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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.
31

Comparison of host-parasite relationships of Fasciola gigantica infection in cattle (Bos indicus) and swamp buffaloes (Bubalus bubalis) /

Molina, Elizabeth C. January 2005 (has links)
Thesis (Ph.D.) - James Cook University, 2005. / Includes reprints of short communications published inTropical Animal Health and Production, 37 (2005), p. 215-221 and p. 451-455. Typescript (photocopy) Bibliography: leaves 108-127.
32

Motolice jaterní - léčba a rezistence / Liver fluke - treatment and resistance

Kněžíková, Tereza January 2017 (has links)
Charles University Faculty of Pharmacy in Hradec Králové Department of Pharmacology and Toxicology Student: Tereza Kněžíková Supervisor: PharmDr. Ivan Vokřál, Ph.D. Title of diploma thesis: Liver fluke - treatment and resistence Fasciola hepatica is a parasite of global importance that we find both in farm animals and in humans. This thesis aims to summarize information on the potential of drugs and treatment alternatives that are suitable for treatment of F. hepatica. Given that for a number of drugs used in the past, as well as the drugs currently administered, resistance developed, this thesis is also focused on this phenomenon, especially the mechanisms of its origin. The drugs used to treat fasciolosis are called antitrematodal drugs. They can be divided into five chemical groups, of which the most important group are currently benzimidazoles and their representative triclabendazole. Also other drugs as albendazole, clorsulon, hexachlorophene, closantel, diamphenitide, bithionol, rafoxanide are important. The rate of resistance development is affected by many factors that may be genetic, biological or functional. F. hepatica actively uses its enzymatic system, especially oxidation enzymes or efflux transporters. The influence on the development of resistance, apart from the parasite itself,...
33

Fasciolosis en vicuñas (vicugna vicugna) en el distrito de Paccha, provincia de Yauli – Junín

Samamé Arrieta, Luis Miguel January 2014 (has links)
El objetivo del presente estudio fue determinar la presencia de huevos de Fasciola hepatica en vicuñas en el distrito de Paccha, provincia de Yauli – Junín, así como, estimar la frecuencia y determinar la asociación con las variables sexo y estrato etario; además determinar la carga parasitaria (hpg). Considerando que se tratan de animales silvestres, se tomaron muestras del mayor número de vicuñas posibles provenientes de un chaccu realizado durante la época de esquila en el mes de setiembre del 2010. Las muestras de heces fueron tomadas directamente del recto de los animales, siendo almacenadas y conservadas en refrigeración a 4ºC para su traslado y evaluación en el Laboratorio de Parasitología de la Facultad de Medicina Veterinaria de la Universidad Nacional Mayor de San Marcos. El diagnóstico de la frecuencia de F. hepatica se realizó mediante la técnica de sedimentación rápida y la determinación de la carga parasitaria, huevos por gramo de heces (hpg), mediante el método de Mc Master modificado. Se encontró una frecuencia de F. hepatica del 32.9%. Respecto a la variable sexo, se halló frecuencias en macho y hembra del 35.8 y 29% respectivamente, y respecto a la variable estrato etario, las frecuencias en cría, juvenil y adulto fueron de 5.6, 45.7 y 33.3 % respectivamente. No se encontró diferencia significativa (p<0.05%) entre las variables sexo, sin embargo, hubo asociación significativa con la variable estrato etario, donde los animales juveniles presentaron un alta frecuencia. La carga promedio fue de 23.7 hpg. / Tesis
34

A study of snail hosts for Fasciola hepatica in Utah Valley

Briem, Robert Michael 01 August 1971 (has links)
The Meat Inspection Division of the Bureau of Animal Industry in 195 0 reported that 322,647 livers or 2. 4% of 13,112,802 cattle slaughtered under United States Federal Inspection were condemned due to liver fluke infections (Price, 1953). This would amount to an annual loss of 3 million dollars in livers alone considering each liver weighed 10 pounds and retailed 65 cents per pound. This figure could conceiv-ably double or triple if additional losses due to animal death, decreased milk production, poor economic utilization of feed or lower livestock prices were considered.
35

Cytochrome c peroxidase in trematodes : studies in Schistosoma mansoni and Fasciola hepatica

Campos, Elida Geralda. January 1996 (has links)
No description available.
36

Behandlung und Verlaufskontrolle der therapieresistenten Leberegelinfektion (Fasziolose) mit Triclabendazol

Freise, Stefan 09 April 2001 (has links)
Die Effektivität und Verträglichkeit von Triclabendazol wurde in einer klinischen Phase 2 Studie untersucht. 81 Patienten (51 weiblich, 30 männlich, Alter 15-81 Jahre) mit chronischer oder latenter Fasciola hepatica Infektion, bei denen mindestens eine antihelminthische Therapie fehlgeschlagen war wurde in die Studie aufgenommen. Die Patienten erhielten 20mg/Kg Triclabendazol in 2 Dosierungen a 10 mg/Kg im Abstand von 12 h postprandial. Der Therapieerfolg wurde durch mikroskopische Stuhluntersuchungen, Bestimmung exkretorisch-sekretorischer Antigene im Stuhl und Ultraschall überprüft. Bei Siebzig (92%) von 76 Patienten konnten in der Nachuntersuchungsperiode (60 Tage) keine Fasciola hepatica-Eier in den mikroskopischen Stuhluntersuchungen nachgewiesen werden. Die häufigsten unerwünschten Wirkungen waren kolikartige Oberbauchbeschwerden, die bei 40 Patienten (49%) zeitgleich mit der Passage der Parasiten durch die Gallengänge beobachtet wurden. Triclabendazol ist eine effektive Therapie für Patienten mit Fasziolose bei denen andere antihelmithische Therapien nicht wirksam sind. / The efficacy and tolerability of triclabendazole (TCZ) was assessed in a clinical phase 2 study. Eighty-one patients (51 female, 30 male, age 15- 81 years) with chronic or latent F. hepatica infection refractory to previous anti-helminthic chemotherapy were enrolled in a 60 day open, non-comparative trial. Patients received 20 mg/kg TCZ as two doses of 10 mg/kg administered after food 12 hr apart. Efficacy of treatment was assessed by stool microscopy, determination of fasciola excretory-secretory antigen in feces, and by ultrasonography. Seventy (92%) of the 76 patients who completed the 60 day follow up period became egg negative. The most important adverse event was colic-like abdominal pain (40 patients [49%]) consistent with the expulsion of the parasite through the bile ducts as confirmed by US on Days 2 - 7. Triclabendazole is an effective therapy for the treatment of F. hepatica infection in patients who have failed to respond to other antihelminthic agents.
37

Análise espacial do risco de fasciolose bovina no estado do Espírito Santo por meio dos sistemas de informações geográficas

Freitas, Deivid França 27 February 2013 (has links)
Made available in DSpace on 2016-12-23T13:53:36Z (GMT). No. of bitstreams: 1 Deivid Franca Freitas.pdf: 4560063 bytes, checksum: a75776cab41721dc487d8be459fbc52e (MD5) Previous issue date: 2013-02-27 / The fasciolosis is a disease that affects domestic and wild ruminants and eventually the man. By causing great economic losses to cattle ranching and the high power of global dissemination, it sought alternatives to facilitate the understanding and visualization of disease delimiting potential risk areas in the Espírito Santo state. Thus, favorability maps were drawn on the current and future risk to F. hepatica based on climatic and environmental variables considered essential for maintenance of the disease and bioclimatological zoning maps and prevalence through the Geographic Information System (GIS). The data of cattle slaughter in the Espírito Santo were collected from the 11 slaughterhouses supervised by federal and state inspection services (SIF/SIE/MAPA), beyond the origins of livestock slaughtering in a slaughterhouse located in the municipality of Anchieta in the years 2009 to 2011. So, mapping results showed that areas of high risk gaskets totaled 35.42% for the current risk and tended to lessen with increases of 1°C to 5°C in temperature for 33.84%. The zoning map showed that 52.24% of the state areas are located in zones considered suitable for disease development. The combination of maps generated by zoning and prevalence of the 11 slaughterhouses distributed in the state showed that the highest prevalence rates were found in the municipalities located in the Southern region with averages ranging from 0.01% to 28.41%. Considering the result became clear that the epidemiological data, combined with GIS become a valuable tool for making decisions in order to minimize the occurrence and prioritize strategies for prevention and control of fasciolosis in Espirito Santo / A fasciolose é uma enfermidade que acomete os ruminantes domésticos e selvagens e eventualmente o homem. Por ocasionar grandes perdas econômicas à pecuária mundial e pelo alto poder de disseminação, buscou-se alternativas para facilitar a compreensão e visualização da doença delimitando possíveis áreas de risco no estado do Espírito Santo. Dessa forma, foram elaborados mapas de favorabilidade sobre o risco atual e futuro para F. hepatica com base em variáveis ambientais e climáticas consideradas fundamentais para manutenção da doença e mapas de zoneamento bioclimatológico e de prevalência por meio do Sistema de Informações Geográficas (SIG). Os dados de abate de bovinos no Espírito Santo foram coletados junto a 11 matadouros fiscalizados pelos serviços de inspeção federal e estadual (SIF/SIE/MAPA), além das origens do gado abatido em um matadouro localizado no município de Anchieta nos anos de 2009 à 2011. Assim, os resultados do mapeamento demonstraram que as áreas de alto risco perfizeram um total de 35,42% para o risco atual e tenderam a diminuir com os acréscimos de 1°C a 5°C na temperatura para 33,84%. O mapa de zoneamento demonstrou que 52,24% das áreas do estado encontram-se em zonas consideradas aptas para o desenvolvimento da doença. A combinação dos mapas gerados pelo zoneamento e das prevalências observadas nos 11 matadouros distribuídos no estado demonstraram que as maiores prevalências foram verificadas nos municípios situados na região Sul com médias que variaram de 0,01% à 28,41%. Dessa forma, ficou evidente que dados epidemiológicos aliados ao SIG podem ser considerados uma ferramenta valiosa para a tomada de decisões que visem minimizar a ocorrência e priorizar estratégias de prevenção e controle da fasciolose no Espírito Santo
38

Prevalência e distribuição espacial da cisticercose e fasciolose bovina no estado de Goiás / Prevalence and spatial distribution of cysticercosis and fasciolosis bovine in the state of Goiás

Aquino, Fernanda Martins de 08 March 2017 (has links)
Submitted by Cássia Santos (cassia.bcufg@gmail.com) on 2017-03-31T11:35:53Z No. of bitstreams: 2 Dissertação - Fernanda Martins de Aquino - 2017.pdf: 2825789 bytes, checksum: 21dd668e99af981f702f5b0d0823a01c (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2017-04-03T12:12:17Z (GMT) No. of bitstreams: 2 Dissertação - Fernanda Martins de Aquino - 2017.pdf: 2825789 bytes, checksum: 21dd668e99af981f702f5b0d0823a01c (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Made available in DSpace on 2017-04-03T12:12:17Z (GMT). No. of bitstreams: 2 Dissertação - Fernanda Martins de Aquino - 2017.pdf: 2825789 bytes, checksum: 21dd668e99af981f702f5b0d0823a01c (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2017-03-08 / Amongst the several parasite-diseases that may be found on the bovine species slaughter line, cysticercosis surely is the most frequent one. Besides being a zoonosis and a public health issue, it also causes great economic losses on the Brazilian meat productive chain. On the other hand, fasciolosis, also considered a zoonosis, has a lower occurrence when compared to cysticercosis, fact that may be due to its epidemiologic dynamics. Aiming to learn the level of infection of these zoonosis in the bovine herd of the state of Goiás, this project was undertaken with the scope of determining the prevalence and spatial distribution, as well to evaluate the association with some epidemiologic variables with the occurrence of these diseases and also to estimate economic losses inflicted on the producers and industries. A retrospective study was carried out on a total of 23.255.979 animals slaughtered per year, mesoregions and microregions. The data were used to create one epidemiologic map for bovine cysticercosis and one for bovine fasciolosis, gathering all cities of the state of Goiás. A prevalence of bovine cysticercosis on the state of Goiás of 0,53% (CI 95% 0,5295 – 0,5354), where the percentage of viable cysticercosis was 42,31%, non-viable cysticercosis 57,69% and the presence of bovine fasciolosis was de 0,0026% (CI 95% 0,0024 – 0,0028). The mesoregion Centro presented a greater chance (OR = 4,44) of finding positive cattle for cysticercosis when compared to the mesoregions Norte (OR = 1) and Nordeste (OR = 1,02), whilst the mesoregions diagnosed with greater chances of finding animals positive for fasciolosis, due to having a greater effective herd (p ≤ 0,05), were Noroeste, Sul, part of the region Centro and two cities of the region Leste of the state. The losses estimated for the evaluated period, from 2007 to 2014, ranged from R$ 64.809.817,50 (US$ 20.574.545,24) due to the presence of cysticercosis, and around R$ 15.072,75 (US$ 4.785) due to the presence of Fasciola hepatica in bovine liver. Such results outline the importance of developing strategic measures and action policies to try and control the spreading of these relevant zoonosis. / Dentre os vários parasitos que podem ser encontrados na linha de abate da espécie bovina, é notório que a cisticercose é a de maior frequência. Além de ser uma zoonose e um problema de saúde pública, ainda causa grandes prejuízos econômicos na cadeia produtiva de carnes do Brasil. Por outro lado a fasciolose, também considerada uma zoonose, possui uma menor ocorrência quando comparada à cisticercose, fato que pode estar atribuído a sua dinâmica epidemiológica. Visando conhecer o nível de infecção destas zoonoses no rebanho bovino goiano, realizou-se este trabalho com o objetivo de determinar a prevalência e a distribuição espacial, além de avaliar a associação de algumas variáveis epidemiológicas com a ocorrência destas enfermidades nos animais e estimar as perdas econômicas causadas aos produtores e indústrias. Foi realizado um estudo do tipo retrospectivo referente a um total de 23.255.979 animais abatidos agrupados por ano, mesorregiões e microrregiões de Goiás. Os dados foram utilizados para criar um mapa epidemiológico da cisticercose bovina e um mapa epidemiológico da fasciolose bovina abrangendo todos os municípios goianos. A prevalência de cisticercose bovina no estado de Goiás foi de 0,53% (IC 95% 0,5295 – 0,5354), sendo a porcentagem de cisticercose viável 42,31% e cisticercose inviável 57,69% e a prevalência de fasciolose bovina de 0,0026% (IC 95% 0,0024 – 0,0028). A mesorregião Centro apresentou maior chance (OR = 4,44) de encontrar bovinos positivos para a cisticercose quando comparada as mesorregiões Norte (OR = 1) e Nordeste (OR = 1,02), enquanto as mesorregiões diagnosticadas com chances mais elevadas de se encontrar animais com fasciolose, porque continham maior rebanho efetivo (p ≤ 0,05) foram a Noroeste, Sul, parte da região Centro e dois municípios da região Leste do estado. As perdas estimadas para o período analisado, de 2007 a 2014, foram de R$ 64.809.817,50 reais (US$ 20.574.545,24 dólares) devido à presença da cisticercose no rebanho e cerca de R$ 15.072,75 reais (US$ 4.785 dólares) devido à presença de Fasciola hepatica no fígado de bovinos. Os resultados encontrados neste trabalho destacam a importância de se realizar medidas e ações políticas estratégicas na tentativa de controlar a disseminação destas importantes zoonoses.
39

Desarrollo de un kit ELISA tipo sandwich, para la detección de antígenos de excreción-secreción de Fasciola hepatica linnaeus, 1758

Echevarria Del Valle, Rinaldo Josué January 2013 (has links)
La fasciolosis, producida por Fasciola hepatica, es una parasitosis cosmopolita de importancia médico-veterinaria que afecta a la ganadería lechera con prevalencias superiores al 80% que generan significativas pérdidas económicas. Por lo tanto, es importante contar con técnicas de diagnóstico que permitan la identificación temprana del parásito como las técnicas de captura cuando el antígeno se encuentra en baja concentración en la muestra. El objetivo del presente trabajo fue desarrollar un kit de ELISA para detectar antígenos de excreción-secreción de Fasciola hepatica. Se desarrolló un kit de ELISA tipo sandwich para la detección de antígenos de excreción-secreción de Fasciola hepatica, el cual alcanzó un límite de detección de 100 ng/mL, empleando una concentración óptima de anticuerpo de captura (anticuerpos policlonales de ratón) y segundo anticuerpo (anticuerpos policlonales de conejo) de 10 y 5 µg/mL, respectivamente; y una dilución óptima del conjugado (anticuerpo monoclonal anti-inmunoglobulinas de conejo conjugado con la enzima peroxidasa) de 1/1000. El kit de ELISA tipo sandwich, presento un valor de sensibilidad del 100%, una especificidad del 96.6% y valores predictivos positivos y negativos de 50% y 96.6% respectivamente; con relación al examen coproparasitológico directo. Al comparar el ELISA tipo sandwich con la contrainmunoelectroforesis (CIEF) se obtuvo una especificidad de 93.5% y un valor predictivo negativo del 100%. El kit de ELISA tipo sandwich desarrollado permite detectar antígenos metabólicos en muestras de heces de ganado ovino. / Tesis
40

Estudo estrutural e funcional das proteínas ligadoras de ácidos graxos (FABP- Fatty Acid Binding Proteins) de Fasciola hepatica / Study structural and functional fatty acid binding proteins of Fasciola hepatica

Wagner Lopes 26 October 2011 (has links)
As proteínas ligadoras de ácidos graxos (Fatty Acid Binding Proteins, FABPs) de parasitos têm um papel importante no processo de infecção por estes organismos. Por este motivo, estas proteínas são antígenos candidatos para vacina contra a infecção por Schistosoma mansoni e Fasciola hepatica. No presente trabalho foram caracterizadas FABPs de F. hepatica e comparadas com a proteína Sm14 de S. mansoni, a FABP de parasito melhor caracterizada, mediante análise de sequências e estruturas modeladas. Também foram clonadas, expressas e purificadas as FABPs tipo 1 e tipo 3 de F. hepatica. Os resultados do presente estudo indicam que a FABP tipo 3 de F. hepatica é relacionada estrutural, imunológica e funcionalmente com a Sm14, um candidato vacinal amplamente estudado. Devido à importância da Sm14 como alvo para o desenvolvimento de vacina para a esquistossomose, as características apresentadas pela FhFABP3 de F. hepatica apontam esta proteína como um candidato importante também para o desenvolvimento de uma vacina contra a fasciolose / Parasites fatty acid binding proteins (FABPs) have an important role in infection process by these organisms. For this reason, these proteins are candidates as vaccine antigens against Schistosoma mansoni and Fasciola hepatica infection. In the present study, FABPs from F. hepatica were characterized and compared with Sm14 protein from S. mansoni, the best characterized parasite FABP, by sequence analysis and modeled structure. Type 1 and type 3 FABPs from F. hepatica were also cloned, expressed and purified. The results of this study indicated that type 3 FABP from F. hepatica is structural, immunological and functionally related with Sm14, a vaccine candidate widely studied. Due to the importance of Sm14 as a target for vaccine development for schistosomiasis, the characteristics presented by the FhFABP3 from F. hepatica suggest this protein as a candidate also important for the development of a vaccine against fasciolosis

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