Amblyomma Americanum
Mostrando 1-12 de 22 artigos, teses e dissertações.
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1. Projeções neuronais do órgão de Haller e sensila palpal até o singânglio de Amblyomma americanum
Resumo O presente estudo foi conduzido para elucidar a trajetória neuronal, entre as sensilas periféricas olfativas e gustativas e o singânglio, em uma espécie de carrapato Ixodidae. O tarso da primeira pata (nervos olfativos) e o quarto segmento palpal (nervos gustativos) de machos e fêmeas não alimentados de Amblyomma americanum foram excisados. Um t
Rev. Bras. Parasitol. Vet.. Publicado em: 14/06/2016
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2. Detection of Ehrlichia chaffeensis DNA in Amblyomma americanum Ticks in Connecticut and Rhode Island
Ehrlichia chaffeensis, the causative agent of human monocytic ehrlichiosis, is transmitted by Amblyomma americanum ticks, which are most abundant in the southern United States. Because serologic evidence suggests that residents of Connecticut are exposed to E. chaffeensis, A. americanum ticks were collected in Connecticut and Rhode Island for PCR analysis to
American Society for Microbiology.
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3. Prevalence of Ehrlichia ewingii in Amblyomma americanum in North Carolina
American Society for Microbiology.
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4. Evidence of Borrelia lonestari DNA in Amblyomma americanum (Acari: Ixodidae) Removed from Humans
We used a nested PCR with Borrelia flagellin gene (flaB) primers and DNA sequencing to determine if Borrelia lonestari was present in Amblyomma americanum ticks removed from military personnel and sent to the Tick-Borne Disease Laboratory of the U.S. Army Center for Health Promotion and Preventive Medicine. In our preliminary investigation, we detected Borre
American Society for Microbiology.
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5. Lone Star Tick-Infecting Borreliae Are Most Closely Related to the Agent of Bovine Borreliosis
Although Borrelia theileri, the agent of bovine borreliosis, was described at the turn of the century (in 1903), its relationship with borreliae causing Lyme disease or relapsing fever remains undescribed. We tested the previously published hypothesis that spirochetes infecting Lone Star ticks (Amblyomma americanum) may comprise B. theileri by analyzing the
American Society for Microbiology.
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6. Phylogenetic Placement of Rickettsiae from the Ticks Amblyomma americanum and Ixodes scapularis†
A rickettsial isolate (isolate MOAa) belonging to the spotted fever group (SFG) was obtained from the lone star tick Amblyomma americanum. We used PCR to characterize the genes for the rickettsial outer membrane proteins rOmpA and rOmpB. We sequenced the PCR products (domains I of both the rompA gene and the rompB gene) of MOAa and WB-8-2, another rickettsia
American Society for Microbiology.
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7. Sensitive Detection of Ehrlichia chaffeensis in Cell Culture, Blood, and Tick Specimens by Reverse Transcription-PCR
Ehrlichia chaffeensis is an obligatory intracellular bacterium of monocytes and macrophages and the etiologic agent of human monocytic ehrlichiosis, an emerging zoonosis. The Lone Star tick (Amblyomma americanum) has been implicated as the primary vector of E. chaffeensis. The present study examined the sensitivity of the nested reverse transcription (RT)-PC
American Society for Microbiology.
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8. Borrelia Species in Host-Seeking Ticks and Small Mammals in Northern Florida
The aim of this study was to improve understanding of several factors related to the ecology and environmental risk of Borrelia infection in northern Florida. Small mammals and host-seeking adult ticks were collected at several sites, and specimens were tested for the presence of Borrelia species, primarily by PCR amplification. Tissues from some vertebrates
American Society for Microbiology.
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9. Glycerophosphodiester Phosphodiesterase Gene (glpQ) of Borrelia lonestari Identified as a Target for Differentiating Borrelia Species Associated with Hard Ticks (Acari:Ixodidae)
A glpQ ortholog was identified in DNA from Borrelia lonestari-positive Amblyomma americanum, providing further evidence that B. lonestari is more closely related to the relapsing fever group spirochetes than to borreliae that cause Lyme disease. This finding provides a basis for developing diagnostic assays to differentiate species of borrelia transmitted by
American Society for Microbiology.
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10. The omp-1 Major Outer Membrane Multigene Family of Ehrlichia chaffeensis Is Differentially Expressed in Canine and Tick Hosts
Sixteen of 22 omp-1 paralogs encoding 28-kDa-range immunodominant outer membrane proteins of Ehrlichia chaffeensis were transcribed in blood monocytes of dogs throughout a 56-day infection period. Only one paralog was transcribed by E. chaffeensis in three developmental stages of Amblyomma americanum ticks before or after E. chaffeensis transmission to naïv
American Society for Microbiology.
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11. The travels of a lone star tick.
A lone-star tick, Amblyomma americanum, was found as a pedunculated lesion on the back of the arm of an 84 year old man in Northern Ireland. This was acquired on a visit to the USA. The tick is found mainly in Texas and the Ozark mountains of Missouri, with scattered foci in other parts of southern USA. It is the vector of Rocky Mountain spotted fever. As wo
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12. American Canine Hepatozoonosis
American canine hepatozoonosis (ACH) is a tick-borne disease that is spreading in the southeastern and south-central United States. Characterized by marked leukocytosis and periosteal bone proliferation, ACH is very debilitating and often fatal. Dogs acquire infection by ingesting nymphal or adult Gulf Coast ticks (Amblyomma maculatum) that, in a previous li
American Society for Microbiology.