Percorrer por autor "Coelho, C."
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- A case of biliary cystadenoma in a geriatric cat.Publication . Vala, Helena; Nóbrega, C.; Ribeiro, A.; Mega, C.; Oliveira, A. L.; Santos, C.; Coelho, C.; Esteves, F.; Cruz, R.; Mesquita, J. R.A 9–year-old male European cat was referred for clinical examination with a history of anorexia, apathy and mild dehydration. Neurological exam revealed anisocoria and decreased pupillary reflex. Ultrasound examination of the abdomen suggested the presence of a mesenteric mass and several areas of renal and hepatic lesions. Renomegaly was also observed. Samples of organs were submitted to the pathology service of the Superior Agrarian School of Viseu. Macroscopic exam of the liver showed several prominent whitish areas that, on cut section, revealed multilocular cystic appearance with greenish colour in some of them. The mesenteric mass, of friable consistency, showed 5,5 x4,4x3,5 cm On cut section this mass revealed whitish areas of soft consistency that alternated with hemorrhagic areas. The kidneys showed an white, irregular surface, and also in one of them a corical prominent nodule was seen. Several sections were processed for routine histopathological diagnosis. Microscopic exam revealed that the mesenteric mass corresponded to a tumour of lymphoid cells. Cells were large, with scanty cytoplasm, euchromatic round nucleus with prominent central nucleoli, high mitotic count and moderate pleomorphism invading surrounding adipose tissue. The same type of cells was observed in the liver and kidneys. Based on these results, a lymphoma with renal and hepatic metastases was diagnosed in the mesenteric mass. Concomitantly, microscopic examination of the liver showed hepatocyte vacuolation and trabecular disorganization, with multiple cystic cavities lined by an epithelium of cubic or squamous type, showing fine fibrovascular tissue stroma. The cuboidal epithelial cells presented a moderate amount of pale eosinophilic cytoplasm, round or oval nucleus, vesicular, oriented centrally and with small or inapparent nucleoli. Based on these results, the diagnosis of neoplasia derived from biliary epithelium, was established. The differential diagnosis to be considered on this case were colangioma and biliary cystadenoma. The definitive diagnosis of biliary cystadenoma was established, based on the presence of multiple cystic cavities, disseminated by the hepatic parenchyma. According to previous statements, it was concluded that in spite of its rare occurrence, this is a case of biliary cystadenoma.
- A case of intense and multiple parasitic infestation in a wild pigeon (Columbia livia).Publication . Coelho, C.; Nóbrega, C.; Santos, C.; Cruz, R.; Mesquita, J.; Oliveira, A. L.; Mega, A. C.; Esteves, F.; Vala, HelenaIntroduction The prevalence of parasitic diseases in poultry seems to have significantly reduced due not only to the intensive production system but also to the improving conditions of hygiene and management practiced. However, parasitic diseases continue to have great importance in traditional production systems and production systems in the outdoors, contributing significantly to productivity decline of these farms. The pigeon (Columbia livia), a specie produced with outdoors access is more susceptible to infestations. The growing population of wild pigeons in urban areas can be decisive in the infestation of domestic pigeons, since they share the same places and their sanitary control is more difficult. Objectives The aim of this work is to describe a case of a pigeon (Columbia livia) with an intense parasitic infestation, this being the cause of death, with common parasitic species and other less frequent. Material and Methods A cadaver of a pigeon was submitted to the necropsy of Anatomic Pathology Laboratory of the Agrarian Superior School of Viseu, a detailed post mortem examination was carried out and samples were taken. All samples were fixed in 10% neutral-buffered formalin, for a maximum of 48 hours and processed following the routine histopathological technique. Results Gross examination lesions revealed rounded red lesions in the proventriculus serosa and lung congestion. Microscopic examination confirmed severe lung congestion, with hemosiderosis and the presence of numerous nematodes in cross section, discussing the hypothesis that it might be a case of Cyathostoma bronchialis (Muehlig 1884), taking into account the location or, less likely, an erratic parasite in histotropic migration phase. Eggs observed at this location had thick shell, oval shape, some were embryonated and 35-40 μm in length by 20-25 μm in width. In the lumen of the proventriculus glands, nematodes in cross section were also observed, noting numerous barrel-shaped eggs, embryonated larvae, oval poles and 55 mm in length by 25 mm in width, apparently compatible with parasites of the genus Tetrameres. Conclusion The high parasitic infestation of the wild pigeon specimen subjected to necropsy, with several, common and uncommon, species of parasites, the severity of lesions, leading to death of the animal, as well as the fact that infected wild birds favoring the spread of the parasite to the domestic pigeons and other poultry production, consisting of a major concern for producers, justifies the study of isolated cases, even constituting an epidemiological alert for the regions where they appear.
- Characterization of Beekeepers and Their Activities in Seven European CountriesPublication . Guiné, Raquel P. F.; Mesquita, S.; Oliveira, Jorge; Coelho, C.; Costa, Daniela; Correia, Paula; Esteves Correia, Helena; Dahle, B.; Oddie, M.; Raimets, R.; Karise, R.; Tourino, L.; Basile, S.; Buonomo, E.; Stefanic, I.; Costa, Cristina Amaro DaBeekeeping is an ancient activity that is gaining interest among practitioners and society in general. It is as an activity with positive impacts in the environmental, social and economic spheres, with the potential to reconnect these dimensions and contribute to sustainable development. Thus, it is important to determine the profiles of beekeepers across the world, and to understand the main social, economic or ecological drivers that shape their activities. Hofstede cross-cultural dimensions were used to better explain differences between countries. A survey was undertaken of beekeepers in different countries (Croatia, Estonia, Finland, Italy, Norway, Portugal, and Spain) in the native language of each nation. A total of 313 questionnaires, using an online platform or in paper form, was delivered face-to-face during training or dissemination events in 2019. Norway and Finland were the countries with the highest percentage of respondents with a university degree (>80%), while Spain (42%) and Croatia (48%) presented the lowest percentages. Most participants were experienced beekeepers (59% had more than five years of experience) with more than 50 colonies. With the exception of Italy, beekeeping appears to be a hobby or an additional professional activity. The main beekeeping products for these beekeepers were honey, wax, colonies and propolis, with an average honey production per season of 24.5 kg/hive. Crossing socio-demographic characteristics and Hofstede cross-cultural dimensions showed a relation among countries with higher Power Distance Index (PDI; this value expresses how society accepts and expects a certain inequality of power) and lower annual income and educational level (Croatia, Portugal, and Spain). A strong correlation appeared between Masculinity Femininity Index (MFI; this value refers to gender effects in society, with feminine societies meaning that the dominant values are caring for others and quality of life, as opposed to masculine societies, which are driven by competition, achievement and success) and age, income and education, with Norway presenting the most feminine society, with more educated and older beekeepers. The Uncertainty Aversion Index (UAI; this value explains how members of a society feel when dealing with unknown situations) was strongly associated with education. The results showed that increasing beekeepers’ income will contribute to balancing the distribution of power among members of society, and that this might be achieved by training, especially in Croatia, Portugal, Spain, and Italy.
- Entamoeba coli no homem e nos animais domésticos.Publication . Nascimento, C.; Néri, H.; Silva, L.; Silva, R.; Coelho, C.; Vasconcelos, N.; Vala, HelenaEntamoeba histolytica e Entamoeba coli são protozoários da família Endamoebidae. O Homem é o seu principal hospedeiro, no entanto, outros mamíferos como os suínos, cães, gatos, primatas e roedores, podem também ser atingidos. Ambos os parasitas habitam o intestino grosso de Homens e animais, sendo a sua forma infestante eliminada através das fezes. Com um ciclo biológico idêntico, constituído por quatro fases - trofozoíto, pré-quisto, quisto e metaquisto – apresentam diferenças na sua fase de quisto, a forma infestante, com a Entamoeba histolytica a exibir quatro núcleos, enquanto Entamoeba coli apresenta quistos com oito núcleos. A principal diferença entre estas duas espécies reside, no entanto, no facto de uma ser patogénica (Entamoeba histolytica) e a outra (Entamoeba coli) viver como um comensal do intestino, não causando doença. Entamoeba histolytica é causadora no ser humano, da doença conhecida como disenteria amebiana. Este parasita pode originar infecções sintomáticas ou assintomáticas e tanto os portadores sãos como os infectados, funcionam como reservatório da infecção, não só para a espécie humana como também para animais. As infecções naturais em animais estão descritas em várias partes do mundo, principalmente em cães. Frequentemente são infecções esporádicas e, muitas vezes, adquiridas pelo contacto com humanos. Estão ainda descritas infecções experimentais noutros animais domésticos, como gatos, porquinhos-da-índia, coelhos e suínos. O potencial zoonótico desta parasitose, bem como a escassa informação actualizada sobre a sua incidência, tornam-na um importante objecto de estudo.
- Feline injection site sarcomasPublication . Nóbrega, Carmen; Mesquita, João; Cruz, Rita; Coelho, C.; Esteves, Fernando; Mega, Cristina; Santos, C.; Vala, HelenaFeline injection site sarcoma (FISS), formerly known as Vaccine Associated Sarcoma (VAS) is a rare, but life-threatening disease. The incidence estimates have varied from 1 case of FISS per 1,000-10,000 cats vaccinated in North America and between 1 per 5,000-12,500 vaccination visits in United Kingdom. It has been primarily associated with vaccine administration, but several other injectable materials/substances have been implicated as aetiologic agents, namely lufenuron, penicilin, metilprednisolone, meloxicam, non-absorbable suture material and microchip. FISS can have a large latency period (three months-13 years), but eight years old is the average age of onset. They are tumours that arise subcutaneously, reaching a variable number of layers beneath the skin (muscle, bone). They are firm, not painful, solid and variable in size. Clinical assessment and biopsy are the basis for FISS diagnosis. In order to prevent FISS, vaccination should be carefully planned and be provided in easily resectable regions. Hind legs, tail and flanks, are preferable regions for vaccine administration.
- Feline lungworm infection. An emerging concern?Publication . Vala, Helena; Esteves, F.; Santos, C.; Mega, A.C.; Coelho, C.; Nóbrega, C.; Cruz, C.; Mesquita, J. R.Infectious feline upper respiratory tract disease is very common and Aelurostrongylus abstrusus is the most often diagnosed parasitic cause, although clinical signs may go unnoticed and diagnosis is challenging as it has several limitations. Noting that more cases have been recorded in recent years, the authors, in the present work, describe in detail the features of five cases of Aelurostrongylus abstrusus registered in their work and influence area, to alert animal health professionals to this emerging concern.
- Identificação de helmintes no coelho bravoPublication . Coelho, C.; Nóbrega, C.; Vala, HelenaO coelho bravo (Oryctolagus cuniculus), é uma espécie que desempenha um papel importante na organização e diversidade ecológica na Península Ibérica, uma vez que faz parte da cadeia alimentar de várias espécies, algumas em vias de extinção (Moreno et al., 2004; Delibes-Mateos et al., 2007). Em Portugal, podemos encontrá-lo de Norte a Sul do país, no entanto, a sua densidade populacional tem sofrido um acentuado decréscimo ao longo dos últimos anos (Ferreira, 2003). As infestações parasitárias alteram o equilíbrio fisiológico do animal, favorecendo uma depressão do sistema imunitário e predispondo a infecções originadas por outros agentes etiológicos. São vários os helmintes que afectam esta espécie animal, provocando efeitos adversos no seu organismo, nomeadamente a destruição dos tecidos e a competição pelos nutrientes que origina atrasos no crescimento animal e, consequentemente na produtividade (Soulsby, 1988). Este estudo teve por base a necrópsia de sete animais, obtidos numa exploração de coelho bravo da região centro de Portugal, em resultado de morte natural, e teve como objectivo a identificação dos helmintes adultos existentes no estômago e intestino de machos e fêmeas. O helminte mais frequentemente encontrado, independentemente do sexo do hospedeiro, foi o Grafidium strigosum, o que vai de encontro a outros estudos efectuados (Allan et al., 1999). Para além de ter sido encontrada uma maior diversidade nas fêmeas, também nestas se verificou um maior número de parasitas adultos presentes. Todos os helmintes encontrados, pertencem à classe Nematoda e Cestoda. As várias espécies encontradas foram identificadas tendo por base aspectos morfológicos do parasita adulto, bem como o tipo e morfologia dos ovos encontrados nas fezes recolhidas da porção final do tubo digestivo. Face aos resultados obtidos e que foram similares aos de outros autores (Foronda et al. 2003; Foronda et al. 2005, Eira et al. 2007), pretendemos prosseguir a realização de estudos mais detalhados e que abranjam outras áreas geográficas, no sentido de melhorar a produtividade das explorações e simultaneamente preservar e manter esta espécie animal.
- Interstitial nephritis in avian pathology.Publication . Nóbrega, C.; Coelho, C.; Oliveira, A. L.; Mega, A. C.; Esteves, F.; Vala, HelenaIntroduction Interstitial nephritis often occurs in birds, associated with diverse aetiologies, including infectious and non-infectious ones. In the nephritis of infectious origin, we can highlight the viral origin, mainly avian nephritis virus (AVN), but also Newcastle disease, infectious bronchitis and Marek's disease and also nephritis of bacterial and parasitic origin. As non-infectious causes, we can point to the deposition of inflammatory proteins in the glomerular space that leads to glomerulonephritis. Moreover, pigeon are a growing specie in urban areas and their proximity with other birds, including poultry, favours propagation of diseases, however available studies on its health status and its possible interaction with other domestic specie are scarce, justifying increasingly deepening of cases in this species. Aim This work intends to make an update theme, using as examples two cases of interstitial nephritis in poultry, concomitantly with other common diseases. Material and methods Two birds with unspecific signs of lethargy and death occurring few hours later, were sent to the Laboratory of Pathology, Agrarian School of Viseu, to determine the cause of death. A detailed post-mortem examination was carried out, samples were taken and processed following the routine histopathological technique. Results No remarkable gross lesions were observed unless a slight congestion in one kidney. Microscopic examination revealed the presence of mononuclear cell infiltration in renal interstitium in one case and mixed inflammatory infiltrate in the other. Concomitantly, the birds had other common diseases, different in each case, discussing the significance of the presence of interstitial nephritis in birds as nonspecific secondary injury associated with other pathologies or specific and primary. Conclusion The presence of interstitial nephritis in a variety of avian diseases raises some questions, including why the kidney is so consistently affected. In mammals, there are several urinary pathologies that affect only the urinary system, but in birds, although this situation also exists, most urinary disorders are part of multi-systemic conditions. On the other hand, cases of pigeons with multisystem conditions, and given their role as transmitters of disease to other birds, represent an element of value to study nowadays.
- Intoxicações nos animais de companhiaPublication . Mota, A.; Mega, C.; Mesquita, J.; Esteves, F.; Cruz, R.; Oliveira, A. L.; Santos, C.; Coelho, C.; Pires, J.; Pires, P.; Silva, V.; Vala, Helena; Nóbrega, C.Os animais de companhia são expostos, muito frequentemente, a produtos tóxicos. Estes são os agentes que provocam envenenamento e podem ser colocados em contacto com o animal de forma acidental ou mesmo propositadamente. A maioria das intoxicações nas espécies canina e felina acontecem por falta de informação dos proprietários, pelo que devem ser aplicadas estratégias educacionais de forma a evitar estas situações. Nestas mesmas estratégias devem ser fornecidas informações sobre os tóxicos mais comuns, bem como sobre os primeiros socorros que devem ser prestados. O Enfermeiro Veterinário possui um papel fundamental, pois pode fornecer essa mesma informação. Para isso, é necessário um conhecimento básico do metabolismo dos venenos, do diagnóstico e da terapêutica para cada tipo de intoxicação.
- Necrópsia em coelhosPublication . Vala, Helena; Coelho, C.A necrópsia consiste na abertura e exame sistemáticos e metódicos de um cadáver animal, com os objetivos de determinar a causa da morte, estabelecer o diagnóstico morfológico e etiológico da doença, confirmar o diagnóstico clínico e estabelecer a relação entre os dados clínicos e a patologia, avaliar os resultados do tratamento, com vista a melhorar a sua aplicação, informar o clínico da necessidade de medidas sanitárias ou de saúde pública e obter informação para análise estatística ou epidemiológica.