Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 55 for “"blood-feeding"”.
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Blood-Feeding Patterns of Eastern Equine Encephalitis Virus Bridge Vectors at Viral Foci in Southeast Georgia
… as incidental hosts. Mosquitoes with catholic feeding behaviors (e.g., <em>Coquillettidia perturbans </em>and <em>Culex erraticus)</em> are responsible for transmission of EEEV to non-avian vertebrates. Prior studies have demonstrated that EEEV is not maintained in overwintering mosquitoes or …
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Towards the Characterization of Enzymes Involved in the Metabolism of Tyrosine and Tyrosine Derivatives
… were expressed in the head before and after blood feeding, suggesting their potential role in neurotransmission inactivation. Down-regulation of these genes after blood feeding suggests that blood feeding or factors related to blood feeding impact on the regulation of these genes. Kinetic …
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The Genetic and Neural Basis of Sexual Dimorphism in Mosquito Behavior
… evolved to hunt humans in order to feed on their blood. In striking contrast, male mosquitoes have no drive to seek hosts or drink their blood. Through the act of blood-feeding, only female mosquitoes can transmit pathogens that cause deadly diseases like dengue, chikungunya, and Zika. The genetic …
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Dynamics of La Crosse virus: Surveillance, Control and Effect on Vector Behavior
… mosquitoes. Serotonin is known to affect blood-feeding and dopamine affects host-seeking. Serotonin levels were significantly lower in LACV-infected mosquitoes but dopamine levels were unaffected by virus. A previous study found that LACV infection caused an alteration in mosquito …
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Effects of Fluid Properties on the Dynamics of Mosquitoes' Ingestion Pumps
This thesis explores the feeding structures of insects, which have evolved over millennia to utilize a variety of dietary sources. It examines the mouthparts of insects feeding on plants, other bugs, or vertebrate blood, analyzing how these structures influence or limit their diet. Focusing …
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Underlying mechanisms of juvenile hormone (JH) and its analog in regulating mosquito reproduction
… sites at multiple time points before and after a blood meal. In addition to known JH-regulated genes, we identified the binding of Kr-h1 to several genes that are controlled by the insect steroid hormone 20-hydroxyecdysone (20E). Kr-h1 seemed to have different roles in regulating the …
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Functional study of miRNA-mRNA interactions in malaria mosquito An. gambiae
… distinct physiological features adapting to blood feeding for successful reproduction. The disease pathogens that are transmitted by mosquitoes have evolved to take advantages of the indispensable blood feedings to complete their transmission cycles and to survive attacks from the mosquito's …
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Patterns of avian haemosporidia in birds within the greater Cape Town area
… changing between the vector as definitive host (blood-feeding arthropod) and bird as intermediate host. Avian haemosporidian parasites belong to the order Haemospororida, to which the families Haemoprotidae, Plasmodiidae, Garniidae and Leucocytozoidae belong, consisting of the genera …
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An Insight Into the Microbial Diversity and Expression of Cysteine Protease Inhibitors (Cystatin) in <i>Rickettsia parkeri</i> Infected <i>Amblyomma maculatum</i>
… expression in <em>A. maculatum</em>across the blood meal cycle and our finding suggested their importance during blood feeding. Further, we saw <em>R. parkeri</em> differentially regulates gene expressions of cystatins in <em>A. maculatum,</em> suggesting a possible role of cystatins in <em>R. …
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Immunity Against Malaria: an Atlas of the Mosquito Cellular Immune System at Single Cell Resolution
… the insect equivalent to vertebrate’s white blood cells, circulating in the hemolymph within the insects’ body cavity. Yet, hemocyte biology is largely unknown, mainly due to the low number and fragility of mosquito immune cells. Here we dissect the Anopheles immune system under baseline and …
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Two Odorant-Binding Protein Genes in Mosquitoes: Comparative Genomics, Expression, and Function
… relevant to olfactory tissue development and blood-feeding. The expression profiles of these genes were examined in detail in the Asian malaria mosquito An. stephensi. Obp1 and Obp7 transcripts were significantly higher in females than male mosquitoes and they were predominantly found in the …
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Mosquitos Associated with Equine West Nile Virus Cases in Southeastern Georgia
… No virus positive mosquitoes were detected. Blood meals from 377 engorged specimens caught at these sites were identified as of mammalian, avian, or reptile/amphibian origin using serological methods. Overall, results suggest that Culex nigripalpus was the most likely vector of West Nile …
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La Crosse Virus in Southwestern Virginia: Role of Exotic Mosquito Species and Effect of Virus Infection on Feeding
… preferences, effect of virus infection on blood-feeding behavior, and compare the efficacy of various methods to determine minimum infection rates of vectors. In laboratory studies of oviposition preference, only Ae. japonicus demonstrated a preference when presented with preexisting eggs. …
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Describing the Ionoregulatory Changes that Underlie Cold Acclimation in Drosophila Melanogaster
… findings on the effects of acclimation, sex, and blood-feeding on the cold tolerance of the arboviral disease vector mosquito, A. aegypti.
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From Microarrays to Behavior: Genes Controlled by Feeding State in Mosquitoes and Flies
… tract and by adipose tissue, and reach feeding centers in the brain, where they stimulate the release of peptides that modulate feeding behavior (Benarroch, 2010; Berthoud, 2008). Although many of these neuronal populations have been identified in rodent models, the neural circuitry …
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Factors affecting the protective effect provided by sand fly saliva immunization on the outcome of Leishmania infection
… vector - female sand flies during the process of blood feeding. Preexposure to sand fly saliva prior to Leishmania infection affects the host immune system, leading to possible establishment of protective effect on the disease outcome. This effect is based on the delayed type hypersensitivity …
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A molecular characterization of agonists that bind to Hco-UNC-49, a GABA-gated chloride channel from Haemonchus contortus
Haemonchus contortus is a blood feeding parasitic nematode infecting ruminants causing anemia and poor health at great economic cost. The ability to pharmaceutically control infection has been challenged by the rapid development and spread of drug resistance. The discovery of new targets is …
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Analysis of the feeding behaviour of the mosquito Culex pipiens L. (Diptera: Culicidae) in relation to West Nile virus
… literature review describe the life cycle and blood feeding behaviours ofmosquitoes so that baseline data ofmosquito biology are established. In addition to explaining how and why a mosquito blood feeds, the section on "Blood Meal Analysis" describes the different methods for determining the …
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An examination of interacting residues in the GABA-gated ion channel UNC-49 within the parasitic nematode Haemonchus contortus
Haemonchus contortus is a blood-feeding parasitic nematode that infects ruminant animals around the world, including those with significant economic importance such as cattle, sheep, and goats. UNC-49 is a GABA-gated chloride channel found to be exclusive to nematodes which could be a viable future …
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Phenology of a Relict Population Of The Pitcher Plant Mosquito, Wyeomyia Smithii (Diptera: Culicidae), in Tattnall Co., Ga
… to effect the abundance of larvae (P = 0.093). Blood feeding occurred during both 2012 and 2013 but became more prevalent later in the summer each year, with an increase in frequency of blood meals in 2013 compared to 2012. Stasis (diapause) began in November and terminated in March. Mortality …
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