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Registros recuperados: 31
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Analyse bacteriologique de l'eau par mesure potentiometrique de la reduction de l'acide lipoique ArchiMer
Charriere, G; Jouenne, T; Junter, G.
A simple potentiometric technique to detect and enumerate the bio-indicators of water contamination is described. The technique consists in measuring the redox potential of a specific culture medium saturated with oxygen where bacteria are incubated in presence of lipoic acid (LA). These micro-organisms reduce LA to dihydrolipoic acid, giving rise to an important potential drop in the system. This potentiometric "signal" reveals the presence of active metabolic bacteria in the medium. The major assets of potentiometric measurements in presence of LA lies in the reliability and intelligibility of the results (the redox phenomenon being qualitatively and quantitatively studied), associated to a very simple technology. Futhermore, this technique is perfectly...
Tipo: Text Palavras-chave: Bacteria; Pollution indicators; Water quality; Microbial contamination; Indicator species; Pollution detection; Redox potential; Titration.
Ano: 1984 URL: http://archimer.ifremer.fr/doc/1984/acte-1007.pdf
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Autologous transplant: microbial contamination of hematopoietic stem cell products BJID
Almeida,Igor Dullius; Schmalfuss,Tissiana; Röhsig,Liane Marise; Goldani,Luciano Zubaran.
Hematopoietic progenitor cells from peripheral blood (HPCPB) are commonly used for autologous and allogenic transplants in patients with most various onco-hematological diseases, and despite the utilization of sterile techniques during collection and processing of these products, bacterial contamination can occur. This study aimed to investigate the microbial contamination of HPCPB products. Microbial cultures of 837 HPCPB products between the year 2000 and 2009 were retrospectively analyzed to determine the incidence of culture positivity and identify the main organisms that cause contamination. The microbiological studies were performed with an automated system (BacT/Alert® bioMérieux Corporate). Thirty-six (4.3%) of 837 microbial cultures were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Autologous transplant; Hematopoietic stem cell products; Microbial contamination; Quality control; Bacterial contamination.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702012000400006
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Avaliação microbiológica de amêndoas de castanha-do-brasil em usinas de beneficiamento no Acre. Repositório Alice
SOUZA, J. M. L. de; CARTAXO, C. B. da C.; LEITE, F. M. N.; REIS, F. S..
O objetivo desse estudo foi identificar os microrganismos responsáveis pela qualidade sanitária de castanha-do-Brasil em indústrias de processamento de castanha-do-brasil no Acre. Foram coletadas amostras nos meses de agosto de 2001 a maio de 2002, em cinco etapas do processamento.
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Castanha do brasil; Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Castanha do pará; Bertholletia excelsa; Microbiologia; Análise bacteriológica; Fruto; Qualidade; Processamento; Contaminação fúngica; Micotoxina; Aflatoxina; Aspergillus flavus; Brazil nuts; Fruit quality; Microbial contamination; Processing technology; Fungi; Mycotoxins; Aflatoxins; Nuez del Brasil; Calidad de la fruta; Contaminación microbiana; Micotoxinas; Aflatoxinas; Tecnología de procesamiento.
Ano: 2003 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/502643
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Avaliação microbiológica de amêndoas de castanha-do-brasil em usinas de beneficiamento no Acre. Infoteca-e
SOUZA, J. M. L. de; CARTAXO, C. B. da C.; LEITE, F. M. N.; REIS, F. S..
Nativa da Região Amazônica, a castanheira (Bertholletia excelsa H.B.K.) é considerada uma das maiores riquezas nos estados que formam a Amazônia Brasileira. Um dos grandes problemas na conservação da castanha-do-brasil deve-se ao crescimento de fungos produtores de aflatoxinas e bactérias patogênicas, por causa das condições de umidade relativa e temperatura elevadas a que é submetida desde o momento da queda do ouriço. Assim, buscou-se identificar, em indústrias de processamento de castanha-do-brasil no Acre, os microrganismos responsáveis pela qualidade sanitária, especialmente os do grupo coliformes, bactérias mesáfilas, bolores e leveduras. Foram coletadas amostras nos meses de agosto de 2001 a maio de 2002, em cinco etapas do processamento. As...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) Palavras-chave: Castanha do brasil; Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Castanha do pará; Bertholletia excelsa; Microbiologia; Análise bacteriológica; Fruto; Qualidade; Processamento; Contaminação fúngica; Micotoxina; Aflatoxina; Aspergillus flavus; Brazil nuts; Fruit quality; Microbial contamination; Processing technology; Fungi; Mycotoxins; Aflatoxins; Nuez del Brasil; Calidad de la fruta; Contaminación microbiana; Micotoxinas; Aflatoxinas; Tecnología de procesamiento.
Ano: 2004 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/501670
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Caracterización de la calidad de las aguas y sedimentos del Río Atacames 2002 OceanDocs
Rodríguez de Morán, A..
La presente investigación se desarrolló como parte de Estudio de calidad de las aguas de los ríos de la Provincia de Esmeraldas durante mayo del 2002, como aporte del INOCAR a la Ilustre Municipalidad del Cantón Atacames, Institución que se encuentra realizando esfuerzos en los planes de operación para cumplir con la concepción del estado ecuatoriano sobre protección ambiental. Se presenta y evalúa los resultados obtenidos tanto en el estudio de calidad de las aguas como de los sedimentos del río Atacames en la Provincia de Esmeraldas, tomando en consideración la distribución y comportamiento superficial de parámetros físico, químicos y microbiológicos en un área que abarca entre 15 kilómetros aguas arriba y su desembocadura en el Océano Pacífico. Durante...
Tipo: Journal Contribution Palavras-chave: Water quality; River water; Sediments; Oxygen; Petroleum hydrocarbons; Microbial contamination; Pollution effects; Organic wastes; Sewage; Water quality; Microbial contamination; Organic wastes; Oxygen; Sewage; Http://aims.fao.org/aos/agrovoc/c_16061; Http://aims.fao.org/aos/agrovoc/c_37547; Http://aims.fao.org/aos/agrovoc/c_35237; Http://aims.fao.org/aos/agrovoc/c_5477; Http://aims.fao.org/aos/agrovoc/c_7007.
Ano: 2003 URL: http://hdl.handle.net/1834/2373
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Characterization of Vibrio isolated from Crassostrea gigas spat suffering summer mortality outbreaks (slides) ArchiMer
Gay, Melanie; Renault, Tristan; Le Roux, Frédérique.
The pathogens related to summer mortality outbreaks are a herpes virus and two bacterial strains one belonging to Vibrio splendidus biovar II and the other to Vibrio splendidus spp. However, the feature pathogen/opportunist of these strains is still unknown. Several strains belonging to the genus Vibrio have been identified as pathogen for different mollusk species. In the context of the French program Morest, experiments of cohabitation have been used to demonstrate the potential presence of a transmissible infectious agent in batches of oysters suffering from summer mortality outbreaks. More than one hundred Vibrio strains have been isolated from these experiments. These strains have been phenotypically and genotypically characterized. Their virulence...
Tipo: Text Palavras-chave: Vibrio splendidus; Vibrio lentus; Crassostrea gigas; Summer; Spat; Pathogen; Disease transmission; Oyster culture; Mortality; Microbial contamination; Oysters.
Ano: 2003 URL: http://archimer.ifremer.fr/doc/2003/acte-3343.pdf
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Comparaison de methodes directes (microscopiques) et indirectes (par mise en culture) dans l'evaluation d'une pollution bacterienne d'origine fecale. Etude preliminaire ArchiMer
Munro, P; Bianchi, M.
Cells of two serotypes of Escherichia coli (O26B6 and 0111B4) were counted using epifluorescence and immunofluorescence microscopy (nonavalent serum) and plate count on specific medium. Values from indirect counts were 10 fold smaller than those from both microscopic counts. In a sample of sea water from an area receiving a fecal pollution, the highest number of bacteria was obtained by epifluorescence microscopy. In that case, the number of cells counted by immunofluorescence microscopy was 10 fold smaller than the number of bacteria able to grow on the medium. It could be due to: the diversity of the natural community, the possibility to other bacteria than E. coli to grow on the used culture medium, the restrictiveness of the serum for "pathogenic...
Tipo: Text Palavras-chave: Escherichia coli; Bacteria; Microbiological culture; Pathogenic bacteria; Microbial contamination; Bacterial counters; Fluorescence microscopy; Bacteria collecting devices; Indicator species.
Ano: 1984 URL: http://archimer.ifremer.fr/doc/1984/acte-1001.pdf
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Determination du profil des flores bacteriennes des zones littorales. Application a l'evaluation de l'impact des rejets ArchiMer
Bunetel, L; Segui, A; Guerin, J; Lerman, I; Cormier, M.
The principle of this method is to evaluate, by counts exercised upon selective media, the relative importance of the different bacteria families in the flora of the coastal waters. It is important to separate the contaminant species and the commensal species in the marine environment. Ten culture media distributed into four categories (selective, non selective, saline and non saline) were examined by numeration. Counts were transferred on a diagram allowing to plot down a profile of bacterial flora of water sampled from a given geographical area. The profiles are arranged by a classification method. The sampling points with similar or adjoining profiles were assembled and marked on the chart. In this way, the authors obtained areas representing the impact...
Tipo: Text Palavras-chave: Bacteria; Coastal waters; Microbiological culture; Sewage disposal; Microbial contamination; Bacterial counters; Bacteria collecting devices.
Ano: 1984 URL: http://archimer.ifremer.fr/doc/1984/acte-1004.pdf
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Dynamics and diversity of the bacterial community during the spontaneous decay of açai (Euterpe oleracea) fruits BJM
Moura,Fábio Gomes; Graças,Diego Assis das; Santos,Agenor Valadares; Silva,Artur Luiz da Costa da; Rogez,Hervé.
Abstract The biodiversity and evolution of the microbial community in açai fruits (AF) between three geographical origins and two spontaneous decay conditions were examined by applying culture-independent methods. Culture-independent methods based on 16S rRNA from fifteen samples revealed that Proteobacteria, Firmicutes, Actinobacteria, Bacteroidetes and Acidobacteria were the most abundant phyla. At the genus level, Massilia (taxon with more than 50% of the sequences remaining constant during the 30 h of decay), Pantoea, Naxibacter, Enterobacter, Raoultella and Klebsiella were identified, forming the carposphere bacterial microbiota of AF. AF is fibre-rich and Massilia bacteria could find a large quantity of substrate for its growth through cellulase...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Food; Microbial contamination; High-throughput partial 16S rRNA gene sequencing; Diversity.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000500025
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Estimation des niveaux de pollution organique et bactérienne des eaux à proximité des berges de la ville d'Abidjan (lagune Ebrié-Côte d'Ivoire) OceanDocs
Guiral, D.; Kouassi, A.M.; Arfi, R..
Trois campagnes sur l'ensemble de la zone urbaine de la lagune Ebrié (Abidjan, Côte d'Ivoire)ont été réalisées à trois saisons caractéristiques de l'hydroclimat lagunaire (grande saison sèche, grande saison des pluies, petite saison des pluies et crue fluviale)pour estimer les niveaux de pollution organique (seston, ions, ammonium et orthophosphates) et bactérienne ( E.coli et C.perfringens) des eaux à proximité des berges.Celles-ci présentent une forte eutrophisation caractérisée par des concentrations en permanence très élevées pour N-NH4 et lors de la grande saison sèche pour P-PO4. Les charges minérales solides s'accroissent en période de forte dessalure et plus particulièrement lors de la grande saison des pluies.A l'opposé, les charges organiques...
Tipo: Journal Contribution Palavras-chave: Water pollution; Microbial contamination; Embankments.
Ano: 1993 URL: http://hdl.handle.net/1834/5735
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Estudiosd bacteriológicos en la Ciénaga Grande de Santa Marta, Colombia OceanDocs
Jeske, R..
Mientras predominan las aguas salobres en la Ciénaga Grande se destacan las formas bacterianas halófilas. Durante la época de lluvias (invierno, disminuye la salinidad, sin embargo las formas halófilas aumentan en número. La reproducción de bacterias de agua dulce se inicia sólo cuando la salinidad llega bajo un valor de un 10°/o/o. Estas alcanzan su valor máximo temporáneo en salinidades de un 3°/o/o. Al mismo tiempo disminuyen las formas halófilas. Observaciones sobre contaminación fecal se realizaron en las aguas de la Ciénaga. Como indicador se utilizó Escherichia coli. En las inmediaciones de los pueblos de pescadores es posible detectar cierta contaminación. En cambio, en el resto de la Ciénaga, en contados casos se observa E. coli. La presencia de...
Tipo: Journal Contribution Palavras-chave: Coastal lagoons; Estuaries; Microbiological analysis; Microbial contamination; Estuaries; Microbial contamination; Coastal lagoons; Microbiological analysis; Http://aims.fao.org/aos/agrovoc/c_2673; Http://aims.fao.org/aos/agrovoc/c_37547; Http://aims.fao.org/aos/agrovoc/c_1697; Http://aims.fao.org/aos/agrovoc/c_25302.
Ano: 1976 URL: http://hdl.handle.net/1834/3322
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Etude experimentale de la disparition de coliformes fecaux d'un effluent urb ain en milieu marin ArchiMer
Bonnefont, J; Lelong, P; Martin, Y.
The authors studied survival of faecal coliform (decrease rate + T90) in experimental devices (closed or continuous flow systems) using various dilutions of urban sewage in sea-water. Survival appears to be high (T90 between 12 to 81 h). Dilution level of sewage and organic matter contents seems to be important to explain the decrease of faecal coliforms observed in these experiments.
Tipo: Text Palavras-chave: Bacteria; Microbial contamination; Pathogenic bacteria; Survival; Waste water; Marine pollution.
Ano: 1984 URL: http://archimer.ifremer.fr/doc/1984/acte-1009.pdf
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Evaluation of the PetrifilmTM and TEMPO® systems and the conventional method for counting microorganisms in pasteurized milk Ciênc. Tecnol. Aliment.
Cirolini,Andréia; Baseggio,Andressa Mara; Miotto,Marília; Ramos,Roberta Juliano; Cattani,Cristhiane Stecanella de Oliveira; Vieira,Cleide Rosana Werneck.
New microbiological methods have been developed and commercialized, but their performance must be guaranteed. The aim of the present study was to evaluate the PetrifilmTM and TEMPO® systems compared to the conventional method for counting microorganisms in pasteurized milk. A total of 141 samples of pasteurized milk were analyzed by counting mesophilic aerobic, Coliforms at 35 ºC, Coliforms at 45 ºC, and Escherichia coli microorganisms. High correlation was found between the methods for counting Coliforms at 35 ºC, but low correlation was found for counting mesophilic aerobic, Coliforms at 45 ºC, and Escherichia coli. No significant statistical difference was found among the three methods for counting Coliforms at 35 ºC; however, the mean counts of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Alternative methods; Milk; Microbial contamination; Conventional methods.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612013000400026
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Fluorescent antibody enumeration of Vibrio cholerae in the marine environment. ArchiMer
Brayton, P; Roszak, D; Palmer, L; Huq, S; Gimes, D.
From microcosm studies, V. cholerae and related potential human pathogens enter a viable but nonculturable state. Direct viable counts by epifluorescent microscopy consistently remain higher than corresponding plate counts. Thus, the assumption that pathogens "die-off" or "decay" in the marine environment must be re-evaluated, since stressed or nutrient-starved cells are unable to grow and be enumerated by standard plate count methods. Indirect immunofluorescent microscopy offers a more sensitive detection system for environment sampling for human pathogens. Field indicate that cultures positive for V. cholerae O1 are also positive by fluorescent antibody staining; however, the reverse was not necessarily true. By adapting epifluorescent techniques for...
Tipo: Text Palavras-chave: Vibrio cholerae; Bacteria; Experimental research; Marine environment; Pathogenic bacteria; Microbial contamination; Fluorescence microscopy; Bacterial counters; Pollution detection.
Ano: 1984 URL: http://archimer.ifremer.fr/doc/1984/acte-1000.pdf
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High frequency of Ascaris lumbricoides in public playgrounds in central Brazil. Repositório Alice
MARINHO, R. F.; SÁ, L. C. F. E.; CASTRO, N.; GURGEL-GONÇALVES, R.; MALDONADE, I. R.; MACHADO, E. R..
This study analyzed the occurrence of intestinal parasites in playgrounds in the Federal District of Brazil(DF) in 2015 2016 and were processed using he Willis and Hoffman methods.
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Parasites; Microbial contamination; Sand; Ascaris lumbricoides.
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1078366
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Implantation et survie de Campylobacter jejuni/coli chez la moule Mytilus edulis ArchiMer
Minet, Jacques; Sauvager, F; Cormier, M.
Illnesses due to marine bivalvia consumption are mostly associated with viruses as causative agents. In more than the half of cases, this agent remains unidentifies, nevertheless. So far as bacteria are concerned, Salmonella are found firstly. Campylobacters represent a major cause of gastrointestinal disease, with Salmonella, among humans. Whether campylobacteriosis may be acquired from shellfishes remains unclear. We undertook to comparatively appreciate the survival of Campylobacter jejuni/coli and Salmonella typhimurium in seawater and contaminated mussels. Bacterial enumerations where performes using microbial cultures and specific (with immunofluorescence) direct viable counts (of substrate responsive bacteria). During laboratory contamination...
Tipo: Text Palavras-chave: Campylobacter coli; Campylobacter jejuni; Mytilus edulis; Bivalvia; Pathogenic bacteria; Seafood; Microbial contamination; Pollution effects; Bacteria; Sea water; Survival.
Ano: 1992 URL: http://archimer.ifremer.fr/doc/1992/acte-1606.pdf
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Incidences de la modification de la circulation des eaux sur l'hydrochimie et le degré de contamination bactérienne d'un estuaire eutrophe tropical OceanDocs
Guiral, Daniel; Kouassi, Aka Marcel; Arfi, Robert.
Pour contrôler la prolifération de la végétation aquatique flottante, en Côte d'Ivoire, une ouverture dans le cordon littoral a été pratiquée en septembre 1987 mettant ainsi en communication directe le fleuve Comoé avec l'océan. L'impact de cet aménagement sur l'hydrochimie (salinité, éléments nutritifs et biomasse chlorophyllienne)et le degré de contamination bactérienne a été étudié dans la zone proche du canal de Vridi. Avant la réouverture du grau de Bassam, les eaux du Comoé s'évacuaient dans l'océan par ce canal artificiel situé dans la ville d'Abidjan. L'étude comparative de deux cycles annuels en quatre stations avant (1985) et après (1987/88)l'ouverture du grau de Bassam (Analyses en Composantes Principales(ACP))est discutée en fonction des...
Tipo: Journal Contribution Palavras-chave: Microbial contamination; Estuarine circulation.
Ano: 1991 URL: http://hdl.handle.net/1834/5259
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L'ionisation des produits de la pêche ArchiMer
Kodo, Jean-louis.
Fishes and fishery products are seafoods which have a nutritive value with a high proteins rate. Fishery products ionization has four steps: the radappertization (sterilization of the seafood), the radicidation (destruction of the pathogen germs), the radurization (food conservation and microbial flora reduction), the desinsectization (insects and parasites elimination). Fishery products quality control is very important
Tipo: Text Palavras-chave: Legislation; Microbial contamination; Marine fish; Disinfection; Pathogens; Sterilization; Irradiation; Ionizing radiation; Fish inspection regulations; Quality control; Seafood; Processed fishery products; Bacteria.
Ano: 1990 URL: http://archimer.ifremer.fr/doc/1990/rapport-649.pdf
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Microbial contamination of central supply systems for medical air BJM
Andrade,Carolina Machado; Brown,Tamara.
There are many standards and recommendations for breathing air quality associated with respiratory protection equipment, but little has been done regarding the possible microbial contamination of medical air. The present study demonstrates quantitatively and qualitatively that pipelines might be incriminated as source of microbial contamination of compressed and synthetic air for medical use. Air samples were drawn into an especially pressure-resistant device and the bacterial and fungi contents were identified after growth on agar plates. The bacterial flora isolated from peripheral air outlets was virtually the same as that found in the central air-generating installations, consisting of a mixture of pathogens and normal skin bacteria. Several factors...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Microbial contamination; Compressed air; Synthetic air; Medical air.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822003000500010
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Microbiological monitoring mf mineral water commercialized in Brazil BJM
Pontara,André Venturini; Oliveira,Christianne Dezuani Dias de; Barbosa,Amir Horiquini; Santos,Rafael Aparecido dos; Pires,Regina Helena; Martins,Carlos Henrique Gomes.
The quality of mineral water commercialized in Brazil regarding the microbial content was analyzed and the results were compared with the standards established by the current legislation. Results demonstrated there was no bacterial contamination, but several types of fungi were found. Therefore, bottled mineral water could be considered a possible route for the transmission of filamentous fungi and yeasts.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Mineral water; Microbial contamination; Membrane filter technique; Fungi.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000200020
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