessing the productivity and susceptibility status of A...
June 9, 2017: Infectious Diseases of Poverty
https://www.readbyqxmd.com/read/28590221/evaluation-of-pyriproxyfen-dissemination-via-aedes-albopictus-from-a-point-source-larvicide-application-in-northeast-florida
#8
Aaron M Lloyd, Muhammad Farooq, Alden S Estep, Rui-De Xue, Daniel L Kline
The Asian tiger mosquito, Aedes albopictus , ranks among the most important vectors of dengue fever, Zika virus, and chikungunya virus. With no specific medications or vaccines available, vector control is the only way to combat these diseases. Autodissemination of the insect growth regulator pyriproxyfen (NyGuard®) from a point-source treatment was evaluated in field settings in northeast Florida. The objective of this study was to investigate the possibility of pyriproxyfen dissemination from a treatment site to nontreated oviposition sites via the skip oviposition behavior of Ae...
June 2017: Journal of the American Mosquito Control Association
https://www.readbyqxmd.com/read/28584705/pond-dyes-are-culex-mosquito-oviposition-attractants
#9
Natali Ortiz Perea, Amanda Callaghan
BACKGROUND: British mosquito population distribution, abundance, species composition and potential for mosquito disease transmission are intimately linked to the physical environment. The presence of ponds and water storage can significantly increase the density of particular mosquito species in the garden. Culex pipiens is the mosquito most commonly found in UK gardens and a potential vector of West Nile Virus WNV, although the current risk of transmission is low. However any factors that significantly change the distribution and population of C...
2017: PeerJ
https://www.readbyqxmd.com/read/28580545/polymer-nanoparticles-containing-essential-oils-new-options-for-mosquito-control
#10
Jorge Omar Werdin González, Emiliano Nicolás Jesser, Cristhian Alan Yeguerman, Adriana Alicia Ferrero, Beatriz Fernández Band
Mosquitoes (Diptera: Culicidae) are vectors of important parasites and pathogens causing death, poverty and social disability worldwide. The overuse of synthetic insecticides to control mosquito vectors lead to resistance, adverse environmental effects and high operational costs. Therefore, the development of eco-friendly control tools is an important public health challenge. In this study, two different essential oils (EO) (geranium, Geranium maculatum, and bergamot, Citrus bergamia) loaded polymeric nanoparticle (PN) were elaborated using polyethylene glycol (PEG) and chitosan (Qx) as the polymeric matrix/coating...
June 3, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28562637/identification-of-diagnostic-peptide-regions-that-distinguish-zika-virus-from-related-mosquito-borne-flaviviruses
#11
Alexandra J Lee, Roshni Bhattacharya, Richard H Scheuermann, Brett E Pickett
Zika virus (ZIKV) is a member of the Flavivirus genus of positive-sense single-stranded RNA viruses, which includes Dengue, West Nile, Yellow Fever, and other mosquito-borne arboviruses. Infection by ZIKV can be difficult to distinguish from infection by other mosquito-borne Flaviviruses due to high sequence similarity, serum antibody cross-reactivity, and virus co-circulation in endemic areas. Indeed, existing serological methods are not able to consistently differentiate ZIKV from other Flaviviruses, which makes it extremely difficult to accurately calculate the incidence rate of Zika-associated Guillain-Barre in adults, microcephaly in newborns, or asymptomatic infections within a geographical area...
2017: PloS One
https://www.readbyqxmd.com/read/28558764/elimination-of-plasmodium-falciparum-malaria-in-tajikistan
#12
Anatoly V Kondrashin, Azizullo S Sharipov, Dilshod S Kadamov, Saifuddin S Karimov, Elkhan Gasimov, Alla M Baranova, Lola F Morozova, Ekaterina V Stepanova, Natalia A Turbabina, Maria S Maksimova, Evgeny N Morozov
Malaria was eliminated in Tajikistan by the beginning of the 1960s. However, sporadic introduced cases of malaria occurred subsequently probably as a result of transmission from infected mosquito Anopheles flying over river the Punj from the border areas of Afghanistan. During the 1970s and 1980s local outbreaks of malaria were reported in the southern districts bordering Afghanistan. The malaria situation dramatically changed during the 1990s following armed conflict and civil unrest in the newly independent Tajikistan, which paralyzed health services including the malaria control activities and a large-scale malaria epidemic occurred with more than 400,000 malaria cases...
May 30, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28552953/a-unique-profilin-actin-interface-is-important-for-malaria-parasite-motility
#13
Catherine A Moreau, Saligram P Bhargav, Hirdesh Kumar, Katharina A Quadt, Henni Piirainen, Léanne Strauss, Jessica Kehrer, Martin Streichfuss, Joachim P Spatz, Rebecca C Wade, Inari Kursula, Friedrich Frischknecht
Profilin is an actin monomer binding protein that provides ATP-actin for incorporation into actin filaments. In contrast to higher eukaryotic cells with their large filamentous actin structures, apicomplexan parasites typically contain only short and highly dynamic microfilaments. In apicomplexans, profilin appears to be the main monomer-sequestering protein. Compared to classical profilins, apicomplexan profilins contain an additional arm-like β-hairpin motif, which we show here to be critically involved in actin binding...
May 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28539441/chikungunya-virus-overcomes-polyamine-depletion-by-mutation-of-nsp1-and-the-opal-stop-codon-to-confer-enhanced-replication-and-fitness
#14
Bryan C Mounce, Teresa Cesaro, Lea Vlajnić, Anna Vidiņa, Thomas Vallet, James Weger-Lucarelli, Gabriella Pasoni, Kenneth A Stapleford, Jean-Pierre Levraud, Marco Vignuzzi
Polyamines, small positively-charge molecules present in all cells, play important roles in the replication of DNA and RNA viruses. Chikungunya virus (CHIKV) relies on polyamines for translation of the viral genome upon viral entry, and pharmacological depletion of polyamines limits viral replication. However, the potential development of antiviral resistance necessitates a better understanding of how polyamines function and can be targeted via compounds that alter polyamine levels. We have isolated CHIKV that is resistant to polyamine depletion that contains two mutations in the non-structural protein 1 (nsP1) coding region in combination with mutation to the opal stop codon preceding nsP4...
May 24, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28534105/bacterial-diversity-of-cosmopolitan-culex-pipiens-and-invasive-aedes-japonicus-from-germany
#15
Sina Zotzmann, Antje Steinbrink, Kathrin Schleich, Felix Frantzmann, Chinhda Xoumpholphakdy, Manuela Spaeth, Claire Valiente Moro, Patrick Mavingui, Sven Klimpel
Symbiotic bacteria have gained significant attention in recent years. For example, microbiota of some mosquito species seems to influence the development and transmission of pathogens. Furthermore, several attempts using bacteria as a paratransgenetic tool have been made in order to assist the control of mosquito-borne diseases. In this study, we examined the bacterial diversity of wild-caught adult Culex (Cx.) pipiens and laboratory-reared adult Aedes japonicus (Ae. japonicus) in Germany using a culture-independent method...
July 2017: Parasitology Research
https://www.readbyqxmd.com/read/28533956/toxicity-repellency-and-flushing-out-in-triatoma-infestans-hemiptera-reduviidae-exposed-to-the-repellents-deet-and-ir3535
#16
Mercedes M N Reynoso, Emilia A Seccacini, Javier A Calcagno, Eduardo N Zerba, Raúl A Alzogaray
DEET and IR3535 are insect repellents present worldwide in commercial products; their efficacy has been mainly evaluated in mosquitoes. This study compares the toxicological effects and the behavioral responses induced by both repellents on the blood-sucking bug Triatoma infestans Klug (Hemiptera: Reduviidae), one of the main vectors of Chagas disease. When applied topically, the Median Lethal Dose (72 h) for DEET was 220.8 µg/insect. Using IR3535, topical application of 500 µg/insect killed no nymphs. The minimum concentration that produced repellency was the same for both compounds: 1,15 µg/cm(2)...
2017: PeerJ
https://www.readbyqxmd.com/read/28526032/multiplex-dnase-free-one-step-reverse-transcription-pcr-for-plasmodium-18s-rrna-and-spliced-gametocyte-specific-mrnas
#17
Amelia E Hanron, Zachary P Billman, Annette M Seilie, Tayla M Olsen, Matthew Fishbaugher, Ming Chang, Thomas Rueckle, Nicole Andenmatten, Bryan Greenhouse, Emmanuel Arinaitwe, John Rek, Smita Das, Gonzalo J Domingo, Kelly Shipman, Stefan H Kappe, James G Kublin, Sean C Murphy
BACKGROUND: Plasmodium gametocytes are sexual stages transmitted to female Anopheles mosquitoes. While Plasmodium parasites can be differentiated microscopically on Giemsa-stained blood smears, molecular methods are increasingly used because of their increased sensitivity. Molecular detection of gametocytes requires methods that discriminate between asexual and sexual stage parasites. Commonly tested gametocyte-specific mRNAs are pfs25 and pfs230 detected by reverse transcription polymerase chain reaction (RT-PCR)...
May 19, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28525986/the-lspc3-41i-restriction-modification-system-is-the-major-determinant-for-genetic-manipulations-of-lysinibacillus-sphaericus-c3-41
#18
Pan Fu, Yong Ge, Yiming Wu, Ni Zhao, Zhiming Yuan, Xiaomin Hu
BACKGROUND: Lysinibacillus sphaericus has been widely used in integrated mosquito control program and it is one of the minority bacterial species unable to metabolize carbohydrates. In consideration of the high genetic conservation at genomic level and difficulty of genetic horizontal transfer, it is hypothesized that effective restriction-modification (R-M) systems existed in mosquitocidal L. sphaericus. RESULTS: In this study, six type II R-M systems including LspC3-41I were predicted in L...
May 19, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28520737/outdoor-spatial-spraying-against-dengue-a-false-sense-of-security-among-inhabitants-of-hermosillo-mexico
#19
Pablo A Reyes-Castro, Lucía Castro-Luque, Rolando Díaz-Caravantes, Kathleen R Walker, Mary H Hayden, Kacey C Ernst
BACKGROUND: Government-administered adulticiding is frequently conducted in response to dengue transmission worldwide. Anecdotal evidence suggests that spraying may create a "false sense of security" for residents. Our objective was to determine if there was an association between residents' reporting outdoor spatial insecticide spraying as way to prevent dengue transmission and both their reported frequency of dengue prevention practices and household entomological indices in Hermosillo, Mexico...
May 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28515886/aquatic-microfauna-alter-larval-food-resources-and-affect-development-and-biomass-of-west-nile-and-saint-louis-encephalitis-vector-culex-nigripalpus-diptera-culicidae
#20
Dagne Duguma, Michael G Kaufman, Arthur B Simas Domingos
Ciliate protists and rotifers are ubiquitous in aquatic habitats and can comprise a significant portion of the microbial food resources available to larval mosquitoes, often showing substantial declines in abundance in the presence of mosquito larvae. This top-down regulation of protists is reported to be strong for mosquitoes inhabiting small aquatic containers such as pitcher plants or tree holes, but the nature of these interactions with larval mosquitoes developing in other aquatic habitats is poorly understood...
May 2017: Ecology and Evolution
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