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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.
51

Aspectos cl?nico-patol?gicos da paratuberculose em rebanho bovino leiteiro no munic?pio de Rio Claro, RJ. / Clinic-pathological aspects of paratuberculosis in dairy cattle in Rio Claro county, Rio de Janeiro State.

Yamasaki, Elise Miyuki 21 January 2010 (has links)
Made available in DSpace on 2016-04-28T20:18:25Z (GMT). No. of bitstreams: 1 ELISE MIYUKI YAMASAKI.pdf: 7116323 bytes, checksum: 0698deb473a21808a4e19ade2a6072b4 (MD5) Previous issue date: 2010-01-21 / The epidemic and clinic-pathological aspects of paratuberculois in a dairy cattle herd in the Rio Claro county, southern Rio de Janeiro region, are described. In the years 2006-2009, eight adult cows presented chronic-intermittent diarrhea, chronic weight loss and normal appetite. At necropsy, the subserosal lymphatics were proeminent and dilated, mesenteric nodes were enlarged, and intestinal mucosa was corrugated, thickened and of microgranular aspect. Especially, in duodenum, was observed polipoids lesions in mucosa surface. Histopathology revealed, from the duodenum to the rectum, severe and diffuse granulomatous inflammation of the lamina propria and submucosa, broadened and distorced villi, marked dilatation of the lymphatic vessels in their apex, lymphangioectasia and granulomatous lymphangitis in the submucosa. Ziehl-Neelsen stain revealed variable amounts of acid-fast bacilli in macrophages, Langhan s giant cells and freely in the musosa and submucosa of the small intestine and colon, and in lymphnodes. Lesions in the lamina propria, particularly in the jejun and ileum, in some animals, were severe hypertrophy; polipoids lesions observed in duodenum mucosa was markedly muscularis mucosa hipertrophy , intestinals and duodenal glands hiperplasia. Mycobacterium avium subsp. paratuberulosis was isolated by bacterial cultivation of samples from feces, intestinal mucosa and milk, and identified through IS900 PCR. From 298 cows, older than three years, the percentage of reactive animals was 40%, in indirect ELISA test. The diagnosis of paratuberculosis was based on clinic-epidemiological data, sorology, bacterial isolation and IS900 PCR. After the adoption of control measures, as slaughter of sick cows and selective slaughter of soropositive animals, was observed reduction of clinical cases in the herd, from six cases to one case per year, in three years of study. / Descreve-se os aspectos epidemiol?gicos e cl?nico-patol?gicos da paratuberculose em um rebanho bovino leiteiro no munic?pio de Rio Claro, regi?o Sul-Fluminense, Rio de Janeiro. No per?odo de 2006 a 2009, oito vacas adultas da ra?a Girolanda apresentaram diarreia cr?nico-intermitente, perda de peso progressivo e apetite normal. ? necropsia observou-se vasos linf?ticos subserosos proeminentes, linfonodos mesent?ricos aumentados de volume, ?midos ao corte, serosa do intestino com aspecto anelado e cerebr?ide, mucosa espessada, pregueada e com aspecto microgranular. Em especial, no duodeno havia les?es polip?ides na supef?cie da mucosa. ? microscopia, desde o duodeno at? o intestino grosso, havia acentuada inflama??o granulomatosa difusa, marcada dilata??o dos vasos linf?ticos no ?pice das vilosidades, linfangiectasia e linfangite granulomatosa na submucosa, muscular e serosa, altera??es tamb?m vistas nos linfonodos mesent?ricos. A colora??o de Ziehl-Neelsen revelou, vari?vel quantidade de bacilos ?lcool-?cido resistentes no interior de macr?fagos, c?lulas gigantes de Langhans e livres na mucosa e submucosa do intestino delgado e grosso e em linfonodos mesent?ricos. A l?mina pr?pria da mucosa, principalmente do jejuno e ?leo de alguns animais, apresentava acentuada hipertrofia; as les?es polip?ides correspondiam ? marcada hipertrofia da muscular da mucosa, hiperplasia de gl?ndulas duodenais e intestinais. Mycobacterium avium subsp. paratuberculosis foi isolado em cultivo bacteriano a partir de amostras de fezes, raspado de mucosa intestinal e leite e identificado pela t?cnica de PCR IS900. Atrav?s da avalia??o sorol?gica semestral, foram analisadas 298 vacas, a partir de tr?s anos de idade, e observou-se cerca de 40% de animais reagentes ao teste ELISA indireto no per?odo estudado. O diagn?stico da paratuberculose foi baseado nos dados cl?nicopatol?gicos, sorologia, isolamento e identifica??o do agente em amostras de fezes, raspado de mucosa e leite, atrav?s do cultivo bacteriano e PCR IS900. Ap?s implementa??o de medidas de controle, tais como elimina??o de animais doentes, abate seletivo dos soropositivos, separa??o dos bezerros ao nascer com utiliza??o de banco de colostro, observou-se diminui??o da ocorr?ncia de casos cl?nicos no rebanho, de seis casos por ano para cerca de um caso por ano, em tr?s anos de estudo.
52

Epidemiological investigation on the occurrence of Mycobacterium avium subspecies paratuberculosis in different matrices from cattle and zoo animals by IS900 polymerase chain reaction assays / Epidemiologische Untersuchung zum Vorkommen von Mycobacterium avium subspecies paratuberculosis in verschiedenen Matrices von Rindern und Zootieren mittels IS900 PCR-Verfahren

Münster, Pia 16 May 2012 (has links)
No description available.
53

Lingular and Middle Lobe Infiltrates in an Elderly Woman

Byrd, R, Payne, J L., Roy, T M. 01 October 1995 (has links)
No description available.
54

Caractérisation épidémiologique de la maladie de Crohn au Québec

Lowe, Anne-Marie January 2008 (has links)
Mémoire numérisé par la Division de la gestion de documents et des archives de l'Université de Montréal.
55

Caractérisation épidémiologique de la maladie de Crohn au Québec

Lowe, Anne-Marie January 2008 (has links)
Mémoire numérisé par la Division de la gestion de documents et des archives de l'Université de Montréal
56

Molecular biology techniques as a tool for detection and characterisation of Mycobacterium avium subsp. paratuberculosis /

Englund, Stina, January 2002 (has links) (PDF)
Diss. (sammanfattning) Uppsala : Sveriges lantbruksuniv., 2002. / Härtill 5 uppsatser.
57

Detection and confirmation of Mycobacterium avium subsp. paratuberculosis in clinical samples /

Herthnek, David, January 2006 (has links) (PDF)
Lic.-avh. (sammanfattning) Uppsala : Sveriges lantbruksuniversitet, 2006. / Härtill 2 uppsatser.
58

Expression and regulation of the iron regulatory hormone and antimicrobial peptide hepcidin in mycobacteria-infected mice and macrophages

Sow, Fatoumata B. January 2007 (has links)
Thesis (Ph. D.)--Ohio State University, 2007. / Full text release at OhioLINK's ETD Center delayed at author's request
59

Mechanisms for the interaction of environmental mycobacteria with host cells /

Harriff, Melanie J. January 1900 (has links)
Thesis (Ph. D.)--Oregon State University, 2008. / Printout. Includes bibliographical references. Also available on the World Wide Web.
60

Studies on the interaction between Mycobacterium avium subsp. paratuberculosis and bovine mastitis associated Escherichia coli in a mammary epithelial cell model and identification of passive shedding in small ruminants / Estudos da interação entre Mycobacterium avium subsp. paratuberculosis e Escherichia coli associada à mastite bovina em um modelo de células epiteliais mamárias e identificação de transmissores passivos em pequenos rumantes

Schwarz, David Germano Gonçalves 09 December 2016 (has links)
Submitted by Marco Antônio de Ramos Chagas (mchagas@ufv.br) on 2017-03-14T18:51:10Z No. of bitstreams: 1 texto completo.pdf: 943385 bytes, checksum: 8adee72c3a2e9d49512f689910c76c69 (MD5) / Made available in DSpace on 2017-03-14T18:51:10Z (GMT). No. of bitstreams: 1 texto completo.pdf: 943385 bytes, checksum: 8adee72c3a2e9d49512f689910c76c69 (MD5) Previous issue date: 2016-12-09 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / Mastite causada por Escherichia coli tem a capacidade de estimular intensamente o sistema imunológico e desencadear rapida inflamação na glândula mamária. Em contraste, Mycobacterium avium subsp. paratuberculosis (MAP), agente etiológico da paratuberculose, caracterizada por enterite granulomatosa crônica, pode infectar a glândula mamária sem estimular intensamente a resposta inflamatória. A interação dessas duas bactérias na glândula mamária ainda é desconhecida. Em alguns casos, tanto a eliminação de MAP pelo leite como pelas fezes podem ocorrer de forma passiva, após a infecção ascendente da glândula mamária ou após ingestão de MAP, respectivamente. Estes animais, chamados passive-shedders, são importantes como uma fonte de infecção a animais suscetíveis no rebanho. O objetivo deste estudo foi investigar a relação entre MAP e E. coli em células de glândula mamária sob condições experimentais e verificar a presença de animais passive-shedders. A relação entre uma cepa K-10 de MAP e E. coli isolada de leite mastítico em linhagem de células epiteliais mamárias (MAC-T) foi avaliada. As células previamente infectadas com MAP diminuíram a invasão de E. coli durante 120 min de experimentação. Contudo, a eficiência da translocação de E. coli e a viabilidade das células MAC-T não foram comprometidas. Ao contrário, células previamente infectadas por E. coli aumentaram a capacidade de translocação baso-apical de MAP até os 30 min e diminuiu aos 120min pós-infecção. A quantificação de citocinas relevou que a expressão de IL-1β aos 120min foi significativa (P<0.05) para células infectadas por MAP + E. coli e E. coli apenas. As expressões de MAPKp 38 e IL-10 não foram significativas, independente do tempo pós-infecção. Para detectar a ocorrência de animais passive-shedders, 10 propriedades foram previamente investigadas para a presença de MAP. Treze cabras foram positivas por cultura de fezes e/ou PCR de leite. Dentre os animais positivos, quatro (4/13) foram adquiridas e avaliados por IS900-PCR, cultura de fezes, de leite e de tecido, e sorologia (ELISA). Todos os resultados foram negativos no período de um ano, demonstrando que os animais realizaram o fenômeno pass-through e a contaminação ascendente da glândula mamária, sem tornarem-se infectados. No geral, esses resultados indicam que a presença de MAP nas células mamárias pode dificultar a capacidade de invasão de E. coli, mas quando no interior da célula mamária, translocam-se mais eficientemente. No entanto, quando as células são previamente infectadas por E. coli, MAP é rapidamente atraído da região subepitelial para a superfície celular. A produção de IL-1β intensifica a atração de macrófagos para o sítio de infecção, onde MAP se beneficia, infectando-os. / Mastitis caused by Escherichia coli can intensely stimulate the immune system and rapidly trigger inflammation in the mammary gland. In contrast, Mycobacterium avium subsp. paratuberculosis (MAP), the etiological agent of paratuberculosis, characterized by chronic granulomatous enteritis, can infect the mammary gland without intensely stimulating the inflammatory response. The interaction of these two species in the mammary gland is still unknown. In some cases, both the elimination of MAP by milk and faeces may occur passively, either through ascending infection of the mammary gland or through ingestion of MAP, respectively. These animals are called passive- shedders and are important as a source of infection to susceptible animals in the herd. The aim of this study was to investigate the relationship between MAP and E. coli in mammary gland cells under experimental conditions and verify the presence of passive- shedder animals. The relationship between a K-10 strain of MAP and E. coli isolated from mastitic milk in mammary epithelial cell lines was evaluated. Cells previously infected by MAP decreased E. coli invasiveness during 120min experimentation. However, the efficiency of E. coli translocation was not compromised, nor was the viability of the MAC-T cells. In contrast, cells previously infected by E. coli showed increased basal-apical translocation capacity of MAP up to 30 min and decreased at 120 min postinfection. Quantification of cytokines showed that IL-1β expression at 120 min was significantly increased in cells infected by MAP + E. coli and E. coli only. Expression of MAPKp 38 and IL-10 were not significant, regardless of time postinfection. To determine the occurrence of passive-shedders, 10 properties were previously investigated for MAP detection. Thirteen goats were positive by faeces culture and/or milk PCR. Among the positive animals, four (4/13) were evaluated by IS900-PCR, feces culture, milk and tissue culture and serology (ELISA). All the results were negative over a one-year period, demonstrating that the animals performed pass- through phenomenon and upward contamination of the mammary gland without becoming infected. Together, these results indicate that the presence of MAP in mammary cells may hamper capacity of E. coli invasion, but when within the mammary cell, the bacteria evade more efficiently. However, when the cells are pre-infected by E. coli, MAP is rapidly attracted from the subepithelial region to the cell surface. IL-1β production enhances the attraction of macrophages to the site of infection, where MAP benefits by infecting them.

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