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248 results for “Culex”
Figure 2 in Culex (Culex) gaugleri, a new species (Diptera: Culicidae) from India
Figure 2. Culex gaugleri sp. nov. (holotype, female): a) proboscis and maxillary palpi, b) head, c) lateral thorax, d) scutum, and e) dorsal abdomen.
Figure 3 in Culex (Culex) gaugleri, a new species (Diptera: Culicidae) from India
Figure 3. Culex gaugleri sp. nov. (holotype, female), wing with pale spots representation on different veins and dark spot at M-vein.
Figure 3 in Bacterial community associated with Culex quinquefasciatus Say, 1823 (Diptera: Culicidae) from an urban area in the Amazon, Brazil
Figure 3 Phylogenetic tree based on maximum likelihood method using MEGA 11. The numbers shown next to the branches correspond to the percentage of replicate trees that the taxa were clustered together in the bootstrap test (1000 replicates).
Figure 2 in Bacterial community associated with Culex quinquefasciatus Say, 1823 (Diptera: Culicidae) from an urban area in the Amazon, Brazil
Figure 2 Heatmap of sequences with taxonomic assignment to genus level. The color gradient (yellow to purple) represents abundance. Yellow: higher bacterial abundance. Purple: lowest bacterial abundance. Abundance legend corresponds log10(%).
Figure 1 in Bacterial community associated with Culex quinquefasciatus Say, 1823 (Diptera: Culicidae) from an urban area in the Amazon, Brazil
Figure 1 Bar chart of the relative abundance of each bacterial genus per sample. The black bar comprises the genera that show relative abundance of less than 1%.
Fig. 3 in Do container size and predator presence affect Culex (Diptera: Culicidae) oviposition preferences?
Fig. 3. Predator abundance per liter as a function of sampling day and container size. The 100 and 200-L barrels are represented by the closed triangles and closed circles, respectively. The open circles represent the 15-L buckets, and asterisks represent the 1-L cups. The bars represent standard error. Different letters indicate different means among the treatments.
Fig. 2 in Do container size and predator presence affect Culex (Diptera: Culicidae) oviposition preferences?
Fig. 2. Numbers of Culex sp. 1 (left) and C. eduardoi (right) egg rafts as a function of sampling day and container size. The 100 and 200-L barrels are represented by closed triangles and closed circles, respectively. The open circles represent the 15-L buckets, and asterisks represent the 1-L cups. The bars represent standard error. Different letters indicate different means among the treatments.
Fig. 1 in Do container size and predator presence affect Culex (Diptera: Culicidae) oviposition preferences?
Fig. 1. Numbers of eggs rafts number as a function of sampling days and container size.The 100 and 200-L barrels are represented by closed triangles and closed circles, respectively. The open circles represent the 15-L buckets, and asterisks represent the 1-L cups. The bars represent standard error. Different letters indicate different means among the treatments.
Figure 2 in Larvicidal, and cytoxicity of Lepidium sativum L. seed extract against Culex pipiens L. (Diptera: Culicidae)
Figure 2. Percentage hatchability and activity of the ethyl acetate extract of Lepidium sativum against Culex pipiens third instar larvae treated with different concentrations. Significant differences were assessed using one-way ANOVA followed by Tukey's test, with p <0.05 considered to indicate significant differences. Different letters indicate significant differences.
Figure 4 in Larvicidal, and cytoxicity of Lepidium sativum L. seed extract against Culex pipiens L. (Diptera: Culicidae)
Figure 4. Effect of ethyl acetate extract of L. sativum on the morphology of human umbilical vein endothelial cells. The morphological and nuclear features were observed after 24 h incubation and imaged under an inverted microscope (200× magnification). The arrows point to the fragmented DNA.
Figure 3 in Larvicidal, and cytoxicity of Lepidium sativum L. seed extract against Culex pipiens L. (Diptera: Culicidae)
Figure 3. Photomicrographs of midguts of Cx. pipiens larvae demonstrating: (Chouin-Carneiro et al., 2016). Longitudinal sections in the midguts (MG) of control larvae with normal and healthy epithelial cells (Ec), microvilli (Mv), nuclei (n), and regenerative cells (Rc). Notice absence of the lesions. H&E stain. (C-D): Longitudinal sections in midguts of AzE-treated larvae, with blebbing (Bc) and protruding (Pc) of the epithelial cells into the lumen (Lu) of midgut of the larvae and degraded microvilli (DMv). H&E stain.
Figure 1 in Identification of blood meals in field collected Culex pipiens, Anopheles sacharovi and Culex tritaeniorhynchus (Diptera: Culicidae) using the ELISA method
Figure 1. Sampling localities of Anopheles sacharovi, Culex pipiens, Culex tritaeniorhynchus populations (1. Huzurkent, 2. Düziçi, 3. Akhisar, 4. Dalaman, 5. Gelendost, 6. Selçuk, 7. Karataş, 8. Eşme, 9. Türkoğlu, 10. Dörtyol, 11. Kırıkhan, 12. Manavgat, 13. Afyon, 14. Tarsus, 15. Kadirli, 16. Aydın, 17. Kozan, 18. Sandıklı, 19. Dinar, 20. Uşak, 21. Ceyhan, 22. Antalya, 23. Tuzla 24. İzmir, 25. Söke, 26. Kuşadası, 27. Akköy). Red stars indicate locations where Cx. pipiens was sampled, the green diamond shape indicates locations of Cx. tritaeniorhynchus and the blue pins indicate the locations of An. sacharovi.
Figure 2 in Identification of blood meals in field collected Culex pipiens, Anopheles sacharovi and Culex tritaeniorhynchus (Diptera: Culicidae) using the ELISA method
Figure 2. Percentage distributions of single and multiple host meal choices for three mosquito species collected in the Aegean and Mediterranean regions.
Fig. 3. Maximum likelihood tree for Culex species showing the 5 clades representing 5 subgroups. Clade I in Mosquito identification and haemosporidian parasites detection in the enclosure of the African penguins (Spheniscus demersus) at the SANBI zoological garden
Fig. 3. Maximum likelihood tree for Culex species showing the 5 clades representing 5 subgroups. Clade I is the Trifilatus Subgroup (Mattingly and Rageau, 1958) for Cx. torrentium; Clade II and III are the Pipiens Complex; Clade IV the Theileri Subgroup (Sirivanakarn, 1976) for Cx. theileri; and Clade V is the Tarsalis (Edwards, 1932) for Cx. declaratory and Apicinus Subgroups (Edwards, 1932) for Cx. mollis. Lutzia sp. used as outgroups. Sequences from this study are indicated by asterisks (*).
Figure 1 in Delving into the bioecology of Culex interrogator Dyar & Knab, 1906 (Diptera: Culicidae) in Camagüey, Cuba
Figure 1. Some of the breeding sites with presence of Culex interrogator in Camagüey, Cuba, in 2022. A. Ditch. B. Ground-level tank. C. Sewage pit. D. Lagoon. E. Water trough. F. Tree hole. / Figura 1. Algunos de los sitios de cría con presencia de Culex interrogator en Camagüey, Cuba, en 2022. A. Zanja. B. Tanque bajo. C. Pozo de aguas negras. D. Laguna. E. Bebedero. F. Hueco de árbol.
Fig. 4 in Molecular and physiological characterization of the chitin synthase B gene isolated from CUlex pipieNS palleNS (Diptera: Culicidae)
Fig. 4 RNA interference (RNAi) of CpCHSB in third-instar larvae (n = 200). a Expression levels of CpCHSB at 72 h after injecting siCHSB assessed by RT-qPCR. b siCHSB injection into third-instar reduces body length in fourth-instar larvae, as well as midgut length (c). d Percentage of pupation (x-axis) after egg-hatching. e Comparison of wing length in wild type (WT), negative control (NC) and siCHSB adults. f Number of follicles per ovary and the number of eggs per female mosquito (g) after injecting (n = 50) siCHSB. All surviving individuals were used for measurements, and results are shown as the mean ± SE (Student's t-tests: **P <0.01, ***P <0.001)
Climate adaptation and genetic differentiation in the mosquito species <em>Culex tarsalis</em>
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Data from: Transinfection of Wolbachia wAlbB into Culex quinquefasciatus mosquitoes does not alter vector competence for Hawaiian avian malaria (Plasmodium relictum GRW4)
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Data from: Effective population size of Culex quinquefasciatus under insecticide-based vector management and following Hurricane Harvey in Harris County, Texas
<div> <em>Culex quinquefasciatus</em> is mosquito species of significant public health importance due to its ability to transmit multiple pathogens that can cause mosquito-borne diseases, such as West Nile fever and St. Louis encephalitis. In Harris County, Texas, <em>Cx. quinquefasciatus</em> is a common vector species and is subjected to insecticide-based management by the Harris County Public Health Department. However, insecticide resistance in mosquitoes has increased rapidly worldwide and raises concerns about maintaining the effectiveness of vector control approaches. This concern is highly relevant in Texas, with its humid subtropical climate along the Gulf Coast that provides suitable habitat for <em>Cx. quinquefasciatus</em> and other mosquito species that are known disease vectors. Therefore, there is an urgent and ongoing need to monitor the effectiveness of current vector control programs. In this study, we evaluated the impact of vector control approaches by estimating the effective population size of <em>Cx. quinquefasciatus</em> in Harris County. We applied Approximate Bayesian Computation to microsatellite data to estimate effective population size. We collected <em>Cx. quinquefasciatus</em> samples from two mosquito control operation areas, 415 and 802, during routine vector monitoring in 2016 and 2017. No county mosquito control operations were applied at area 415 in 2016 and 2017, whereas extensive adulticide spraying operations were in effect at area 802 during the summer of 2016. We collected data for eighteen microsatellite markers for 713 and 723 mosquitoes at eight timepoints from 2016 to 2017 in areas 415 and 802, respectively. We also investigated the impact of Hurricane Harvey's landfall in the Houston area in August of 2017 on <em>Cx. quinquefasciatus</em> population fluctuation. Although we did not detect significant effects of vector control interventions, we found considerable influences of the winter season and a major hurricane on the effective population size of <em>Cx. quinquefasciatus</em>. The fluctuations in effective population size in both areas showed a significant seasonal pattern. Additionally, the significant population expansion following Hurricane Harvey in 2017 supports the necessity for post-hurricane vector-control interventions.</div>
Wing geometric morphometrics and COI barcoding of Culex pipiens subgroup in the Republic of Korea
<p>Two members of the <em>Culex pipiens</em> subgroup, <em>Culex pallens</em> and <em>Culex pipiens</em> f. <em>molestus</em>, are known to occur in the Republic of Korea (ROK). These species exhibit morphologically similar features and are challenging to distinguish below the species level. Therefore, this study utilized wing geometric morphometrics (GM) on the right wing of the <em>Culex pipiens</em> subgroup, alongside sequencing of the cytochrome <em>c</em> oxidase subunit I (<em>COI</em>) region. Mosquitoes were collected from 11 locations between June and October to minimize regional and seasonal variations. Additionally, <em>Culex pipiens</em> f. <em>pipiens</em>, which is not native to the ROK, was included in the analysis. <em>Culex tritaeniorhynchus</em>, <em>Aedes albopictus</em>, and <em>Anopheles sinensis</em>, the primary vectors in the ROK, were used as outgroups for comparison. All three taxa within the <em>Culex pipiens</em> subgroup could be identified with an 82.4%–97.0% accuracy using GM. However, a comparison of the <em>COI</em> regions of the <em>Culex pipiens</em> subgroup revealed no clear differences between the taxa. These data can be used for accurate identification, contributing to effective mosquito control, in addition to providing a foundation for evolutionary and ecological studies on wing shape differences.</p>
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OpenNeuro
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