Consulta: subjectFacets:"Pathogenic bacteria"
Registros recuperados: 30
Data/hora: 05/06/2024 06:25:10

Ocorrência da mancha bacteriana do tomateiro no Submédio São Francisco.
Provedor de dados: 14
Autores: PEIXOTO, A. R.; TAVARES, S. C. C. de H.; KARASAWA, M.
Trata sobre lesoes em frutos de tomateiro, causadas por Xanthononas campestris pv. vesicatoria, teste de hipersensibilidade e de patogenicidade, identificacao do isolado bacteriano, crescimento de Xanthomonas campestris pv. vesicatoria em meio de cultura, caracteristicas culturais e bioquimicas dos diferentes isolados bacterianos obtidos de tomateiros, na regiao do Submedio Sao Francisco - Petrolina-PE, 1995.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Lycopersicum esculentum; Submédio São Francisco; Diseases; Pathogenic bacteria; Disease; Tomato.; Tomate; Doença; Mancha Bacteriana.; Xanthomonas; Tomatoes.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/132808

Merchant ships discharging unwanted marine species in close proximity of a French aquaculture area: Risks involved
Provedor de dados: 5
Autores: Masson, Daniel; Thomas, Gerard; Genauzeau, Sylvie; Le Moine, Olivier; Derrien, Annick.
The most important oyster farming area in Europe is in a close proximity of two medium size merchant ports. Cargo ships deballast in this area before loading, releasing unwanted or noxious marine species. During a sampling campaign aboard these arriving ships, we found in some ballast water samples a huge number of potentially toxic dinoflagellates and some potentially pathogenic bacteria. A model was applied to find the potential geographical spread of the discharged ballast water. This model predicts the water to reach highly vulnerable shellfish farmed areas in six to eight days.
Tipo: Text
Palavras-chave: Ballast water; Risk assessment; Toxin producing dinoflagellates; Shellfish farming; La Rochelle; Pathogenic bacteria.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00160/27130/25328.pdf

Bacteries ichtyopathogenes en mariculture
Provedor de dados: 5
Autores: Vigneulle, Martine.
Bacterial infections occurred during the development of marine fish farming of species such as turbot, sea-bass, sea-bream or salmon and trout. The main-specific bacteria involved in these diseases observed belong to 3 groups: the Vibrionaceae for Vibrio anguillarum (type 408) and Aeromonas salmonicida , the causative agents of respectively vibriosis and furinculosis; the Corynebacteriaceae for Renibacterium salmoninarum , responsible for bacterial kidney disease (BKD), the Enterobacteriaceae for Yersinia ruckeri , the causative agent of enteric redmouth disease. The clinical signs typical of those diseases always depend on the rearing and environmental conditions. The losses resulting from these bacterial diseases and the persistence of the bacteria in...
Tipo: Text
Palavras-chave: Yersinia ruckeri; Renibacterium salmoninarum; Aeromonas salmonicida; Vibrio anguillarum; Bacteria; Bacterial diseases; Fish culture; Pathogenic bacteria.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-996.pdf

Implantation et survie de Campylobacter jejuni/coli chez la moule Mytilus edulis
Provedor de dados: 5
Autores: 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

Ecologie des vibrions pathogenes
Provedor de dados: 5
Autores: Dodin, A; Dosso, M; Guillou, M.
There exists no biochemical test allowing to define the pathogenicity of a bacterium, still less for a Vibrionaceae. Two essential characters are to be retained to hold responsible an isolated germ, for an illness: 1) the binding factor, the identification is difficult but a double diffusion of agar should simplify the method; 2) the search for the choleric toxin or a common part of the choleric toxin (toxin LT or ST of E. coli ). Here again, simplified techniques may be used. The acquirement of a plasmid responsible for the binding factor or for the toxin production of the non-pathogenic Vibrionaceae in the origin of certain epidemic diseases in France and in the world. Frequently, epidemics due to common germs (Aeromonas hydrophila of Africa) lead to...
Tipo: Text
Palavras-chave: Aeromonas hydrophila; Vibrionaceae; Bacteria; Ecology; Microorganisms; Hosts; Bacterial diseases; Pathogenic bacteria.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-999.pdf

A white spot disease-like syndrome in the Pacific blue shrimp (Litopenaeus stylirostris) as a form of bacterial shell disease
Provedor de dados: 5
Autores: Goarant, Cyrille; Brizard, Raphael; Marteau, Anne-laure.
In May 1997, some white lesions evoking the white spot syndrome disease were observed in Litopenaeus stylirostris broodstock in New Caledonia. The occurrence of these lesions was neither associated with mortality, nor with histological evidence of white spot syndrome baculovirus (WSBV), The evidence suggests that these lesions result from a form of bacterial disease and are associated with an increased bacterial flora on the outer surface of the cuticle, as well as an increased incidence throughout the molt cycle. A microscopic observation of these lesions allows them to be differentiated from WSBV-associated lesions.
Tipo: Text
Palavras-chave: New Caledonia; White spot syndrome; Aquaculture; Pathogenic bacteria; Shrimp culture; Crustaceans; Diseases; Litopenaeus stylirostris.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/publication-373.pdf

Comparaison de methodes directes (microscopiques) et indirectes (par mise en culture) dans l'evaluation d'une pollution bacterienne d'origine fecale. Etude preliminaire
Provedor de dados: 5
Autores: 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

Isolation and characterization of a pathogenic bacterium specific to Manila clam Tapes philippinarum larvae
Provedor de dados: 5
Autores: Nicolas, Jean-louis; Ansquer, Dominique; Cochard, Jean-claude.
A bacterial strain belonging to the genus Vibrio was involved in a recurrent outbreak of disease in Manila clam Tapes philippinarum larvae at a commercial hatchery, This vibrio, named VTP for convenience, was not related to the known pathogenic vibrios and possessed unusual characteristics, Only Manila clam larvae and postlarvae were affected by the disease, Oyster and scallop larvae were not affected by vrp, Survival of vrp was found to be of short duration in seawater but even a very small number of cells (1 cell per 5 ml) could initiate the disease, VTP did not grow on thiosulfate-citratebile-sucrose agar and was resistant to chloramphenicol. An epidemiological study utilizing bioassays revealed the presence of VTP in adult bivalves and in the...
Tipo: Text
Palavras-chave: Bacterial diseases; Clam culture; Larvae; Pathogenic bacteria; Tapes philippinarum; Vibrio.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/00037/14872/12198.pdf

Fluorescent antibody enumeration of Vibrio cholerae in the marine environment.
Provedor de dados: 5
Autores: 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

The dispersal of nitrogen-fixing Enterobacteriaceae from sewage into the waters and sediments of Morecambe Bay, UK.
Provedor de dados: 5
Autores: Jones, K; Betaieb, M.
The sediments of Morecambe Bay contain large numbers of salinity-tolerant, nitrogen-fixing Enterobacteriaceae (NFEs) mainly Klebsiella pneumoniae ) which appear to be derived from sewage. Sewage effluents, regardless as to whether they have received primary or secondary treatment, contain huge numbers of NFEs with salinity-tolerant and freshwater strains present in roughly equal quantities. The bacteria are discharged into the rivers and estuaries and carried out to sea. Once in the sea the salinity-tolerant strains retain their viability better than the freshwater strains so that the incoming tide, which doses the sediments, contains mainly salinity-tolerant NFEs. It is probable that similar processes occur all round the U.K. coast, as inshore coastal...
Tipo: Text
Palavras-chave: Klebsiella pneumoniae; Enterobacteriaceae; Salinity tolerance; Microbial contamination; Pathogenic bacteria; Bacteria; Sewage; Nitrogen fixation; Sediment pollution; Sea water.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-1003.pdf

Etude experimentale de la disparition de coliformes fecaux d'un effluent urb ain en milieu marin
Provedor de dados: 5
Autores: 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

Présence du genre Listeria dans les coquillages issus de zones conchylicoles du Finistère
Provedor de dados: 5
Autores: Monfort, Patrick; Piclet, Guy; Le Naour, Gwenael; Le Saux, Jean-claude; Raguenes, Pierre; Boulben, Sylviane; Le Gal, Dominique; Minet, Jacques; Venien, Jacqueline; Cormier, Michel; Plusquellec, Alain.
Cette étude a porté sur la recherche des bactéries appartenant au genre Listeria (Listeria spp.) dans 61 échantillons de coquillages issus de quelques zones de production situées dans le département du Finistère. Ces investigations, effectuées au cours de deux périodes (janvier-février et juillet -août 1994), ont mis en évidence la présence régulière des Listeria dans les bivalves (L. spp.= 49.2% ), la part non négligeable de Listeria monocytogenes (L.m. = 11.5%), la multiplicité d'espèces sur quelques échantillons testés (Baie de Morlaix) ainsi qu'une large distribution de ce genre bactérien. Par ailleurs, il est démontré une incidence saisonnière,la période hivernale se révélant la plus critique. Cette information, intéressante sur le plan sanitaire,...
Tipo: Text
Palavras-chave: Listeria; Bactéries pathogènes; Coquillages; Produits marins; Estuaires; Listeria; Pathogenic bacteria; Shellfishes; Seafood products; Estuaries.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/00104/21555/19134.pdf

The effect of anaerobic digestion in biogas plants on survival of pathogenic bacteria
Provedor de dados: 19
Autores: Umetsu, K; Kikuchi, S; Nishida, T; Kida, K; Ihara, I; Yamashiro, T; 梅津, 一孝; 西田, 武弘; 木田, 克弥.
The paper deals with the hygienic advantages of sanitation to treat dairy manure in full-scale biogas plants. Slurry samples were collected from two thermophilic biogas plants (55ºC) and two mesophilic biogas plants (38ºC) in Hokkaido, Japan. The detectable number of Coli-aerogenes group and Enterococcus in the slurries after anaerobic digestion could not be found in both thermophilic biogas plants. In both mesophilic biogas plants, however, the viable numbers of Coli-aerogenes group and Enterococcus were detected in the slurries even after anaerobic digestion. The mean decimation reduction time (T90) values of Coli-aerogenes group and Enterococcus in the slurries during mesophilic digestion were 13.3 d and 16.7 d, respectively.
Palavras-chave: Biogas plant; Pathogenic bacteria; Coli-aerogenes group; Enterococcus.
Ano: 2009
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2732

Les Escherichia coli enterrohemorragiques (EHEC) O157: H7: un problème de santé publique.
Provedor de dados: 20
Autores: Adingra, A.A.; Kouadio, A.N.; Kouassi, A.M.
Même si les infections graves dues à E. coli O157: H7 sont rares, elles restent globalement une menace pour l'homme. D'où l'importance des recherches pour mieux comprendre les mécanismes moléculaires en cause dans l'émergence de nouvelles souches bactériennes très virulentes chez l'homme. Il est aussi indispensable de respecter les mesures d'hygiène pour minimiser voire éviter la contamination par E. coli.
Tipo: Journal Contribution
Palavras-chave: Bacterial diseases; Pathogenic bacteria.
Ano: 2011
URL: http://hdl.handle.net/1834/5806

Nutritive and antimicrobial profiles of some seagrasses from bardawil lake, egypt
Provedor de dados: 20
Autores: Daboor, S.M.; Abd El-Hady, H.H.; Ghoniemy, A.E.
Seagrasses species in Bardawil Lake have been defined through broad quantitative sampling. From the biochemical constituent's point of view, two species namely; Cymodocea nodosa and Ruppia cirrhosa were evaluated as feed additives and antimicrobial active compounds. The obtained results showed an obvious increase in chlorophyll "a", carbohydrate and lipid contents in the C. nodosa than R. cirrhosa while protein contents was higher in R. cirrhosa than in C. nodosa. Whole plant tissues powder substance (10.0%w/v) and ethanolic extracts (200μg/ml) of C. nodosa and R. cirrhosa were evaluated against some microorganisms using pour plate technique. Powdered substance of C. nodosa was exhibited the highest antifungal activity than that of R. cirrhosa, also its...
Tipo: Journal Contribution
Palavras-chave: Field Study; Pathogenic bacteria; Seagrass; Pathogenic bacteria; Http://aims.fao.org/aos/agrovoc/c_34317.
Ano: 2007
URL: http://hdl.handle.net/1834/2202

Seasonal variation of antibacterial activity of the brown alga padina pavonica (l) thivy collected from northern coast of tunisia
Provedor de dados: 20
Autores: Ben Ali, A. I.; Ktari, L.; Boudabbous, A.; El Bour, M.
L’algue brune Padina pavonica a été récoltée durant une période d’une année (Juillet 2006 à Juin 2007), dans la côte nord de la Tunisie (Cap Zebib) en vue d'évaluer l'activité antibactérienne d’extraits bruts de l’algue et leur variabilité saisonnière. Les extraits d’algue ont été préparés en utilisant le  Dichlorométhane et le Dichlorométhane/Méthanol et testés périodiquement (tous les mois) sur une gamme de bactéries pathogènes et des bactéries associées isolées de l’algue. Une variation significative de l'activité antibactérienne liée au solvant d’extraction utilisé a été notée. Ainsi, les extraits au Dichloromethane/Méthanol sont plus actifs. Aussi nous avons noté la présence d’une variabilité saisonnière de l'activité antibactérienne. Ce sont les...
Tipo: Journal Contribution
Palavras-chave: Bacteria; Pathogenic bacteria; Seasonal variations; Antibacterials; Algae.
Ano: 2010
URL: http://hdl.handle.net/1834/4699

evaluation of the microbial quality of the river nile waters at damietta branch, egypt
Provedor de dados: 20
Autores: Sabae, S.Z.; Rabeh, S.A.
This study aims to the evaluation of the microbial quality of the River Nile water at Damietta Branch. Water samples were taken from the branch, during the period from autumn, 2005 till the summer of 2006. Some environmental parameters such as temperature, transparency, depth and pH were monitored. In addition, the bacteriological analyses involved total viable bacterial counts (TVBCs), total coliforms (TC) and estimation of faecal coliforms (FC), faecal streptococci and pathogenic bacteria. The results of physicochemical parameters showed that the temperature values varied from 17°C to 25°C and the transparency from 40cm to 220cm. Whereas, the depths varied from 3m to 25m and pH values from 7.24 to 8.44. The bacteriological analyses showed that TVBCs...
Tipo: Journal Contribution
Palavras-chave: Field Study; Pollution; Pathogenic bacteria; Pollution; Pathogenic bacteria; Http://aims.fao.org/aos/agrovoc/c_6077; Http://aims.fao.org/aos/agrovoc/c_34317.
Ano: 2007
URL: http://hdl.handle.net/1834/1899

Antimicrobial activity of a marine isolate of Pseudomonas cepacia k2 from ruditapes decussatus
Provedor de dados: 20
Autores: Chahad Bourouni, O.; Ktari, L.; Boudabbous, A.; El Bour, M.
Une souche de Pseudomonas cepacia, designée K2, isolée à partir de la palourde Ruditapes decussatus a montré une activité antibactérienne significative contre un certain nombre de bactéries marines, y compris Aeromonas hydrophila, Aeromonas salmonicida et Vibrio anguillarum qui sont les bactéries pathogènes les plus fréquemment signalées dans l'environnement marin, responsables d’une forte mortalité des poissons et des crustacés. Cette souche K2 a montré une capacité d’inhibition très rapide dès le début de sa croissance (après 8h d'incubation). L'intensité de son activité est très importante et a tendance à augmenter avec le temps d'incubation. Les études préliminaires sur la nature de l'inhibition a indiqué qu'au moins l'une des substances...
Tipo: Journal Contribution
Palavras-chave: Infectious diseases; Pathogenic bacteria; Antibacterials; Aquaculture.
Ano: 2010
URL: http://hdl.handle.net/1834/4694

Méthodes rapides de détection de Vibrio cholerae O1 dans l'environnement aquatique
Provedor de dados: 20
Autores: Adingra, A.A.; Kouassi, A.M.; Lowenhaupt, E.
La microscopie directe par immunofluorescence et le SMART test permettent une détection plus spécifique et sensible pour les pathogènes de l'homme dans les échantillons naturels. Les bactéries cultivables et non cultivables peuvent être observées et énumérées rapidement et facilement.
Tipo: Journal Contribution
Palavras-chave: Aquatic environment; Environmental diseases; Pathogenic bacteria.
Ano: 2010
URL: http://hdl.handle.net/1834/5766

Estudios químicos y bacteriológicos del río Baradero (Argentina): calidad sanitaria del agua y aptitud de los peces para consumo humano
Provedor de dados: 20
Autores: Costagliola, M.; Seigneur, G.N.; Jurquiza, V.
As a result of an agreement signed by the Municipal Government of Baradero Buenos Aires Province, Argentina and the INIDEP, the sanitary quality of the Baradero River waters was studied and fish safety assessed. Results of five field surveys carried out between 1993 and 1997 are studied. Organochlorine and organophosphorate pesticide residues, as well as traces of heavy metals were analyzed in 49 fish specimens and aerobic heterotrophic bacteria (AHB), total coliform bacteria (TC) and fecal coliform bacteria (FC) were counted out in 7 sampling stations placed on the coast and the riverbed. Alpha Hexachlorohexane, gamma Hexachlorohexane, beta Hexachlorohexane, Aldrin, Heptachlor epoxide, pp'DDE and Dieldrin were detected in fish tissues. The values of AHB...
Tipo: Journal Contribution
Palavras-chave: Freshwater pollution; Pollution surveys; Chemical analysis; Water analysis; Microbiological analysis; Pesticides; Public health; Pathogenic bacteria; Pesticides; Public health; Water analysis; Microbiological analysis; Pathogenic bacteria; Http://aims.fao.org/aos/agrovoc/c_5739; Http://aims.fao.org/aos/agrovoc/c_6349; Http://aims.fao.org/aos/agrovoc/c_16064; Http://aims.fao.org/aos/agrovoc/c_25302; Http://aims.fao.org/aos/agrovoc/c_34317.
Ano: 2003
URL: http://hdl.handle.net/1834/2417

Extended serotyping scheme for &lt;i&gt;Vibrio anguillarum&lt;/i&gt; with the definition and characterization of seven provisional O-serogroups
Provedor de dados: 27
Autores: Pedersen, K.; Grisez, L.; van Houdt, R.; Tiainen, T.; Ollevier, F.P.; Larsen, J.L.
The present paper summarizes the serotyping scheme of the fish pathogenic bacterium &lt;i&gt;Vibrio anguillarum&lt;/i&gt; and defines seven additional O-serogroups. Strains, collected in our laboratories that were nontypable with antisera against the previously defined 16 O-serotypes, were used for generating new antisera and were characterized further by means of LPS profiles, Western blots, and serological reactions. On the basis of the results, it is suggested that the seven new O-serogroups are to be included in the existing serotyping system as serotypes O17-O&lt;sub&gt;2&lt;/sub&gt;3. However, the existence of further &lt;i&gt;V. anguillarum&lt;/i&gt; strains that were not typable with any of the 23 O-antisera suggested the existence of additional...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bacterial diseases; Fish diseases; Pathogenic bacteria; Pathogens; Serological studies; Serotypes; Strains; Vibrio anguillarum.
Ano: 1999
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=9525

An oral challenge for turbot larvae with &lt;i&gt;Vibrio anguillarum&lt;/i&gt;
Provedor de dados: 27
Autores: Chair, M.; Dehasque, M.; Van Poucke, S.; Nelis, H.; Sorgeloos, P.; De Leenheer, A.P.
There is a need for a standard in vitro procedure to infect larval fish with bacteria. Such a procedure could be used as a tool to evaluate fish quality, verify fish sensitivity to a certain bacterial strain or evaluate the pathogenicity of a bacterium towards a given fish species. The availability of a challenge test is a prerequisite in studies dealing with the effect of different medicinal treatments on diseased fish. An oral challenge test would offer the possibility to investigate the routes of infection via the digestive tract, i.e. after feeding contaminated feeds. The present study aims to verify this hypothesis and proposes a standard challenge procedure for turbot (&lt;i&gt;Scophthalmus maximus&lt;/i&gt;) larvae with a pathogenic &lt;i&gt;Vibrio...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bacterial diseases; Digestive system; Disease control; Fish culture; Fish diseases; Fish larvae; Marine fish; Pathogenic bacteria; Vibrio anguillarum.
Ano: 1994
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2552

Selected bacterial strains protect &lt;i&gt;Artemia&lt;/i&gt; spp. from the pathogenic effects of &lt;i&gt;Vibrio proteolyticus&lt;/i&gt; CW8T2
Provedor de dados: 27
Autores: Verschuere, L.; Heang, H.; Criel, G.R.J.; Sorgeloos, P.; Verstraete, W.
In this study &lt;i&gt;Vibrio proteolyticus&lt;/i&gt; CW8T2 has been identified as a virulent pathogen for &lt;i&gt;Artemia&lt;/i&gt; spp. Its infection route has been visualized with transmission electron microscopy. The pathogen affected microvilli and gut epithelial cells, disrupted epithelial cell junctions, and reached the body cavity, where it devastated cells and tissues. In vivo antagonism tests showed that pre-emptive colonization of the culture water with nine selected bacterial strains protected &lt;i&gt;Artemia&lt;/i&gt; juveniles against the pathogenic effects. Two categories of the selected strains could be distinguished: (i) strains providing total protection, as no mortality occurred 2 days after the experimental infection with &lt;i&gt;V....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquatic animals; Bacteria; Biological control; Brine shrimp culture; Disease control; Infectious diseases; Microbiological analysis; Pathogenic bacteria; Artemia; Vibrio proteolyticus.
Ano: 2000
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=45

Antibacterial activity of essential oils on Xanthomonas vesicatoria and control of bacterial spot in tomato
Provedor de dados: 86
Autores: Lucas,Gilvaine Ciavareli; Alves,Eduardo; Pereira,Ricardo Borges; Perina,Fabiano José; Souza,Ricardo Magela de.
The objective of this work was to evaluate the effects of plant essential oils (EOs) on the growth of Xanthomonas vesicatoria, on bacterial morphology and ultrastructure, and on the severity of tomato bacterial spot. EOs from citronella, clove, cinnamon, lemongrass, eucalyptus, thyme, and tea tree were evaluated in vitro at concentrations of 0.1, 1.0, 10, and 100% in 1.0% powdered milk. The effect of EOs, at 0.1%, on the severity of tomato bacterial spot was evaluated in tomato seedlings under greenhouse conditions. The effects of citronella, lemongrass, clove, and tea tree EOs, at 0.1%, on X. vesicatoria cells were evaluated by transmission electron microscopy. All EOs showed direct toxic effect on the bacteria at a 10%-concentration in vitro. Under...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Alternative control of plant disease; Cell ultrastructure; Pathogenic bacteria.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000300006

Gamma irradiation in the control of pathogenic bacteria in refrigerated ground chicken meat
Provedor de dados: 63
Autores: Spoto,Marta Helena Filet; Gallo,Cláudio Rosa; Alcarde,André Ricardo; Gurgel,Maria Sílvia do Amaral; Blumer,Lucimara; Walder,Júlio Marcos Melges; Domarco,Rachel Elisabeth.
This work evaluated the effect of gamma radiation on reducting the population of Staphylococcus aureus, Escherichia coli and Salmonella typhimurium in ground chicken breast stored under refrigeration. The experiment included a control and 4 doses of gamma radiation (2.0, 4.0, 6.0 and 8.0 kGy) along with 5 periods of storage under refrigeration (1, 7, 14, 21 and 28 days). Samples of ground chicken breast were inoculated with Staphylococcus aureus (ATCC 14458), Escherichia coli (ATCC 11105) and Salmonella typhimurium (ATCC 0626), irradiated at temperatures between 4 and 8°C and stored under refrigeration (5°C) for 28 days. The increased radiation dose and period of storage under refrigeration caused a reduction of Staphylococcus aureus, Escherichia coli and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gamma irradiation; Pathogenic bacteria; Chicken meat; Refrigeration.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162000000300003

Methods for thermal inactivation of pathogens in mozzarella: a comparison between stretching and pasteurization
Provedor de dados: 45
Autores: Raimundo,D.C.; Travaglini,R.G.; Souza,G.O.; Starikoff,K.R.; Sanches,S.A.; Souza,O.B.; Balian,S.C.; Telles,E.O.
This study aimed to evaluate the efficiency of stretching in the reduction of pathogens when compared to milk pasteurization, the official method to ensure safe cheese production. Whole buffalo milk was contaminated with Mycobacterium fortuitum, Listeria monocytogenes, Salmonella typhimurium, and Staphylococcus aureus. Part of the milk was used in mozzarella production and the other part was submitted to holder pasteurization. Pathogens were quantified before and after thermal processing (mozzarella stretching and milk pasteurization). Pasteurization and stretching led to the following reductions in log cycles, respectively: 4.0 and 6.3 for Mycobacterium sp.; 6.0 and 8.4 for Listeria sp.; &gt;6.8 and 4.5 for Staphylococcus sp.; and &gt;8.2 and 7.5 for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mozzarella; Stretching; Pasteurization; Pathogenic bacteria.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352013000200039

Activities of different types of Thai honey on pathogenic bacteria causing skin diseases, tyrosinase enzyme and generating free radicals
Provedor de dados: 48
Autores: Jantakee,Kanyaluck; Tragoolpua,Yingmanee.
BACKGROUND: Honey is a natural product obtained from the nectar that is collected from flowers by bees. It has several properties, including those of being food and supplementary diet, and it can be used in cosmetic products. Honey imparts pharmaceutical properties since it has antibacterial and antioxidant activities. The antibacterial and antioxidant activities of Thai honey were investigated in this study. RESULTS: The honey from longan flower (source No. 1) gave the highest activity on MRSA when compared to the other types of honey, with a minimum inhibitory concentration of 12.5% (v/v) and minimum bactericidal concentration of 25% (v/v). Moreover, it was found that MRSA isolate 49 and S. aureus were completely inhibited by the 50% (v/v) longan honey...
Tipo: Journal article
Palavras-chave: Anti-bacterial activity; Pathogenic bacteria; Anti-free radicals; Anti-tyrosinase.
Ano: 2015
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602015000100004

A comparative evaluation of antibacterial potential of some plants used in indian traditional medicine for the treatment of microbial infections
Provedor de dados: 52
Autores: Chattopadhyay,Rabi Ranjan; Bhattacharyya,Subir Kumar; Medda,Chiranjib; Chanda,Sunanda; Bag,Anwesa.
A comparative in vitro antibacterial potential of extracts (aqueous and ethanol) of five important medicinal plants (Aegle marmelos, Azadirachta indica, Terminalia chebula, Mangifera indica and Ocimum sanctum) were investigated using microbial growth inhibition assays against the common human pathogenic bacteria (Staphylococcus aureus, Pseudomonas aeruginosa and Escherichia coli) of clinical origin. All the plant materials showed varying degrees of strain specific inhibitory action and ethanol extract of the plant materials showed higher antibacterial activity than their aqueous counterparts. Besides, T. chebula and A. marmelos had the strongest antibacterial activity out of which, T. chebula possessed a wider spectrum and a superior antibacterial...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pathogenic bacteria; Medicinal plants; Antibacterial potential; Comparative study.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000500009

Pathogenic and opportunistic respiratory bacteria-induced apoptosis
Provedor de dados: 55
Autores: Lancellotti,Marcelo; Pereira,Rafaella Fabiana Carneiro; Cury,Gisele Gentile; Hollanda,Luciana Maria de.
Several pathogenic or opportunistic bacteria have the ability to either induce or inhibit host cell apoptosis. The capacity to modulate cell pathways that result in the induction or delay of host cell apoptosis is considered to be an important bacterial virulence mechanism. These processes could be mediated by different host cell signaling pathways that are subverted by the bacteria. Pathogens are able to activate apoptotic proteins, such as caspases, or inactivate anti-apoptotic proteins, such as NFkB and the MAPKKs, or even up-regulate the endogenous receptor/ligand system that induces apoptosis, generally when the bacteria are bound to the host cell surface. The bacteria-induced apoptotic or anti-apoptotic processes are often related with the fact that...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pathogenic bacteria; Opportunistic bacteria; Apoptosis; Bacteria induce apoptosis; Respiratory bacteria.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702009000300014

Microbiological quality of salmon (Salmo salar) sold in cities of the state of São Paulo, Brazil
Provedor de dados: 58
Autores: Nespolo,Natália Maramarque; Martineli,Thaís Mioto; Rossi Jr.,Oswaldo Durival.
The present paper evaluated the microbiology of salmon by quantifying mesophilic heterotrophic microorganisms, total and thermotolerant coliforms, and the presence of Vibrio parahaemolyticus, Staphylococcus aureus, Salmonella sp., Escherichia coli and Aeromonas sp. in the meat. This study can provide technical support for the suggestion of a new regulation of a Brazilian legislation through specific microbiological standards concerning the consumption of raw fish. A number of 31 (16 cooled and 15 frozen) samples of salmon were collected in the retail market network of a few cities in the State of São Paulo, Brazil. Results presented populations of mesophilic heterotrophic microorganisms ranging from 1.0 x 10 and 3.9 x 10(6) CFU/g, total and thermotolerant...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fish; Salmon; Microbiology; Pathogenic bacteria.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000400021