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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.
231

Efeitos da dexmedetomidina, por via epidural ou infusão contínua intravenosa, em gatas anestesiadas com propofol e isofluorano e submetidas a ovariossalpingohisterectomia / Effects of dexmedetomidine by epidural or continuous intravenous infusion in cats undergoing propofol-isoflurane anesthesia to ovariohysterectomy

Sérgio dos Santos Souza 05 October 2006 (has links)
Este estudo determinou e comparou os efeitos da administração epidural ou infusão contínua intravenosa de dexmedetomidina em gatas anestesiadas com propofol e isofluorano para realização de ovariossalpingohisterectomia. Vinte e uma gatas (peso: 3.06&plusmn;0.35 kg) foram pré-tratadas com dexmedetomidina (4 mcg.kg-1, IM). Quinze minutos depois, administrou-se propofol para permitir entubação orotraqueal seguido de manutenção anestésica com isofluorano diluído em oxigênio por um circuito Mapleson D com respiração espontânea. As gatas foram distribuídas aleatoriamente, em três grupos, onde receberam, por via epidural, lidocaína (1 mg.kg-1, G1, n=7) ou lidocaína (1 mg.kg-1) + dexmedetomidina (4 mcg.kg-1, G2, n=7) ou lidocaína (1 mg.kg-1) + infusão contínua intravenosa de dexmedetomidina (0,25 mcg.kg-1.min-1, G3, n=7). O volume da solução para administração epidural foi ajustada para 0.3 mL.kg-1 com solução salina. A profundidade anestésica foi realizada por um único avaliador que não possuía conhecimento dos fármacos empregados pela via epidural e intravenosa. Foram mensurados freqüência cardíaca (FC) e respiratória (FR), pressão arterial sistólica (PAS) e temperatura retal (TR) antes e quinze minutos após a medicação pré-anestésica. Durante a anestesia, FC, FR, pressões arteriais, concentração expirada de CO2, concentração expirada de isofluorano (ISOe), TR e grau de relaxamento muscular foram avaliados em intervalos de 15 minutos de 20 até 80 minutos. A hemogasometria foi realizada aos 20 e 80 minutos após a indução anestésica. Os valores de FC, FR, TR, escore de analgesia, qualidade e os tempos de recuperação anestésica foram avaliados por três horas após o término da anestesia. Utilizou-se o teste t pareado para avaliar os efeitos do pré-tratamento e os valores hemogasométricos nos dois momentos. O teste análise de variância seguido de Tukey e Friedmann seguido de Dunn foram realizados para variáveis paramétricas e não paramétricas respectivamente (p&LT;0.05). O pré-tratamento com dexmedetomidina reduziu a FC, FR, PAS e TR. A dose de propofol utilizada para indução anestésica foi 7.4&plusmn;1.4 mg.kg-1. Quando comparado ao G1, a dexmedetomidina, por via epidural, reduziu significativamente a FC dos 20 aos 65 minutos da anestesia e aos 150 e 180 minutos após o término da anestesia, entretanto, por infusão contínua intravenosa reduziu a FC em todos os momentos avaliados da anestesia e recuperação anestésica. Quando comparado ao G2, a infusão contínua intravenosa de dexmedetomidina reduziu a FC aos 60 e 90 minutos da recuperação anestésica. No G1 a média&plusmn;DP ISOe variou de 0.86&plusmn;0.28% a 1.91&plusmn;0.63% de 20 a 80 minutos. Neste período, ISOe foi significativamente menor no G2 (variação de 0.70&plusmn;0.12% a 0.97&plusmn;0.20%) e G3 (variação de 0.69&plusmn;0.12% to 1.17&plusmn;0.25%). Aos 20 minutos, a PaCO2 foi significativamente superior em G3 em relação ao G1. Os tempos de recuperação anestésica foram significativamente menores no G1, exceto o tempo de extubação se comparado ao G2. Não houve diferença significativa nas outras variáveis entre os três grupos. Conclui-se que o pré-tratamento com dexmedetomidina promoveu depressão cardiorrespiratória. A administração epidural e a infusão contínua intravenosa de dexmedetomidina reduziram o consumo do agente inalatório e produziram recuperação de melhor qualidade e mais prolongada. As administrações de dexmedetomidina causaram bradicardia, porém sem afetar a pressão arterial. / This study compared the effects of epidural or continuous intravenous infusion of dexmedetomidine in isoflurane-anesthetized cats undergoing ovariohysterectomy. Twenty-one cats (weight: 3.06±0.35 kg) were premedicated with dexmedetomidine (4 mcg.kg-1, IM). Fifteen minutes later, propofol was titrated to allow endotracheal intubation and anesthesia was maintained in spontaneously breathing cats with isoflurane in oxygen using a Mapleson D system. Cats were randomly allocated to receive either epidural lidocaine (1 mg.kg-1, G1, n=7) or epidural lidocaine (1 mg.kg-1) + dexmedetomidine (4 mcg.kg-1, G2, n=7) or epidural lidocaine (1 mg.kg-1) + continuous intravenous infusion of dexmedetomidine (0,25 mcg.kg-1. min-1, G3, n=7). The volume of either epidural injection was adjusted to 0.3 mL.kg-1 with saline. The individual controlling depth of anesthesia was blinded to the drug being administered epidurally and intravenouslly. Heart (HR) and respiratory (RR) rates, systolic arterial blood pressure (SAP) and rectal temperature (RT) were recorded before and after 15 minutes of premedication. During anesthesia, heart (HR) and respiratory (RR) rates, invasive arterial blood pressures, end-tidal CO2, end-tidal isoflurane (ISOe), RT and muscular relaxation were recorded at 15 minute intervals from 20 until 80 minutes. Arterial blood gases were measured at 20 and 80 min after induction. HR, RR, RT, analgesia score, and recovery quality and times were compared for 3 hours after end of anesthesia. Paired t test were performed to compare the premedication effects and arterial blood gases at differents intervals. ANOVA with Tukey post-test and Friedmann with Dunn post-test were performed to parametric and nonparametric values, respectively (P<0.05). Dexmedetomidine premedication decreased HR, RR, SAP and RT. The induction dose of propofol was 7.4±1.4 mg.kg-1. When compared to the G1, epidural dexmedetomidine significantly decreased HR from 20 to 65 minutes of anesthesia and 150 and 180 minutes after end of anesthesia, however, continuous intravenous infusion decreased HR all times during anesthesia and recovery time. When compared to G2, continuous intravenous infusion of dexmedetomidine decreased HR at 60 and 90 minutes during recovery. In the G1 mean±SD ISOe concentrations ranged form 0.86±0.28% to 1.91±0.63% from 20 to 80 min. At the same time interval, ISOe concentrations were significantly lower in the G2 (ISOe ranged from 0.70±0.12% to 0.97±0.20%) and G3 (ISOe ranged from 0.69±0.12% to 1.17±0.25%). PaCO2 was significantly greater in G3 than G1 at 20 minutes. The recovery times were significantly lower in the G1 except for extubation time when compared with G2. There were no significant differences among groups for the remaining variables. It was concluded that premedication with dexmedetomidine produced cardiorespiratory depression. Epidural administration and continuous intravenous infusion of dexmedetomidine significantly reduced inhalant requirements for maintaining anesthesia and produced a better anesthesia recovery although of longer duration. Dexmedetomidine administration may cause bradycardia, however reduced HR does not affect arterial blood pressure.
232

Estudo clínico da eficácia da criocirurgia no tratamento de neoplasias de pele e/ou partes moles de cães e gatos / Clinical study of effectiveness of cryosurgery in the treatment of skin and/or soft tissue neoplasia in dogs and cats.

Genilson Fernandes de Queiroz 17 September 2004 (has links)
Com objetivo de avaliar a eficácia da criocirurgia no tratamento de neoplasias de pele e/ou partes moles de cães e gatos, foram utilizados 40 animais, 27 cães e 13 gatos de raças e idades variadas encaminhados ao Serviço de Cirurgia de Pequenos Animais do Hospital Veterinário da Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo. Foram tratadas 57 lesões utilizando-se o nitrogênio líquido por meio da técnica do spray, destas 17 (29,83%) foram caracterizadas como neoplasia epitelial benigna, 22 (38,60%) neoplasia epitelial maligna, 4 (7,01%) neoplasia mesenquimal benigna, 10 (17,54%) neoplasia mesenquimal maligna, 3 (5,27%) não neoplásicos e 1 (1,75%) não caracterizado. Houve remissão total de 49 (85,96%) lesões em 32 (80%) animais. Diante destes resultados pode-se concluir que a criocirurgia foi eficaz no tratamento de tumores de pele e/ou partes moles de cães e gatos. / With the aim to evaluate the effectiveness of cryosurgery in the treatment of skin and soft tissue neoplasias of the dogs and cats it was used 40 animals, 27 dogs and 13 cats of differents ages and breeds referred to the Surgery Service of Small Animals of the Veterinary Hospital of the University of São Paulo. Fifty seven lesions were treated with the spray technique using liquid nitrogen. 17 (29,83%) were benign epithelial lesions, 22 (38,60%) malignant epithelial lesions, 4 (7,01%) benign mesenchymal lesions, 10 (17,54%) malignant mesenchymal lesions, 3 (5,27%) not neoplasia, 1 (1,75%) not characterized. There was total remission of the 49 (85,96%) lesions in 32 (80%) animals. It was concluded that the cryosurgery was effective to treat skin and/or soft tissue tumor of the dogs and cats.
233

Anatomia dental de cães (Canis familiaris) e gatos (Felis catus). Considerações cirúrgicas / Tooth anatomy of the dog (Canis familiaris) and the cat (Felis catus). Surgery considerations

Juliana Kowalesky 20 December 2005 (has links)
Com a rápida evolução da odontologia veterinária na última década, faz-se crescente a busca pelo conhecimento da área e a busca por referências bibliográficas, porém nota-se que as informações existentes de uma área essencial, a anatomia, estão limitadas a descrições básicas. Sabe-se que o conhecimento da anatomia do sistema estomatognático é de fundamental importância para que clínicos e cirurgiões possam diagnosticar e instituir tratamento adequado e preciso. Apesar dos livros de odontologia veterinária apresentarem descrições das mais simples até as mais complexas intervenções cirúrgicas, nenhum descreve detalhadamente a morfologia dentária e ainda menos suas correlações com as técnicas cirúrgicas e disfunções do sistema estomatognático o que facilitaria e daria maior precisão ao ato cirúrgico. Contudo, tais informações existem em abundância na literatura odontológica humana; considerando-se ainda, que já se faz nos animais grande parte dos procedimentos feitos no ser humano, conclui-se a importância de obter essas informações também para a prática da odontologia veterinária. Propõe-se estudar cada elemento dental individualmente, correlacionando-os com suas principais afecções. Além disso, visa-se em um segundo plano, preparar uma obra sobre a anatomia oral de cães e gatos, com aspecto clínico-cirúrgico análogo aos livros publicados para o estudo da anatomia oral humana. / With the fast evolution of veterinary dentistry in the last decade, it has been increasingly important the search for the knowledge of this area and the search for bibliographical references, however it is noted that the existent information of an essential discipline, the anatomy, is limited to basic structures. It is known that the understanding of the anatomy of the stomatognathic system is of fundamental importance so that practitioners and surgeons can diagnose and institute an appropriate and necessary treatment. In spite of the books of veterinary dentistry present descriptions of the simplest to the most complex surgical interventions, none describes the dental morphology and even less in full detail their correlations with the surgical techniques and dysfunctions of the stomatognathic system which would facilitate and give greater precision to the surgical action. However, such information exist abundantly in the dental human literature. Considering that most of these procedures are already done in humans, it can be concluded that it is important to obtain these information also for the animal dentistry. It is proposed then, to study each dental element individually, correlating them with their main affections. Besides, it is aimed, in a second plan, to prepare a work in oral anatomy of dogs and cats, with a clinical-surgical focus similar to the books published for the study of the human oral anatomy.
234

Blood transfusion in the cat

Marion, Richard S January 1983 (has links)
No description available.
235

Avaliação de efeito e segurança da toxina botulínica tipo A na indução de ptose palpebral temporária em gatos domésticos / Evaluation of the effect and safety of botulinum toxin type A to induce temporary palpebral ptosis in domestic cats

Teixeira, Myrian Kátia Iser, 1969- 28 August 2018 (has links)
Orientador: José Paulo Cabral de Vasconcellos / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Ciências Médicas / Made available in DSpace on 2018-08-28T03:59:37Z (GMT). No. of bitstreams: 1 Teixeira_MyrianKatiaIser_M.pdf: 2342582 bytes, checksum: 2e51b6261b602fa9f018d1bd96ed680a (MD5) Previous issue date: 2015 / Resumo: Objetivo: Avaliar o efeito e a segurança da toxina botulínica tipo A quando aplicada na região do músculo elevador da pálpebra superior, para a indução de ptose palpebral protetora em gatos domésticos. Métodos: Neste estudo do tipo longitudinal, série de casos com intervenção, um total de 10 gatos foram submetidos à quimiodenervação do músculo elevador da pálpebra superior esquerdo, através da aplicação transpalpebral de 10 unidades de toxina botulínica do tipo A. Alterações sistêmicas, mobilidade ocular, função visual, pressão intraocular, o aparecimento, grau e duração da ptose foram avaliados antes da aplicação, diariamente, durante os sete primeiros dias e, posteriormente, nos dias 14, 21 e 28 após a aplicação. A mensuração da fenda palpebral foi realizada também no olho contralateral que funcionou como controle. Resultados: O início do efeito clínico foi observado entre os dias 1 e 4 após a aplicação; a ptose máxima foi observada entre o quinto e o sétimo dia e a duração média de ação da toxina foi de 21 dias. O tempo máximo para recuperação da ptose foi de 28 dias. A porcentagem média de redução da fenda palpebral foi de 39,66% (16,55% ¿ 59,64%). A análise qualitativa demonstrou que duas gatas (20%) apresentaram cobertura corneal maior que 50%, sete gatas (70%) obtiveram cobertura corneal entre 25 e 49% e uma gata (10%) mostrou cobertura corneal menor que 25%. Os valores da pressão intraocular permaneceram dentro dos limites de normalidade. A toxina botulínica não causou efeitos adversos nos gatos desse estudo. Conclusão: O uso de toxina botulínica tipo A no músculo elevador da pálpebra superior foi seguro e promoveu ptose palpebral temporária parcial nos gatos desse experimento / Abstract: Purpose: To evaluate the effect and safety and of botulinum toxin A for the induction of palpebral ptosis in felines. Methods: In this prospective interventional study, a total of 10 cats underwent transpalpebral chemodenervation of levator palpebral superioris with 10 units of botulinum toxin type A in the left eye. The systemic changes, ocular mobility, visual function, intraocular pressure, and the onset, degree and duration of ptosis were evaluated before application, on a daily basis during the first seven days and on days 14, 21 and 28 after application.The palpebral edge of the contralateral eye was also measured. Results: A clinical effect was observed beginning between the first and fourth days after botulinum toxin A administration. The extent of ptosis was maximal between the fifth and seventh days after administration, and ptosis was observed for a mean duration of 21 days. The maximum time for recovery of ptosis was 28 days. The palpebral edge was reduced by an average of 39.6% (16.55% - 59.64%). Qualitative analysis showed that two cats (20%) had greater than 50% coverage corneal, seven cats (70%) achieved corneal coverage between 25 and 49% and one cat (10%) showed corneal coverage less than 25%. Intraocular pressure values were within normal limits. Botulinum toxin did not cause undesirable effects. Conclusions: The use of botulinum toxin A in the levator palpebrae superioris muscle was safe and provided transient, partial palpebral ptosis in all of the studied cats / Mestrado / Ciencias Biomedicas / Mestra em Ciências Médicas
236

Estudo do tempo de excreção renal através da cintilografia em felinos domésticos / Evaluation of renal excretion using scintigraphy in domestic cats

Georgea Bignardi Jarretta 04 August 2005 (has links)
Na rotina clínica de felinos domésticos, algumas modalidades de diagnóstico por imagem, como a ultra-sonografia, radiografia simples e urografia excretora, já são amplamente utilizadas. A cintilografia é uma técnica não invasiva, capaz de oferecer informações funcionais de rins individualmente, porém é considerada uma modalidade menos usual. O objetivo deste estudo foi determinar o tempo de excreção renal de felinos domésticos através da cintilografia, em animais com parâmetros ultra-sonográficos e radiográficos dentro dos limites da normalidade. Foram utilizados 15 animais, 9 machos e 6 fêmeas, e estes foram divididos em grupos de animais não submetidos à anestesia e anestesiados. Foi estabelecido o tempo para o radiofármaco obter acúmulo máximo em cada um dos rins e o tempo para este acúmulo máximo ser reduzido pela metade. Não houve diferença estatística entre os valores dos animais não-anestesiados e anestesiados, nem entre machos e fêmeas, tampouco entre os rins esquerdo e direito. / In internal medicine of domestic cats, imaging modalities, such as ultrasonography, radiography and intravenous pylogram are widely used. Scintigraphy is a non-invasive technique, which provides functional information of each individual kidney; however, it is not widely available or utilized currently in veterinary medicine. The aim of this study was to determine the time of excretion of each kidney in normal domestic cats using nuclear scintigraphy. Fifteen cats (9 males and 6 females) determined to be within normal limits for radiographic and ultrasonographic renal parameters, were divided into two experimental groups (awake and anesthetized cats). Time to maximum radiopharmaceutical activity (T max) and time to decline to half maximum radiopharmaceutical activity (half-time) were determined in each kidney for each cat. No statistical difference was found between groups (awake vs. anesthetized) or sex (males vs. females), or between left and right kidneys.
237

Underlying mechanisms and evolutionary roots of prosocial behaviors in non-human animals / ヒト以外の動物における向社会行動の基盤と進化

Bucher, Benoit Cyril Albert 27 July 2020 (has links)
京都大学 / 0048 / 新制・課程博士 / 博士(文学) / 甲第22680号 / 文博第843号 / 新制||文||694(附属図書館) / 京都大学大学院文学研究科行動文化学専攻 / (主査)准教授 黒島 妃香, 教授 Anderson James Russell, 教授 平田 聡 / 学位規則第4条第1項該当 / Doctor of Letters / Kyoto University / DGAM
238

Ecology and Conservation of Endangered Species in Sumatra: Smaller Cats and the Sumatran Rhinoceros (Dicerorhinus Sumatrensis) As Case Studies

Pusparini, Wulan 29 August 2014 (has links)
While we should celebrate the bicentennial of naming the Sumatran rhinoceros (SR), the only extant population on earth might be on the island of Sumatra. Since Strien's 1986 study in Mamas Valley, Leuser, very little more has been learned about how this species distributed and what factors are influencing its extirpation. This study is the first conducted in Sumatra at an Island-wide scale. Using hierarchical models, I estimate the occurrence rates (%) and indices of abundance of SR on three remaining population areas: Leuser Landscape (LL) in 2007 (2.77%, 26 (CI 12-61)), Way Kambas (WK) in 2008 (33.58%, 27 (CI 14-50)) and Bukit Barisan Selatan (BBS) in 2010 (36.4%, 31 (CI 19-66)). Primary dry land forest and rivers are factors affecting SR occurrence in LL, but the index of abundance also is affected by deforestation, roughness of terrain, and and a vegetation index. The index of abundance in WK is more affected by major roads, and brush and savannah cover types, and the occurrence there is additionally affected by deforestation. Secondary dry land forest, regular roads, and deforestation is affecting both the occurrence rate and index of abundance of SR in BBS. The identification of these environmental and disturbance factors is translated into spatially explicit map that can be used to update the IUCN distribution map. In LL, by comparison to the historical distribution based on Strien (1986), the small population in Bendahara Mountain might still persist outside the core population in Mamas Valley.
239

Evaluación del desempeño de los cats en las tronaduras de escondida

Navarro Ramos, Sergio Enrique January 2012 (has links)
Ingeniero Civil en Minas / El trabajo realizado consistió en evaluar el desempeño de los "conos activadores de tacos" (CATs), dispositivo desarrollado por el autor, para mejorar la capacidad de soporte de los "tacos" en una tronadura. Con este propósito, a partir de la información obtenida de pruebas realizadas por Minera Escondida, se compararon estos resultados utilizando como caso base el correspondiente a una tronadura convencional. En el actual estado de la técnica, la evaluación del desempeño de las tronaduras se realiza comparando las distribuciones granulométricas obtenidas en la operación de fragmentación. Ello resulta insuficiente, ya que sólo considera la información de entrada y de salida, sin tomar en cuenta sus procesos. En el presente trabajo, para superar esta limitación, se desarrolló y aplicó un modelo del comportamiento de las tronaduras basado en el desplazamiento de los tacos durante el tiempo de proceso. Su aplicación permitió correlacionar las distribuciones de fragmentación medidas en terreno con los niveles de "energía efectiva" disponible, en función del comportamiento de los "tacos". El modelo desarrollado requirió para su conceptualización de algunos supuestos, siendo los más relevantes los que se indican a continuación: Los sistemas explosivo-roca pierden energía al exterior debido, solamente, a la expansión de la cámara que contiene los gases generados por de la detonación del explosivo. El trabajo de fragmentación de la roca es proporcional a la "energía efectiva total" disponible. Las pérdidas de energía se van dan dando a medida que avanza el frente de quiebre. Los resultados teóricos, en cuanto a la energía efectiva total entregada por el modelo, indicaron una buena correlación con los tamaños característicos de las distribuciones de fragmentación medidas en terreno. Esto avala al modelo como una herramienta promisoria para evaluar el desempeño de las tronaduras, pero se requiere contar con mediciones reales del desplazamiento de los tacos, en cada caso, para definir totalmente la situación modelada. Con las reservas debidas a la calidad, cantidad y confiabilidad de la información disponible para este trabajo, se pudo concluir, a partir de un ejercicio teórico realizado con una de las tronaduras de prueba suponiendo condiciones de entrada similares que la "energía efectiva total" disponible en las tronaduras con activadores "CATs" supera en una cifra del orden de un 35 % a la del caso base. Asimismo, se puede inferir un 25 % de menor consumo de explosivo, disponiendo de la misma "energía efectiva total". Las ventajas técnicas y económicas detectadas en las pruebas con "conos activadores de tacos" (CATs), los convierte en una herramienta eficaz para mejorar el desempeño de las operaciones de tronadura.
240

Feline hyperthyroidism in Hong Kong : prevalence and risk factors

De Wet, Cornelia Susanna 23 February 2009 (has links)
Feline hyperthyroidism is an important disorder in middle-aged and older cats. The cause and pathogenesis of the disease is still unknown and there are few published incidence rates or prevalence estimates. A descriptive cross-sectional study was conducted to determine the prevalence of and potential risk factors for feline hyperthyroidism in Hong Kong. Serum thyroxine (T4) was measured in 305 cats 10 years and older that presented at various veterinary clinics in Hong Kong between June 2006 and August 2007. The veterinarians taking the samples completed a questionnaire regarding the health of each cat. Each owner completed a questionnaire regarding vaccination history, internal and external parasite control, diet and the environment of their cat. Serum total T4 concentration was determined by use of a commercially available radioimmunoassay kit (Coat-a-count®, DPC®). For total T4 the feline reference interval was 12.8-50.0 nmol/L (1.0-3.9 ug/dL). All cats with a serum total T4 concentration of greater than 50.0 nmol/L were classified as hyperthyroid. Alanine aminotransferase (ALT) and alkaline phosphatase (ALP) activities were measured in all the samples. The prevalence of feline hyperthyroidism in Hong Kong was estimated at 3.93% (95% CI : 2.05-6.77) and there was no significant difference in prevalence between healthy (3.16%) and sick (4.37%) cats. This demonstrates that although this disease is present in Hong Kong, the prevalence is lower than the reported prevalence in other parts of the world. Risk factors that were examined included age, sex, breed, number of cats in household, vaccinations, parasite control, indoor environment, type of diet and type of water. Risk factors for hyperthyroidism identified by multivariate analysis were age and breed. Affected cats were more likely to be older (>15 years) and domestic shorthair cats were less likely to be diagnosed with hyperthyroidism than the other breeds combined. There was no statistically significant relationship between sex, vaccinations, parasite control or indoor environment and the development of hyperthyroidism. There was also no statistically significant relationship between the consumption of a canned food diet by the cats and hyperthyroidism. There were no characteristic clinical features amongst the cats that were hyperthyroid and only one cat exhibited the typical clinical syndrome of ravenous appetite with severe weight loss. The lack of distinctive clinical signs could be due to the presence of a mild or early form of the disease, but can also be due to an atypical form of the disease. This study showed that the disease needs to be considered if any of the following factors are present in an older cat : polyphagia, diarrhoea, and a significant raise in ALT and ALP activities. This study concluded that the prevalence of hyperthyroidism in cats in Hong Kong is less than in most other parts of the world, despite the presence of previously identified risk factors. Comparative epidemiological studies will be necessary to compare the presence of possible risk factors between feline populations in Hong Kong and elsewhere. / Dissertation (MSc)--University of Pretoria, 2008. / Companion Animal Clinical Studies / unrestricted

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