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1
Campos, Maria Margarida Rosmaninho Falcão de. "Pesquisa de parasitas gastrointestinais em Mustela putorius furo (furão-doméstico)." Master's thesis, Universidade de Lisboa, Faculdade de Medicina Veterinária, 2021. http://hdl.handle.net/10400.5/21323.
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Dissertação de Mestrado Integrado em Medicina VeterináriaRESUMO - A popularidade do furão doméstico (Mustela putorius furo) como animal de companhia tem tido, recentemente, um aumento significativo, devido à sua personalidade amistosa, ao reduzido tamanho, às relativas facilidades de maneio e simplicidade dos cuidados indispensáveis para o bem-estar da espécie. Neste contexto, e face à proximidade e contacto que os furões proporcionam aos proprietários, foi realizado um estudo de parasitas gastrointestinais nos animais que se apresentaram nas clínicas na região de Lisboa e do Porto. Foram colhidas e analisadas 19 amostras de 29 indivíduos, utilizando métodos coprológicos de flutuação, sedimentação e esfregaço fecal. Não foram detetadas formas parasitárias em quaisquer das 19 amostras examinadas. Com base na literatura disponível, este será o primeiro estudo parasitológico realizado em furões domésticos em Portugal. Os resultados deste estudo parasitológico demonstram uma ausência de provas para uma elevada fauna parasitológica presente nestes hospedeiros. Tal é devido, possivelmente, a uma conjunção dos seguintes fatores: o maneio assíduo por parte dos proprietários, a escassez no acesso ao meio exterior dos respetivos fogos habitacionais; e a resistência natural que possuem a parasitismo interno. Contudo, é de salientar a necessidade de estudos mais extensos sobre a fauna parasitológica destes animais para eventual corroboração dos nossos resultados, de modo a ilustrar em profundidade o verdadeiro impacto da mesma na Saúde Pública e Animal.
ABSTRACT - GASTROINTESTINAL PARASITES SCREENING IN Mustela putorius furo (DOMESTIC FERRET) - The popularity of the domestic ferret (Mustela putorius furo) as a pet has seen a significant increase in the past few years: This trend is due to the ferret’s friendly personality, small size, also to the relative easiness in handling, and the simplicity of care required for the species’ wellbeing. On account of the proximity and contact between owners and pets, a screening for gastrointestinal parasites was undertaken for all ferrets that showed up at the clinics in the region of Lisbon and Porto. Overall, 19 samples from 29 individuals were collected and analyzed through coprological techniques, such as flotation, sedimentation and fecal smears. No parasitic forms were detected on any of the 19 samples tested. According to the available literature, this is the first parasitological study performed in domestic ferrets in Portugal, which outcome has shown a lack of evidence for a high parasitological fauna of these hosts. This is arguably due to a conjunction of factors, namely the following: diligent husbandry from the owners, the absence of access to the outside of their homes, or the natural resistance of the host to internal parasites. However, additional studies about the parasitological fauna of these animals are required to further validate our present findings, as well as to illustrate its true impact in Public and Animal Health.
N/A
2
Newbold, Haylie Goldene. "Infra-red vision in ferrets (Mustela furo)." The University of Waikato, 2007. http://hdl.handle.net/10289/2357.
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Ferrets are labelled Unwanted Organisms under the Biosecurity Act (1993) due to their predation on New Zealand's native protected species and their status as potential vectors of Bovine Tuberculosis. There was suspicion that ferrets could detect the infrared light-emitting equipment used to monitor predator and prey behaviour. A two-alternative forced-choice operant procedure was used to test whether five pigmented male ferrets could detect infrared (870 and 920 nm) light. First, the ferrets were taught to press a lever under a lit visible (white) light emitting diode (LED) for food rewards. After up to 101 40-minute sessions, each ferret could lever press under the lit-light at or above the pass criteria of 75% responses over four consecutive (or five out of six) sessions. The same ferrets were then tested for stimulus generalisation over different stimulus properties by changing the wavelength/colour and intensity of the lit-light. The overall mean accuracy of each ferret's response to each coloured light varied between 92% and 84%. When a red light was systematically dimmed to halve the intensity nine times, all five ferrets still met the set pass criteria with overall accuracies of between 88% and 78%. This indicated that changing the properties of the light stimuli would not disrupt the ferrets' abilities to perform the learned task. This test was a necessary prerequisite before changing the light stimuli to potentially invisible wavelengths in the infrared spectrum. The light stimulus was changed to a single infrared (870) nm LED. Two of five ferrets showed strong evidence (response accuracies of 77% 4 and 72% 2) and one ferret showed weak evidence (60% 3) that they could see the light at this wavelength. Extraneous cues such as ultrasound emitted at the onset of a stimulus light or a predictable schedule of reinforcement were eliminated as potential response cues. These tests helped to prove that the ferrets were using only the light stimulus to discriminate which stimulus was lit. It may be possible that at least some feral ferrets can detect the light produced from infrared monitoring equipment that emits light wavelengths at or below 870 nm. This has significant implications for conservation because infrared equipment is used by conservation agencies in New Zealand and overseas to monitor predator and prey behaviour in the wild. If the infrared lighting is detected by the subject being observed, then it may potentially influence the behaviour of the animal, or attract a predator towards threatened native species.
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Lebas, Maud Ducos de Lahitte Jacques. "Atlas radiographique du furet (Mustela putorius furo)." [S.l.] : [s.n.], 2008. http://oatao.univ-toulouse.fr/2080/1/debouch_2080.pdf.
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Frings, Barbara. "Abdominale Sonographie beim Frettchen (Mustela putorius f. furo L. 1758)." Diss., [S.l.] : [s.n.], 2004. http://edoc.ub.uni-muenchen.de/archive/00002648.
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Riechert, Maren. "Untersuchungen ausgewählter Nierenkrankheiten beim Frettchen (Mustela putorius f. furo L. 1758)." Diss., lmu, 2005. http://nbn-resolving.de/urn:nbn:de:bvb:19-46412.
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Leclerc, Serge Simon. "Organization of the somatosensory cortex in the ferret (Mustela putorius furo)." Thesis, McGill University, 1987. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=63830.
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Gorgas, Daniela. "Sonographische Untersuchungen der Nieren beim Frettchen (Mustela putorius f. furo L. 1758)." Diss., lmu, 2004. http://nbn-resolving.de/urn:nbn:de:bvb:19-26490.
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Schernthaner, Anita Veronika Hildegard. "Etablierung einer Medetomidin-Midazolam-Ketamin-Kombinationsanästhesie für das Frettchen (Mustela putorius furo)." Diss., lmu, 2011. http://nbn-resolving.de/urn:nbn:de:bvb:19-127689.
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Coleman, Leslie Ann. "Immunophenotypic characterization of lymphoid tissue and lymphoproliferative disease in ferrets (Mustela putorious furo)." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/43442.
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Morley, Craig Gordon. "The ecology and behaviour of feral ferrets (Mustela furo) in Canterbury farmland, New Zealand." Thesis, University of Canterbury. Zoology, 1999. http://hdl.handle.net/10092/5824.
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Ferret (Mustela furo) control programs, especially those attempting to prevent the spread of Mycobacterium bovis (Tb), would greatly benefit from practical knowledge of ferret ecology and behaviour. This study had two main objectives: firstly, to investigate ferret ecology by examining ferret abundance, survival, trapping success, and diet; and, secondly, to investigate ferret behaviour and activity patterns by using an acoustically sensitive transmitter system (ASTS). Abundance and survival estimates of ferrets tagged with passive integrated transponders (PITs), showed a marked seasonal variation, and despite ferrets being controlled on one site, data from both sites showed that lagomorph numbers increased exponentially. A trapping success model (GLIM) showed that factors such as vegetation cover, rabbit sign, and animal tracks positively influenced capture rates. Although GPS technology provided accurate trap location data, trapping success also benefited from understanding the distribution signs of both predators and prey. GPS data further contributed to GIS models of animal movements, home range and site fidelity. As a result, trapping success was found to be affected by periods of low ferret abundance, fluctuations in trappability and possibly excess prey. It was found that, even though cats and ferrets use different hunting strategies, lagomorphs were their staple prey in North Canterbury. Unlike overseas habitats, New Zealand farmland lacks alternative suitable prey and this may explain the narrow diet of both predators. Even with the large increase in lagomorph numbers seen in North Canterbury in the second year of study, the diets of both predators remained the same, suggesting that these predators are unable to regulate lagomorphs once their numbers cross a certain threshold. By using ASTS technology to examine ferret behaviour and activity it was possible to identify a wider range of behaviours than previously documented using conventional radio tracking techniques. Despite using only one ferret, it was not only possible to document the time of an activity period, the length of each behaviour, as well as seasonal changes in activity, but also behaviours rarely recorded by researchers using more conventional techniques. Generally the ferret displayed an ultradian activity pattern, disputing the accepted nocturnal hypothesis. One implication for ferret control programs using baited traps was a documented decrease in eating behaviour during the breeding seasons. Nevertheless, this study provided as many questions as it did answers; however, with technology such as ASTS, further information about the behaviour and ecology of ferrets could advance future ferret control programs.
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Castillo, Alesha Bernedette. "The female ferret (Mustela putorius furo) as an in vivo model for skeletal research /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2004. http://uclibs.org/PID/11984.
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Fuster, Roca Maria Antonia. "La fura (Mustela putorius furo) com a model experimental per a l'estudi dels efectes del b-carotè en obesitat i càncer." Doctoral thesis, Universitat de les Illes Balears, 2009. http://hdl.handle.net/10803/9383.
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Existeix certa controvèrsia sobre els efectes del b-carotè com a promotor o protector del càncer de pulmó. A més, el b-carotè, com a precursor de l'àcid retinoic, podria estimular la termogènesi i regular l'adipositat corporal. La fura representa un bon model per estudiar els efectes de la ingesta de b-carotè ja que l'absorbeix de manera pràcticament intacta (semblant als humans). Hem demostrat que el b-carotè ingerit amb altres antioxidants no sembla tenir efectes inductors del càncer ja que no augmenta la proliferació cel·lular al pulmó i a més prevé els efectes del carcinogen benzo[a]pirè. D'altra banda, dosis farmacològiques de b-carotè fan a la fura efectes contraris als de l'àcid retinoic, ja que augmenten l'adipositat i resulten en una menor capacitat termogènica, principalment al teixit adipós retroperitoneal que, a la fura, presenta certes característiques de teixit adipós marró, ja que té un percentatge considerable d'adipòcits multiloculars i expressa quantitats significatives d'UCP1.Existe controversia sobre los efectos del b-caroteno como promotor o protector del cáncer de pulmón. Además, el b-caroteno, como precursor del ácido retinoico, podría estimular la termogénesis y regular la adiposidad corporal. El hurón representa un buen modelo para estudiar los efectos de la ingesta de b-caroteno pues lo absorbe de manera prácticamente intacta (similar a los humanos). Hemos demostrado que el b-caroteno ingerido con otros antioxidantes no parece tener efectos inductores del cáncer puesto que no aumenta la proliferación celular del pulmón y además previene los efectos del carcinógeno benzo[a]pireno. Por otra parte, dosis farmacológicas de b-caroteno producen en el hurón efectos contrarios a los del ácido retinoico, ya que aumentan la adiposidad y reducen la capacidad termogénica, principalmente del tejido adiposo retroperitoneal que, en el hurón, presenta ciertas características de tejido adiposo marrón, al contener un porcentaje considerable de adipocitos multiloculares y expresar cantidades significativas de UCP1.
The effects of b-carotene promoting or protecting against lung cancer are unclear. Furthermore, b-carotene, as retinoic acid precursor, could induce thermogenesis and regulate body adiposity. The ferret represents a good model to study the effects of oral administration of b-carotene because it absorbs it almost intact (similarly to humans). We have shown that the intake of b-carotene together with other antioxidants does not seem to induce
cancer as it does not increase cellular proliferation in lung and prevents the effects of the carcinogen benzo[a]pyrene. In addition, pharmacological b-carotene doses in ferrets have different effects from retinoic acid, increasing adiposity and decreasing thermogenic capacity, especially in the retroperitoneal adipose tissue which, in ferrets, resembles brown adipose tissue, since it has an important percentage of multilocular adipocytes and expresses significant amount of UCP1.
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Caley, Peter, and n/a. "Inference on the host status of feral ferrets (Mustela furo) in New Zealand for Mycobacterium bovis infection." University of Canberra. Resource, Environment & Heritage Studies, 2001. http://erl.canberra.edu.au./public/adt-AUC20050621.140940.
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This thesis is about making inference on the host status of feral ferrets in New
Zealand for Mycobacterium bovis, the aetiological agent of bovine tuberculosis. The
central question addressed is whether the rate of intra-specific transmission of M. bovis
among ferrets is sufficient for the disease to persist in ferret populations in the absence
of external, non-ferret sources of infection (inter-specific transmission). The question is
tackled in three parts�firstly using model selection to identify suitable models for
estimating the force of M. bovis infection in ferret populations; secondly applying
statistical hypothesis testing to the results of planned manipulative field experiments to
test the relationship between M. bovis infection in brushtail possums and that in ferrets;
and thirdly using modelling to estimate intra-specific disease transmission rates and the
basic reproductive rate (Ro) of M. bovis infection in ferrets.
The model selection approach clearly identified the hypothesis of oral infection
related to diet was, as modelled by a constant force of infection from the age of
weaning, the best approximation of how M. bovis infection was transmitted to ferrets.
No other form of transmission (e.g., during fighting, mating, or routine social
interaction) was supported in comparison. The force of infection (λ) ranged from 0.14
yr-1 to 5.77 yr-1, and was significantly higher (2.2 times) in male than female ferrets.
Statistical hypothesis testing revealed transmission of M. bovis to ferrets
occurred from both brushtail possums and ferrets. The force of M. bovis infection in
ferrets was reduced by 88% (λ=0.3 yr-1 vs. λ=2.5 yr-1) at sites with reductions in the
population density of sympatric brushtail possum populations. A smaller decline in the
force of infection resulting from the lethal cross-sectional sampling of the ferret
populations was also demonstrated.
The modelling approach estimated the basic reproductive rate (Ro) of M. bovis
infection in ferrets in New Zealand to vary from 0.17 at the lowest population density
(0.5 km-2) recorded to 1.6 at the highest population density (3.4 km-2) recorded. The
estimates of Ro were moderately imprecise, with a coefficient of variation of 76%.
Despite this imprecision, the Ro for M. bovis infection in ferrets was significantly less
than unity for all North Island sites surveyed. Hence it is inferred ferrets are spillover
hosts (0
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Cunha, Marilisa de Sousa. "Avaliação Doppler da hemodinâmica na veia porta e veia cava caudal em Mustela putorius furo : estudo preliminar para definição de valores de referência." Master's thesis, Universidade de Lisboa. Faculdade de Medicina Veterinária, 2015. http://hdl.handle.net/10400.5/8440.
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Dissertação de Mestrado Integrado em Medicina VeterináriaA ultrassonografia duplex é actualmente o exame diagnóstico de eleição na avaliação da anatomia vascular e dinâmica de perfusão sanguínea. Em medicina veterinária a sua aplicação assume cada vez maior expressão, sobretudo nas espécies canina e felina. A progressiva popularidade do furão (Mustela putorius furo) como animal de companhia e a procura de cuidados médicos especializados potenciou a evolução da medicina. Até à data não existem registos da aplicação desta técnica no estudo de vasos sanguíneos nesta espécie. A inexistência de valores de referência limita o potencial diagnóstico. O principal objectivo deste estudo foi definir valores de referência para parâmetros hemodinâmicos na veia porta e cava caudal do furão, através do exame Doppler espectral sob anestesia com isoflurano. Pretendeu-se também avaliar qualitativamente o fluxo sanguíneo nestes vasos. O exame foi realizado na porta hepatis e a análise quantitativa envolveu o diâmetro (D), velocidade média (VF), fluxo sanguíneo médio (FS), índice de pulsatilidade (IP) e índice de congestão (IC). No total observaram-se 32 animais (16 fêmeas e 16 machos); um furão foi excluído devido a marcada replecção gástrica. O grupo A (n=17) incluiu animais clinicamente saudáveis e constituiu o grupo controlo. O grupo B (n=14) reuniu animais com patologia clinicamente comprovada. Devido a critérios de inclusão, a avaliação portal baseou-se apenas em 15 animais no grupo A e 13 no grupo B. No grupo controlo, observou-se fluxo uniformemente anterógrado na veia porta. O traçado espectral foi contínuo (padrão monofásico) com ligeiras oscilações respiratórias. Na veia cava caudal observou-se fluxo uniformemente anterógrado ligeira a marcadamente pulsátil e com pequenas oscilações associadas ao ciclo respiratório. Apenas um animal apresentou fluxo retrógrado no centro do vaso. Com base nos valores obtidos no grupo controlo calcularam-se os valores de referência (IC 95%). Na veia porta: D – 0.31-0.51 cm; VF – 14.30-24.97 cm/seg; FS – 1.50-5.92 ml/min/kg; IP – 0.12-0.28 cm/s; IC – 0-0.01 cm×s. Na veia cava caudal: D – 0.16 – 0.34 cm; VF – 13.42-30.42 cm/s; FS – 0.43-1.38 ml/min/kg; IP – 0.11-0.46 cm/s; IC – 0-0.01 cm×s. A comparação entre grupo A e B revelou diferença estatisticamente significativa do IP para ambas as veias (P=0,029 e P=0,032, respectivamente). Este projecto pioneiro disponibiliza novas informações sobre a biologia do furão e estabelece o ponto de partida para futuras investigações.
ABSTRACT - DOPPLER HAEMODYNAMIC EVALUATION OF PORTAL AND CAUDAL VENA CAVA IN MUSTELA PUTORIUS FURO: PRELIMINARY STUDY TO ESTABLISH REFERENCE VALUES - Duplex ultrasonography is currently the gold standard exam on vascular anatomy and haemodynamics. This technique has been increasingly used in veterinary medicine, particularly in cat and dog medicine. Ferret (Mustela putorius furo) medicine has been progressively evolving due to the rising popularity as a pet and the demand for specialized medical care. However, records of duplex ultrasonography examination of ferret’s blood vessels are inexistent. The lack of reference values limits its potencial as a diagnostic tool. The principal aim of the current study was to establish reference values for hemodynamic parameters of portal and caudal vena cava of ferrets. These parameters were measured with spectral Doppler in ferrets under isoflurane anaesthesia. It was also intended to qualitatively evaluate blood flow. All exams were performed at porta hepatis and the quantitative analysis included: diameter (D), median velocity (FV), median blood flow (BF), pulsatile (PI) and congestive index (CI). Thirty two animals were examined (16 hobs and 16 jills). One ferret was excluded owing to a marked increase in stomach volume. Group A (n=17) was the control group and included clinically healthy animals. Group B (n=14) was formed by clinically unhealthy animals. Due to inclusion criteria, portal vein exam included only 15 ferrets in group A and 13 in group B. The portal vein blood flow in group A was uniformly anterograde. The spectral waveform was continuous (monofasic pattern) with mildly respiratory oscillations. The caudal vena cava blood had a similar type flow but lightly to heavily pulsatile. The only exception was a ferret with retrograde flow in the center of the vein. The reference values of quantitative parameters were calculated from control group data with a CL of 95%. Portal vein normal values were: D – 0.31-0.51 cm; FV – 14,30-24,97 cm/seg; BF – 1,50-5,92 ml/min/kg; IP – 0,12-0,28 cm/s; IC – 0-0,01 cm×s. Caudal vena cava reference values were: D – 0.16 – 0.34 cm; FV – 13,42-30,42 cm/s; BF – 0,43-1,38 ml/min/kg; IP – 0,11-0,46 cm/s; IC – 0-0,01 cm×s. The haemodynamic parameters under evaluation were compared between group A and B. IP was statistically different between these two groups in portal (P=0,029) and caudal cava vein (P=0,032). This pioneer project gives new biological information on the ferret and is the beginning of future investigations in the field.
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Hitz, Sherri Lynn 1970. "Postnatal development of brainstem cholinergic inputs to the dorsal lateral geniculate nucleus of the domesticated ferret, Mustela putorius furo." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/9676.
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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Brain and Cognitive Sciences, 1998.Includes bibliographical references (p. 45-46).
The ferret dorsal lateral geniculate nucleus (dLGN) undergoes two periods of retinal afferent segregation during postnatal development. The first establishes the eye-specific laminae, A and A 1, and the second establishes ON/OFF sublaminae within laminae A and At. In contrast to eyespecific segregation, which seems to rely only on presynaptic activity, ON /OFF sublamination requires both pre- and postsynaptic activity. Because of its dependence on postsynaptic (relay cell) activity, sub lamination may be influenced by extra retinal inputs which alter relay cell excitability. We have examined the postnatal development of cholinergic brainstem inputs to the dLGN to determine whether these inputs arrive in time to influence sublamination and whether the cholinergic innervation is present in laminar zones (i.e., whether it might target relay cells). Choline acetyltransferase (ChA1) immunoreactivity is not detected in the dLGN until a few days after the second postnatal week Gust after sublamination begins), at which time it can be seen in both A and C laminae. ChA T labeling increases in intensity until two days before the end of the fourth postnatal week (when ON/OFF sublamination is complete), when it drops dramatically throughout the dLGN . ChAT labeling returns a few days later, but appears in the interlaminar and intersublaminar zones instead of within the A and C laminae. However, the pattern of ChA T labeling reverses once more, so that in the adult, ChA T labeling appears in the A and C laminae and is relatively absent from interlaminar zones. Acetylcholinesterase (AChE) labeling in the dLGN shows a similar ontogenetic pattern and time course. Retrngrade labeling of brainstem cholinergic nuclei demonstrates that these inputs are in place in the dLGN after the second postnatal week. Thus, cholinergic inputs to A and A 1 laminae of the ferret dLG N do arrive in time to influence ON/OFF sublamination.
by Sherri Lynn Hitz.
S.M.
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Berzins, Rachel. "Evolution ontogénétique des relations interindividuelles et importance de l'olfaction dans le maintien de l'organisation sociale chez le furet (Mustela furo)." Angers, 2005. http://www.theses.fr/2005ANGE0001.
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Les modalités de l'organisation sociale des carnivores solitaires sont mal connues. Le but de cette recherche est d'identifier les mécanismes proximaux responsables de l'adoption et du maintien d'un mode de vie solitaire chez les petits mustélidés avec pour modèle d'étude, le furet (Mustela furo). Afin d'évaluer l'influence du sexe, de l'âge et de la présence de la mère sur le comportement des furets, une étude détaillée de l'évolution ontogénétique des relations interindividuelles au sein de portées a été menée de leur naissance à leur dispersion. L'analyse de leur distribution spatiale au sein de grands enclos a mis en évidence l'absence d'affinités préférentielles aussi bien entre les jeunes qu'entre la mère et ses jeunes mais aussi son rôle de cohésion. Ces observations révèlent une forte tolérance et une absence d'agressivité mais aussi la faiblesse du lien social au sein des portées. L'augmentation de la distance entre les mâles en période de dispersion laisse aussi supposer l'existence d'un déclic ontogénétique. L'étude des capacités de discrimination olfactive des furets a démontré, via un procédé d'habituation-discrimination, que les furets sont capables de discriminer le marquage anal d'un individu familier d'un individu non familier. Cette capacité pourrait notamment être utilisée par les femelles qui préfèrent la proximité de mâles olfactivement familiers en période de reproduction. En effet, l'étude du comportement des furets envers des congénères familiers et non familiers a mis en évidence, qu'après une période d'isolement, les femelles se montrent plus agressives que les mâles à l'égard de congénères non familiers de même sexe. La synthèse de ces travaux montre que l'organisation sociale des petits mustélidés serait dépendante de facteurs phylogénétiques et écologiques, la période d'isolement consécutive à la dispersion se présentant comme une phase clé dans la modification des relations interindividuelles entre l'âge juvénile et l'âge adulteSocial organization modalities of solitary carnivores are not well known. The aim of this study is to identify proximate mechanisms responsible for the adoption and maintenance of a solitary life in small mustelids, using the ferret (Mustela furo) as a model. To assess the influence of sex, age and mother presence on ferret behavior, a detailed study of the ontogenetic evolution of interindividual relationships within litter has been completed from their birth through their dispersion. The analysis of their spatial distribution inside large enclosures demonstrated an absence of preferential affinities between young just as well between mother and young, but also her cohesive role. These observations have revealed a strong tolerance and an absence of aggressiveness but also the weakness of social bond within litters. The increase of distances between males during dispersal period let also suppose the existence of an ontogenetic switch. The study of the olfactory discrimination abilities of ferret by a habituation discrimination procedure has demonstrated that ferrets are able to discriminate the anal odor of a familiar individual from an unfamiliar one. Females who prefer proximity of olfactory familiar male could use this ability during the breeding period. Indeed, the study of ferret behavior towards familiar and unfamiliar conspecifics has demonstrated, after an isolation period, that females are more aggressive than males towards same-sex unfamiliar conspecifics. The synthesis of these experiments shows that the social organization of small mustelids is dependant of phylogenetic and ecological factors, with the isolation period following dispersal being a key phase in the modification of interindividual relationships between juvenile and adult age
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Santos, Joana Cuba Macedo dos. "Insulinoma em furões." Master's thesis, Universidade de Lisboa. Faculdade de Medicina Veterinária, 2016. http://hdl.handle.net/10400.5/11732.
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Dissertação de Mestrado Integrado em Medicina Veterináriajoana.cmds@gmail.com
Os primeiros casos de insulinoma no furão (Mustela putorius furo) aparecem documentados na literatura nos anos 80, sendo hoje em dia uma das neoplasias mais diagnosticadas nesta espécie. A neoplasia das células Beta dos ilhéus pancreáticos, mais frequentemente designada por insulinoma, produz os seus efeitos através da hipersecreção de insulina e é a hipoglicémia resultante que acaba por se traduzir numa variedade de sinais clínicos. Este estudo descreve a apresentação clínica, o diagnóstico, as opções terapêuticas e o prognóstico do insulinoma, dada a relevância clínica desta patologia no furão doméstico. Foram seguidos 10 casos durante o período de estágio curricular, que pretendem ser um reflexo daquilo que pode ser encontrado na prática clínica. Os sinais clínicos predominantes na amostra foram a perda de peso, apatia, vómito e ptialismo (n=7), sendo a apresentação crónica, com desenvolvimento lento de sinais ao longo de semanas ou meses, a mais observada (n=6). O diagnóstico foi obtido presuntivamente na maior parte dos casos, pois a confirmação histopatológica só foi possível em 3 animais. A determinação da concentração da glucose sanguínea com o glucómetro e a ecografia abdominal foram os exames complementares que se revelaram mais valiosos para o diagnóstico. A maioria dos furões (n=8) recebeu um tratamento combinado, médico e cirúrgico. O tratamento médico consistiu sobretudo na administração de glucocorticoides (prednisona) com adição de diazóxido, e o tratamento cirúrgico baseou-se na execução de pancreatectomia parcial. Quatro animais tornaram-se euglicémicos imediatamente após a pancreatectomia, outros quatro passaram para um estado hiperglicémico com necessidade de insulinoterapia e um permaneceu hipoglicémico. Nos animais que demonstraram recidiva de sinais clínicos durante o período de seguimento (n=7), o tempo até recidiva foi, em média, de 181 dias. A eutanásia foi por duas vezes o último recurso, por agravamento do quadro de insulinoma. Por fim, e uma vez que o comportamento biológico do insulinoma no furão difere do de outras espécies, foram também discutidos alguns aspetos comparativamente ao insulinoma no cão.
ABSTRACT - Insulinoma in ferrets - The first reports of insulinoma in ferrets (Mustela putorius furo) began appearing in the literature in the 1980s, and this is now one of the most common neoplastic disease diagnosed in this species. Pancreatic islet beta cell tumors, more commonly known as insulinomas, oversecrete insulin which results in hypoglycemia, causing the wide variety of clinical signs present in this condition. This study describes the clinical presentation, diagnosis, treatment options and prognosis of insulinoma, given the clinical relevance of this condition in the ferret. Ten cases were observed during the curricular internship, and their purpose is to mirror what can be found in a clinical environment on a daily basis. The most common clinical signs were weight loss, apathy, vomiting and ptyalism (n=7), with a chronic onset over the course of weeks or months (n=6). A tentative diagnosis was made in most cases, because histological confirmation was possible in only 3 cases. Measurement of blood glucose concentration with a portable blood glucose meter and abdominal ultrasonography appeared to be the most valuable diagnostic procedures. Most ferrets (n=8) were treated medically and surgically. Medical management consisted of glucocorticoids administration (prednisone) combined with diazoxide, and partial pancreatectomy was performed as surgical therapy. Four pacients became euglycemic in the immediate postoperative period, four others developed postoperative hyperglycemia and required insulin injections, and one remained hypoglycemic. The mean disease-free interval was 181 days, in those cases where recurrence of clinical signs was observed during the follow-up period (n=7). Two ferrets were euthanized due to worsening of the disease. Finally, and once the biological behavior of insulinoma in ferrets is different than that in other species, some comparative aspects of the canine insulinoma were also briefly discussed.
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Vieira, Marta Maria Ferreira dos Santos Leite. "Linfoma canino e em espécies exóticas." Bachelor's thesis, Universidade Técnica de Lisboa. Faculdade de Medicina Veterinária, 2008. http://hdl.handle.net/10400.5/989.
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Dissertação de Mestrado Integrado em Medicina VeterináriaO linfoma, linfoma maligno ou linfossarcoma é uma neoplasia hematopoiética maligna com origem em células linforeticulares localizando-se inicialmente em órgãos linfóides como os linfonodos, o fígado ou o baço. Afecta a maior partes das espécies domésticas, incluindo animais exóticos. A sua etiologia é multifactorial pois pensa-se que exista a influência de factores genéticos, ambientais, alimentares (Moore, 2007) e de vírus oncogénicos no caso dos gatos (FeLV) (Morrison, 2007) e dos galináceos (Vírus da Doença de Marek) (Harrisson & Lightfoot, 2006). O diagnóstico definitivo de linfoma pode ser feito por punção aspirativa de agulha fina (PAAF) mas o gold standard para diagnóstico é a biopsia excisonal de um linfonodo, preferencialmente o poplíteo (Moore, 2005). O linfoma pode ser classificado em termos anatómicos, citológicos, histológicos, e imunohistoquímicos. O seu estadiamento deve ser efectuado pois ajuda na escolha do protocolo de quimioterapia e em termos de prognóstico. Existem inúmeros protocolos de quimioterapia descritos para o tratamento do linfoma nas diferentes espécies. No entanto, na generalidade estes dividem-se em protocolos de agente único ou protocolos combinados. A maioria compreende uma fase de indução da remissão e uma fase de manutenção. Quando o animal manifesta resistência a um determinado protocolo este deve ser mudado para um que utilize agentes com diferentes mecanismos de acção para que se reinduza a remissão. Qualquer que seja o tratamento preconizado, em qualquer espécie, o objectivo fundamental não é a cura mas o aumento do tempo de vida com qualidade. Associados ao linfoma podem coexistir síndromes paraneoplásicas como a caquexia e a hipercalcémia, com a primeira a ser comum em todas as espécies animais. Para tentar travar a caquexia, o animal deve ser alimentado com dietas ricas em gorduras e proteínas e com baixo teor de hidratos de carbono pois estes últimos são usados pelo tumor de forma mais eficiente para produzir energia. Para finalizar são apresentados três casos clínicos em diferentes espécies: cão (Canis lupus familiaris), furão (Mustela putorius furo) e papagaio cinzento (Psittacus erithacus congolensis).
ABSTRACT - Canine lymphoma and lymphoma in exotic species The lymphoma (malignant lymphoma or lymphossarcoma) are a common hematopoietic neoplasm with origin in the lymphoreticular system and initially found in lymphoid organs like lymph nodes, liver or spleen. It affects the majority of domestic species, including exotic animals. It has multifactorial aetiology as its development and progression suffers the influence of genetic, environmental and alimentary factors, in addition to oncogenic viruses in cats (FeLV) (Morrison, 2007) and chickens (Marek’s disease virus) (Harrisson & Lightfoot, 2006). Definitive diagnosis of lymphoma can be achieved by fine needle aspirate cytology. However, the gold standard for its diagnosis remains excisional biopsy of a lymph node, preferably from popliteal lymph node (Moore, 2005). Lymphoma can be classified accordingly to its anatomical localization and cytological, histological or imunohistochemical analysis. It is essential to conduct an appropriate staging of the disease, in order to help choosing the chemotherapy protocol and establishing the prognosis. There are several chemotherapy protocols described in literature to treat lymphoma on different species, but generically they fall into two categories: single agent chemotherapy and multiple agent chemotherapy. Most of them consist in an induction and a maintenance phase. When the animal develops signs compatible with multiple drug resistance to one protocol, the latter one should be changed to other that includes agents with different mechanisms of action in order to reinduce remission. Whatever chosen treatment, in any species, its main goal is not to obtain the cure but to maintain the pet’s quality of life for as long as possible. Associated with lymphoma paraneoplastic syndromes can develop such as cachexia and hypercalcemia. The former constitutes the most common paraneoplastic syndrome of lymphoma in all animal species. In order to fight the development of cachexia, the animal should be fed with lipids and proteins enriched food and also low in carbohydrates to take advantage of the specific metabolic pathway of the tumour. In fact the later are most efficiently used by the tumour for energy production than proteins or lipids. To finish my thesis I will present three clinical cases of lymphoma in different species: the dog (Canis lupus familiaris), the ferret (Mustela putorius furo) and the African grey (Psittacus erithacus congolensis).
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Davis, Jillian S. "Functional Morphology of Mastication in Musteloid Carnivorans." Ohio University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1405694251.
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Fernando, Miguel Santiago Ferreira. "Patologia Adrenal no Furão (Mustela putorius furo)." Dissertação, 2014. https://repositorio-aberto.up.pt/handle/10216/73131.
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Frings, Barbara [Verfasser]. "Abdominale Sonographie beim Frettchen (Mustela putorius f. furo L. 1758) / vorgelegt von Barbara Frings." 2004. http://d-nb.info/972532765/34.
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Riechert, Maren [Verfasser]. "Untersuchungen ausgewählter Nierenkrankheiten beim Frettchen (Mustela putorius f. furo L. 1758) / vorgelegt von Maren Riechert." 2005. http://d-nb.info/978076923/34.
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Aleixo, Mariana Barradas. "Neoplasias tegumentares em furões (Mustela Putorius Furo): estudo retrospetivo de 40 neoplasias tegumentares em furões." Master's thesis, 2016. http://hdl.handle.net/10437/7447.
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Orientação : Pedro Faísca ; orientação externa : António RamisA crescente popularidade dos furões como animais de companhia tem vindo a trazer novas luzes às mais diversas áreas da medicina veterinária em relação a esta espécie. Uma delas é a oncologia, onde um maior número de dados disponiveis referentes a neoplasias tem vindo a mudar o que se pensava saber sobre estas patologias em furões. Sendo as neoplasias cutâneas e tegumentares uma parte significativa do total de neoplasias observadas, esta dissertação teve o objectivo de recolher os dados epidemiológicos e características histológicas em neoplasias tegumentares em furões domésticos. Foi feita uma pesquisa por palavras-chave e diagnósticos codificados na base de dados da SDPV-UAB a fim de recolher esta informação e 40 amostras de neoplasias correspondiam aos critérios de inclusão neste estudo. As neoplasias tegumentares tiveram uma prevalência de 31,6% de todas as neoplasias encontradas em furões, sendo superiores ao descrito, assim como as neoplasias consideradas malignas, podendo-se relacionar com factores de maneio reprodutivo, alimentar e médico, assim como localização geográfica. Os tipos de neoplasia tegumentares mais comumente encontradas foram os mastocitomas cutâneos (17: 42,5%), os tumores de glândulas sebáceas (6: 15%) e tumores de glândulas apócrinas (6: 15%). A idade dos furões afetados variava de inferior a 6 meses a mais de 10 anos de idade. A incidência neoplásica era mais elevada entre a faixa etária dos 4 aos 7 anos, sendo que a média de idade para ocorrência eram os 5,6 anos. Não se observou predileção de género embora se observassem maiores prevalências em fêmeas e machos esterilizados e castrados, respetivamente. As restantes prevalências de neoplasias observadas coincidiam com as descritas a nível bibliográfico.
The rising popularity of ferrets as pets has been bringing new lights to different veterinary fields related to this species. One of these fields is oncology, where the increasing data available regarding neoplasias has been changing what we thought we knew about these diseases in ferrets. Being the cutaneous and tegument neoplasias a very large part of all the neoplasias in ferrets, this dissertation had the objective to collect epidemiological data and histologic characteristics on integumentary neoplasms in pet ferrets. A keyword and code search was made at the SDPV-UAB database to collect the information and 40 neoplasms met the criteria for inclusion in the study. Integumentary neoplasms were found to have a prevalence of 31,6% of all neoplasms found in the ferret. This is a higher number than the observed by other authors, as well as the malignant neoplasia found, and could be related to husbandry practices and geographic location. The most common tumor types were mast cell tumor (17: 42,5%), sebaceous glands tumor (6; 15%) and apocrine glands tumor (6; 15%). The age of the affected ferrets ranged from less than 6 months to more than 10 years of age. Tumor incidence was highest in ferrets between 4 and 7 years of age; the mean of age for neoplasm occurrence was of 5,6 years. No sex predilection was found, although higher prevalence of integumentary neoplasms was observed in neutered females and males. The other observed prevalences were similar to those described in the bibliography.
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Gorgas, Daniela [Verfasser]. "Sonographische Untersuchungen der Nieren beim Frettchen (Mustela putorius f. furo L. 1758) / vorgelegt von Daniela Gorgas." 2004. http://d-nb.info/972532684/34.
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Schernthaner, Anita Veronika Hildegard [Verfasser]. "Etablierung einer Medetomidin-Midazolam-Ketamin-Kombinationsanästhesie für das Frettchen (Mustela putorius furo) / von Anita Veronika Hildegard Schernthaner." 2011. http://d-nb.info/101104711X/34.
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Hupfeld, Daniela [Verfasser]. "Visual perception deficits in albinotic mammals - ferrets (Mustella putoriius furo) and rats (Rattus norvegiicus; strains Wistar and Long-Evans) = Visuelle Wahrnehmungsdefizite albinotischer Säuger - Frettchen (Mustela putorius furo) und Ratten (Rattus norvegicus; Stämme Wistar und Long-Evans) / vorgelegt von Daniela Hupfeld." 2005. http://d-nb.info/977162699/34.
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