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23 results for “Cimex lectularius”
Figure 4 in Morphological studies of Cimex lectularius Linnaeus, 1758 (Hemiptera: Cimicidae)
Figure 4. Cimex lectularius ventral face, terminal segments of 5th instar nymphs. A. Female nymph. B. Male nymph. C. Genital opening in female. D. Male genitalia. E. Schematic drawing double genital opening/spermalege in adult female of Cimex lectularius. F. Optical microscopy image. V: 5th segment, VIII: 8th segment, IX: 9th segment, cd: central depression, sj: 8th and 9th segments junction in the central portion, ca: circumscribed area located in the central and posterior portion of the 8th segment, ss: sharp sensilla, bs: barbed sensilla / spiniform, op: oval pseudo-segment, go: genital opening, pg: pygophore, pa: paramere. / A. Ninfa hembra. B. Ninfa macho. C. Abertura genital en la hembra. D. Genitales masculinos. E. Dibujo esquemático de doble apertura genital/espermalejo en hembra adulta de Cimex lectularius. F. Imagen de microscopÍa óptica. V: segmento 5, VIII: segmento 8, IX: segmento 9, cd: depresión central, sj: unión de los segmentos 8 y 9 en la porción central, ca: área circunscrita ubicada en la porción central y posterior del segmento 8, ss: sensila afilada, bs: sensila barbada/espiniforme, op: pseudosegmento ovalado, go: abertura genital, pg: pigóforo, pa: parámero.
Fig. 1 in Polymerase chain reaction and gyrA nucleotide sequence analysis of Wolbachia endosymbionts (Rickettsiales: Anaplasmataceae) in various species of Culicidae, Cimex lectularius (Hemiptera: Cimicidae) and Dirofilaria immitis (Rhabditida: Onchocercidae)
Fig. 1. Phylogenetic tree based on Maximum Likelihood depicting the grouping of Wolbachia from various hosts based on analysis of the gyrA gene. The numerical value displayed on branches is the bootstrap value (1,000 replicates), and branches with values below 50% are collapsed. The tree illustrates that gyrA sequences distinguish Wolbachia subtypes based on host taxonomy, demonstrating that this gene may contribute to Wolbachia strain typing projects and future phylogenetic analysis.
The puncture mechanics: an example from the bed bug Cimex lectularius showing traumatic insemination using the paramere
<p>Cimicidae are well-known for traumatic insemination, and males pierce females with their parameres and transfer sperm through them. The shape of parameres is relatively stable in the family, but in some genera the paramere is elongated, appearing less resistant against lateral deflection. To understand the mechanical limitations of the paramere, we studied its penetration mechanics of the common bed bug, <em>Cimex lectularius</em>. We examined the postabdominal morphology, paramere geometry, and material properties and conducted breaking stress experiments on the paramere under wet and dry conditions. Mechanical property gradients are present with the paramere tip as the stiffest region and the base as the most flexible one. These mechanical properties relate to the presence of Ca, Zn, and Si. The basal wing-shaped structure is flexible, enabling it to interlock with the anal region during mating. The paramere is slightly twisted; the tip region is circular in cross-section, and the geometry of the rest is rather complex. In the mechanical test, wet parameres mainly buckled, while dried parameres broke off. The level of structural failures depended on the directions from which the compression forces were applied. Structural, material, and mechanical strengthening mechanisms preventing the paramere from mechanical failure are discussed.</p>
Data for: SNPs detected in pool-seq data from resistant and susceptible Cimex lectularius populations
<p>In the last few years, the bed bug <em>Cimex lectularius</em> has been an increasing problem world-wide, mainly due to the development of insecticide resistance to pyrethroids. The characterization of resistance alleles is a prerequisite to improve surveillance and resistance management. To identify genomic variants associated with pyrethroid resistance in <em>Cimex lectularius</em>, we compared the genetic composition of two recent and resistant populations with that of two ancientsusceptible strains using a genome-wide pool-seq design. We identified a large 6 Mb "superlocus" showing particularly high genetic differentiation and association with the resistance phenotype. This superlocus contained several clustered resistance genes, andwas also characterized by a high density of structural variants (inversions, duplications). The possibility that this superlocus constitute a resistance "supergene" that evolved after the clustering of alleles adapted to insecticide and after reduction in recombination is discussed.</p>
Data for: SNPs detected in pool-seq data from resistant and susceptible Cimex lectularius populations
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The puncture mechanics: an example from the bed bug Cimex lectularius showing traumatic insemination using the paramere
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Data from: A 454 survey reveals the community composition and core microbiome of the common bed bug (Cimex lectularius) across an urban landscape
Elucidating the spatial dynamic and core constituents of the microbial communities found in association with arthropod hosts is of crucial importance for insects that may vector human or agricultural pathogens. The hematophagous Cimex lectularius (Hemiptera: Cimicidae), known as the human bed bug, has made a recent resurgence in North America, as well as worldwide, potentially owing to increased travel, climate change and resistance to insecticides. A comprehensive survey of the bed bug microbiome has not been performed to date, nor has an assessment of the spatial dynamics of its microbiome. Here we present a survey of internal and external bed bug microbial communities by amplifying the V4–V6 hypervariable region of the 16S rDNA gene region followed by 454 Titanium sequencing using 31 individuals from eight distinct collection locations obtained from residences in Cincinnati, OH. Across all samples, 97% of the microbial community is made up of two dominant OTUs, previously identified as the α-proteobacterium Wolbachia and an unnamed γ-proteobacterium from the Enterobacteriaceae. Microbial communities varied among host locations for measures of community diversity and exhibited structure according to collection location. This broad survey represents the most in-depth assessment, to date, of the microbes that associate with bed bugs.
FIGURES 1–6 in Bat-parasitic Cimex species (Hemiptera: Cimicidae) on the Balkan Peninsula, with zoogeographical remarks on Cimex lectularius Linnaeus
FIGURES 1–6. Cimex emarginatus nov. sp. 1.—head and pronotum (scale bare, 1mm); 2.—bristles at sides of pronotum (scale bare, 0,1mm); 3.—bristles at dorsal side of abdomen (scale bare, 0,1mm); 4.—paragenital sinus (scale bare, 0,1mm); 5.—bristles of paragenital sinus (scale bare, 0,1mm); 6.—the end of abdomen of females (scale bare, 0,1mm)..
Attachment force (mN) of bed bugs Cimex lectularius males on Perspex (PMMA) in relation to surface roughness and wettability
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Data from: A linkage map and QTL analysis for pyrethroid resistance in the bed bug Cimex lectularius
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Data from: Host association drives significant genetic divergence in the bed bug, Cimex lectularius
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Data from: A 454 survey reveals the community composition and core microbiome of the common bed bug (Cimex lectularius) across an urban landscape
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Data from: Double cuticle barrier in two global pests, the whitefly Trialeurodes vaporariorum and the bedbug Cimex lectularius
The integument protects the organism against penetration of xenobiotics and water that would potentially interfere with homeostasis. In insects that play key roles in a variety of agricultural and ecological habitats, this inward barrier has barely been investigated. In order to advance knowledge in this field, we studied integumental barrier (cuticle) permeability in the two global pests Trialeurodes vaporariorum (greenhouse whitefly) and Cimex lectularius (bedbug), applying a simple dye-penetration assay. In agreement with our recent findings in Drosophila melanogaster, we show that the surface of these insects is regionalised. We also show that, in contrast to the single barrier in D. melanogaster, two barriers with distinct temperature-sensitive and lipid-based physico-chemical material properties act in parallel to protect these insects against penetration of hydrophilic molecules. These findings imply the existence of unexplored mechanisms by which the cuticle acts as a protective coat against the penetration of water and xenobiotics, including pollutants and insecticides.
FIGURE 7 in Bat-parasitic Cimex species (Hemiptera: Cimicidae) on the Balkan Peninsula, with zoogeographical remarks on Cimex lectularius Linnaeus
FIGURE 7. Cimex emarginatus nov. sp. —ectospermalege (scale bare, 0,1mm).
Figure 3. A in Morphological studies of Cimex lectularius Linnaeus, 1758 (Hemiptera: Cimicidae)
Figure 3. A. Adult female of Cimex lectularius full body; B. in detail. C. Adult male of Cimex lectularius full body; B. in detail. h: head; p: pronotum; ms-s: scutellum; hp: hemelytral pad; I, II, III, IV, V, VI, VII, VIII, IX: abdominal segments. /A. Hembra adulta de Cimex lectularius; B. en detalle. C. Macho adulto de Cimex lectularius; B. en detalle. h: cabeza; p: pronoto; ms-s: escutelo; hp: almohadilla hemielitral; I, II, III, IV, V, VI, VII, VIII, IX: segmentos abdominales.
Figure 2. A in Morphological studies of Cimex lectularius Linnaeus, 1758 (Hemiptera: Cimicidae)
Figure 2. A. Whole eggshell of Cimex lectularius. B. Eggshell in detail. C. Dorsal view of nymphs of first instar of Cimex lectularius; D. in detail. E. Second nymphal instar of Cimex lectularius; F. in detail. G. Third nymphal instar of Cimex lectularius; H. in detail. I. Fourth nymphal instar of Cimex lectularius; J. in detail. K. Fifth nymphal instar of Cimex lectularius; L. in detail. lf: lateral flattening, le: lap of egg, ec: exochorial cell; h: head; p: pronotum; ms: mesothoracic notum; mt: metathoracic notum; I, II, III, IV, V, VI, VII, VIII, IX: abdominal segments. / A. Cáscara de huevo entera de Cimex lectularius. B. Cáscara de huevo en detalle. C. Vista dorsal de ninfas del primer estadio de Cimex lectularius; D. en detalle. E. Segundo estadio ninfal de Cimex lectularius; F. en detalle. G. Tercer estadio ninfal de Cimex lectularius; H. en detalle. I. Cuarto estadio ninfal de Cimex lectularius; J. en detalle. K. Quinto estadio ninfal de Cimex lectularius; L. en detalle. lf: aplanamiento lateral, le: regazo de huevo, ec: celda exochorial; h: cabeza; p: pronoto; ms: noto mesotorácico; mt: noto metatorácico; I, II, III, IV, V, VI, VII, VIII, IX: segmentos
Figure 1. Cimex lectularius. A in Morphological studies of Cimex lectularius Linnaeus, 1758 (Hemiptera: Cimicidae)
Figure 1. Cimex lectularius. A. Colony at the collection site. B. Dorsal view of female. C. Dorsal view of male. / Cimex lectularius. A. Colonia en el sitio de colecta. B. Vista dorsal de la hembra. C. Vista dorsal del macho.
Data from: Double cuticle barrier in two global pests, the whitefly Trialeurodes vaporariorum and the bedbug Cimex lectularius
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Data from: Human-facilitated metapopulation dynamics in an emerging pest species, Cimex lectularius
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Data from: Outbreeding effects in an inbreeding insect, Cimex lectularius
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