Eco-restoration of a mine technosol according to biochar particle size and dose application: study of soil physico-chemical properties and phytostabilization capacities of <Emphasis Type="Italic">Salix viminalis</Emphasis>     

Manhattan Lebrun  Florie Miard  Romain Nandillon  Gabriella S. Scippa  Sylvain Bourgerie  Domenico Morabito 《Journal of Soils and Sediments》2018,18(6):2188-2202

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Climate change impacts,adaptive capacity,and vulnerability of European forest ecosystems   总被引：3，自引：0，他引：3  

Marcus Lindner  Michael Maroschek  Sigrid Netherer  Antoine Kremer  Anna Barbati  Jordi Garcia-Gonzalo  Rupert Seidl  Sylvain Delzon  Piermaria Corona  Marja Kolström  Manfred J. Lexer  Marco Marchetti 《Forest Ecology and Management》2010

This study compiles and summarizes the existing knowledge about observed and projected impacts of climate change on forests in Europe. Forests will have to adapt not only to changes in mean climate variables but also to increased variability with greater risk of extreme weather events, such as prolonged drought, storms and floods. Sensitivity, potential impacts, adaptive capacity, and vulnerability to climate change are reviewed for European forests. The most important potential impacts of climate change on forest goods and services are summarized for the Boreal, Temperate Oceanic, Temperate Continental, Mediterranean, and mountainous regions. Especially in northern and western Europe the increasing atmospheric CO₂ content and warmer temperatures are expected to result in positive effects on forest growth and wood production, at least in the short–medium term. On the other hand, increasing drought and disturbance risks will cause adverse effects. These negative impacts are very likely to outweigh positive trends in southern and eastern Europe. From west to east, the drought risk increases. In the Mediterranean regions productivity is expected to decline due to strongly increased droughts and fire risks.  相似文献   

Characterization of Salmonella Typhimurium isolates associated with septicemia in swine     

Nadia Bergeron  Jonathan Corriveau  Ann Letellier  France Daigle  Sylvain Quessy 《Canadian journal of veterinary research》2010,74(1):11-17

Salmonella Typhimurium is frequently isolated from pigs and may also cause enteric disease in humans. In this study, 33 isolates of S. Typhimurium associated with septicemia in swine (CS) were compared to 33 isolates recovered from healthy animals at slaughter (WCS). The isolates were characterized using phenotyping and genotyping methods. For each isolate, the phage type, antimicrobial resistance, and pulsed-field gel electrophoresis (PFGE) DNA profiles were determined. In addition, the protein profiles of each isolate grown in different conditions were studied by Coomassie Blue-stained sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) and immunoblot. Various phage types were identified. The phage type PT 104 represented 36.4% of all isolates from septicemic pigs. Resistance to as many as 12 antimicrobial agents, including some natural resistances, was found in isolates from CS and WCS. Many genetic profiles were identified among the PT 104 phage types. Although it was not possible to associate one particular protein with septicemic isolates, several highly immunogenic proteins, present in all virulent isolates and in most isolates from clinically healthy animals, were identified. These results indicated that strains associated with septicemia belong to various genetic lineages that can also be recovered from asymptomatic animals at the time of slaughter.  相似文献   

Cloning and purification of the Streptococcus suis serotype 2 glyceraldehyde-3-phosphate dehydrogenase and its involvement as an adhesin   总被引：8，自引：0，他引：8  

Brassard J  Gottschalk M  Quessy S 《Veterinary microbiology》2004,102(1-2):87-94

Streptococcus suis serotype 2 is a swine pathogen responsible for diverse diseases and may be present in the tonsils of pigs which show no sign of illness. Because adhesion to host cells may be important in the carrier state, this study was undertaken to characterize a 39 kDa surface protein identified as a glyceraldehyde-3-phosphate dehydrogenase (GAPDH), possibly implicated in the adhesion of the bacteria. The gene encoding for the GAPDH of S. suis was cloned and sequenced. The DNA sequence contained an open reading frame encoding for a 336 amino acid polypeptide exhibiting 95% sequence identity with the GAPDH from Streptococcus pyogenes and from other streptococci. Using the Qiaexpress expression plasmids, the gapdh gene was inducibly overexpressed in E. coli to produce GAPDH with a hexahistidyl N-terminus to permit its purification. The (His)6GAPDH protein was found to possess functional GAPDH enzymatic activity after the purification. An adherence assay with S. suis and porcine tracheal rings pre-incubated with (His)6GAPDH and non-incubated rings was showed a significant reduction in the adhesion of S. suis in the (His)6GAPDH pre-incubated rings compared to the non-incubated rings. The GAPDH protein of S. suis seems to be involved in the first steps of the bacterial adhesion to host cells.  相似文献   

Abomasitis in calves: A retrospective cohort study of 23 cases (2006-2016)     

Eloi Guarnieri  Gilles Fecteau  Julie Berman  André Desrochers  Marie Babkine  Sylvain Nichols  David Francoz 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2020,34(2):1018-1027

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Laryngeal obstruction caused by lymphoma in an adult dairy cow     

Hélène Lardé  Sylvain Nichols  Marie Babkine  Sonia Chénier 《The Canadian veterinary journal. La revue veterinaire canadienne》2014,55(2):136-140

A Holstein cow was presented for inspiratory dyspnea. Endoscopic evaluation revealed swollen arytenoids and a presumptive diagnosis of bilateral arytenoidal chondritis was made. A partial arytenoidectomy was performed, the right arytenoid was submitted for histopathology, and a diagnosis of laryngeal lymphoma was made. Due to the poor prognosis, the cow was euthanized.  相似文献   

Immunogenicity and efficacy of fowlpox-vectored and inactivated avian influenza vaccines alone or in a prime-boost schedule in chickens with maternal antibodies     

Alexandra Richard-Mazet  Sylvain Goutebroze  Fran?ois-Xavier Le Gros  David E Swayne  Michel Bublot 《Veterinary research》2014,45(1)

Inactivated and fowlpox virus (FP)-vectored vaccines have been used to control H5 avian influenza (AI) in poultry. In H5 AI endemic countries, breeder flocks are vaccinated and therefore, maternally-derived antibodies (MDA) are transferred to their progeny. Results of three immunogenicity and one efficacy studies performed in birds with or without MDA indicated that the immunogenicity of an inactivated vaccine based on a H5N9 AI isolate (inH5N9) was severely impaired in chicks hatched from inH5N9-vaccinated breeders. This MDA interference was lower when breeders received only one administration of the same vaccine and could be overcome by priming the chicks at day-of-age with a live recombinant FP-vectored vaccine with H5 avian influenza gene insert (FP-AI). The interference of anti-FP MDA was of lower intensity than the interference of anti-AI MDA. The highest interference observed on the prime-boost immunogenicity was in chicks hatched from breeders vaccinated with the same prime-boost scheme. The level of protection against an antigenic variant H5N1 highly pathogenic AI isolate from Indonesia against which the FP-AI or inH5N9 alone was poorly protective could be circumvented by the prime-boost regimen in birds with either FP or AI MDA. Thus, the immunogenicity of vaccines in young chicks with MDA depends on the vaccination scheme and the type of vaccine used in their parent flocks. The heterologous prime-boost in birds with MDA may at least partially overcome MDA interference on inactivated vaccine.  相似文献