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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
561

Caracterização da digestão de resíduos agroindustriais em biodigestor de fluxo contínuo operado em escala real

Caldereiro, Gisele Maria Brod 31 March 2015 (has links)
Os abatedouros e frigoríficos caracterizam-se por agroindústrias potencialmente poluidoras devido a carga orgânica componente dos efluentes líquidos e resíduos sólidos gerados em seu processo. Para a minimização do impacto ambiental gerado por estes empreendimentos faz-se necessária a implementação de processos de tratamento que possibilitem a redução da carga orgânica, a transformação de resíduos em produtos de valor agregado e o aproveitamento energético. A implementação de biodigestores para o tratamento dos resíduos sólidos e efluentes líquidos gerados nos frigoríficos de suínos é uma opção interessante, haja visto o processo de digestão anaeróbia que compõe o sistema e os benefícios possíveis com sua aplicação. Neste intuito, o presente trabalho teve como objetivo a avaliação de um digestor anaeróbio de fluxo contínuo, em escala real, utilizado para o tratamento dos resíduos sólidos e efluentes líquidos oriundos do processo. Para isto procedeu-se a caracterização físico-química dos substratos de alimentação do biodigestor bem como do afluente e efluente do sistema, além da realização de análises com o intuito de avaliar as características do biofertilizante e do biogás originados no processo. Os resultados demonstraram que o substrato de alimentação do biodigestor é composto por diversas origens e, cada qual, possui características físico- químicas específicas e diferenciadas porém, quando unificadas, propiciam o desenvolvimento de um ambiente suscetível ao desempenho da digestão anaeróbia. Avaliando a eficiência do sistema em geral, considerando os valores obtidos nas análises do afluente e efluente do mesmo, observou-se que alguns parâmetros apresentam eficiência enquanto, outros, resultaram em aumento de concentração. Este fato pode ter sido desencadeado por fatores externos ao sistema. Quanto ao biofertilizante oriundo do biodigestor, foi caracterizado como resíduo sólido não inerte sendo possível, com algumas restrições, a sua aplicação em solo. O biogás, por sua vez, apresentou concentrações interessantes de metano, sendo, portanto, passível de utilização em diversos processos industriais. / Slaughterhouses are potentially polluting agricultural industries due to the organic load present in the wastewater and solid waste generated in the process. To minimize the environmental impact generated by this type of activity, it is necessary to provide a treatment processes that enables the reduction of the organic matter present in slaughterhouse waste, transforms waste into value-added products and exploits energy use efficiently. The implementation of biodigesters to treat solid waste and wastewater generated in slaughterhouses is an interesting option, given the anaerobic digestion process that makes up the system and the possible benefits it provides. Therefore, the present study evaluated the efficiency of an anaerobic continuous flow digester, in real scale, used for the treatment of solid waste and liquid effluents from the process. In order to do so, physicochemical characterization of the digester feed substrates, as well as, characterization of the influent and effluent of the system were performed. In addition, analyzes were executed to evaluate the characteristics of the bio-fertilizer and biogas originating in the process. The results showed that the digester feed substrate is composed of various origins and, each has a specific and distinct physicochemical characteristic, but when these different characteristics are combined they favor the development of an environment prone to the performance of the anaerobic digestion. By assessing the overall system efficiency, while considering the values obtained for the influent and effluent analysis, some parameters were considered efficient, whereas others result in the increase of concentration. This may have been triggered by factors which are external to the system. The bio-fertilizer originating from the digester was characterized as non-inert solid waste, which might require certain restrictions in its application in soil. Biogas, in turn, presented interesting methane concentration and is therefore likely to be used in various industrial processes.
562

Recherches sur l’habitat domestique à Pompéi à l’époque samnite : les maisons de taille moyenne / L’edilizia privata pompeiana in età sannitica : le case di livello medio / Domestic architecture in Pompeii between the forth and first c. B.C. : the case of middle-class houses

Auria, Addolorata 13 December 2013 (has links)
Cette étude doctorale s’inscrit dans le cadre d’une cotutelle de thèse entre les universités de Paris Ouest Nanterre La Défense et de « l’Orientale » de Naples. Elle vise à étudier les typologies architecturales et décoratives utilisées dans les maisons des classes moyennes de Pompéi entre la fin du IVe et le début du Ier s. av. J.-C. Cette thématique est encore incomplètement traitée par la littérature spécialisée, qui s’est souvent concentrée sur des contextes plus raffinés et des périodes ultérieures. La recherche a été appuyée sur l’analyse conjointe des données de fouilles, si ces dernières sont disponibles, et des structures d’époque samnite encore in situ. Par ailleurs, la participation à un projet de recherche sur la Regio VI, nous a offert l’occasion de travailler sur du matériel inédit et de démarrer notre enquête à partir d’un cas d’étude spécifique, la Casa del Granduca Michele (VI,5,5) et ensuite de vérifier la diffusion des données acquises à l’échelle de la ville. Le travail a été donc divisé en trois parties. La première a été consacrée au cas d’étude, avec une analyse approfondie de la structure et de la décoration de la maison notamment au IIe s. av. J.-C. La deuxième a concerné l’étude des types architecturaux diffusés dans la cité vésuvienne l’époque samnite, avec un regard particulier sur le type de la maison à atrium testudinatum qui n’avait pas fait l’objet d’une étude systématique. La troisième partie a enfin concerné des décors des maisons de taille moyenne. L’analyse a concerné, avec une approche diachronique, d’abord les décorations peintes des parois et des plafonds, ensuite les éléments accessoires et pour finir les revêtements de sols. / This Ph.D is prepared in co-tutorship between the Université de Paris Ouest Nanterre La Défense and the Università degli studi di Napoli « l’Orientale ». Its aim is to analyze the architectural and decorative typologies used in the construction of Pompeian middle class houses between the end of forth and the beginning of first c. B.C. As a matter of fact, if the most luxurious domus of this period are well known, many aspects of the middle-class houses are still to be studied, for they have long been left aside by the scientific research. The study has been based on the analysis of data coming both from excavations and from a survey of the samnitic structures still in situ. Moreover, the participation to a research program centered on the Regio VI has offered the occasion to work with unpublished material and to start the research from a case study, the Casa del Granduca Michele (VI,5,5). The diffusion of data collected in this house have later been verified with a research on the city level. Therefore, work has been divided in three parts. The first one has been dedicated to the case study by a deepened analysis of structure and decoration of this house in the second c. B.C. The second one to the architectural typologies used in middle class houses during the samnite period, with a particular regard to the type of the atrium testudinatum house, which previously had never been systematically studied. The third part has dealt with the decoration of these houses. The analysis, carried out with a diachronic approach, has concerned walls and ceilings’ paintings, floors and other elements like terracotta and main door stone capitals.
563

Parasite prevalence, nutritionally-related blood metabolites and pre-slaughter stress response in Nguni, Bonsmara and Angus steers raised on veld

Ndlovu, Thulile January 2008 (has links)
The effects of month on body weight, body condition scores, internal parasite prevalence and on nutritionally related blood metabolites were studied in Angus, Bonsmara and Nguni steers raised on sweet veld. Pre-slaughter stress was also determined using catecholamines, cortisol, dopamine, packed cell volume and serum creatinine levels. The blood chemical constituents evaluated included glucose, cholesterol, total protein, creatinine, urea, globulin, albumin, calcium, phosphorus, magnesium, aspartate amino transferase (AST), alkaline phosphatase (ALP) and creatinine kinase (CK). The Nguni steers maintained their body condition throughout the study period whereas Angus steers had the least body condition scores. Parasite levels were high during the rainy season and low during the dry season. The predominant internal parasites were Haemonchus (39.3 percent), Trichostrongylus (37.8 percent), Cooperia pectinita (25.5 percent), Fasciola gigantica (16.3 percent) and Ostertagia ostertagi (11.2 percent). The Nguni had the least parasite infestation levels and had high PCV levels. Nguni had higher levels of cholesterol and glucose (2.86 and 4mmol/l, respectively) than the other two breeds. Nguni and Bonsmara steers had higher (P<0.05) mineral levels. There were significant breed and month differences for glucose, cholesterol, creatinine, calcium, albumin, phosphorus, albumin-globulin ratio and ALP levels. Bonsmara was more susceptible to transport and pre-slaughter stress as it had the highest (P<0.05) levels of adrenalin (10.8nmol/mol), noradrenalin (9.7nmol/mol) and dopamine (14.8nmol/mol) levels, whereas the Nguni had the least levels of adrenalin (6.5nmol/mol), noradrenalin (4.6nmol/mol) and dopamine (4nmol/mol) levels. In conclusion, Nguni steers were better adapted to the local environmental conditions
564

Farm to abattoir conditions and their subsequent effects on behavioural and physiological changes and the quality of beef from extensively-reared Nguni and non-descript steers

Njisane, Yonela Zifikile January 2016 (has links)
The main objective of the study was to determine the effect of farm to abattoir environmental conditions and their subsequent effects on behavioural and physiological responses, as well as the quality of meat from Nguni (NG) and non-descript (ND) beef steers reared extensively on natural pastures. The forty 16 – 19 months old steers (20 ND and 20 NG) used in the current study were grouped together, medically treated, allowed three weeks acclimatizing period and were used in this trial over a four-month period. The weather and periodical variations influence on time budgets and body weights of these steers were determined. Furthermore, the effects of on-farm successive handling on behavioural scores and physiological responses of the same steers were determined. Later in the trial, some pre-slaughter effects on response-behaviour, bleed-out times and selected blood physiological responses were determined. Finally, the effect of genotype, muscle type, lairage duration, slaughter order and stress responsiveness on pH24, temperature, colour (L*, a*, b*, C, HA), thawing (TL) and cooking (CL) losses and Warner Bratzler Shear Force (WBSF) of the meat harvested from the same steers were determined. The daily time budgets of steers in natural pastures changed with temperature, humidity, observation week and time of the day. The grazing behaviour was observed throughout the observation days (> 37 percent); though it was reduced (26.9±2.64 percent) on days with higher temperatures and low humidity. Higher proportions of drinking (1.5±1.04 percent) and standing (20.8±4.63 percent) behaviours prolonged in such weather conditions, which were mostly during midday. The avoidance-related behaviour of the steers during handling varies, with the steers showing more avoidance and aggression in other weeks than some. These variations could however be traced back to the events of that particular day/time of handling. Only Weighing Box (WBS) and stepping (SS) scores differed (P<0.05) with genotype; with more calm NG steers (> 40 percent) and not kicking than the ND steers that were more vocal (20–60 percent) and kicking (> 5 percent). In addition, the weekly behavioural responses were reflected (P<0.05) in the measured cortisol, glucose and lactate. However, regardless of the prominent negative behaviour seen over time, the levels of the measured blood constituents continued to drop. Furthermore, steers of different genotypes displayed similar (P>0.05) response to the identical pre-slaughter conditions they were exposed to. However, steers that were Transport Group 1 (TG1) showed more avoidance (63.2 percent) pre-slaughter than those in TG2 (23.9 percent). Furthermore, all the steers that were in slaughter Group 2 (SG2) showed less avoidance behaviour than those in other groups. Vocalization was observed only for ND steers (5 percent), in TG1 and SG2. Some connections between the observed pre-slaughter activities and some behavioural and physiological changes of these steers were established; with TG1 and SG1 steers showing higher cortisol (140±14.50 and 175.9±17.24 nmol/L, respectively) and lactate (12.4±0.83 and 13.5±1.12 mmolL) levels than the other groups. Lastly, the muscle type, genotype, lairage duration, slaughter order and stress responsiveness have an effect on some meat quality characteristics of the two genotypes; with the L. dorsi muscle having highest WBSF (38.0±1.35N) than the Superficial pectoral muscle (Brisket muscle) (30.7±1.35N). Additionally, steers lairaged for a shorter time produced a L. dorsi with higher WBSF (41.6±2.34N) and a Brisket with lower TL (2.7±0.24 percent). It can therefore be concluded that the conditions and activities at the farm, during transportation, lairaging and slaughter at the abattoir have an influence on some behavioural and physiological changes and the quality of beef harvested from the Nguni and non-descript steers that were extensively-reared in natural pastures. However, the relationship patterns between these different conditions are not clear.
565

A Produção da periferia : das representações do espaço ao espaço de representação no Bairro Restinga - Porto Legre/RS

Gamalho, Nola Patrícia January 2009 (has links)
A presente pesquisa tem como objetivo compreender a produção do espaço e de suas representações no bairro Restinga - Porto Alegre/RS. São construções atravessados por materialidades, idéias, intenções e vidas, que formam, de forma contraditória, complexa e singular, o bairro. Sua produção material é indissociável de seus imaginários e, embora o espaço seja abstração, é também materialidade na vida das pessoas, envolvendo desde a ordem distante, do Estado e instituições, até a ordem próxima, dada pelas relações em redes ou de vizinhança. Nesse sentido, a produção do espaço é acompanhada por distintas (e contraditórias) representações, constituídas dentro e fora da Restinga. São imaginários que originaram com a produção do bairro e a remoção das malocas, reproduzindo hoje, sob outras roupagens, as distâncias sociais. Contudo, o morador que encontra no bairro o abrigo dentro de uma sociedade desigual, constitui valores positivos, dissociando-o dos imaginários que o estigmatizam. É nesse sentido, que fatos e idéias compõem o viver do morador da periferia, constituindo os vínculos entre sujeito e bairro, em elaborações constantes do espaço de representação. / This research aims to understand the production of space and its representations at Restinga neighborhood, in Porto Alegre, RS. They are constructions built by materialities, ideas, intentions and lives, which form, in a contradictory, complex and singular way, this neighborhood. Its material production is not separable from its imaginary and, although the space is abstraction, it is also materiality in people's lives, evolving from the distant order - State and institutions - to the nearer order, given by the relationships of neighborhood or in nets. Thus, the production of space is kept up with distinct (and contradictory) representations, formed inside and outside Restinga. These imaginaries were created with the production of the neighborhood and the removing of the poorest handmade houses, which reproduces, in another way, the social distances. However, the person who finds in the neighborhood a shelter inside an unequal society has positive values, undoing it from the imaginaries that stigmatize it. Facts and ideas compound the people from outskirts' lives, which build the links between individual and neighborhood, in constant elaborations of space of representation.
566

Story of two villages : physical, social and economic analysis of the landscape of Darkot and Sharmoli (Uttarakhand, Himalayan India) / Analyse physique, sociale et economique du paysage de Darkot et Sharmoli, deux villages d’Uttarakhand (Inde himalayenne)

Kapoor, Mohit 16 May 2018 (has links)
La thèse constitue une analyse physique, sociale et économique du paysage de deux villages himalayens de l’Inde (Uttarakhand) : Darkot et Sharmoli, par rapport au bourg voisin de Munsiyari qui jouit de fonctions administratives, commerciales et touristiques. Sharmoli est plus proche de Munsiyari, tandis que Darkot est distant de 7 km, et à une altitude plus basse. 173 ménages furent enquêtés. Les villages sont peuplés de Bhotias (classés Scheduled Tribes mais hindous de haute caste), Thakurs (haute caste) et ex-intouchables (Scheduled Castes). Les Bhotias pratiquaient le commerce avec le Tibet, et les autres castes étaient en position de dominés, mais à partir de 1962, avec l’arrêt du commerce et le transfert des terres des Bhotias aux Thakurs leurs anciens métayers, nombre de changements sont apparus dans la vie physique, sociale et économique des deux villages. Darkot est un village très ancien où les structures de caste, de religion et les hiérarchies demeurent très visibles dans les espaces publics comme privés, tandis que Sharmoli, construit il y a 4 ou 5 décennies, est moins marqué. Les habitants des deux villages adoptent de nouveaux types de maisons, avec de nouveaux matériaux de construction et un changement d’utilisation des pièces. Mais l’utilisation du sol à Sharmoli est marquée par le tourisme, au contraire de Darkot. L’agriculture dépasse le seuil de subsistance dans les deux cas. La majorité des hommes des deux villages est engagée dans les services (commerce) mais très peu comme fonctionnaires. L’âge moyen des actifs dans les villages dépasse 40 ans, ce qui signale l’émigration des jeunes vers les villes et la présence d’un grand nombre de retraités, notamment à Darkot. Le revenu par tête dépasse le seuil de pauvreté (3 $ par jour), mais pourrait être supérieur si les qualifications étaient supérieures et les opportunités dans les villages plus abondantes. Les femmes, notamment Bhotia, travaillent souvent dans l’artisanat, et les chambres d’hôte sont devenues une bonne source de revenu pour des ménages de Sharmoli. Globalement, le système clientéliste entre les Bhotias et les deux autres castes a disparu. Mais le paysage social de Darkot témoigne de plus d’orthodoxie dans l’espace public, puisque la religion, le temple, la caste jouent un rôle important en comparaison avec Sharmoli où dominent des fêtes modernes et profanes. La situation des femmes n’est pas très bonne dans aucun des villages, et des factions existent, notamment entre Bhotias et Thakurs. Au final, Darkot comme Sharmoli montrent les caractéristiques de la tradition et de la modernité, à travers l’analyse socio-économique des espaces privés et publics. / The thesis revolves around the physical, social and economic analysis of the landscape of two Himalayan villages in Uttarakhand, India: of Darkot and Sharmoli with respect to the core Munsiyari which exhibits administrative, market and tourism functions. Sharmoli is located near the core while Darkot is situated at a distance of 7 kms. and at a lower height than Sharmoli. The villages are inhabited by Bhotias (scheduled tribe as well as high-caste Hindus), Thakurs (high-caste Hindus) and lower-caste (scheduled castes) people. Around 173 families belonging to different castes are surveyed in the two villages. Bhotias used to practice trade with Tibet and the other two castes were their subordinates, but after 1962 with the stoppage of trade and transfer of Bhotias’ land to the tiller Thakurs, a lot of changes have come about in the physical, social and economic life of both the villages. The analysis of the landscape of Darkot and Sharmoli shows that Darkot is a very old village with the presence of elements of caste, religion, hierarchy etc. in its settlement pattern of private and public spaces, while Sharmoli has been constructed in the last 4-5 decades with a lower degree of influence of social and physical factors. The inhabitants of both the villages are adopting modern-design and new types of houses with contemporary construction materials while the uses of rooms are changing as per need. Land in the Sharmoli is used more for tourism-related activities which are absent in case of Darkot, while agriculture is far from subsistence level in both the villages. Majority of the male inhabitants of both the villages are engaged in service sector activities such as labour, business, private jobs etc. while very few are in government services. The average age of the earner in both the villages is beyond 40 years which shows the out-migration of young people to the towns and cities along with the presence of a large number of pensioners, esp. in Darkot. Though the villagers are not poor with regard to per-capita income, yet their earnings are lower (i.e. around $3 per day) because of poor educational qualifications and skills, along with lack of good opportunities in the villages. Women (esp. of Bhotia caste) are engaged in handicrafts while home-stays have come up as a new and good source of income for the families in Sharmoli. Overall, the patron-client relationship between Bhotias and the other two castes in economic terms has been loosened. The social landscape of Darkot depicts more orthodoxy in public space as religion, temple, caste play an important role in Darkot in comparison to Sharmoli where modern cultural and secular festivals dominate the landscape. The situation of women is not very good in both the villages while the caste factions (esp. among Bhotias and Thakurs) are clearly visible. Hence, both Darkot and Sharmoli depict characteristics of tradition and modernity depending upon the social and economic analysis of private and public spaces.
567

Historic Preservation of Pacific Northwest Beach Houses: A Study of Beach Houses along Tillamook County's Coast / Study of Beach Houses along Tillamook County's Coast

Donovan-Boyd, Adrienne K. 06 1900 (has links)
xiii, 207 p. : ill. (some col.), maps. A print copy of this thesis is available through the UO Libraries. Search the library catalog for the location and call number. / Preserving Pacific Northwest historic beach houses in coastal communities can often be a daunting task due to the complexities that arise when combining preservation, planning, development, and climatic hardships. Using Tillamook County's coastline as the study area, this thesis explores the historical development of Tillamook County's structures and the current barriers that exist when trying to preserve them. Historical discussions include the development of transportation routes, recreational amenities, and the evolution of coastal construction materials, along with historic local and regional planning decisions that helped shaped towns along Tillamook County's coastline. Following this historical discussion, current preservation challenges will be discussed as well as the recommendations for preserving and maintaining vernacular coastal beach houses of the Pacific Northwest. / Committee in Charge: Leland Roth, Chair; Donald Peting
568

Occupants' interaction with low-carbon retrofitted homes and its impact on energy use

Topouzi, Marina January 2015 (has links)
Current regulatory and other policy trends in housing refurbishment relating to low-carbon performance standards tend to involve complex technologies and systems as well as innovative solutions to achieve 80% emissions reduction in line with the UK national target for 2050. Indicators of domestic energy performance tend to assume ideal performance of materials, complex systems and services, and that they are installed to high standards and under specific conditions, as well as rational occupant behaviour and interactions. Previous studies exploring the influence of socio-technical factors on the UK's domestic energy use highlight that one of the main reasons for under-performance of individual projects is the lack of understanding of how people interact with domestic technology. Considering this, and given that there is still little evidence on deep refurbishments that implement low-carbon 'whole house' approaches in the UK, this research explored occupants' interaction with heating and ventilation measures as these were designed, installed and operated. The main concern was to identify the type of interactions that occur between occupants (social housing tenants) and building systems (mainly low-carbon heating and ventilation systems), and how that influences actual energy use. Using a sample of 26 social housing properties involved in the Retrofit for the Future competition in the UK, the study employed an socio-technical mixed methods approach, in which qualitative and quantitative empirical data were explored together, cross-checking occupants' 'doings' and 'sayings'. A combination of theories was used to analyse the complex interrelated factors involved in users' interaction with building systems. The analysis identifies key factors that affect significantly occupants' everyday practices and their interactions with the new measures: thermal comfort and pastexperiences with measures and controls; knowledge and skills (of both occupants and those involved in the project); design of the technical interventions (systems/measures) and quality of their installation. The findings from this research showed that active measures (such as intelligent and conventional heating controls, MVHR boosters, etc.) fostered direct interaction with active users when there were no design or installation faults. On the contrary, low-carbon measures that are designed and installed to be passive (such as MVHR systems operation) tend, in practice, to involve indirect interactions with active users. The research findings provide an insight into the 'in-use' factors, demonstrating to policy makers and implementers of mass refurbishment programmes the need for a framework where critical combinations of different measures and design solutions are targeted on specific house types, locations and households, in order to achieve maximum savings. Higher standards in installation of the new measures and improved quality control are also found to be a key part of refurbishment policies.
569

Prevence úrazů seniorů v domovech pro seniory / Prevention of injuries of elderly clients in retirements homes

STRAKOVÁ, Dana January 2014 (has links)
This diploma thesis focuses on the characteristics of aging process and old age, it deals with the prevention of injuries of elderly clients in retirement houses. While dealing with these problems the secondary literature is properly researched and analysed. The main aim of this thesis is to find out whether proper measures for prevention of injuries are taken in the selected retirement houses. The theoretical part of thesis focuses firstly on possible risks of injuries, secondary on the measures needed within the scope of prevention of injuries. Regarding the methodology the qualitative research is being used and it is based on interviews and observation of the researcher himself. In the practical part of the thesis the outcomes of the research are discussed. As the result there are proper measures taken by the retirement houses to lower the risks of injuries. This diploma thesis might be used for education and enhancement of awareness of the staff in the retirement houses.
570

Ocorrência, sorotipagem e rsistência antimicrobiana de Streptococcus suis em funcionários e ambente de abatedouro de sínos / Ocurrence, serotyping and antimicrobial resistence of Streptococcus suis in employees and environment of swine slaughterhouses

Soares, Taíssa Cook Siqueira [UNESP] 05 December 2014 (has links) (PDF)
Made available in DSpace on 2015-05-14T16:53:17Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-12-05Bitstream added on 2015-05-14T16:59:03Z : No. of bitstreams: 1 000829410.pdf: 511554 bytes, checksum: 8af199dd873a4a75c37c1be5aadce934 (MD5) / Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) / O presente estudo teve por objetivos determinar a ocorrência de Streptococcus suis em funcionários (portadores sadios) e ambiente de abatedouros com SIF do estado de São Paulo, Brasil, descrever a distribuição dos diferentes tipos do agente e o perfil de suscetibilidade aos antimicrobianos das linhagens isoladas, bem como pesquisar os fatores de risco associados à ocorrência do patógeno. Suabes de tonsilas de 139 funcionários e 261 suabes ambientais foram coletados para detecção de S. suis e seus tipos através das técnicas de monoplex e multiplex PCR, respectivamente. Não houve detecção de funcionários portadores sadios. S. suis foi isolado de 27,03% das amostras coletadas no abatedouro A; 17,31% no abatedouro B; 15,31% no abatedouro C; e 36,36% no abatedouro D. Diferença estatisticamente significativa (p<0,05) foi observada para as ocorrências de S. suis entre os abatedouros e entre as áreas de risco baixo, médio e alto da etapa de matança no abatedouro A. Os tipos 4 (20,00%), 5 (20,00%), 12 (20,00%) e 29 (20,00%) foram os mais frequentes seguidos pelos tipos 21 (10,00%) e 31 (10,00%). Os antimicrobianos mais eficazes foram amoxicilina com clavulanato (100,00%), doxiciclina (100,00%), ceftiofur (93,75%), ampicilina (81,25%) e cefalexina (75,00%). Multirresistência foi observada em 100,00% das linhagens isoladas. Os abatedouros e as diferentes áreas da etapa de matança podem ser fatores de risco para a ocorrência de S. suis, consequentemente, para infecção humana pelo patógeno. No entanto, é importante ressaltar que todos os funcionários estão expostos à infecção. O presente trabalho é o primeiro estudo epidemiológico realizado no Brasil acerca dos fatores de risco associados à ocorrência de S. suis envolvendo grande número de indivíduos pertencentes ao principal grupo de risco / The present study aimed to determine the occurrence of Streptococcus suis in employees (healthy carriers) and environment of swine slaughterhouses with federal inspection service of the state of São Paulo, Brazil, to describe the distribution of the different types of the agent and the antimicrobial susceptibility profile of the isolated strains, as well as to research the risk factors associated with the occurrence of the pathogen. Tonsillar swabs of 139 employees and 261 environmental swabs were collected for detection of S. suis and its types by monoplex and multiplex PCR, respectively. There was no detection of healthy carriers employees. S. suis was isolated from 27.03% of the samples collected at slaughterhouse A; 17.31% at slaughterhouse B; 15.31% at slaughterhouse C; and 36.36% at slaughterhouse D. Significant statistical differences (p<0.05) were observed for the occurrence of S. suis among slaughterhouses and among areas of low, medium and high risk of the slaughterhouse A. The types 4 (20.00%), 5 (20.00%), 12 (20.00%) and 29 (20.00%) were the most frequent followed by types 21 (10.00%) and 31 (10.00%). The most effective antimicrobials were amoxicillin-clavulanate (100.00%), doxycycline (100.00%), ceftiofur (93.75%), ampicillin (81.25%) and cephalexin (75.00%). Multidrug resistance was observed in 100.00% of the isolates. The slaughterhouses and the different areas of the pig slaughtering may be risk factors for the occurrence of S. suis and, consequently, for human infection. However, it is noteworthy that all employees are exposed to S. suis infection. This project is the first epidemiological study in Brazil about the risk factors associated with the occurrence of S. suis involving a large numbers of individuals belonging to the main risk group / FAPESP: 2011/50787-1

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