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https://www.readbyqxmd.com/read/28321982/susceptibility-of-insecticide-resistant-bed-bugs-cimex-lectularius-to-infection-by-fungal-biopesticide
#1
Alexis M Barbarin, Giovani S Bellicanta, Jason A Osborne, Coby Schal, Nina E Jenkins
BACKGROUND: Bed bugs are a public health concern, and their incidence is increasing worldwide. Bed bug infestations are notoriously difficult to eradicate, further exacerbated by widespread resistance to pyrethroid and neonicotinoid insecticides. This study evaluated the efficacy of the newly developed fungal biopesticide, Aprehend™, containing Beauveria bassiana, against insecticide-resistant bed bugs. RESULTS: Overall mortality for the Harold Harlan (insecticide-susceptible) strain was high (98-100%) following exposure to Aprehend™ or Suspend SC (deltamethrin)...
March 20, 2017: Pest Management Science
https://www.readbyqxmd.com/read/28217039/desiccant-dust-and-the-use-of-co2-gas-as-a-mobility-stimulant-for-bed-bugs-a-potential-control-solution
#2
Anders Aak, Espen Roligheten, Bjørn Arne Rukke, Tone Birkemoe
The common bed bug (Cimex lectularius, Hemiptera; Cimicidae) infests homes and service industries, and the number of infestations has greatly increased over the past 20 years. At present, no cost-effective control methods are available, and eradication programs are expensive and laborious. We investigated the control potential of desiccant dust in combination with CO2 as a bed bug activity stimulant. An initial experiment with two desiccant dusts was followed by arena studies with varying doses, available hiding places and the presence or absence of host signals...
2017: Journal of Pest Science
https://www.readbyqxmd.com/read/28179037/analysis-of-bed-bug-cimex-lectularius-introductions-into-an-academic-medical-center
#3
Johnathan Michael Sheele, Erika Barrett, Obada Farhan, Nathan Morris
No abstract text is available yet for this article.
February 9, 2017: Infection Control and Hospital Epidemiology
https://www.readbyqxmd.com/read/28167332/chemoreception-to-aggregation-pheromones-in-the-common-bed-bug-cimex-lectularius
#4
Feng Liu, Caixing Xiong, Nannan Liu
The common bed bug, Cimex lectularius, is an obligate blood-feeding insect that is resurgent worldwide, posing a threat to human beings through its biting nuisance and disease transmission. Bed bug aggregation pheromone is considered a very promising attractant for use in the monitoring and management of bed bugs, but as yet little is known regarding the sensory physiology of bed bugs related to this pheromone. This study examined how the individual components of aggregation pheromone are perceived by the olfactory receptor neurons (ORNs) housed in different types of olfactory sensilla in bed bugs and the molecular basis for the ORNs' responses to the aggregation pheromone...
March 2017: Insect Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28115498/effects-of-different-surfaces-and-insecticide-carriers-on-residual-insecticide-bioassays-against-bed-bugs-cimex-spp-hemiptera-cimicidae
#5
Kai Dang, G Veera Singham, Stephen L Doggett, David G Lilly, Chow-Yang Lee
The performance of five insecticides (bendiocarb, deltamethrin, DDT, malathion, and imidacloprid) using three application methods (oil-based insecticide films on filter paper, and acetone-based insecticide deposits on two substrates: filter paper and glass) was assessed against a susceptible strain of Cimex lectularius (L.) and two resistant strains of Cimex hemipterus (F.). Substrate type significantly affected (P < 0.05) the insecticide knockdown response of the susceptible strain in acetone-based insecticide bioassays, with longer survival time on filter paper than on the glass surface...
January 22, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28077253/a-survey-of-patients-with-bed-bugs-in-the-emergency-department
#6
Johnathan M Sheele, Stephanie Gaines, Nicholas Maurer, Katirina Coppolino, Jennifer S Li, Amy Pound, Jeffrey H Luk, Ed Mandac
Bed bugs are one of the most important human ectoparasites in the United States, and a growing problem in the emergency department. We evaluated 40 emergency department (ED) patients found with a bed bug. The data show that ED patients with bed bugs are statistically more likely to be male, older, more likely to be admitted to the hospital, have higher triage emergency severity index (ESI) scores, and arrive by ambulance than the general ED patient population (p<0.05). On average bed bugs were found 108min after a patient arrived to the ED, after 35% of subjects had already received a blood draw, and after 23% had already received a radiology study; putting other ED patients and staff at risk for acquiring the infestation...
January 3, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28075502/antibody-and-cytokine-levels-in-humans-fed-on-by-the-common-bed-bug-cimex-lectularius-l
#7
Johnathan M Sheele, Gale E Ridge, Katirina Coppolino, Tracey Bonfield, Andrew B Young, Stephanie L Gaines, Thomas S McCormick
Little is known about cimicosis, the resultant dermal reaction from feeding activity by the common bed bug, Cimex lectularius L. We fed C. lectularius on human study subjects four times over four weeks, measured serum cytokine and antibody levels, and subjects recorded any cimicosis. The average time for subjects to develop cimicosis decreased with each feeding from 8.4, to 2.1, 1.5, and 1.3 days, respectively. There were no significant changes in total IgG, IgG1, IgG2, IgG4, or IgE levels between the first and fourth bed bug feedings, but there was a significant decrease in total IgG3 levels (p < 0...
January 11, 2017: Parasite Immunology
https://www.readbyqxmd.com/read/27991708/mortality-fecundity-and-development-among-bed-bugs-cimex-lectularius-exposed-to-prolonged-intermediate-cold-stress
#8
Bjørn A Rukke, Morten Hage, Anders Aak
BACKGROUND: Bed bugs (Cimex lectularius L.) have returned as a nuisance pest worldwide. Their ability to withstand different types of environmental stress should be explored to potentially increase the efficiency of control methods. RESULTS: Immediate- and long-term effects of exposure to 0 °C to -10 °C for 1, 2, and 3 weeks are reported. Fifth instar nymphs and adults were exposed to constant or fluctuating temperatures. Increased cold and extended time yielded higher mortality; nymphs were more resilient than adults were at the shorter durations of exposure...
December 19, 2016: Pest Management Science
https://www.readbyqxmd.com/read/27986941/egg-hatch-rate-and-nymphal-survival-of-the-bed-bug-hemiptera-cimicidae-after-exposure-to-insecticide-sprays
#9
K R Hinson, E P Benson, P A Zungoli, W C Bridges, B R Ellis
Few studies have addressed the efficacy of insecticides used against eggs and first-instar nymphs of the bed bug, Cimex lectularius L. (Hemiptera: Cimicidae). Insect eggs are often resistant to insecticides; therefore, information on which products are effective is important. We evaluated the efficacy of four commonly used insecticide sprays applied directly to bed bug eggs. We also evaluated the efficacy of these insecticides to first-instar nymphs exposed to residuals resulting from directly spraying eggs...
December 2016: Journal of Economic Entomology
https://www.readbyqxmd.com/read/27941664/evidence-of-tolerance-to-silica-based-desiccant-dusts-in-a-pyrethroid-resistant-strain-of-cimex-lectularius-hemiptera-cimicidae
#10
David G Lilly, Cameron E Webb, Stephen L Doggett
Insecticide resistance in bed bugs (Cimex lectularius and Cimex hemipterus) has become widespread, which has necessitated the development of new IPM (Integrated Pest Management) strategies and products for the eradication of infestations. Two promising options are the diatomaceous earth and silica gel-based desiccant dusts, both of which induce dehydration and eventual death upon bed bugs exposed to these products. However, the impact of underlying mechanisms that confer resistance to insecticides, such as cuticle thickening, on the performance of these dusts has yet to be determined...
December 9, 2016: Insects
https://www.readbyqxmd.com/read/27914935/laboratory-and-field-evaluation-of-brown-dog-tick-behavioral-responses-to-potential-semiochemicals
#11
Lucas P Carnohan, Phillip E Kaufman, Sandra A Allan, Salvador A Gezan, Emma N I Weeks
The brown dog tick, Rhipicephalus sanguineus sensu lato (Parasitiformis: Ixodidae), is an ectoparasite of dogs that can be found worldwide. This tick poses unique difficulties in management because it can complete its entire life cycle indoors and has demonstrated acaricide resistance. The ability to monitor for tick presence and abundance is necessary for developing effective control programs. As such, an evaluation of adult brown dog tick behavioral responses to 16 potential semiochemicals was undertaken using Y-tube and straight-tube olfactometers...
November 9, 2016: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/27830371/discrimination-between-lineage-specific-shelters-by-bat-and-human-associated-bed-bugs-does-not-constitute-a-stable-reproductive-barrier
#12
Ondřej Balvín, Tomáš Bartonička, Kateřina Pilařová, Zachary DeVries, Coby Schal
The common bed bug Cimex lectularius, has been recently shown to constitute two host races, which are likely in the course of incipient speciation. The human-associated lineage splits from the ancestral bat-associated species deep in the history of modern humans, likely even prior to the Neolithic Period and establishment of the first permanent human settlements. Hybridization experiments between these two lineages show that post-mating reproductive barriers are incomplete due to local variation. As mating takes place in off-host refugia marked by aggregation semiochemicals, the present investigation tested the hypothesis that bed bugs use these semiochemicals to differentiate between refugia marked by bat- and human-associated bed bugs; this would constitute a pre-copulation isolation mechanism...
January 2017: Parasitology Research
https://www.readbyqxmd.com/read/27811536/cimex-lectularius-bed-bugs-recognition-management-and-eradication
#13
(no author information available yet)
No abstract text is available yet for this article.
November 2016: Pediatric Emergency Care
https://www.readbyqxmd.com/read/27811535/cimex-lectularius-bed-bugs-recognition-management-and-eradication
#14
Kathryn S McMenaman, Marianne Gausche-Hill
Reports of bed bug infestations in major cities in the United States and abroad have been in the public press. Physicians and other clinicians who care for children need to be able to recognize bed bug bites and understand the social, psychological, and medical implications that this diagnosis will have on patients and their families. In this article, a case presentation serves to guide discussion regarding establishing the diagnosis, differential diagnosis, and the management of bed bug bites and their complications...
November 2016: Pediatric Emergency Care
https://www.readbyqxmd.com/read/27809930/sleeping-habits-affect-access-to-host-by-chagas-disease-vector-triatoma-dimidiata
#15
Etienne Waleckx, Rafael Pasos-Alquicira, María Jesús Ramírez-Sierra, Eric Dumonteil
BACKGROUND: Chagas disease, caused by the parasite Trypanosoma cruzi, is mainly transmitted by blood-sucking bugs called triatomines. In the Yucatán Peninsula, Mexico, the main vector of T. cruzi is Triatoma dimidiata. While this species may colonize houses in other regions, it is mostly intrusive in Yucatán: it generally lives in sylvan and peridomestic areas, and frequently enters inside homes, likely attracted by potential vertebrate hosts, without establishing colonies. Bugs collected inside homes have a low nutritional status, suggesting that they cannot efficiently feed inside these houses...
November 3, 2016: Parasites & Vectors
https://www.readbyqxmd.com/read/27775392/modeling-the-spread-of-bed-bug-infestation-and-optimal-resource-allocation-for-disinfestation
#16
Ali Gharouni, Lin Wang
A patch-structured multigroup-like $SIS$ epidemiological model is proposed to study the spread of the common bed bug infestation. It is shown that the model exhibits global threshold dynamics with the basic reproduction number as the threshold parameter. Costs associated with the disinfestation process are incorporated into setting up the optimization problems. Procedures are proposed and simulated for finding optimal resource allocation strategies to achieve the infestation free state. Our analysis and simulations provide useful insights on how to efficiently distribute the available exterminators among the infested patches for optimal disinfestation management...
October 1, 2016: Mathematical Biosciences and Engineering: MBE
https://www.readbyqxmd.com/read/27766740/comparison-of-ingestion-and-topical-application-of-insecticides-against-the-common-bed-bug-cimex-lectularius-hemiptera-cimicidae
#17
Angela Sierras, Coby Schal
BACKGROUND: The global prevalence of Cimex lectularius infestations has challenged current intervention efforts, as pyrethroid resistance has become ubiquitous, availability of labeled insecticides for bed bugs is limited, and non-chemical treatment options, such as heat, are often unaffordable. We evaluated representative insecticides toward the goal of developing a novel, ingestible liquid bait for hematophagous arthropods. RESULTS: LC50 values were estimated for adult males and first instar nymphs of an insecticide-susceptible strain for abamectin, clothianidin, fipronil and indoxacarb, after ingestion from an artificial feeder...
March 2017: Pest Management Science
https://www.readbyqxmd.com/read/27762340/juvenile-hormone-regulation-of-female-reproduction-in-the-common-bed-bug-cimex-lectularius
#18
Hemant Gujar, Subba Reddy Palli
To begin studies on reproduction in common bed bug, Cimex lectularius, we identified three genes coding for vitellogenin (Vg, a protein required for the reproductive success of insects) and studied their hormonal regulation. RNA interference studied showed that expression of Vg3 gene in the adult females is a prerequisite for successful completion of embryogenesis in the eggs laid by them. Juvenile hormone (JH) receptor, Methoprene-tolerant (Met), steroid receptor coactivator (SRC) and GATAa but not ecdysone receptor (EcR) or its partner, ultraspiracle (USP) are required for expression of Vg genes...
October 20, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27733453/a-linkage-map-and-qtl-analysis-for-pyrethroid-resistance-in-the-bed-bug-cimex-lectularius
#19
Toby Fountain, Mark Ravinet, Richard Naylor, Klaus Reinhardt, Roger K Butlin
The rapid evolution of insecticide resistance remains one of the biggest challenges in the control of medically and economically important pests. Insects have evolved a diverse range of mechanisms to reduce the efficacy of the commonly used classes of insecticides, and finding the genetic basis of resistance is a major aid to management. In a previously unstudied population, we performed an F2 resistance mapping cross for the common bed bug, Cimex lectularius, for which insecticide resistance is increasingly widespread...
December 7, 2016: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/27688050/feel-the-heat-activation-orientation-and-feeding-responses-of-bed-bugs-to-targets-at-different-temperatures
#20
Zachary C DeVries, Russell Mick, Coby Schal
Host location in bed bugs is poorly understood. Of the primary host-associated cues known to attract bed bugs - CO2, odors, heat - heat has received little attention as an independent stimulus. We evaluated the effects of target temperatures ranging from 23 to 48°C on bed bug activation, orientation and feeding. Activation and orientation responses were assessed using a heated target in a circular arena. All targets heated above ambient temperature activated bed bugs (initiated movement) and elicited oriented movement toward the target, with higher temperatures generally resulting in faster activation and orientation...
December 1, 2016: Journal of Experimental Biology
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