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Histologia do trato digestório do surubim-pintado (Pseudoplatystoma coruscans - Agassiz, 1829); Histology of the digestive tract of surubim-pintado (Pseudoplatystoma coruscans - Agassiz, 1829)

Cal, Josy Alvarenga
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 20/12/2006 PT
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O pintado (Pseudoplatystoma coruscans), também comumente chamado de surubim é um dos peixes mais apreciados pelo mercado consumidor brasileiro, devido à excelente qualidade do filé. No entanto, trabalhos sobre a morfologia do seu trato digestório são escassos. No presente trabalho, a descrição histológica do esôfago, estômago e intestino do pintado, visa contribuir e fornecer subsídios científicos para compreensão dos processos digestivos dessa espécie. Foram obtidas amostras do esôfago, estômago e de todas as regiões intestinais e posteriormente analisadas à microscopia óptica. No esôfago, observou-se epitélio de revestimento do tipo pavimentoso estratificado não-queratinizado, apresentando células epiteliais, mucosas e grande quantidade de células claviformes. A presença de células claviformes são indicadores de que este órgão está sujeito a lesão e lacerações, participando no sistema de defesa do organismo. O estômago do pintado constitui-se de um órgão em forma de J, distinguindo-se três regiões: cárdica, fúndica e pilórica. O epitélio de revestimento encontrado é do tipo colunar simples. A superfície epitelial é interrompida pelas criptas gástricas, no fundo das quais se abrem as glândulas gástricas...

Estudo do desenvolvimento do aparelho digestório de embriões bovinos (Bos indicus e Bos taurus) durante o período gestacional compreendido entre 10 e 60 dias; Study of development of digestive tract of bovine embryos (Bos indicus and Bos taurus) during gestational period between 10 and 60 days

Lima, Evander Bueno de
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 20/12/2007 PT
Relevância na Pesquisa
66.52%
O período embrionário se estende do 15º ao 45º dia de gestação na vaca, onde ocorre um rápido crescimento e diferenciação, durante o qual os principais órgãos, tecidos e sistemas são estabelecidos e as principais características são reconhecidas. Nos bovinos, a maioria dos órgãos e partes do corpo é formada entre a 2ª e a 6ª semana de gestação. Durante este período, o trato digestivo, os pulmões, o fígado e o pâncreas se desenvolvem do intestino primitivo, sendo estabelecidos os primórdios do sistema muscular, esquelético, nervoso e urogenital. Aproximadamente 25 a 45% dos embriões bovinos são perdidos até o processo final de implantação, no entanto, a literatura relacionada a sua organogênese é escassa, uma vez que crescem as inovações tecnológicas ligadas a reprodução bovina. Assim, julgamos oportuno e necessário um estudo sobre a biologia do desenvolvimento do aparelho digestório de embriões bovinos oriundos de monta natural, utilizando microscopia de luz e microscopia eletrônica de transmissão. Nossos resultados revelam que em embriões com idade gestacional estimada de 20 dias (CR 9,0 mm) ocorreu a formação do septo traqueoesofágico dividindo o intestino anterior no tubo laringotraqueal e esôfago...

Ultramorphology of digestive tract of Anticarsia gemmatalis (Hubner, 1818) (Lepidoptera : Noctuidae) at final larval development

Levy, Sheila Michele; Ferreira Falleiros, Angela Maria; Moscardi, Flavio; Gregorio, Elisa Aparecida; Toledo, Luis Antonio
Fonte: Universidade Estadual de Londrina (UEL) Publicador: Universidade Estadual de Londrina (UEL)
Tipo: Artigo de Revista Científica Formato: 313-321
ENG
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The digestive tract of insects is an important natural, physical, and chemical defense barrier against pathogen invasion. Certain. lepidopteran caterpillars are serious pests of agricultural crops and their biology has received much attention, but little is known about the larval noctuid gut. The morphological analysis of the digestive tract in Anticarsia gemmatalis under scanning electron microscopy (SEM) is a good model for studies about its defense mechanism. The material was fixed (2,5% glutaraldehyde solution; 0.1 M-phosphate buffer, pH 7.3), post-fixed (1% osmium tetroxide in the same buffer), dried at critical point, gold coated and analyzed in a SEM 515-Philips. A. gemmatalis digestive tract consists of a straight duct of varying length and diameter, subdivided in three main regions: the foregut formed by the oral cavity, pharynx, esophagus, and crop; the midgut that is the largest portion of the digestive tract without noticeable morphological differentiation along its length; and the hindgut that is morphologically differentiated in pylorus, ileum, colon, and rectum. Although the general morphology of the A. gemmatalis digestive tract is quite similar to the other Lepidoptera species, the anatomical array of the crop muscular layers is quite different comparing with the description for other larval insect.

Ultramorphology of the Digestive Tract of Paratrechina longicornis (Hymenoptera, Formicidae)

Solis, D. R.; Caetano, Flávio Henrique; Yabuki, A. T.; Moretti, T. C.; Bueno, O. C.
Fonte: California State University Publicador: California State University
Tipo: Artigo de Revista Científica Formato: 51-59
ENG
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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq); The digestive tract of ants is basically similar to that of other hymenopterans. Nevertheless, there are regions that vary considerably, and this could be used in the taxonomy of subfamilies and genera. Herein, we have morphologically described the digestive tract of Paratrechina longicornis (Latreille) through Scanning Electron Microscopy (SEM). Five queens and ten workers had their digestive tracts dissected and prepared for SEM analyses. It proved to be very similar to the digestive tract of Camponotus (Mayr) ants, except for the number of Malpighian tubules and rectal pads. Workers of P. longicornis have six tubules arranged in a single row and their queens presented eighteen tubules arranged in two rows. The number of tubules also varies according to the size of the specimens and ant species, although there seems to be no pattern to it. In the rectum, we found two rectal pads, a number different from that usually found in other Formicinae (six rectal pads). It seems that this number might be related to an ongoing process of general reduction of size and number of these pads. The obtained results may contribute to taxonomy and feeding behaviour studies.

Morphology and histochemistry of the digestive tract in carnivorous freshwater Hemisorubim platyrhynchos (Siluriformes: Pimelodidae)

Faccioli, Claudemir Kuhn; Chedid, Renata Alari; Amaral, Antonio Carlos do; Franceschini Vicentini, Irene Bastos; Vicentini, Carlos Alberto
Fonte: Elsevier B.V. Publicador: Elsevier B.V.
Tipo: Artigo de Revista Científica Formato: 10-19
ENG
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP); Processo FAPESP: 10/02842-0; The aim of this study was to characterize the morphology and histochemistry of the digestive tract of Hemisorubim platyrhynchos, a freshwater carnivorous catfish found in Neotropical region, using gross anatomy, light microscopy and transmission electron microscopy. This species presented a short and tubular esophagus with thick longitudinal folds. The esophageal mucosa was lined by stratified squamous epithelium containing epithelial cells, club cells and also numerous goblet cells, which secreted acidic and neutral mucins to protect and lubricate the epithelium. The stomach was a J-shaped saccular organ consisting of the cardiac, fundic and pyloric regions. The cardiac and fundic regions contained tubular gastric glands, whereas these glands were absent in the pyloric region. The gastric epithelial cells presented apical secretions that predominantly consisted of neutral mucins. The gastric musculature was, therefore, likely designed for retaining prey and the mechanical preparation of food. The intestine consisted of four regions: anterior, middle, posterior and rectal. The anterior intestine possessed thick folds to increase the surface area for absorption...

Morphometric parameters comparisons of the digestive tract of four teleosts with different feeding habits

Becker,Alexssandro Geferson; Gonçalves,Jamile Fabbrin; Garcia,Luciano Oliveira; Behr,Everton Rodolfo; Graça,Dominguita Luhers; Kurtz Filho,Mário; Martins,Tessie; Baldisserotto,Bernardo
Fonte: Universidade Federal de Santa Maria Publicador: Universidade Federal de Santa Maria
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/04/2010 EN
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The present study compared some morphometric parameters of the digestive tract of four teleosts with different feeding habits: traira (Hoplias malabaricus, carnivore), silver catfish (Rhamdia quelen, omnivore), hassar (Hoplosternum littorale, omnivore), and grass carp (Ctenopharyngodon idella, herbivore). The digestive tract was removed from fish collected from nature and fixed for some morphometric analyses, such as: intestinal quotient, intestinal area quotient, vilosity height, digestive somatic index, and hepatosomatic index. Grass carp showed the highest values of intestinal quotient and height vilosity. On the other hand, the intestinal area quotient was higher in traira than in the other species. The intestinal quotient can be used to estimate the feeding habit, and the intestinal area quotient, vilosity height and the relationships between digestive tract length and fish weight or digestive tract weight can provide important additional information to analyze the feeding habits.

Dominant culturable bacterial microbiota in the digestive tract of the American black vulture (Coragyps atratus Bechstein 1793) and search for antagonistic substances

Carvalho,Lydston Rodrigues de; Farias,Luiz Macêdo; Nicoli,Jacques Robert; Silva,Maria Clara Fernandes; Corsino,Andrea Teresa Santos Meira; Lima,Luiz André de; Redondo,Rodrigo Aparecido Fernandes; Ferreira,Paulo César Peregrino; Pinto,Maria Elizabeth Be
Fonte: Sociedade Brasileira de Microbiologia Publicador: Sociedade Brasileira de Microbiologia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/07/2003 EN
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Strict and facultative culturable anaerobic bacteria from the digestive tract of six American black vultures (Coragyps atratus Bechstein 1793) were isolated and identified. After capture, the birds received a non-contaminated diet for one week to eliminate possible allochthonous microorganisms. Then, specimens collected from tongue, stomach and intestines were weighed, submitted to decimal dilution in an anaerobic chamber, inoculated into culture media and incubated aerobically and anaerobically at 37ºC for enumeration, isolation and identification. Isolated bacteria were submitted to tests to detect possible antagonisms between them. The total bacterial population along the digestive tract ranged from 3.46 ± 0.39 log CFU/g in the stomach to 10.75 ± 0.37 log CFU/g in the distal intestine. Some bacteria were isolated for the first time from the digestive tract of C. atratus: Actinomyces bovis, Lactobacillus cellobiosus, Micrococcus luteus, Neisseria sicca, Clostridium bifermentans, Enterobacter agglomerans, Peptostreptococcus sp., Sarcina sp., Serratia odorifera, and Shigella flexneri. Associations between microorganisms were observed during isolation on two occasions, one involving A. bovis and N. sicca, and the other involving A. bovis and a Gram-negative rod. Hetero-...

Digestive tract microbiota in healthy volunteers

Zilberstein,Bruno; Quintanilha,Alina G; Santos,Manoel A A; Pajecki,Denis; Moura,Eduardo G; Alves,Paulo Roberto Arruda; Maluf Filho,Fauze; Souza,João Ary Ubriaco de; Gama-Rodrigues,Joaquim
Fonte: Faculdade de Medicina / USP Publicador: Faculdade de Medicina / USP
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/02/2007 EN
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PURPOSE: The aim of this study was to standardize the methods of sample collection of mucus from the digestive tract and to determine the microbiota in healthy volunteers from Brazil, collecting samples from the mouth, esophagus, stomach, duodenum, jejunum, ileum, colon, and rectum. METHODS: Microbiota of selected healthy volunteers from the oral cavity (n=10), the esophagus (n=10), the upper digestive tract (n=20), and the lower digestive tract (n=24) were evaluated through distinct collection methods. Collection methods took into account the different sites, using basic scraping and swabbing techniques, stimulated saliva from the oral cavity, irrigation-aspiration with sterile catheters especially designed for the esophagus, a probe especially designed for upper digestive tract, and a special catheter for the lower digestive tract. RESULTS: (i) Mixed microbiota were identified in the oral cavity, predominantly Gram-positive aerobic and anaerobic cocci; (ii) transitional flora mainly in the esophagus; (iii) Veillonella sp, Lactobacillus sp, and Clostridium sp in the stomach and duodenum; (iv) in the jejunum and upper ileum, we observed Bacteroides sp, Proteus sp, and Staphylococcus sp, in addition to Veillonella sp; (v) in the colon...

Life course models for upper aero-digestive tract cancer

Gupta, B.; Lalloo, R.; Johnson, N.W.
Fonte: Wiley Publicador: Wiley
Tipo: Artigo de Revista Científica
Publicado em //2015 EN
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Upper aero-digestive tract (UADT) cancers are collectively cancers of various human body sites, such as the oral cavity, pharynx, oesophagus and larynx. Worldwide, they are the fourth most frequent cancer type and the fourth most common cause of mortality from cancer. Many studies have shown that several chronic diseases, such as cancer, which occur more commonly in later adulthood, are influenced by social and psychological circumstances during birth, childhood, adolescence and early adult life. It is suggested that the build up of problematic circumstances throughout life is the cause of disease, rather than circumstances that happen at one point in time. UADT cancer is a chronic disease of complex multifactorial origin and most of the underlying exposures/risks cannot be considered as individual factors or in isolation, as they act at different levels, which differ from time to time. Thus, life-course epidemiology, rather than drawing false dichotomies between different risk factors of the underlying disease, attempts to integrate biological and social risk processes that cause the chronic disease. It studies how socially patterned exposures during all stages of life - childhood, adolescence and early adult - influence disease risk in adulthood and socio-economic position and hence may account for social inequalities in adult health and mortality. Furthermore...

Ultrastructural changes in the digestive tract of Deroceras reticulatum (Müller) induced by a carbamate molluscicides and by metaldehyde

Triebskorn, R.
Fonte: Universidade de Tubinga Publicador: Universidade de Tubinga
Tipo: ResearchPaper
EN
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Electron microscope investigations reveal different reactions of cells in the digestive tract of Deroceras reticulatum to intoxication with carbamate or metaldehyde molluscicides. All enterocytes are more strongly attacked by the carbamate compound Mesurol than by metaldehyde. The better efficiency of Mesurol is primarily attributed to its severe impact on nuclei, leading to other cell damage and finally to an increased macrophage reaction. Metaldehyde leaves the enterocyte functions more or less intact except for that of mucus cells. It activates mucus extrusion immediately after the onset of intoxication. This mucus serves to dilute the toxin, which passes through the digestive tract and is voided. The severe attack of metaldehyde on the immature mucus cells results in cessation of mucus production, leading to a fatal mucus deficiency in the digestive tract.

Organogenesis of the digestive tract in the white seabream, Diplodus sargus. Histological and histochemical approaches

Ortiz-Delgado, J.B.; Darias, M.J.; Cañavate, J.P.; Yúfera, M.; Sarasquete, C.
Fonte: Murcia : F. Hernández Publicador: Murcia : F. Hernández
Tipo: Artigo de Revista Científica Formato: application/pdf
ENG
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The ontogeny of the digestive tract of the white seabream, Diplodus sargus during the larval development up to day 45 post-hatching (dph) has been studied using histological and histochemical techniques. The oesophageal goblet cells appeared around 6 dph and contained neutral and acid mucosubstances (PAS/diastase-PAS and Alcian Blue pH 2.5 positive reactions). An incipient stomach can be distinguished from 2 dph but the first sign of gastric gland development was detected around 13-15 dph, increasing in number and size by 22-23 dph. Gastric glands were concentrated in the cardiac stomach region and they had a high content of protein rich in tyrosine, arginine and tryptophan. Acidophilic supranuclear inclusions related to pynocitosis of proteins, were already observed in the intestinal cells of the posterior intestine around 4-6 dph (exogenous feeding) and they were present until 25 dph. The intestinal mucous cells appeared between 15-18 dph and contained a mixture of neutral and acid mucosubstances/glycoconjugates, carboxylated ones being more abundant than the sulphated ones. The stomach and gastric glands were fully developed by the first month of life marking the beginning of digestive features characteristic of the juvenile stage. Around 4-6 dph...

A histological, histochemical and ultrastructural study of the digestive tract of Dentex dentex (Pisces, Sparidae)

Carrassón, M.; Grau, A.; Dopazo, L.R.; Crespo, S.
Fonte: Murcia : F. Hernández Publicador: Murcia : F. Hernández
Tipo: Artigo de Revista Científica Formato: application/pdf
ENG
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Dentex dentex has a short esophagus, a large caecal type stomach, three to six pyloric caeca and a short intestine. Light and electron microscope studies reveal that the esophageal mucosa displays primary and secondary folds, a stratified squamous epithelium with fingerprint-like microridges alternating with a few zones formed by a single layer of columnar cells with apical microvilli. Only primary folds are present in the stomach, which is rich in simple tubular glands, these being absent in the pyloric valve. Two cell types occur in the gastric glands, one with a well developed apical intracytoplasmic membrane system consisting of a vesicular network of smooth membranes, and the other with a supranuclear tubulovesicular system. Pyloric caeca and anterior and posterior intestine mucosae display the same pattern of folding, with primary and secondary folds, without following a definite pattern in their orientation. In the rectum, the folds are oriented longitudinally. Small dense particles containing chylomicrons appear in groups in the intercellular spaces of the caecal and anterior intestinal epithelia. Eosinophilic granular cells (mast cells) appear along the digestive tract mainly within the stratum compactum. Histochemical studies reveal no differences in the composition of goblet cell mucus along the digestive tract. No histochemical differences were detected between enterocytes of the intestine...

Morphological characteristics of the digestive tract of Schizodon knerii (Steindachner, 1875), (Characiformes: Anostomidae): An anatomical, histological and histochemical study

Santos,Marcella L. Dos; Arantes,Fábio P.; Santiago,Kleber B.; Santos,José E. Dos
Fonte: Academia Brasileira de Ciências Publicador: Academia Brasileira de Ciências
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2015 EN
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The digestive tracts of 44 specimens of Schizodon knerii were studied using anatomical, histological and histochemical techniques. The mouth has terminal position, the lip epithelium is squamous stratified with mucous, claviform cells and taste buds, teeth have an incisive form and the tongue has a stratified squamous epithelium with mucous cells and taste buds. The oropharynx cavity is formed by gill apparatus and pharyngeal teeth. The oesophagus presented pleated mucosa, a stratified squamous epithelium with mucous cells, oesophageal glands and taste buds. The stomach presented cardiac, fundic and pyloric regions, simple prismatic epithelium with tubular glands, with none in the pyloric region. The intestine contains 11-15 pyloric caeca, a simple prismatic epithelium with brush border, goblet cells and lymphocytes. Mucosal cells, oesophageal glands and goblet cells reacted positively to PAS, amylase + PAS, Ab pH 2.5 and Ab pH 0.5. Gastric prismatic cells reacted positively to PAS, amylase + PAS, but only those in the pyloric region reacted positively to Ab pH 2.5 and Ab pH 0.5. The results improve the understanding of the anatomy of S. knerii feeding habits and the presence of mucosubstances in the epithelium, highlights the importance of glycoproteins for passing food through the digestive tract.

Alterações do trato digestório de cães da raça Golden Retriever afetados pela distrofia muscular; Changes of the digestive tract of Golden Retriever dogs affected by muscular dystrophy

GERGER, Alida A.C.; SOUZA, Carolina C.; MARTINS, Daniele S.; GAIAD, Thaís; BRÓLIO, Marina P.; LUPPI, Marta R.; AMBRÓSIO, Carlos Eduardo; MIGLINO, Maria Angélica
Fonte: Colégio Brasileiro de Patologia Animal - CBPA Publicador: Colégio Brasileiro de Patologia Animal - CBPA
Tipo: Artigo de Revista Científica
POR
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O modelo experimental canino Golden Retriever portador da Distrofia Muscular (GRMD) é o melhor substituto entre os modelos animais para estudar a Distrofia Muscular de Duchenne. Além da musculatura estriada, a doença pode afetar a musculatura estriada cardíaca e a musculatura lisa, e desta forma, o funcionamento do trato digestório, já que o músculo liso é o elemento primário dos órgãos tubulares. Através de estudo morfológico descritivo, o objetivo deste trabalho foi verificar se a distrofia muscular afeta a arquitetura geral do trato digestório e como se dispõe sua estrutura muscular em animais afetados. Foram realizadas avaliações descritivas macro e microscópicas com colorações de Hematoxilina-Eosina, Tricrômio de Masson e Picrosirius. Entre os resultados apresentados, verificou-se que o esôfago e o fígado dos animais afetados encontraram-se alterados, assim como o estômago não ocupava seu lugar habitual. O músculo diafragma apresentava-se atrofiado e diferenças histológicas foram encontradas na camada muscular do sistema gastrointestinal, em geral. Outras estruturas do tubo digestório de GRMDs apresentaram-se de maneira similar a de um animal normal.; The experimental canine model Golden Retriever carrier of Muscular Dystrophy (GRMD) is the best substitute of animal models to study Duchenne Muscular Dystrophy. Above striated muscle...

Fungal flora of the digestive tract of Rhodnius prolixus, Rhodnius neglectus, Diptelanogaster maximus and Panstrongylus megistus, vectors of Trypanosoma cruzi, Chagas, 1909

Moraes,Aurea Maria Lage de; Junqueira,Angela Cristina Vieira; Celano,Valéria; Costa,Gisela Lara da; Coura,José Rodrigues
Fonte: Sociedade Brasileira de Microbiologia Publicador: Sociedade Brasileira de Microbiologia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/12/2004 EN
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This paper reports a study on the mycobiota in the digestive tract of four important species of triatomines: Rhodnius prolixus, R. neglectus, Diptelanogaster maximus and Panstrongylus megistus. The digestive tracts of 90 adults and 425 nymphs of these four triatomine species were studied and 365 fungal strains were isolated. The genera with the greatest number of species were Aspergillus, Penicillium (14 species in each genus), Acremonium and Cladosporium (three species in each genus), and the most frequent species, in decreasing order, were Aspergillus awamori, Penicillium corylophilum, Cladosporium herbarum and Aspergillus niger. It was concluded that, among the isolated fungi, Aspergillus niger and Penicillium corylophilum might be part of the natural flora of the digestive tract of triatomines.

Ulteriori isolamenti di attinomiceti dall'apparato digerente di api sane e di api malate da forma di "Mal nero"; Further isolation of actinomycetes from the digestive tract of healthy bees and bees from a diseased form of ill-black

Amici, Alba maria; Vecchi, Maria Adelaide
Fonte: INRA - Instituto Nacional de Investigação Agronômica da França Publicador: INRA - Instituto Nacional de Investigação Agronômica da França
Tipo: Journal Article-postprint
IT; ENGLISH
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Following preceding papers on the isolation of some Actinomycetes strains in the digestive tract of bees affected with a particular type of "Black disease", the AA. have investigated their presence in healthy bees, as this kind of organisms had never been detected before in the digestive tract. Healthy and sick bees taken from two hives of a same apiary, one normal and the other affected with « Black disease » for 3 years and presenting a considerable and constant mortality, were examined. Actinomycetes were isolated from the healthy as well as from the sick bees. The AA. conc1ude that Actinomycetes are not responsible for « Black disease» for the following reasons: I) Actinomycetes are present in healthy and sick bees in practically the same percentage. 2) Actinomycetes may not be isolated from all the sick bees. 3) The species of Actinomycetes isolated from the sick bees are many and different.

Microbiota no trato digestivo em voluntários saudáveis; Digestive tract microbiota in healthy volunteers

Zilberstein, Bruno; Quintanilha, Alina G; Santos, Manoel A A; Pajecki, Denis; Moura, Eduardo G; Alves, Paulo Roberto Arruda; Maluf Filho, Fauze; Souza, João Ary Ubriaco de; Gama-Rodrigues, Joaquim
Fonte: Universidade de São Paulo. Faculdade de Medicina Publicador: Universidade de São Paulo. Faculdade de Medicina
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; ; Formato: application/pdf
Publicado em 01/02/2007 ENG
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OBJETIVO: Padronizar os métodos de coleta do muco do trato digestivo e determinar a microbiota, em voluntários saudáveis no Brasil, coletando amostras da boca, esôfago, estômago, duodeno, jejunos e íleo, cólons e reto. MÉTODOS: A microbiota de voluntários saudáveis foi avaliada através de diferentes métodos de coleta: cavidade oral (n=10 voluntários), do esôfago (n=10), do trato digestivo alto (n=20) e do trato digestivo baixo (n=24). Métodos de coleta foram adotados em cada sítio restrito, usando derramar saliva, técnica de esfregar a mucosa e saliva estimulada da cavidade oral, irrigação-aspiração, cateteres específicos designados para o esôfago, sonda especial para o trato digestivo alto e cateteres especiais para o trato digestivo baixo. RESULTADOS: Identificados: (i) na cavidade oral, microbiota mista, predominando cocos aeróbios e anaeróbios Gram positivos; (ii) no esôfago, flora transitória; (iii) no estômago e duodeno, Veillonella sp, Lactobacillus sp and Clostridium sp; (iv) no jejuno e íleo proximal, Bacteróides sp, Proteus sp and Staphilococcus sp, além da Veillonella sp ; (v) no colon, foi revelada a presença "não patogênica" da bactéria anaeróbica Veillonella sp numa concentração média de 10(5) unidades formadoras de colônia...

Diatomáceas no trato digestivo de três espécies de camarão da pesca artesanal marinha - Santa Catarina - Brasil; Diatoms from the digestive tract of three shrimps species in the marine fishery - Santa Catarina - Brazil

Souza-Mosimann, Roseli Maria de; Universidade Federal de Santa Catarina; Felício-Fernandes, Gil; Universidade Federal de Santa Catarina; Laudares-Silva, Roselane; Universidade Federal de Santa Catarina; Felício-Fernandes, Luciano; Universidade Federal d
Fonte: Universidade Federal de Santa Catarina Publicador: Universidade Federal de Santa Catarina
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; ; ; Formato: application/pdf
Publicado em 01/01/1993 POR
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Artemesia longinaris Bate; Pleoticus muellerii Bate e Trachypenaeus constrictus Stimpson são espécies importantes na pesca artesanal marinha na Baía de Tijucas (27°13' 30"S - 27°17'54"S e 48°30'36"E - 48°32'24"W). O material para análise qualitativa das diatomáceas no trato espécies de camarão estudadas foi obtido a partir de sub-amostragens de arrastos comerciais no local. Foram identificados 44 táxons infra-genericos distribuídos em 14 famílias. Coscinodiscaceae foi a família melhor representada com 25% do total de táxons identificados. Coscinodiscus wailesii Gran & Angst é citado pela primeira vez para o Estado de Santa Catarina. Do total de táxons infra-genéricos 17,7% são comuns às três espécies de camarão estudadas; 73,3% ocorrentes em A. longinaris, 48,8% em P. muellerii e 31,1% em T. constrictus.; Artemesia Longinaris Bate. PLeoticus muellerii Bate and Trachypenaeus constrictus Stimpson are importants species in the marine fishery in the Baia de Tijucas (27°17'54" and 48°30"36"E - 48°32'24"W). The material for the diatoms analysis from the digestive tract of the species of shrimp studied was obtained from sub-samples of the comercial drags. There were identified 44 taxa distributed in 14 families. The best represented familie is Coscinodiscaceae with 25% from the total of taxa identified. Coscinodiscus wailesii Gran & Angst is the new record for Santa Catarina 8tate. From the total of taxa identified...

Fungal flora of the digestive tract of Triatoma infestans (Hemiptera: Reduviidae) from Argentina

Marti,G. A.; García,J. J.; Cazau,M. C.; López Lastra,C. C.
Fonte: Boletín de la Sociedad Argentina de Botánica Publicador: Boletín de la Sociedad Argentina de Botánica
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/12/2007 EN
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A survey of the fungal microbiota of the digestive tract of Triatoma infestans (Klug) (Hemiptera: Reduviidae) adults was carried out. Insects captured in the field from different provinces in Argentina, as well as individuals reared in artificial colonies, were used for dissection. Axenic cultures of the fungal species were identified and were deposited with mycological collections at La Plata , Argentina. A total of 33 fungal species, with the exception of three that were mycelia sterilia, belonging to 11 genera were identified. Thirty two species belonged to Ascomycota (Eurotiomycetes and Sordariomycetes) and one to Zygomycota (Zygomycetes). The genera with the greatest number of species were Penicillium (15), Aspergillus (5), and Cladosporium (2). Among the isolated fungi, some of the species were entomopathogenic or pathogens of humans and other animals.

Morphology and histology of P. argentinus (Crustacea, Decapoda, Caridea) digestive tract

Sousa,Liliana; Petriella,Ana María
Fonte: Biocell Publicador: Biocell
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/08/2006 EN
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66.52%
This work describes the morphology and histology of the P. argentinus digestive tract. The foregut comprises the mouth, oesophagus, and stomach and is lined by a simple cylindrical epithelium overlain by cuticle. There are tegumental glands in the oral region and in the first portion of the oesophagus and of the hindgut. The cardiac stomach is an oval dorsal sac in the cephalothorax and has no calcified structures. The pyloric stomach comprises an upper chamber and a lower gland filter. The filter consists of an outer row of elongated setae and an inner row of dorsally curved setae forming longitudinal channels 16-18µm wide. The midgut runs from the dorsal chamber of the pyloric stomach to the sixth abdominal somite without caeca. The hindgut runs from the sixth abdominal somite to the ventral anus. The mid-gut epithelium comprises dominant cylindrical cells and small undifferentiated cells in the first portion. The hindgut wall presents longitudinal folds, conspicuous muscular bundles, and a folded cuticle. The digestive tract of P. argentinus is basically similar to that of most of decapods. The absence of calcified structures in the stomach and the width of the longitudinal channels in the filter are related to the predominantly detritivorous diet.