A Senna occidentalis, popularmente conhecida por fedegoso, é uma planta utilizada em várias culturas ao redor do mundo como alimento e como fitofármaco contra várias doenças em seres humanos, enquanto em medicina veterinária há relatos de intoxicações espontâneas em animais de produção, como, bovinos, equinos e suínos. A toxicidade dessa planta é atribuída à diantrona, princípio ativo encontrado em maior concentração nas sementes da planta, que promove o desacoplamento da fosforilação oxidativa mitocondrial, causando dano celular. Assim, o objetivo do presente trabalho foi avaliar os possíveis efeitos tóxicos, em particular, os neurotóxicos causados pela exposição oral a diferentes concentrações (1, 2, 3 e 4%) de sementes de S. occidentalis na ração, durante 28 e 90, em ratos Wistar machos e fêmeas. Essas avaliações foram embasadas nos protocolos da OECD 407, 408 e 424. Foram avaliados: consumo de água e de ração; peso corpóreo; sinais clínicos de toxicidade (atividade geral, frêmito vocal, irritabilidade resposta ao toque, aperto de cauda, reflexo auricular, reflexo corneal e piloereção); comportamento no Campo Aberto, no Labirinto em Cruz e o Reconhecimento de Objetos; parâmetros hematológicos, bioquímicos séricos e exame anatomopatológico. Os resultados do estudo da exposição por 28 dias mostrou: redução de peso corpóreo apenas em fêmea do grupo 4%; presença de piloereção em machos e fêmeas do grupo 4%; no Campo Aberto redução da locomoção e aumento de grooming em fêmeas dos grupos 2 e 4%; no labirinto em cruz elevado redução da porcentagem de tempo nos braços abertos (%TBA) no grupo 1% e da avaliação de risco nos grupos 1, 2 e 4% em machos, enquanto em fêmeas apenas redução da %TBA no grupo 1%. No estudo de 90 dias observou-se: óbitos de animais dos grupos 3 e 4%, redução de peso corpóreo em fêmeas (6ª semana de exposição) e em machos (9ª semana de exposição); presença de piloereção em fêmeas (63º dia de observação) e em machos (70º dia de observação); no Campo Aberto redução da locomoção e aumento de grooming em fêmeas dos grupos 2 e 4%; no Labirinto em Cruz Elevado redução de %TBA no grupo 1% e na avaliação de risco em machos dos grupos 1 e 2%, enquanto em fêmeas houve apenas redução do %TBA no grupo 1%. Em relação aos parâmetros hematológicos, bioquímicos e anatomopatológicos, a exposição a S. occidentalis não causou alterações significantes entre os grupos. Esses resultados, em conjunto, mostraram que a exposição a diferentes concentrações das sementes de S. occidentalis na ração de ratos por 28 e 90 dias foi capaz de causar toxicidade caracterizada pela ocorrência de óbitos, redução de peso corpóreo e piloereção, bem como promoveu um estado comportamental sugestivo de ansiedade, sendo esses efeitos concentração-dependente, tempo- dependente, e sugerindo ser as fêmeas mais susceptíveis / The Senna occidentalis, popularly known as fedegoso, is used by several cultures around the world as food and as phytochemical against many human diseases, while in veterinary medicine, there are several spontaneous intoxications reports of production animals as cattle, horses and pigs. This plant intoxication is due to the active compound named dianthrone, founded at high concentration at the seed; it promotes the oxidative phosphorylation uncoupling at mitochondria, leading cellular damages. Thus, the aim of the present study was to evaluate the toxic effects in rats (male and female), particularly the neurotoxic ones, attributable to the oral exposition to different S. occidentalis seed concentrations incorporated at the chow (1, 2, 3 and 4%), for 28 and 90 days. The evaluation parameters were based on OECD guidelines 407, 408 and 424. We observed: water and chow intake; body weight; clinical signs of toxicity (general activity, vocal trill, irritability for toch, tail grip, auricular and corneal reflex and piloerection); the behavior at Open Field, Elevated Pluz Maze and Object Recognition tests; haematological, biochemistry and anatomopathological parameters. The 28 days study results showed: reducing body weight only at 4% female group; piloerections at 4% male and female animals; reducing locomotion and increase grooming by 2 and 4% female animals at open field test; at the Elevated Pluz Maze aparatus we observed: reducing porcentage time spent at open arms (%TBA) by the 1% group and risk assessment by 1, 2 and 4% males, while only the 1% females reduced the %TBA. At the 90 days exposition, we observated: 3 and 4% animals death, reducing females (from 6th week of exposition) and males (from 9th week) body weight; piloerection presented by female (from 63rd observation day) and male (from 70th day of observation) animals; reducing locomotion and increase grooming by 2 and 4% female animals at open field test; At Elevated Pluz Maze test, we observed: reducing %TBA by 1% group animals and reducing risk assessment by 1 and 2% males, while reducing %TBA only by 1% female animals. About the haematological, biochemistry and anatomopathological parameters, the S. occidentalis exposition did not caused significant changes between the groups. Taken together this finds, we can notice that the different seed concentrations of S. occidentalis exposition for 28 and 90 days was capable to induce toxicity featured by death, reducing body weight and piloerection, as well as anxiety behavior like, in a concentration and time-dependent way and the female animals are more susceptible to S. occidentalis toxic effects

A Senna occidentalis, popularmente conhecida por fedegoso, é uma planta utilizada em várias culturas ao redor do mundo como alimento e como fitofármaco contra várias doenças em seres humanos, enquanto em medicina veterinária há relatos de intoxicações espontâneas em animais de produção, como, bovinos, equinos e suínos. A toxicidade dessa planta é atribuída à diantrona, princípio ativo encontrado em maior concentração nas sementes da planta, que promove o desacoplamento da fosforilação oxidativa mitocondrial, causando dano celular. Assim, o objetivo do presente trabalho foi avaliar os possíveis efeitos tóxicos, em particular, os neurotóxicos causados pela exposição oral a diferentes concentrações (1, 2, 3 e 4%) de sementes de S. occidentalis na ração, durante 28 e 90, em ratos Wistar machos e fêmeas. Essas avaliações foram embasadas nos protocolos da OECD 407, 408 e 424. Foram avaliados: consumo de água e de ração; peso corpóreo; sinais clínicos de toxicidade (atividade geral, frêmito vocal, irritabilidade resposta ao toque, aperto de cauda, reflexo auricular, reflexo corneal e piloereção); comportamento no Campo Aberto, no Labirinto em Cruz e o Reconhecimento de Objetos; parâmetros hematológicos, bioquímicos séricos e exame anatomopatológico. Os resultados do estudo da exposição por 28 dias mostrou: redução de peso corpóreo apenas em fêmea do grupo 4%; presença de piloereção em machos e fêmeas do grupo 4%; no Campo Aberto redução da locomoção e aumento de grooming em fêmeas dos grupos 2 e 4%; no labirinto em cruz elevado redução da porcentagem de tempo nos braços abertos (%TBA) no grupo 1% e da avaliação de risco nos grupos 1, 2 e 4% em machos, enquanto em fêmeas apenas redução da %TBA no grupo 1%. No estudo de 90 dias observou-se: óbitos de animais dos grupos 3 e 4%, redução de peso corpóreo em fêmeas (6ª semana de exposição) e em machos (9ª semana de exposição); presença de piloereção em fêmeas (63º dia de observação) e em machos (70º dia de observação); no Campo Aberto redução da locomoção e aumento de grooming em fêmeas dos grupos 2 e 4%; no Labirinto em Cruz Elevado redução de %TBA no grupo 1% e na avaliação de risco em machos dos grupos 1 e 2%, enquanto em fêmeas houve apenas redução do %TBA no grupo 1%. Em relação aos parâmetros hematológicos, bioquímicos e anatomopatológicos, a exposição a S. occidentalis não causou alterações significantes entre os grupos. Esses resultados, em conjunto, mostraram que a exposição a diferentes concentrações das sementes de S. occidentalis na ração de ratos por 28 e 90 dias foi capaz de causar toxicidade caracterizada pela ocorrência de óbitos, redução de peso corpóreo e piloereção, bem como promoveu um estado comportamental sugestivo de ansiedade, sendo esses efeitos concentração-dependente, tempo- dependente, e sugerindo ser as fêmeas mais susceptíveis / The Senna occidentalis, popularly known as fedegoso, is used by several cultures around the world as food and as phytochemical against many human diseases, while in veterinary medicine, there are several spontaneous intoxications reports of production animals as cattle, horses and pigs. This plant intoxication is due to the active compound named dianthrone, founded at high concentration at the seed; it promotes the oxidative phosphorylation uncoupling at mitochondria, leading cellular damages. Thus, the aim of the present study was to evaluate the toxic effects in rats (male and female), particularly the neurotoxic ones, attributable to the oral exposition to different S. occidentalis seed concentrations incorporated at the chow (1, 2, 3 and 4%), for 28 and 90 days. The evaluation parameters were based on OECD guidelines 407, 408 and 424. We observed: water and chow intake; body weight; clinical signs of toxicity (general activity, vocal trill, irritability for toch, tail grip, auricular and corneal reflex and piloerection); the behavior at Open Field, Elevated Pluz Maze and Object Recognition tests; haematological, biochemistry and anatomopathological parameters. The 28 days study results showed: reducing body weight only at 4% female group; piloerections at 4% male and female animals; reducing locomotion and increase grooming by 2 and 4% female animals at open field test; at the Elevated Pluz Maze aparatus we observed: reducing porcentage time spent at open arms (%TBA) by the 1% group and risk assessment by 1, 2 and 4% males, while only the 1% females reduced the %TBA. At the 90 days exposition, we observated: 3 and 4% animals death, reducing females (from 6th week of exposition) and males (from 9th week) body weight; piloerection presented by female (from 63rd observation day) and male (from 70th day of observation) animals; reducing locomotion and increase grooming by 2 and 4% female animals at open field test; At Elevated Pluz Maze test, we observed: reducing %TBA by 1% group animals and reducing risk assessment by 1 and 2% males, while reducing %TBA only by 1% female animals. About the haematological, biochemistry and anatomopathological parameters, the S. occidentalis exposition did not caused significant changes between the groups. Taken together this finds, we can notice that the different seed concentrations of S. occidentalis exposition for 28 and 90 days was capable to induce toxicity featured by death, reducing body weight and piloerection, as well as anxiety behavior like, in a concentration and time-dependent way and the female animals are more susceptible to S. occidentalis toxic effects

Depuis la vulgarisation de certains concepts comme la globalisation ou la mondialisation, le secteur agroalimentaire a connu une expansion fulgurante et un engouement incessant pour la commercialisation d’aliments entre les peuples à travers le monde. Ce phénomène, contribuant significativement à l’accroissement économique des marchés, n’est toutefois pas sans risque. Pendant ce temps, les dangers de sources microbiologiques, notamment les pathogènes, sont véhiculés par des matrices alimentaires et voyagent d’un pays à l’autre, ce qui augmente le risque de contamination pour les consommateurs. Conséquemment, on assiste à une augmentation des cas d’allergies alimentaires, d’intoxications ou de toxi-infections alimentaires dont les agents étiologiques peuvent venir des quatre coins du monde. À cet effet, les organismes réglementaires comme l’Agence canadienne d’inspection des aliments (ACIA), Santé Canada, la Food and Drug Administration (USFDA) américaine ou d’autres autorités internationales compétentes comme l’Organisation des Nations unies pour l’alimentation et l’agriculture(FAO) et l’Organisation mondiale de la santé (OMS) multiplient leurs efforts afin de mettre en place des normes et politiques réglementaires pour aider l’industrie agroalimentaire à renforcer les contrôles depuis la fabrication jusqu’à la commercialisation des aliments. Les dangers microbiologiques venant de pathogènes comme Bacillus cereus demeurent un risque de santé publique majeur qu’il faut maîtriser afin d’assurer la protection des consommateurs. Bien que de nombreuses techniques de contrôle (e.g., additifs alimentaires, haute pression hydrostatique, rayonnements ionisants, procédés thermiques, etc.) ont été développées et utilisées pour assurer la salubrité et l’innocuité des aliments, dans certains cas cela n’a pas permis de produire des aliments totalement exempts de bactéries responsables de la dégradation/altération des aliments et de pathogènes causant des intoxications alimentaires comme c’est le cas avec B. cereus. En effet, cette bactérie pathogène est ubiquitaire, aérobie et anaérobie facultative. Elle est capable de produire dans une grande variété d’aliments et d’ingrédients comme les épices des spores très résistantes ainsi que différents types de toxines pouvant causer la diarrhée, la nausée, le vomissement et même la mort. Dans cette optique, et vue la grande difficulté à maitriser la contamination des aliments causée par ce pathogène, l’objectif général de cette recherche a été d’utiliser la technologie d’électro-activation, une branche appliquée de l’électrochimie qui s’intéresse notamment à la réactivité des solutions aqueuses, comme méthode alternative et potentiellement efficace pour lutter contre B. cereus afin de produire des aliments plus sécuritaires avec une grande valeur nutritionnelle et organoleptique. Pour y parvenir, des solutions aqueuses de sels d’acides organiques de lactate de calcium, d’ascorbate de calcium et de leur mélange équimolaire ont été électro-activées dans un réacteur soumis à un courant électrique continu avec des intensités de l’ordre de 250, 500 et 750 mA pendant un maximum de temps de 30 minutes afin de produire les acides organiques conjugués respectifs; de l’acide lactique et de l’acide ascorbique. Dans la première partie de ce travail de recherche, les caractéristiques physicochimiques (e.g., pH, acidité titrable, pKa) des solutions électro-activées (SÉA) ont été étudiées et leurs profils moléculaires comparés à ceux d’acides standards respectifs en utilisant différentes techniques (e.g., FTIR, HPLC, DSC, DPPH), ce qui a permis de confirmer la production d’acides organiques conjugués respectifs des sels utilisés. Ces SÉA avaient un pH très bas, une acidité titrable élevée, notamment pour l’ascorbate de calcium et le mélange. En plus, une activité antioxydante élevée a été observée pour la solution électro-activée d’ascorbate de calcium et du mélange. Dans la deuxième partie de l’étude, les SÉA traitées à 250, 500 et 750 mA pendant 10, 20 et 30 min ont été retenues pour être mises en contact avec des cellules végétatives de Bacillus cereus ATCC 14579 en conditions modèles (contact direct) afin d’évaluer leurs effets antimicrobiens sur ce pathogène. Les cellules ont été testées en contact direct avec les SÉA pendant 5, 30 et 60 secondes. Le même traitement a été également réalisé par contact direct avec des acides organiques standards (lactique, ascorbique) pendant 5, 30, 60, et 120 secondes afin de faire des comparaisons. Les SÉA et les acides organiques standards correspondants avaient les mêmes valeurs d’acidité titrable. Par la suite, les cellules ont été observées au microscope (coloration au bleu de méthylène et fluorescence) afin d’évaluer les effets inhibiteurs/destructeurs de ces solutions. Également, les SÉA ont été diluées avec de l’eau distillée pour obtenir des solutions possédant 10 à 90% de l’acidité titrable (force) initiale pour être ensuite testées contre les cellules de B. cereus. Les résultats ont démontré que toutes les SÉA avaient une grande efficacité contre les cellules végétatives de B. cereus. Également, même à des taux de dilution représentant en moyenne 20% de la force initiale des SÉA, l’effet antimicrobien était très élevé pour les différentes solutions. L’observation de B. cereus au microscope a permis de confirmer les effets létaux des SÉA. Dans ce volet avec des cellules végétatives de B. cereus, l’efficacité des SÉA a été estimée à une réduction de 4–7 log UFC/mL. En plus, il a été démontré que le pouvoir antibactérien des SÉA était nettement plus élevé que celui des acides lactiques et ascorbiques standards (conventionnels). Dans la troisième partie de cette étude, des solutions électro-activées de lactate de calcium, d’ascorbate de calcium et de leur mélange équimolaire à 750 mA pendant 30 minutes ont été retenues et utilisées contre des spores de Bacillus cereus ATCC 14579 en conditions modèles et dans du saumon Atlantique frais. Les spores traitées ont été analysées à l’aide de microscopes électroniques à balayage et à transmission pour évaluer les effets sporicides des SÉA. Les résultats obtenus ont clairement montré un grand pouvoir sporicide des SÉA utilisées sur les spores de B. cereus avec une réduction de 7 à 9 log en utilisant une population initiale de spores de 10⁹ UFC/mL, dépendamment des conditions évaluées; à savoir : en contact direct (2–30 min), dans du saumon utilisé comme matrice alimentaire(2–7 min), ainsi qu’en combinaison avec de la chaleur modérée de 60, 70, 80 et 90 °C pendant 0.5–2 min. Également, il a été observé que la capacité sporicide des SÉA augmentait avec la température et le temps de contact. La microscopie électronique à balayage et à transmission a permis de constater que les SÉA pouvaient provoquer la destruction totale des cellules de B. cereus, et notamment la perforation de la membrane (cortex et manteau), ainsi que le reflux de différentes composantes de la structure des spores de B. cereus. Tenant compte des résultats obtenus dans cette étude, nous pouvons conclure que les solutions électro-activées à base de lactate de calcium, ascorbate de calcium et leur mélange, notamment celles électro-activées à 750 mA–30 min, pourraient être d’une grande contribution afin de renforcer la capacité de l’industrie alimentaire à lutter contre B. cereus ATCC 14579 et de produire des aliments plus sécuritaires pour le consommateur. / Since the popularization of concepts like globalization, the agri-food sector has experienced a huge expansion and a ceaseless craze for the marketing of food between the peoples worldwide. This phenomenon, contributing significantly to the economic growth of the markets, is not without risk, however. Meanwhile, microbiological hazards, including pathogens, are carried through food matrices and travel from one country to another, increasing the risk of contamination for consumers. Consequently, we are also witnessing an increase in cases of food allergies, foodborne illnesses and outbreaks, with etiological agents coming from all over the world. Thus, regulatory organisms such as Canadian Food Inspection Agency (CFIA), Health Canada, United States Food and Drug Administration (USFDA) or competent international authorities like Food and Agriculture Organization of the United Nations (FAO) and World Health Organization (WHO) are stepping up efforts to put in place regulatory standards and policies in order to help the food industry to strengthen controls from the processing to the marketing of foods. Microbiological hazards from pathogens like Bacillus cereus remain a major public health risk that must be controlled in order to ensure consumers protection. Although many techniques of control (e.g., food additives, high hydrostatic pressure, ionizing radiation, thermal processes, etc.) have been developed and used to ensure the safety and security of foods, in some instance this has not allowed to produce food products that are completely free of bacteria responsible for degradation/spoilage of food and pathogens causing food poisoning as is the case with B. cereus. Indeed, this pathogenic bacterium is ubiquitous, aerobic and facultative anaerobic. It is able to produce, in a wide variety of foods and ingredients such as spices, highly resistant spores as well as different types of toxins that can cause diarrhea, nausea, vomiting, and even death. In this context, and given the great difficulty in controlling the contamination of food caused by this pathogen, the general objective of this research was to use the electro-activation technology, an applied branch of electrochemistry which is particularly interested in the reactivity of aqueous solutions, as an alternative and potentially effective method to fight against B. cereus in order to produce safer foods with high nutritional and organoleptic values. To achieve this, aqueous solutions of organic acid salts of calcium lactate, calcium ascorbate and their equimolar mixture were electroactivated in a reactor subjected to a direct electric current with intensities of 250, 500 and 750 mA for a maximum time of 30 minutes in a bid to produce the respective conjugated organic acids, lactic acid and ascorbic acid. In the first part of this research work, the physicochemical characteristics (e.g.,pH, titratable acidity, pKa) of the electro-activated solutions (EAS) were studied and their molecular profiles compared to those of respective standard acids using different techniques (e.g., FTIR, HPLC, DSC, DPPH), which helped to confirm the production of conjugated organic acids from the respective salts used. These EAS had a very low pH, a high titratable acidity, particularly for the calcium ascorbate and the mixture. In addition, a high antioxidant activity was observed for the electro-activated calcium ascorbate solution and the mixture. In the second part of the study, the EAS treated at 250, 500 and 750 mA for 10,20 and 30 min were selected to be brought into contact with vegetative cells of Bacilluscereus ATCC 14579 under model conditions (direct contact) in order to evaluate their antimicrobial effects on this pathogen. The cells were tested in direct contact with the EAS for 5, 30 and 60 seconds. The same treatment was also carried out by direct contact with standard organic acids (lactic, ascorbic) for 5, 30, 60, and 120 seconds in order to make comparisons. The EAS and the corresponding standard organic acids had the same titratable acidity values. There after, the cells were observed under microscope (Methylene blue and fluorescence) to evaluate the inhibitory / destructive effects of these solutions. Also, the EAS were diluted with distilled water to obtain solutions with 10 to 90% of the initial titratable acidity (strength) to be tested against B. cereus cells. The results demonstrated that all the EAS made were highly effective against the vegetative cells of B.cereus. Also, even at dilution rates averaging 20% of the EAS initial strength, the antimicrobial effect was very high for the different solutions. In addition, the microscopic observation of B. cereus has confirmed the lethal effects of EAS. In this part with the vegetative B. cereus cells, the efficacy of the EAS was estimated to a reduction of 4–7 log CFU/mL. In addition, the antibacterial power of the EAS has been shown to be significantly higher than that of the standard (conventional) lactic and ascorbic acids. In the third part of the study, electro-activated solutions of calcium lactate, calcium ascorbate and their equimolar mixture at 750 mA for 30 min were selected and used against the spores of Bacillus cereus ATCC 14579 under model conditions and in fresh Atlantic salmon. The treated spores were analyzed using scanning and transmission electron microscopes to evaluate the sporicidal effects of EAS. The results obtained clearly showed a great sporicidal power of the EAS used on B. cereus spores with a reduction of 7 to 9 log using an initial spore population of 10⁹ CFU/mL, depending on the conditions assessed; namely: in direct contact (2–30 min), in salmon used as a food matrix (2–7 min), as well as in combination with moderate heat of 60, 70, 80 and 90 ℃ for 0.5–2 min. Also, it was observed that the sporicidal capacity of the EAS increased with temperature and contact time. Scanning and transmission electron microscopy showed that the EAS could cause the total destruction of B. cereus cells, including perforation of the membranes (cortex and coat), as well as the reflux of different components of the structure of B. cereus spores. Taking into account the results obtained in this study, we can conclude that the electro-activated solutions made with calcium lactate, calcium ascorbate and their mixture, especially those electro-activated at 750 mA–30 min, could be of a great contribution to reinforce the capacity of the food industry to control B. cereus ATCC 14579 and produces safer foods for the consumer.

Les intoxications médicamenteuses volontaires répétées (IMVr) constituent un problème de santé publique croissant, mais sous-évalué et traité comme une conduite suicidaire, alors qu’elles appartiendraient au registre des addictions. Notre travail abonde dans ce sens en montrant que les suicides alcoolisés se font principalement par IMV et correspondent au deliberate self-harm syndrom ; les suicidants récidivants se distinguent par un névrosisme et un attachement anxieux typiques des addictions ; les IMVr même suicidaires témoignent d’une relation addictive aux médicaments ; le facteur le plus prédictif d’IMV serait de l’avoir envisagée. Conceptualisé de façon translationnelle et argumenté par une approche pharmacologique, nous proposons un modèle dimensionnel des conduites suicidaires, intégré au continuum des addictions, confirmant l’hypothèse initiale et l’intérêt d’un raisonnement transnosographique diagnostique et thérapeutique dans le champ des pathologies mentales. / Repeated Self-poisoning (RSP) constitute an under evaluated but growing public health problem, treated as a suicidal rather than an addictive behavior. Our work brings arguments by showing that suicides involving alcohol are mainly by self-poisoning and correspond to deliberate self-harm syndrome; repeat suicide attempters are identified by a neuroticism and anxious attachment typically found in addicts; even suicidal RSP shows addictive behavior involving medicines; the best predictor of self-poisoning is having thought about it. Conceptualized through a translational approach and supported by pharmacological arguments, we propose a multidimensional model of suicidal behaviors, that could integrate the continuum of addictive behaviors. This confirms the initial hypothesis and the viability of a transnosographic concept for diagnosis and treatment of mental illnesses.

The data herein described is a compilation of retrospective and prospective studies of diseases in goats diagnosed at the Laboratório de Anatomia Patologica at the Universidade Federal de Mato Grosso do Sul. This investigation examined 74 necropsy reports of goats obtained for the period between January 2012 and August 2015. The results yielded 72 conclusive diagnoses (in 6 cases there was more than one diagnosis by necropsy), and 16 it was not possible to conclude for a diagnosis.. Of the 72 conclusive diagnoses, 65.3% were infectious and parasitic diseases, 25.0% were intoxications and toxinfections, and 8.3% were metabolic and nutritional diseases. Other disorders were diagnosed on one occasion only (1.4%). Haemonchosis was the most prevalent condition in all diagnoses (27.8%), followed by bilateral bronchopneumonia (20.8%) and poisoning by Brachiaria decumbens (18.1%). Four scientific papers resulted from this study: (1) Spontaneous poisoning by Brachiaria decumbens in goats; (2) Renal encephalopathy due to acute renal failure in a goat; (3) Granulomatous leptomeningitis in a goat associated with infection by Cryptococcus neoformans and (4) Hepatogenous chronic copper toxicosis associated with grazing Brachiaria decumbens in a goat. These four papers are already published and attached to this thesis. / Esta tese envolveu o estudo retrospectivo e prospectivo de doenças de caprinos diagnosticadas no Laboratório de Anatomia Patológica da Universidade Federal de Mato Grosso do Sul. Para isso, foram examinados os laudos de necropsias de caprinos realizadas de Janeiro de 2012 a Agosto de 2015. Durante o período estudado foram realizadas necropsias de 74 caprinos, que resultaram em 72 diagnósticos conclusivos (em 6 necropsias houve mais de um diagnóstico) e em 16 não foi possível concluir por um diagnóstico. Do total de 72 diagnósticos conclusivos, 65,3% eram de doenças infecciosas e parasitárias, 25,0% eram de intoxicações e toxinfecções e 8,3% eram de doenças metabólicas e nutricionais. Outros distúrbios foram diagnosticados em menor proporção (1,4%). Hemoncose foi a condição mais prevalente sobre o total de diagnósticos (27,8%), seguida de broncopneumonia bilateral (20,8%) e de intoxicacao por Brachiaria decumbens (18,1%). Este estudo resultou em quatro trabalhos científicos: (1) Spontaneous poisoning by Brachiaria decumbens in goats; (2) Renal encephalopathy due to acute renal failure in a goat; (3) Granulomatous leptomeningitis in a goat associated with infection by Cryptococcus neoformans e (4) Hepatogenous chronic copper toxicosis associated with grazing Brachiaria decumbens in a goat. Esses quatros trabalhos já estão publicados e estão anexados a esta tese.