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Showing 1 to 20 of 53 for “"Rickettsia"”.
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SURVEY OF Rickettsia spp. IN TICKS IN NACOGDOCHES COUNTY, TEXAS
<p><em>Rickettsia parkeri </em>is an obligate intracellular pathogenic bacterium that is commonly transmitted by the Gulf Coast tick, <em>Amblyomma maculatum</em>. <em>Rickettsia parkeri</em> is the causative agent of <em>Rickettsia parkeri </em>rickettsiosis, which is a disease characterized by …
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Arthropod and vertebrate determinants for horizontal transmission of Rickettsia felis
Rickettsia felis is a gram-negative bacterium predominantly described in the cat flea, Ctenocephalides felis. Since first described in 1990 in a commercial cat flea colony in the United States, R. felis has been detected in numerous arthropod species in 28 countries around the world. Additionally, …
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Role of c-Cbl in Invasion of Mammalian Cells by Rickettsia Conorii
[SPECIFIC AIMS] Rickettsia conorii is an intracellular bacterium that causes Mediterranean spotted fever. R. conorii is transmitted from ticks to humans and invades vascular endothelial cells. A recent publication (Martinez et al., 2005) has identified Ku70 as a host cell receptor that binds to …
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Rickettsia prowazekii and its ‘Junk DNA’: The Identification and Characterization of Small RNAs
… Mountain spotted fever and epidemic typhus, Rickettsia are obligate intracellular Gram-negative pathogenic bacteria. Genomic sequencing determined that ~24% of the Rickettsia prowazekii genome was noncoding DNA due to genomic reduction. Regions of bacterial noncoding DNA were found to encode …
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Isolation and Immunochemical Characterization of Soluble Anaplasma Marginale Antigen (Rickettsia, Hemoparasite, Disease, Elisa)
The present work was designed to characterize and isolate a soluble A. marginale (noncaudal Florida isolate) antigen derived from culture supernatants and infected erythrocytes. Two immunoassays, double immunodiffusion and enzyme-linked immunosorbent assay were adapted for monitoring the presence …
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Molecular Detection and Characterization of Rickettsia sp. in Hard Ticks Collected in Nacogdoches, Texas
… Texas, to test for the presence of <em>Rickettsia </em>sp. 47 ticks were collected from vegetation by flagging and their species, sex, and developmental stage were determined using available keys. Individual ticks were processed for nucleic acid extraction and molecular detection of …
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Interação funcional, expressão de genes e filogenia entre proteínas de membrana de Rickettsia spp. e carrapatos
… entre carrapatos e espécies de Rickettsia endo simbiônticas é mediada por interações e mecanismos moleculares, ocorrendo através de genes e proteínas potencialmente codificadas nos genomas de ambos os organismos. Tratando-se de uma relação em nível molecular, buscamos predizer as …
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The tick response to Rickettsial dissemination during typical and atypical Rickettsial infection
… disease vectors for spotted fever group (SFG) Rickettsia which are obligate intracellular bacteria belonging to the genus Rickettsia. In nature, ticks maintain the infection of SFG Rickettsia via vertical and horizontal transmission. However, the prevalence of rickettsial transmission is …
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Identification and Characterization of a Relish-type NF-kB, DvRelish in Dermacentor variabilis, the American Dog Tick
… and non-pathogenic Spotted fever group (SFG) Rickettsia are maintained and transmitted by ticks with specific hard tick-Rickettsia pairings evident in nature. The pathogenic SFG Rickettsia rickettsii is transmitted by the hard tick Dermacentor variabilis. In response to infection, D. …
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Papel de las aves en la dispersión de garrapatas y microorganismos que vehiculan
… of bacteria (Anaplasma/Ehrlichia, Borrelia, Rickettsia and Spiroplasma) and viruses (Crimean-Congo hemorrhagic fever virus, Flavivirus, Phlebovirus, Coltivirus and Orbivirus) using molecular biology techniques. In these studies, ticks belonging to five species (Haemaphysalis punctata, …
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Determination of the Presence of <i>Rickettsia</i> Spp. and <i>Borrelia</i> Spp. Carried by Tortoise Ticks from Madagascar
… chain reaction assay for the presence of <em>Rickettsia</em> spp. and Borrelia spp., amplifying the rickettsial 17 kDA and <em>Borrelia</em> 16S rRNA gene, respectively. Those positive for either pathogen were analyzed to determine the specific species via end-point PCR and sequencing. One …
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An observational study of ticks on the 30 Acre Lake Trail at Turnbull National Wildlife Refuge
… in past studies and the only known site of Rickettsia rickettsii pathogen isolated from ticks on the Turnbull National Wildlife Refuge (TNWR) to date. I hypothesize that there is a risk of infection of Rickettsia at this location, given the large tick density as well as the large density of …
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High resolution modeling of tick density and detection of Rickettsia spp. in Dermacentor spp. ticks at Turnbull National Wildlife Refuge, WA
… of pathogens. One such pathogen is the bacteria Rickettsia rickettsii, which causes Rocky Mountain spotted fever. The detection of this bacterium in ticks at Turnbull National Wildlife Refuge (TNWR) indicates a potential risk to human health. In order to follow up on this discovery, we had two …
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Rede de interação proteína-proteína na relação entre Rickettsia amblyommatis e células do intestino e ovário de Amblyomma sculptum (Berlese, 1888)
… de proteínas codificadas do genoma da bactéria Rickettsia amblyommatis e do carrapato Ixodes scapularis. Com o alinhamento das sequências proteicas identificadas, conforme preconizado por diferentes bancos de interações (PSIMAP, iPfam, STRING e PEIMAP), obteve-se uma rede consenso após a …
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Identification of protective rickettsial antigens for vaccine development
The genus Rickettsia contains some of the most lethal pathogens known to man, including Rickettsia prowazekii, a select agent that could be used as a biological weapon. Although Rickettsia spp. cause important diseases of public health importance and there is a need to develop countermeasures for …
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Rendimiento de diferentes métodos de PCR en el diagnóstico molecular de las rickettsiosis humanas transmitidas por garrapatas
… y producidas por distintas especies del género Rickettsia. El diagnóstico de este tipo de infecciones es fundamentalmente clínico, si bien hacen falta pruebas confirmatorias de laboratorio. El cultivo celular, las técnicas serológicas y la amplificación mediante PCR de diversos fragmentos de …
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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>
… United States. It is a competent vector of <em>Rickettsia parkeri</em>, an etiological agent of a human rickettsiosis. In this study, we investigated the spotted fever group of rickettsial diversity in <em>A. maculatum</em> based on rickettsial <em>ompA</em> gene PCR. Our results showed <em>A. …
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Determining the Prevalence and Distribution of Tick-Borne Pathogens in Southeastern Virginia and Exploring the Transmission Dynamics of Rickettsia Parkeri in Amblyomma Maculatum
… focus on emerging pathogens, including Rickettsia parkeri and Ehrlichia chaffeensis.</p> <p>The second aim of this research was to determine the transmission dynamics of Rickettsia parkeri within its vector, Amblyomma maculatum. Although some rickettsiae are transovarially transmitted in …
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