Role of MRA in the detection of intracranial aneurysm in the acute phase of subarachnoid hemorrhage

International audienceBackground: Magnetic resonance angiography (MRA) has been evaluated for the detection of unruptured intracranial aneurysms with favorable results at 3 Tesla (3 T) and with similar diagnostic accuracy as both 3D time-of-flight (3D-TOF) and contrast-enhanced (CE-MRA) MRA. However, the diagnostic value and place of MRA in the detection of ruptured aneurysms has been little evaluated. Thus, the goal of this prospective single-center series was to assess the feasibility and diagnostic value of 3 T 3D-TOF MRA and CE-MRA for aneurysm detection in acute non-traumatic subarachnoid hemorrhage (SAH).Methods: From March 2006 to December 2007, all consecutive patients admitted to our hospital with acute non-traumatic SAH (≤ 10 days) were prospectively included in this study evaluating MRA in the diagnostic workup of SAH. Feasibility of MRA and sensitivity/specificity of 3D-TOF and CE-MRA were assessed compared with gold standard DSA.Results: In all, 84 consecutive patients (45 women, 39 men; age 23–86 years) were included. The feasibility of MRA was low (43/84, 51.2%). The reasons given for patients not undergoing magnetic resonance imaging (MRI) examination were clinical status (27 patients), potential delay in aneurysm treatment (11 patients) and contraindications to MRI (three patients). In patients explored by MRA, the sensitivity of CE-MRA (95%) was higher compared with 3D-TOF (86%) with similar specificity (80%). Also, 3D-TOF missed five aneurysms while CE-MRA missed two.Conclusion: The value of MRA in the diagnostic workup of ruptured aneurysms is limited due to its low feasibility during the acute phase of bleeding. Sensitivity for aneurysm detection was good for both MRA techniques, but tended to be better with CE-MRA

Role of MRA in the detection of intracranial aneurysm in the acute phase of subarachnoid hemorrhage

International audienceBackground: Magnetic resonance angiography (MRA) has been evaluated for the detection of unruptured intracranial aneurysms with favorable results at 3 Tesla (3 T) and with similar diagnostic accuracy as both 3D time-of-flight (3D-TOF) and contrast-enhanced (CE-MRA) MRA. However, the diagnostic value and place of MRA in the detection of ruptured aneurysms has been little evaluated. Thus, the goal of this prospective single-center series was to assess the feasibility and diagnostic value of 3 T 3D-TOF MRA and CE-MRA for aneurysm detection in acute non-traumatic subarachnoid hemorrhage (SAH).Methods: From March 2006 to December 2007, all consecutive patients admitted to our hospital with acute non-traumatic SAH (≤ 10 days) were prospectively included in this study evaluating MRA in the diagnostic workup of SAH. Feasibility of MRA and sensitivity/specificity of 3D-TOF and CE-MRA were assessed compared with gold standard DSA.Results: In all, 84 consecutive patients (45 women, 39 men; age 23–86 years) were included. The feasibility of MRA was low (43/84, 51.2%). The reasons given for patients not undergoing magnetic resonance imaging (MRI) examination were clinical status (27 patients), potential delay in aneurysm treatment (11 patients) and contraindications to MRI (three patients). In patients explored by MRA, the sensitivity of CE-MRA (95%) was higher compared with 3D-TOF (86%) with similar specificity (80%). Also, 3D-TOF missed five aneurysms while CE-MRA missed two.Conclusion: The value of MRA in the diagnostic workup of ruptured aneurysms is limited due to its low feasibility during the acute phase of bleeding. Sensitivity for aneurysm detection was good for both MRA techniques, but tended to be better with CE-MRA

Efficacy of Commercial Phage Based Treatment as a Control Strategy against Listeria Spp. and Effect of Host Characteristics on Lytic Capacity

Listeria monocytogenes can persist on food contact (FCS) and non-food contact surfaces (NFCS) and enter the food continuum by cross-contamination. Meat processing facilities are a known source of Listeria spp. contamination. Specificity and safety of use render bacteriophages suitable to control Listeria spp. in foods and food environments. Previous research has shown that host characteristics can affect lytic efficacy of bacteriophages. This study focuses on evaluating how phenotypic and genotypic characteristics of Listeria hosts influence lytic capacity of a commercial listeriophage cocktail in vitro. We also investigated the efficacy of listeriophage as a biocontrol strategy for Listeria spp. on non-food contact surfaces (NFCS) in a meat processing facility. In vitro lytic capacity was tested quantitatively using spot assay for 475 Listeria spp. isolates with varied phenotypic (attachment capacity, sanitizer tolerance) and genotypic (PFGE) characteristics. Lytic capacity was measured quantitatively for 55 isolates by monitoring growth of L. monocytogenes cultures with and without listeriophage over time and enumerating bacterial counts after 4h. Fifty-nine NFCS were tested in a meat processing facility for Listeria spp. weekly for three weeks. Each Listeria spp. positive site was treated with commercial phage then assessed for reduction in Listeria spp. Although enhanced attachment capacity and sanitizer tolerance of Listeria spp. isolates did not significantly (p\u3e0.05) influence phage susceptibility in vitro; history of persistence, incubation temperature, and concentration of listeriophage treatment were critical. Quantitatively, listeriophage treatment significantly (p\u3c0.001) affected growth and reduced bacterial counts of Listeria spp. compared to control samples. A total of 15, 21, and 14 sites were positive for Listeria spp. at weeks one, two, and three, respectively. Post-treatment Listeria spp. were detected in 12/23 sites, and numerically reduced in 4/12 sites by an average of 2.1 log CFU/sponge. Among the isolates subjected to spot assay, 60% strains showed low susceptibility to listeriophage, 36% showed moderate lysis, and 4% isolates showed confluent lysis by listeriophage. This study illustrates influence of bacterial host characteristics on lytic efficacy of listeriophage treatment. Further, we have preliminary evidence for listeriophage as a potential control strategy in food environments

sj-docx-1-wso-10.1177_17474930231205213 – Supplemental material for Evaluation of mechanical thrombectomy in acute ischemic stroke related to a distal arterial occlusion: A randomized controlled trial

Supplemental material, sj-docx-1-wso-10.1177_17474930231205213 for Evaluation of mechanical thrombectomy in acute ischemic stroke related to a distal arterial occlusion: A randomized controlled trial by Frédéric Clarençon, Isabelle Durand-Zaleski, Kévin Premat, Amandine Baptiste, Emmanuel Chabert, Anna Ferrier, Marc-Antoine Labeyrie, Peggy Reiner, Laurent Spelle, Christian Denier, Titien Tuilier, Hassan Hosseini, Christine Rodriguez-Régent, Guillaume Turc, Cédric Fauché, Matthias Lamy, Bertrand Lapergue, Arturo Consoli, Charlotte Barbier, Marion Boulanger, Nicolas Bricout, Hilde Henon, Benjamin Gory, Sébastien Richard, Aymeric Rouchaud, Francisco Macian-Montoro, Omer Eker, Tae-Hee Cho, Sébastien Soize, Solène Moulin, Jean-Christophe Gentric, Serge Timsit, Jean Darcourt, Jean-François Albucher, Kévin Janot, Mariam Annan, Fernando Pico, Vincent Costalat, Caroline Arquizan, Gautier Marnat, Igor Sibon, Raoul Pop, Valérie Wolff, Eimad Shotar, Stéphanie Lenck, Nader-Antoine Sourour, Anne Radenne, Sonia Alamowitch and Agnès Dechartres in International Journal of Stroke</p

sj-docx-8-wso-10.1177_17474930231205213 – Supplemental material for Evaluation of mechanical thrombectomy in acute ischemic stroke related to a distal arterial occlusion: A randomized controlled trial

Supplemental material, sj-docx-8-wso-10.1177_17474930231205213 for Evaluation of mechanical thrombectomy in acute ischemic stroke related to a distal arterial occlusion: A randomized controlled trial by Frédéric Clarençon, Isabelle Durand-Zaleski, Kévin Premat, Amandine Baptiste, Emmanuel Chabert, Anna Ferrier, Marc-Antoine Labeyrie, Peggy Reiner, Laurent Spelle, Christian Denier, Titien Tuilier, Hassan Hosseini, Christine Rodriguez-Régent, Guillaume Turc, Cédric Fauché, Matthias Lamy, Bertrand Lapergue, Arturo Consoli, Charlotte Barbier, Marion Boulanger, Nicolas Bricout, Hilde Henon, Benjamin Gory, Sébastien Richard, Aymeric Rouchaud, Francisco Macian-Montoro, Omer Eker, Tae-Hee Cho, Sébastien Soize, Solène Moulin, Jean-Christophe Gentric, Serge Timsit, Jean Darcourt, Jean-François Albucher, Kévin Janot, Mariam Annan, Fernando Pico, Vincent Costalat, Caroline Arquizan, Gautier Marnat, Igor Sibon, Raoul Pop, Valérie Wolff, Eimad Shotar, Stéphanie Lenck, Nader-Antoine Sourour, Anne Radenne, Sonia Alamowitch and Agnès Dechartres in International Journal of Stroke</p

sj-docx-4-wso-10.1177_17474930231205213 – Supplemental material for Evaluation of mechanical thrombectomy in acute ischemic stroke related to a distal arterial occlusion: A randomized controlled trial

Supplemental material, sj-docx-4-wso-10.1177_17474930231205213 for Evaluation of mechanical thrombectomy in acute ischemic stroke related to a distal arterial occlusion: A randomized controlled trial by Frédéric Clarençon, Isabelle Durand-Zaleski, Kévin Premat, Amandine Baptiste, Emmanuel Chabert, Anna Ferrier, Marc-Antoine Labeyrie, Peggy Reiner, Laurent Spelle, Christian Denier, Titien Tuilier, Hassan Hosseini, Christine Rodriguez-Régent, Guillaume Turc, Cédric Fauché, Matthias Lamy, Bertrand Lapergue, Arturo Consoli, Charlotte Barbier, Marion Boulanger, Nicolas Bricout, Hilde Henon, Benjamin Gory, Sébastien Richard, Aymeric Rouchaud, Francisco Macian-Montoro, Omer Eker, Tae-Hee Cho, Sébastien Soize, Solène Moulin, Jean-Christophe Gentric, Serge Timsit, Jean Darcourt, Jean-François Albucher, Kévin Janot, Mariam Annan, Fernando Pico, Vincent Costalat, Caroline Arquizan, Gautier Marnat, Igor Sibon, Raoul Pop, Valérie Wolff, Eimad Shotar, Stéphanie Lenck, Nader-Antoine Sourour, Anne Radenne, Sonia Alamowitch and Agnès Dechartres in International Journal of Stroke</p

sj-tif-10-wso-10.1177_17474930231205213 – Supplemental material for Evaluation of mechanical thrombectomy in acute ischemic stroke related to a distal arterial occlusion: A randomized controlled trial

Supplemental material, sj-tif-10-wso-10.1177_17474930231205213 for Evaluation of mechanical thrombectomy in acute ischemic stroke related to a distal arterial occlusion: A randomized controlled trial by Frédéric Clarençon, Isabelle Durand-Zaleski, Kévin Premat, Amandine Baptiste, Emmanuel Chabert, Anna Ferrier, Marc-Antoine Labeyrie, Peggy Reiner, Laurent Spelle, Christian Denier, Titien Tuilier, Hassan Hosseini, Christine Rodriguez-Régent, Guillaume Turc, Cédric Fauché, Matthias Lamy, Bertrand Lapergue, Arturo Consoli, Charlotte Barbier, Marion Boulanger, Nicolas Bricout, Hilde Henon, Benjamin Gory, Sébastien Richard, Aymeric Rouchaud, Francisco Macian-Montoro, Omer Eker, Tae-Hee Cho, Sébastien Soize, Solène Moulin, Jean-Christophe Gentric, Serge Timsit, Jean Darcourt, Jean-François Albucher, Kévin Janot, Mariam Annan, Fernando Pico, Vincent Costalat, Caroline Arquizan, Gautier Marnat, Igor Sibon, Raoul Pop, Valérie Wolff, Eimad Shotar, Stéphanie Lenck, Nader-Antoine Sourour, Anne Radenne, Sonia Alamowitch and Agnès Dechartres in International Journal of Stroke</p

sj-docx-9-wso-10.1177_17474930231205213 – Supplemental material for Evaluation of mechanical thrombectomy in acute ischemic stroke related to a distal arterial occlusion: A randomized controlled trial

Supplemental material, sj-docx-9-wso-10.1177_17474930231205213 for Evaluation of mechanical thrombectomy in acute ischemic stroke related to a distal arterial occlusion: A randomized controlled trial by Frédéric Clarençon, Isabelle Durand-Zaleski, Kévin Premat, Amandine Baptiste, Emmanuel Chabert, Anna Ferrier, Marc-Antoine Labeyrie, Peggy Reiner, Laurent Spelle, Christian Denier, Titien Tuilier, Hassan Hosseini, Christine Rodriguez-Régent, Guillaume Turc, Cédric Fauché, Matthias Lamy, Bertrand Lapergue, Arturo Consoli, Charlotte Barbier, Marion Boulanger, Nicolas Bricout, Hilde Henon, Benjamin Gory, Sébastien Richard, Aymeric Rouchaud, Francisco Macian-Montoro, Omer Eker, Tae-Hee Cho, Sébastien Soize, Solène Moulin, Jean-Christophe Gentric, Serge Timsit, Jean Darcourt, Jean-François Albucher, Kévin Janot, Mariam Annan, Fernando Pico, Vincent Costalat, Caroline Arquizan, Gautier Marnat, Igor Sibon, Raoul Pop, Valérie Wolff, Eimad Shotar, Stéphanie Lenck, Nader-Antoine Sourour, Anne Radenne, Sonia Alamowitch and Agnès Dechartres in International Journal of Stroke</p