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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
91

Cytauxzoon felis in Missouri ticks /

Bondy, Peter Jacob. January 2004 (has links)
Thesis (M.S.)--University of Missouri--Columbia, 2004. / "May, 2004." Typescript. Includes bibliographical references (leaves 35-38). Also issued on the Internet.
92

Determinants of human exposure to Fipronil following use as a topical flea and tick treatment of companion animals

Bigelow Dyk, Melinda Michelle, January 2009 (has links)
Thesis (Ph. D.)--University of California, Riverside, 2009. / Includes abstract. Includes bibliographical references (leaves 201-210). Issued in print and online. Available via ProQuest Digital Dissertations.
93

Investigating the maintenance of the Lyme disease pathogen, Borrelia burgdorferi, and its vector, Ixodes scapularis, in Tennessee

Rosen, Michelle Erin. January 2009 (has links)
Thesis (M.S.)--University of Tennessee, Knoxville, 2009. / Title from title page screen (viewed on Mar. 18, 2010). Thesis advisor: Graham Hickling. Vita. Includes bibliographical references.
94

Identification of Borrelia sp. by polymerase chain reaction on ticks and patient samples from Missouri /

Cyr, Tracy L. January 1999 (has links)
Thesis (Ph. D.)--University of Missouri-Columbia, 1999. / Typescript. Vita. Includes bibliographical references (leaves 70-85). Also available on the Internet.
95

Identification of Borrelia sp. by polymerase chain reaction on ticks and patient samples from Missouri

Cyr, Tracy L. January 1999 (has links)
Thesis (Ph. D.)--University of Missouri-Columbia, 1999. / Typescript. Vita. Includes bibliographical references (leaves 70-85). Also available on the Internet.
96

Occurrence of blood-borne tick-transmitted parasites in tsessebe (Damaliscus lunatus lunatus) antelope in Vaalbos National Park, Northern Cape Province

Brothers, Peter Stanley. January 2009 (has links)
Thesis (MSc (Veterinary Tropical Diseases, Veterinary Science))--University of Pretoria, 2008. / Includes bibliographical references. Also available in print format.
97

Ecological determinants of lyme disease in an endemic community /

Pardanani, Neeta N. January 2004 (has links)
Thesis (Ph. D.)--University of Rhode Island, 2004. / Typescript. Includes bibliographical references (leaves 77-88).
98

Cytauxzoon felis in Missouri ticks

Bondy, Peter Jacob. January 2004 (has links)
Thesis (M.S.)--University of Missouri--Columbia, 2004. / Typescript. Includes bibliographical references (leaves 35-38). Also issued on the Internet.
99

Componente celular inflamatório no local da fixação de carrapatos adultos Rhipicephalus sanguineus LATREILLE, 1806 em cães imunizados com o antígeno Bm86

Furlan, Bruna Nucci [UNESP] 25 November 2011 (has links) (PDF)
Made available in DSpace on 2014-06-11T19:27:58Z (GMT). No. of bitstreams: 0 Previous issue date: 2011-11-25Bitstream added on 2014-06-13T19:57:08Z : No. of bitstreams: 1 furlan_bn_me_jabo.pdf: 897898 bytes, checksum: 0afdcf0092ae63fb6d940df6e256a3d4 (MD5) / Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) / A imunização dos hospedeiros contra carrapatos tem sido considerada como uma alternativa promissora. Vacinas contendo o antígeno Bm86 (Gavac®, TickGard®) foram desenvolvidas originalmente para controlar infestações de Rhipicephalus Boophilus microplus. Como recentes estudos filogenéticos mostraram que o gênero Rhipicephalus inclui todas as cinco espécies de Boophilus, o papel protetor do antígeno Bm86 em cães imunizados e desafiados com carrapatos Rhipicephalus sanguineus foi testado previamente neste laboratório. Dando continuidade, o presente estudo teve como objetivo descrever o componente celular inflamatório no local de fixação do carrapato em cães imunizados com o antígeno Bm86 e desafiados com carrapatos adultos R. sanguineus. Para tanto, cães SRD (n=8), foram distribuídos em dois grupos (não vacinado e vacinado) e receberam duas doses de 50 g do antígeno Bm86 (Hebercan®) ou placebo, com 21 dias de intervalo. Cada animal foi desafiado com 55 carrapatos adultos 15 dias após a última dose e biopsias da lesão de fixação dos carrapatos foram coletadas as 48, 96, 144 e 192 horas após sua fixação. Os fragmentos foram então processados histologicamente e as secções coradas com hematoxilina-eosina e Giemsa. Nos animais vacinados predominaram neutrófilos, eosinófilos e mastócitos na 48ª hora PF, enquanto que nos não vacinados houve predomínio de eosinófilos, neutrófilos e linfócitos. Com o decorrer da infestação, observou-se um infiltrado celular mais intenso a partir de 96h PF, atingindo as camadas mais profundas da derme, sendo composto principalmente por neutrófilos e linfócitos nos vacinados, e eosinófilos, linfócitos e neutrófilos nos não vacinados. Concluiu-se que o antígeno Bm86 administrado em cães interfere na resposta inflamatória induzida por R. sanguineus / Immunization of hosts against ticks has long been considered as a promising alternative. Vaccines containing the Bm86 antigen (e.g. Gavac®, Heber-Biotec, Cuba) have been developed to control Rhipicephalus Boophilus microplus infestations. As recent molecular phylogeny studies showed that the Rhipicephalus genus includes all five Boophilus species, the protector role of Bm86 antigen in immunized dogs challenged with adult Rhipicephalus sanguineus was investigated first at this lab. This study aimed to evaluate the inflammatory cells at the attachment site of ticks in dogs immunized by the Bm86 antigen against infestations of adults of Rhipicephalus sanguineus ticks. Mongrel dogs (n=8), were divided into two groups (non-vaccinated and vaccinated). It was given twice 50 g of Bm86 antigen (Gavac®, Heber-Biotec, Cuba) or placebo, at 21 days interval. Each animal was challenged with 55 adult ticks 15 days after the last dose. Biopsies of tick feeding lesions taken 48, 96, 144 e 192 hours post-attachment (PA) were processed through routine histology and sections 4μm thickness stained with H.E. and Giemsa for general features and cell counts, respectively. There was an inflamed dermis including an inflammatory cell infiltrate constituted overwhelmingly by neutrophils, eosinophils and mast cells in vaccinated dogs at first and eosinophils, neutrophils and lymphocytes in non-vaccinated hosts. After 96h PA, a dense and diffuse cell infiltrate reached into deep dermis, constituted overwhelmingly by neutrophils and lymphocytes in vaccinated dogs and eosinophils, lymphocytes and neutrophils in non-vaccinated dogs. It’s been concluded that antigen Bm86 administered to dogs interferes on the Rhipicephalus sanguineus induced inflammatory cell influx
100

Ação dos ésteres do ácido ricinoléico do óleo de mamona nas glândulas salivares e nos ovários de carrapatos Rhipicephalus sanguineus (Latreille, 1806) (Acari : Ixodidae). Análise histológica

Arnosti, André [UNESP] 29 July 2011 (has links) (PDF)
Made available in DSpace on 2014-06-11T19:22:59Z (GMT). No. of bitstreams: 0 Previous issue date: 2011-07-29Bitstream added on 2014-06-13T20:49:41Z : No. of bitstreams: 1 arnosti_a_dr_rcla.pdf: 716330 bytes, checksum: 028490dea75ddeba4b2b4e3b790178aa (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / O presente trabalho traz informações que mostram a interferência dos ésteres do ácido ricinoléico extraídos do óleo de mamona (Ricinus communis), no ciclo secretor das glândulas salivares e na vitelogênese de fêmeas do carrapato Rhipicephalus sanguineus, agindo diretamente nos processos de alimentação e de reprodução, respectivamente. Para a realização deste estudo, coelhos hospedeiros infestados com carrapatos, foram alimentados com ração comercial comum (controle-GC) e com ração enriquecida com os ésteres em diferentes concentrações (tratamento- GT). As glândulas salivares sofreram danos, e tiveram o citoplasma das células acinares alterado, trazendo prejuízos ao seu funcionamento, além desta substância ter acelerado a degeneração do órgão como um todo. Os ésteres interferiram na atividade de secreção celular alterando a composição da glicoproteína salivar, especialmente nas células glandulares dos ácinos II. O efeito dos ésteres na vitelogênese foi observado nos ovócitos dos carrapatos do grupo tratamento (GT), os quais apresentaram células germinativas com alterações citoplasmáticas, inibição do desenvolvimento dos ovócitos I e II para os estágios avançados (IV e V), além da interferência na maturação dos ovócitos V. Além disso, nas ampolas dos ovários dos indivíduos tratados, espermatozóides não foram observados no seu interior confirmando a ação dos ésteres no processo de reprodução. Ficou demonstrado também que os danos causados pelos ésteres nas células das glândulas salivares e dos ovários desses ectoparasitas, aumentaram na mesma proporção que houve aumento das concentrações do produto, provocando intensa degeneração dos órgãos / The present study brings information which shows the interference of ricinoleic acid esters extracted from castor oil (Ricinus communis) on the secretory cycle of Rhipicephalus sanguineus female ticks’ salivary glands and vitellogenesis, acting directly on the feeding and reproduction processes respectively. To perform this study, host rabbits were infested with ticks, fed with regular commercial rabbit food (control-CG) and with food enriched with ester in different concentrations (treatment- TG). The salivary glands were damaged and had the cytoplasm of acinar cells altered, impairing their functioning, and the toxic substance also accelerated the degeneration of the organ as a whole. The esters interfered in the cellular secretion activity altering the composition of salivary glycoproteins, especially in the glandular cells of acini II. The effect of the esters in the vitellogenesis was observed in the oocytes of ticks belonging to the treatment group (TG), whose germinative cells presented cytoplasmic alterations, inhibition of the development of oocytes I and II for advanced stages (IV and V) and interference in the maturation of oocytes V. In addition, spermatozoa were not observed in the interior of the ovaries ampoules, confirming the acaricidal potential of the esters. It was also demonstrated that the damages caused by esters in the salivary glands cells and ovary cells of these ectoparasites increased in the same proportion of the increase in the concentrations of the toxic product, causing intense degeneration of the organs

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