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Bagel A, Delignette-Muller ML, Lopez C, Michel V, Sergentet D, Douellou T. Strain- and serotype-dependent affinity of Shiga toxin-producing Escherichia coli for bovine milk fat globules. J Dairy Sci 2022; 105:8688-8704. [PMID: 36175225 DOI: 10.3168/jds.2022-21840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 07/01/2022] [Indexed: 11/19/2022]
Abstract
Shiga toxin-producing Escherichia coli (STEC) are widely detected in raw milk products intended for human consumption. Although STEC are a worldwide public health problem, the pathogenicity of STEC in cheese remains unclear. In fact, bacterial association with compounds in raw milk cheeses could reduce their pathogenicity. A previous study showed the association of 2 STEC strains with raw milk cream in a natural creaming assay. Different concentrations of each strain were required to saturate the cream. In this study, we hypothesized that all STEC strains could be associated with milk fat globules (MFG) in raw milk and that the bacterial load required for saturation of the cream is serotype dependent. We evaluated the affinity of STEC strains belonging to the O157:H7, O26:H11, and O103:H2 serotypes for bovine raw milk cream and analyzed saturation of the cream layer by natural creaming assay. We used 12 STEC strains and 3 strains belonging to another pathotype to assess the effects of serotypes on this phenomenon. We performed sucrose density gradient centrifugation assays with 2 STEC model strains to confirm the results obtained by natural creaming. The localization of STEC within MFG-enriched creams was observed by confocal and electron microscopy. We recovered approximately 10 times more STEC from the cream layer after natural creaming than from raw bovine milk. The concentration of STEC required to saturate the cream layer (the saturation concentration) was estimated for each strain by nonlinear regression, highlighting a strain and serotype effect. Moreover, the concentration of STEC in the cream was milk fat level dependent. However, even in nonsaturating conditions, a high level of STEC was still present in the aqueous phase, after fat separation. Thus, natural creaming should not be used as the sole preventive measure to remove STEC from naturally contaminated raw milk. The results of our study suggest that cream saturation is a complex mechanism, most likely involving specific interactions between STEC and raw MFG.
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Affiliation(s)
- A Bagel
- Bacterial Opportunistic Pathogens and Environment Research Group, Université de Lyon, UMR 5557 Ecologie Microbienne Lyon, National Center of Scientific Research, VetAgro Sup, 69280 Marcy-l'Etoile, France
| | - M-L Delignette-Muller
- Laboratoire de Biométrie et Biologie Evolutive, UMR 5558, Université de Lyon, VetAgro Sup, National Center of Scientific Research, 69622 Villeurbanne, France
| | - C Lopez
- INRAE, UR BIA, F-44316, Nantes, France
| | - V Michel
- Actalia, 74800 La Roche-sur-Foron, France
| | - D Sergentet
- Bacterial Opportunistic Pathogens and Environment Research Group, Université de Lyon, UMR 5557 Ecologie Microbienne Lyon, National Center of Scientific Research, VetAgro Sup, 69280 Marcy-l'Etoile, France; VetAgro Sup-Campus Vétérinaire, Laboratoire d'Etudes des Microorganismes Alimentaires Pathogènes-French National Reference Laboratory for Escherichia coli including Shiga toxin-producing E. coli (NRL-STEC), Université de Lyon, 69280, Marcy-l'Etoile, France.
| | - T Douellou
- Bacterial Opportunistic Pathogens and Environment Research Group, Université de Lyon, UMR 5557 Ecologie Microbienne Lyon, National Center of Scientific Research, VetAgro Sup, 69280 Marcy-l'Etoile, France
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2
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Thomas B, Aupy J, Penchet G, De Montaudouin M, Bartolomei F, Biraben A, Catenoix H, Chassoux F, Dupont S, Valton L, Michel V, Marchal C. Predictive factors of postoperative outcome in the elderly after resective epilepsy surgery. Rev Neurol (Paris) 2021; 178:609-615. [PMID: 34801264 DOI: 10.1016/j.neurol.2021.08.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2021] [Revised: 07/25/2021] [Accepted: 08/31/2021] [Indexed: 10/19/2022]
Abstract
OBJECTIVE To evaluate the efficiency of resective epilepsy surgery (RES) in patients over 50 years and determine prognostic factors. RESULTS Over the 147 patients over 50 years (54.9±3.8 years [50-69]) coming from 8 specialized French centres for epilepsy surgery, 72.1%, patients were seizure-free and 91.2% had a good outcome 12 months after RES. Seizure freedom was not associated with the age at surgery or duration of epilepsy. In multivariate analysis, seizure freedom was associated with MRI and neuropathological hippocampal sclerosis (HS) (P=0.009 and P=0.028 respectively), PET hypometabolism (P=0.013), temporal epilepsy (P=0.01). On the contrary, the need for intracranial exploration was associated with a poorer prognosis (P=0.001). Postoperative number of antiepileptic drugs was significantly lower in the seizure-free group (P=0.001). Neurological adverse event rate after surgery was 21.1% and 11.7% of patients had neuropsychological adverse effects overall transient. CONCLUSIONS RES is effective procedure in the elderly. Even safe it remains at higher risk of complication and population should be carefully selected. Nevertheless, age should not be considered as a limiting factor, especially when good prognostic factors are identified.
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Affiliation(s)
- B Thomas
- Department of Clinical Neurosciences, Bordeaux University Hospital, Bordeaux, France
| | - J Aupy
- Department of Clinical Neurosciences, Bordeaux University Hospital, Bordeaux, France; IMN, UMR CNRS 5293, University of Bordeaux, Bordeaux Neurocampus, Bordeaux, France.
| | - G Penchet
- Department of Neurosurgery, Bordeaux University Hospital, Bordeaux, France
| | - M De Montaudouin
- Department of Clinical Neurosciences, Bordeaux University Hospital, Bordeaux, France
| | - F Bartolomei
- Clinical Neurophysiology and Epileptology Department, APHM, Timone Hospital, Marseille, France; INS, Institut de Neurosciences des Systèmes, Aix-Marseille University, Marseille, France
| | - A Biraben
- Department of Neurology, University Hospital of Rennes, Rennes, France
| | - H Catenoix
- Department of Functional Neurology and Epileptology, Hospices Civils de Lyon, Lyon, France
| | - F Chassoux
- Department of Neurosurgery, Sainte-Anne Hospital Centre, Paris, France
| | - S Dupont
- Epilepsy Unit, La Pitié-Salpêtrière University Hospital, AP-HP, Paris, France
| | - L Valton
- Department of Neurology, Toulouse University Hospital, Toulouse, France
| | - V Michel
- Department of Clinical Neurosciences, Bordeaux University Hospital, Bordeaux, France
| | - C Marchal
- Department of Clinical Neurosciences, Bordeaux University Hospital, Bordeaux, France
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3
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Cisneros-Tamayo M, Kempf I, Coton J, Michel V, Bougeard S, de Boisséson C, Lucas P, Bäyon-Auboyer MH, Chiron G, Mindus C, Gautier-Bouchardon AV. Investigation on eggshell apex abnormality (EAA) syndrome in France: isolation of Mycoplasma synoviae is frequently associated with Mycoplasma pullorum. BMC Vet Res 2020; 16:271. [PMID: 32758240 PMCID: PMC7404918 DOI: 10.1186/s12917-020-02487-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Accepted: 07/22/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Mycoplasma synoviae (MS) is known to cause Eggshell Apex Abnormality (EAA) syndrome characterized by an altered shell surface with increased translucency on the apex. However, no large-scale studies have been conducted to obtain prevalence data of EAA and MS isolates associated to this syndrome. This manuscript reports the results of two field studies performed in the French poultry industry (2015-2017): focusing mainly on investigation of presence and prevalence of EAA in different types of laying hen flocks (phase 1), and isolation of MS strains from EAA-infected flocks (phase 2). RESULTS The first survey included 77 farms of commercial layers in three French egg-production regions, hosting 40 flocks in alternative systems (ALT) and 56 in furnished cages (FC). Seven flocks (4 FC and 3 ALT) presented EAA clinical signs, giving a prevalence of 7.3% in this studied sample. A second independent field study was conducted to identify MS by in vitro cultivation and PCR in samples from 28 flocks with clinical signs of EAA. Different types of biological specimens were collected in EAA-affected flocks and submitted to the laboratory. M. synoviae was detected in 25/28 flocks, from both production systems (5/5 ALT and 20/23 FC). Detection of MS was significantly higher in tracheal swabs (59%) than in cloacal (10.5%), albumen (3.6%) and egg yolk (1.1%) swabs. It is worth to mention that attempts to clone MS from positive samples were often hampered by the presence of another Mycoplasma species, which showed fast growing behaviour in the selective media used in this study (Frey Medium 4 and Frey Medium 4 supplemented with erythromycin). The use of MALDI-TOF mass spectrometry in combination with next-generation sequencing (NGS) results allowed the identification of this fast growing mycoplasma as Mycoplasma pullorum, which was detected in 14 of the 25 (56%) MS-positive flocks. CONCLUSIONS These results confirmed the presence of the EAA syndrome in MS-positive flocks of layers in France, reared in different regions and in different production systems (ALT and FC). Studies need to be conducted to test whether M. pullorum may influence the expression of clinical signs of EAA in MS-infected layer farms.
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Affiliation(s)
- M Cisneros-Tamayo
- Mycoplasmology, Bacteriology and Antimicrobial Resistance Unit, Ploufragan-Plouzané-Niort Laboratory, French Agency for Food, Environmental and Occupational Health and Safety (ANSES), Ploufragan, France.,Facultad de Medicina Veterinaria y Zootecnia, Universidad Central del Ecuador, Quito, Ecuador
| | - I Kempf
- Mycoplasmology, Bacteriology and Antimicrobial Resistance Unit, Ploufragan-Plouzané-Niort Laboratory, French Agency for Food, Environmental and Occupational Health and Safety (ANSES), Ploufragan, France
| | - J Coton
- Epidemiology and Welfare in Poultry and Rabbits, Ploufragan-Plouzané-Niort Laboratory, ANSES, Ploufragan, France
| | - V Michel
- Animal Welfare National Coordination, ANSES, Niort, France
| | - S Bougeard
- Epidemiology and Welfare in Pigs, Ploufragan-Plouzané-Niort Laboratory, ANSES, Ploufragan, France
| | - C de Boisséson
- Viral Genetics and Biosafety unit, Ploufragan-Plouzané-Niort Laboratory, ANSES, Ploufragan, France
| | - P Lucas
- Viral Genetics and Biosafety unit, Ploufragan-Plouzané-Niort Laboratory, ANSES, Ploufragan, France
| | | | | | | | - A V Gautier-Bouchardon
- Mycoplasmology, Bacteriology and Antimicrobial Resistance Unit, Ploufragan-Plouzané-Niort Laboratory, French Agency for Food, Environmental and Occupational Health and Safety (ANSES), Ploufragan, France.
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Fay R, Schaub M, Banik MV, Border JA, Henderson IG, Fahl G, Feulner J, Horch P, Korner F, Müller M, Michel V, Rebstock H, Shitikov D, Tome D, Vögeli M, Grüebler MU. Whinchat survival estimates across Europe: can excessive adult mortality explain population declines? Anim Conserv 2020. [DOI: 10.1111/acv.12594] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- R. Fay
- Swiss Ornithological Institute Sempach Switzerland
| | - M. Schaub
- Swiss Ornithological Institute Sempach Switzerland
| | - M. V. Banik
- V.N.Karazin Kharkiv National University Kharkiv Ukraine
| | | | | | | | | | - P. Horch
- Swiss Ornithological Institute Sempach Switzerland
| | - F. Korner
- Swiss Ornithological Institute Sempach Switzerland
| | - M. Müller
- Swiss Ornithological Institute Sempach Switzerland
| | - V. Michel
- Swiss Ornithological Institute Sempach Switzerland
| | | | - D. Shitikov
- Zoology and Ecology Department Moscow Pedagogical State University Moscow Russia
| | - D. Tome
- National Institute of Biology Ljubljana Slovenia
| | - M. Vögeli
- Swiss Ornithological Institute Sempach Switzerland
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Ors T, Ranc N, Pelerin M, Michel V, Favier V, Castelnau O, Mocuta C, Thiaudière D. Microsecond time-resolved X-ray diffraction for the investigation of fatigue behavior during ultrasonic fatigue loading. J Synchrotron Radiat 2019; 26:1660-1670. [PMID: 31490157 PMCID: PMC6730622 DOI: 10.1107/s1600577519008518] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Accepted: 06/14/2019] [Indexed: 06/10/2023]
Abstract
A new method based on time-resolved X-ray diffraction is proposed in order to measure the elastic strain and stress during ultrasonic fatigue loading experiments. Pure Cu was chosen as an example material for the experiments using a 20 kHz ultrasonic fatigue machine mounted on the six-circle diffractometer available at the DiffAbs beamline on the SOLEIL synchrotron facility in France. A two-dimensional hybrid pixel X-ray detector (XPAD3.2) was triggered by the strain gage signal in a synchronous data acquisition scheme (pump-probe-like). The method enables studying loading cycles with a period of 50 µs, achieving a temporal resolution of 1 µs. This allows a precise reconstruction of the diffraction patterns during the loading cycles. From the diffraction patterns, the position of the peaks, their shifts and their respective broadening can be deduced. The diffraction peak shift allows the elastic lattice strain to be estimated with a resolution of ∼10-5. Stress is calculated by the self-consistent scale-transition model through which the elastic response of the material is estimated. The amplitudes of the cyclic stresses range from 40 to 120 MPa and vary linearly with respect to the displacement applied by the ultrasonic machine. Moreover, the experimental results highlight an increase of the diffraction peak broadening with the number of applied cycles.
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Affiliation(s)
- T. Ors
- Laboratoire PIMM, CNRS, ENSAM, HESAM, 151 Boulevard de l’Hôpital, 75013 Paris, France
| | - N. Ranc
- Laboratoire PIMM, CNRS, ENSAM, HESAM, 151 Boulevard de l’Hôpital, 75013 Paris, France
| | - M. Pelerin
- Synchrotron SOLEIL, L’Orme des Merisiers, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette, France
| | - V. Michel
- Laboratoire PIMM, CNRS, ENSAM, HESAM, 151 Boulevard de l’Hôpital, 75013 Paris, France
| | - V. Favier
- Laboratoire PIMM, CNRS, ENSAM, HESAM, 151 Boulevard de l’Hôpital, 75013 Paris, France
| | - O. Castelnau
- Laboratoire PIMM, CNRS, ENSAM, HESAM, 151 Boulevard de l’Hôpital, 75013 Paris, France
| | - C. Mocuta
- Synchrotron SOLEIL, L’Orme des Merisiers, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette, France
| | - D. Thiaudière
- Synchrotron SOLEIL, L’Orme des Merisiers, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette, France
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Coton J, Guinebretière M, Guesdon V, Chiron G, Mindus C, Laravoire A, Pauthier G, Balaine L, Descamps M, Bignon L, Huneau-Salaün A, Michel V. Feather pecking in laying hens housed in free-range or furnished-cage systems on French farms. Br Poult Sci 2019; 60:617-627. [PMID: 31267768 DOI: 10.1080/00071668.2019.1639137] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
1. Beak trimming is currently used in France to avoid the negative consequences of severe feather pecking (SFP). However, this practice is controversial in terms of animal welfare, and forbidden in some European countries.2. This study aimed to assess the prevalence of SFP in French laying hen farms, to describe how farmers manage this behavioural disorder and to better understand the risk factors involved.3. A study was carried out from April 2015 to June 2016. Visits were paid to 79 flocks kept in furnished cages (FC) and 80 flocks in a free-range (FR) system. All the hens had trimmed beaks and were genotypically brown. The information collected included feather cover, skin damage, beak condition, farm and poultry house characteristics, livestock performance and management.4. The prevalence of SFP in FC flocks was estimated at 32.9% (IC = 95%, [22.5; 43.3]) and the prevalence of cannibalism as 2.5% (IC = 95%, [0.7; 8.8]) at 70 weeks of age. The prevalence of SFP in FR flocks was estimated to be 23.8% (IC = 95%, [14.5; 31.1]) and the prevalence of cannibalism was 8.8% (IC = 95%, [4.3; 17.0]) at 61 weeks of age.5. In FC flocks, SFP was associated with the combination of genotype, type and length of perches, cage area per hen, type of lighting, number of hens per cage and farm location. In FR flocks, feather cover was associated with use of the outdoor run, lighting programme, genotype, farm location and date of house construction.
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Affiliation(s)
- J Coton
- Laboratoire de Ploufragan-Plouzané, Zoopole Beaucemaine, ANSES, Ploufragan, France
| | - M Guinebretière
- Laboratoire de Ploufragan-Plouzané, Zoopole Beaucemaine, ANSES, Ploufragan, France
| | | | | | - C Mindus
- Centre INRA de Tours, ITAVI, Nouzilly, France
| | - A Laravoire
- Chambre Régionale d'Agriculture des Pays de la Loire, Angers Cedex 02, France
| | - G Pauthier
- Chambre Régionale d'Agriculture des Pays de la Loire, Angers Cedex 02, France
| | - L Balaine
- Laboratoire de Ploufragan-Plouzané, Zoopole Beaucemaine, ANSES, Ploufragan, France
| | | | - L Bignon
- Centre INRA de Tours, ITAVI, Nouzilly, France
| | - A Huneau-Salaün
- Laboratoire de Ploufragan-Plouzané, Zoopole Beaucemaine, ANSES, Ploufragan, France
| | - V Michel
- Laboratoire de Niort, ANSES, Niort cedex, France
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7
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Michel V, Ulber C, Pöhle D, Köpke B, Engel K, Kaim U, Fawzy A, Funk S, Fornefett J, Baums CG, Eisenberg T. Clinical infection in house rats (Rattus rattus) caused by Streptobacillus notomytis. Antonie Van Leeuwenhoek 2018; 111:1955-1966. [PMID: 29671179 DOI: 10.1007/s10482-018-1085-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Accepted: 04/05/2018] [Indexed: 10/17/2022]
Abstract
Rat bite fever is an under-reported, under-diagnosed emerging zoonosis with worldwide distribution. Besides Spirillum minus, Streptobacillus moniliformis is the major causative microorganism although it usually colonises rats without any clinical signs. A group of house rats (Rattus rattus) kept in a zoo exhibition for educational purposes suffered from neurological signs including disorientation, torticollis, stall walking, ataxia and death. Gross pathological and histo-pathological examinations of the investigated rats revealed high-grade otitis interna et media, from which Streptobacillus notomytis was isolated in pure culture or as the predominant microorganism. This case series underlines a previously expressed hypothesis that R. rattus might be naturally colonised with S. notomytis, whereas the traditional rat bite fever organism, S. moniliformis, might be restricted to the Norway rat (Rattus norvegicus). However, the general paucity of Streptobacillus isolates, especially from their respective animal hosts, precludes definitive proof of these host tropisms. This is the first report of S. notomytis detection outside Asia and Australia and the first evidence for its role as a facultative pathogen in house rats.
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Affiliation(s)
- Viktoria Michel
- Naturschutz-Tierpark Görlitz e. V., Zittauer Str. 43, 02826, Görlitz, Germany
| | - Claudia Ulber
- Landesuntersuchungsanstalt für das Gesundheits- und Veterinärwesen Sachsen (LUA), Jägerstr. 8/10, 01099, Dresden, Germany
| | - Dietrich Pöhle
- Landesuntersuchungsanstalt für das Gesundheits- und Veterinärwesen Sachsen (LUA), Jägerstr. 8/10, 01099, Dresden, Germany
| | - Beate Köpke
- Landesuntersuchungsanstalt für das Gesundheits- und Veterinärwesen Sachsen (LUA), Jägerstr. 8/10, 01099, Dresden, Germany
| | - Katharina Engel
- Landesbetrieb Hessisches Landeslabor (LHL), Schubertstr. 60, 35392, Giessen, Germany
| | - Ute Kaim
- Landesbetrieb Hessisches Landeslabor (LHL), Schubertstr. 60, 35392, Giessen, Germany
| | - Ahmad Fawzy
- Landesbetrieb Hessisches Landeslabor (LHL), Schubertstr. 60, 35392, Giessen, Germany.,Faculty of Veterinary Medicine, Department of Medicine and Infectious Diseases, Cairo University, Giza Square, 12211, Egypt.,Institut für Hygiene und Infektionskrankheiten der Tiere, Justus-Liebig-Universität, Frankfurter Str. 89, 35392, Giessen, Germany
| | - Sophie Funk
- Veterinärmedizinische Fakultät, Zentrum für Infektionsmedizin, Institut für Bakteriologie und Mykologie, Universität Leipzig (IBML), An den Tierkliniken 29, 04103, Leipzig, Germany
| | - Juliane Fornefett
- Veterinärmedizinische Fakultät, Zentrum für Infektionsmedizin, Institut für Bakteriologie und Mykologie, Universität Leipzig (IBML), An den Tierkliniken 29, 04103, Leipzig, Germany
| | - Christoph Georg Baums
- Veterinärmedizinische Fakultät, Zentrum für Infektionsmedizin, Institut für Bakteriologie und Mykologie, Universität Leipzig (IBML), An den Tierkliniken 29, 04103, Leipzig, Germany
| | - Tobias Eisenberg
- Landesbetrieb Hessisches Landeslabor (LHL), Schubertstr. 60, 35392, Giessen, Germany. .,Institut für Hygiene und Infektionskrankheiten der Tiere, Justus-Liebig-Universität, Frankfurter Str. 89, 35392, Giessen, Germany.
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8
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Majlessi L, Sayes F, Bureau JF, Pawlik A, Michel V, Jouvion G, Huerre M, Severgnini M, Consolandi C, Peano C, Brosch R, Touati E, Leclerc C. Colonization with Helicobacter is concomitant with modified gut microbiota and drastic failure of the immune control of Mycobacterium tuberculosis. Mucosal Immunol 2017; 10:1178-1189. [PMID: 28145441 DOI: 10.1038/mi.2016.140] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Accepted: 12/28/2016] [Indexed: 02/04/2023]
Abstract
Epidemiological and experimental observations suggest that chronic microbial colonization can impact the immune control of other unrelated pathogens contracted in a concomitant or sequential manner. Possible interactions between Mycobacterium tuberculosis infection and persistence of other bacteria have scarcely been investigated. Here we demonstrated that natural colonization of the digestive tract with Helicobacter hepaticus in mice is concomitant with modification of the gut microbiota, subclinical inflammation, and drastic impairment of immune control of the growth of subsequently administered M. tuberculosis, which results in severe lung tissue injury. Our results provided insights upon the fact that this prior H. hepaticus colonization leads to failures in the mechanisms that could prevent the otherwise balanced cross-talk between M. tuberculosis and the immune system. Such disequilibrium ultimately leads to the inhibition of control of mycobacterial growth, outbreak of inflammation, and lung pathology. Among the dysregulated immune signatures, we noticed a correlation between the detrimental lung injury and the accumulation of activated T-lymphocytes. Our findings suggest that the impact of prior Helicobacter spp. colonization and subsequent M. tuberculosis parasitism might be greater than previously thought, which is a key point given that both species are among the most frequent invasive bacteria in human populations.
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Affiliation(s)
- L Majlessi
- Institut Pasteur, Unité de Pathogénomique Mycobactérienne Intégrée, Paris, France.,Institut Pasteur, Unité de Régulation Immunitaire et Vaccinologie, Paris, France.,INSERM U1041, Paris, France
| | - F Sayes
- Institut Pasteur, Unité de Pathogénomique Mycobactérienne Intégrée, Paris, France.,Institut Pasteur, Unité de Régulation Immunitaire et Vaccinologie, Paris, France.,INSERM U1041, Paris, France
| | - J-F Bureau
- Institut Pasteur, Unité de Génétique Fonctionnelle des Maladies Infectieuses, Paris, France
| | - A Pawlik
- Institut Pasteur, Unité de Pathogénomique Mycobactérienne Intégrée, Paris, France
| | - V Michel
- Institut Pasteur, Unité de Pathogenèse de Helicobacter, Paris, France.,CNRS ERL3526, Paris, France
| | - G Jouvion
- Institut Pasteur, Unité d'Histopathologie Humaine et Modèles Animaux, Paris, France.,Institut Pasteur, URE Histotechnologie et Pathologie, Paris, France
| | - M Huerre
- Institut Pasteur, URE Histotechnologie et Pathologie, Paris, France.,Institut Curie, Département de Pathologie, Paris, France
| | - M Severgnini
- Institute of Biomedical Technologies, CNR, Segrate, Milan, Italy
| | - C Consolandi
- Institute of Biomedical Technologies, CNR, Segrate, Milan, Italy
| | - C Peano
- Institute of Biomedical Technologies, CNR, Segrate, Milan, Italy
| | - R Brosch
- Institut Pasteur, Unité de Pathogénomique Mycobactérienne Intégrée, Paris, France
| | - E Touati
- Institut Pasteur, Unité de Pathogenèse de Helicobacter, Paris, France.,CNRS ERL3526, Paris, France
| | - C Leclerc
- Institut Pasteur, Unité de Régulation Immunitaire et Vaccinologie, Paris, France.,INSERM U1041, Paris, France
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Houvenaeghel G, Boher J, Michel V, Bannier M, Minsat M, Tallet A, Cohen M, Buttarelli M, Resbeut M, Lambaudie E. Survival after breast cancer local recurrence according to therapeutic strategies. Eur J Surg Oncol 2017; 43:1409-1414. [DOI: 10.1016/j.ejso.2017.04.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 04/04/2017] [Accepted: 04/21/2017] [Indexed: 10/19/2022] Open
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10
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Muller C, Michel V, Scacchi G, Côme GM. THERGAS: a computer program for the evaluation of thermochemical data of molecules and free radicals in the gas phase. ACTA ACUST UNITED AC 2017. [DOI: 10.1051/jcp/1995921154] [Citation(s) in RCA: 252] [Impact Index Per Article: 36.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Langbour N, Michel V, Dilharreguy B, Guehl D, Allard M, Burbaud P. The Cortical Processing of Sensorimotor Sequences is Disrupted in Writer's Cramp. Cereb Cortex 2017; 27:2544-2559. [PMID: 27114174 DOI: 10.1093/cercor/bhw108] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Evidence for pre-existing abnormalities in the sensory and motor systems has been previously reported in writer's cramp (WC). However, the processing of somatosensory information during motor planning has received little attention. We hypothesized that sensorimotor integration processes might be impaired partly due to a disruption in the parieto-premotor network. To test this assumption, we designed 2 nonwriting motor tasks in which subjects had to perform a 4-finger motor sequence either on the basis of sensory stimuli previously memorized (SM task) or freely generated (SG task). Brain activity was measured by combining event-related functional magnetic resonance imaging and coherency electroencephalography in 15 WC patients and 15 normal controls. The bold signal was decreased in patients in both tasks during sensory stimulation but not during movement execution. However, the EEG study showed that coherency was decreased in patients compared with controls, during the delay of the SM task and during the execution of the SG task, on both the whole network and for specific couples of electrodes. Overall, these results demonstrate an endophenotypic impairment in the synchronization of cortical areas within the parieto-premotor network during somatosensory processing and motor planning in WC patients.
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Affiliation(s)
- N Langbour
- Université de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France.,CNRS, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France
| | - V Michel
- Université de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France.,Service de Neurophysiologie Clinique, Centre Hospitalier Universitaire de Bordeaux, 33076 Bordeaux, France
| | - B Dilharreguy
- Université de Bordeaux, INCIA, UMR 5287, F-33400 Talence, France.,CNRS, INCIA, UMR 5287, F-33400 Talence, France
| | - D Guehl
- Université de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France.,CNRS, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France.,Service de Neurophysiologie Clinique, Centre Hospitalier Universitaire de Bordeaux, 33076 Bordeaux, France
| | - M Allard
- Université de Bordeaux, INCIA, UMR 5287, F-33400 Talence, France.,CNRS, INCIA, UMR 5287, F-33400 Talence, France.,Service de Médecine Nucléaire, Centre Hospitalier Universitaire de Bordeaux, 33076 Bordeaux, France
| | - P Burbaud
- Université de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France.,CNRS, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France.,Service de Neurophysiologie Clinique, Centre Hospitalier Universitaire de Bordeaux, 33076 Bordeaux, France
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Wijayarathna R, Sarraj MA, Genovese R, Girling JE, Michel V, Ludlow H, Loveland KL, Meinhardt A, de Kretser DM, Hedger MP. Activin and follistatin interactions in the male reproductive tract: activin expression and morphological abnormalities in mice lacking follistatin 288. Andrology 2017; 5:578-588. [PMID: 28235253 DOI: 10.1111/andr.12337] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Revised: 12/12/2016] [Accepted: 01/11/2017] [Indexed: 12/29/2022]
Abstract
Activin A is an important regulator of testicular and epididymal development and function, as well as inflammation and immunity. In the adult murine reproductive tract, activin A mRNA (Inhba) expression levels are highest in the caput epididymis and decrease progressively towards the distal vas deferens. The activin-binding protein, follistatin (FST), shows the opposite expression pattern, with exceptionally high levels of the Fst288 mRNA variant in the vas deferens. This unique pattern of expression suggests that activin A and follistatin, in particular FST288, play region-specific roles in regulating the epididymis and vas deferens. The cellular distribution of activin and follistatin and structural organization of the male reproductive tract was examined in wild-type and transgenic (TghFST315) mice lacking FST288. Compared to wild-type littermates, TghFST315 mice showed a 50% reduction in serum follistatin and a significant elevation of both activin A and B. Testicular, epididymal and seminal vesicle weights were reduced, but intra-testicular testosterone was normal. A decrease in the epididymal duct diameter in the corpus and thickening of the peritubular smooth muscle in the cauda, together with increased coiling of the proximal vas deferens, were observed in TghFST315 mice. No immune cell infiltrates were detected. Immunohistochemistry indicated that epithelial cells are the main source of activins and follistatin in the epididymis and vas deferens. Activin A, but not activin B, was also localized to sperm heads in the lumen of the epididymis and vas deferens. Expression of Inhba and another immunoregulatory gene, indoleamine-2,3-dioxygenase (Ido-1), was increased approximately twofold in the TghFST315 caput epididymis, but several other genes associated with immunoregulation, inflammation or fibrosis were unaffected. Our novel data indicate that disruption of follistatin expression has significant effects on the testis and epididymis, and suggest an association between activin A and indoleamine-2,3-dioxygenase in the caput epididymis, with implications for the epididymal immunoenvironment.
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Affiliation(s)
- R Wijayarathna
- Centre for Reproductive Health, Hudson Institute of Medical Research, Clayton, VIC, Australia.,Department of Anatomy and Developmental Biology, Monash University, Clayton, VIC, Australia.,Department of Anatomy and Cell Biology, Justus-Liebig University, Giessen, Germany
| | - M A Sarraj
- Centre for Reproductive Health, Hudson Institute of Medical Research, Clayton, VIC, Australia.,Department of Anatomy and Developmental Biology, Monash University, Clayton, VIC, Australia
| | - R Genovese
- Centre for Reproductive Health, Hudson Institute of Medical Research, Clayton, VIC, Australia
| | - J E Girling
- Gynaecology Research Centre, Department of Obstetrics and Gynaecology, The University of Melbourne and Royal Women's Hospital, Parkville, VIC, Australia
| | - V Michel
- Department of Anatomy and Cell Biology, Justus-Liebig University, Giessen, Germany
| | - H Ludlow
- Oxford Brookes University, Oxford, UK
| | - K L Loveland
- Department of Anatomy and Developmental Biology, Monash University, Clayton, VIC, Australia.,School of Clinical Sciences, Monash University, Monash Medical Centre, Clayton, VIC, Australia
| | - A Meinhardt
- Centre for Reproductive Health, Hudson Institute of Medical Research, Clayton, VIC, Australia.,Department of Anatomy and Developmental Biology, Monash University, Clayton, VIC, Australia.,Department of Anatomy and Cell Biology, Justus-Liebig University, Giessen, Germany
| | - D M de Kretser
- Centre for Reproductive Health, Hudson Institute of Medical Research, Clayton, VIC, Australia.,Department of Anatomy and Developmental Biology, Monash University, Clayton, VIC, Australia
| | - M P Hedger
- Centre for Reproductive Health, Hudson Institute of Medical Research, Clayton, VIC, Australia.,Department of Anatomy and Developmental Biology, Monash University, Clayton, VIC, Australia
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More S, Bicout D, Bøtner A, Butterworth A, Calistri P, Depner K, Edwards S, Garin-Bastuji B, Good M, Gortázar Schmidt C, Michel V, Miranda MA, Saxmose Nielsen S, Raj M, Sihvonen L, Spoolder H, Thulke HH, Velarde A, Willeberg P, Winckler C, Adlhoch C, Baldinelli F, Breed A, Brouwer A, Guillemain M, Harder T, Monne I, Roberts H, Cortinas Abrahantes J, Mosbach-Schulz O, Verdonck F, Morgado J, Stegeman A. Urgent request on avian influenza. EFSA J 2017; 15:e04687. [PMID: 32625275 PMCID: PMC7009852 DOI: 10.2903/j.efsa.2016.4687] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Highly pathogenic avian influenza (HPAI) H5N8 is currently causing an epizootic in Europe, infecting many poultry holdings as well as captive and wild bird species in more than 10 countries. Given the clear clinical manifestation, passive surveillance is considered the most effective means of detecting infected wild and domestic birds. Testing samples from new species and non‐previously reported areas is key to determine the geographic spread of HPAIV H5N8 2016 in wild birds. Testing limited numbers of dead wild birds in previously reported areas is useful when it is relevant to know whether the virus is still present in the area or not, e.g. before restrictive measures in poultry are to be lifted. To prevent introduction of HPAIV from wild birds into poultry, strict biosecurity implemented and maintained by the poultry farmers is the most important measure. Providing holding‐specific biosecurity guidance is strongly recommended as it is expected to have a high impact on the achieved biosecurity level of the holding. This is preferably done during peace time to increase preparedness for future outbreaks. The location and size of control and in particular monitoring areas for poultry associated with positive wild bird findings are best based on knowledge of the wider habitat and flight distance of the affected wild bird species. It is recommended to increase awareness among poultry farmers in these established areas in order to enhance passive surveillance and to implement enhanced biosecurity measures including poultry confinement. There is no scientific evidence suggesting a different effectiveness of the protection measures on the introduction into poultry holdings and subsequent spread of HPAIV when applied to H5N8, H5N1 or other notifiable HPAI viruses. This publication is linked to the following EFSA Supporting Publications article: http://onlinelibrary.wiley.com/doi/10.2903/sp.efsa.2016.EN-1142/full
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Miszczycha S, Bel N, Gay-Perret P, Michel V, Montel M, Sergentet-Thevenot D. Short communication: Behavior of different Shiga toxin-producing Escherichia coli serotypes (O26:H11, O103:H2, O145:H28, O157:H7) during the manufacture, ripening, and storage of a white mold cheese. J Dairy Sci 2016; 99:5224-5229. [DOI: 10.3168/jds.2015-10803] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Accepted: 03/04/2016] [Indexed: 11/19/2022]
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15
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Bhushan S, Michel V, Stoschek E, Walecki M, Fijak M, Meinhardt A. Inflammation and infection in the male reproductive tract. J Reprod Immunol 2015. [DOI: 10.1016/j.jri.2015.06.061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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16
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Michel V, Mazzola L, Lemesle M, Vercueil L. Long-term EEG in adults: Sleep-deprived EEG (SDE), ambulatory EEG (Amb-EEG) and long-term video-EEG recording (LTVER). Neurophysiol Clin 2015; 45:47-64. [DOI: 10.1016/j.neucli.2014.11.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Accepted: 11/03/2014] [Indexed: 10/24/2022] Open
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17
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Rosenberg S, Périn B, Michel V, Debs R, Navarro V, Convers P. EEG in adults in the laboratory or at the patient's bedside. Neurophysiol Clin 2015; 45:19-37. [DOI: 10.1016/j.neucli.2014.11.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2014] [Accepted: 11/03/2014] [Indexed: 12/25/2022] Open
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18
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Huneau-Salaün A, Guinebretière M, Michel V. Effect of substrate provision on performance and behaviour of laying hens in the pecking and scratching area of furnished cages. Br Poult Sci 2014; 55:409-18. [PMID: 24875434 DOI: 10.1080/00071668.2014.925086] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
1. An experiment was set up to study the effects of substrate provision on performance and behaviour in the pecking and scratching area (PSA) of non-beak-trimmed hens housed in large furnished cages (60 hens/cage). 2. Three layer hybrids (two brown and one white, ISA-Hendrix Genetics, France) and two substrate conditions (with or without wheat bran automatically distributed on the PSA) were compared in a 3 × 2 experimental design with 12 cages per treatment. 3. Substrate distribution improved laying rate with no impact on the frequency of dirty or cracked eggs. 4. Substrate distribution improved the viability and body integrity of hens, which were not beak-trimmed. 5. Distribution of substrate tended to increase the number of hens in the PSA and enhanced their pecking and scratching behaviours but had a negative impact on the number of dust bath bouts per cage and encouraged dust bathing on the wire floor close to the feeder. 6. The white hens laid more eggs in the nest than the brown birds and used the PSA more for pecking, scratching and dust bathing at the end of the day than the brown hens, underlining the necessity to adapt cage furnishing and rearing management to specific behaviours of each layer genotype.
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Affiliation(s)
- A Huneau-Salaün
- a Anses-Ploufragan-Plouzané Laboratory , Avian and Rabbit Epidemiology and Welfare Unit , Ploufragan , France
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Abstract
As welfare is a multidimensional concept, its assessment should be a multidisciplinary process, providing a comprehensive assessment of animal welfare in any given system. The different measurable aspects of welfare may be turned into welfare indicators and assessed in a scientific manner. Assessment of welfare may combine different approaches that include the assessment of the production system and measurement of animal-based welfare indicators. With both approaches, however, risk managers face difficulties related to the availability of resources for implementing regulations and training staff. Most animal-based welfare indicators have the advantage that they can be measured whatever the production system; they relate to the animal's experience of its own state. It is essential to confirm the reliability of the measures and their robustness to ensure valid welfare assessment, especially for a science-based management approach. Many welfare indicators, even those measured at the individual level, are expressed at group level, as a proportion of the animals. This allows benchmarking and following of trends over time. The decision on what is or is not acceptable from a welfare point of view is an ethical or managerial one. The advantage of a graded welfare indicator is that it allows different thresholds to be set by different people, countries or organisations, depending on the purpose of the assessment. The development of a set of harmonised international welfare indicators for global trade is also discussed.
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Michel V, Mollion S, Souplet P, Valle F. Voice picking : impact sur la santé des salariés. ARCH MAL PROF ENVIRO 2014. [DOI: 10.1016/j.admp.2014.03.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Bergoug H, Guinebretière M, Tong Q, Roulston N, Romanini CEB, Exadaktylos V, Berckmans D, Garain P, Demmers TGM, McGonnell IM, Bahr C, Burel C, Eterradossi N, Michel V. Effect of transportation duration of 1-day-old chicks on postplacement production performances and pododermatitis of broilers up to slaughter age. Poult Sci 2014; 92:3300-9. [PMID: 24235242 DOI: 10.3382/ps.2013-03118] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
This experiment studied the effect of transportation duration of 1-d-old chicks on dehydration, mortality, production performance, and pododermatitis during the growout period. Eggs from the same breeder flock (Ross PM3) were collected at 35, 45, and 56 wk of age, for 3 successive identical experiments. In each experiment, newly hatched chicks received 1 of 3 transportation duration treatments from the hatchery before placement in the on-site rearing facility: no transportation corresponding to direct placement in less than 5 min (T00), or 4 (T04) or 10 h (T10) of transportation. The chicks were housed in 35-m(2) pens (650 birds each) and reared until 35 d old. Hematocrit and chick BW were measured on sample chicks before and after transportation. During the growout period, bird weight, feed uptake, and feed conversion ratio were measured weekly until slaughter. Transportation duration affected BW; T00 groups had a significantly higher BW than T04 and T10 transported birds but this effect lasted only until d 21. No clear effect on hematocrit, feed uptake, feed conversion ratio, or mortality was observed for birds transported up to 10 h. The decrease in weight in T10 birds was associated with less severe pododermatitis. Increasing age of the breeder flock was correlated with reduced egg fertility and hatchability, and also with higher quality and BW of hatched chicks. Chicks from older breeders also exhibited reduced mortality during the growout period.
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Affiliation(s)
- H Bergoug
- UEB-ANSES, Ploufragan-Plouzané Laboratory, Avian and Rabbit Epidemiology and Welfare Unit, BP 53, 22440 Ploufragan, France
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Le Bouquin S, Huneau-Salaün A, Huonnic D, Balaine L, Martin S, Michel V. Aerial dust concentration in cage-housed, floor-housed, and aviary facilities for laying hens. Poult Sci 2013; 92:2827-33. [DOI: 10.3382/ps.2013-03032] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Abstract
1. The aims of this study were (i) to evaluate the prevalence of welfare-related cutaneous lesions in turkeys at the end of the rearing period and (ii) to study the correlations between lesions. 2. The percentage of lesions in each flock was determined by observation at the slaughterhouse. Sixty flocks were investigated in 13 slaughterhouses between April and July 2006. 3. All flocks showed a high proportion of turkeys with footpad lesions, with 40·7% of turkey flocks having severe footpad dermatitis. A significant number of feet had swelling of the footpad and deviated toes (60·0% and 21·4% respectively). Arthritis was observed in 25·4% of the carcases and an average of 30·1% had breast buttons on the keel. 4. Positive correlations were found between evidence of feather pecking and arthritis, toe deviations and swelling of the footpad. Deviated toes, swelling of the feet and feather pecking were negatively linked to the most severe scratches (P < 0·001). 5. A method is proposed to assess turkey welfare at the slaughterhouse based on several criteria: footpad lesions, arthritis, severe scratches, deviated toes, swelling of the footpad and breast buttons.
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Affiliation(s)
- V Allain
- Anses, Laboratoire Ploufragan-Plouzané, BP 53, Ploufragan, France.
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Duvauchelle A, Huneau-Salaün A, Balaine L, Rose N, Michel V. Risk factors for the introduction of avian influenza virus in breeder duck flocks during the first 24 weeks of laying. Avian Pathol 2013; 42:447-56. [PMID: 23941671 DOI: 10.1080/03079457.2013.823145] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
A study was carried out in French breeder duck flocks in 2008 and 2009 to identify practices and events related to the introduction of avian influenza viruses (AIVs). The status of flocks was assessed using serological methods for all subtypes of AIV without typing. Flocks managed with both natural mating and artificial insemination were investigated every 4 weeks from the beginning of the laying period up to seroconversion or for a maximum of 6 months. A questionnaire was completed with the farmer during each visit and 20 female ducks were randomly sampled for blood testing. Only flocks that tested seronegative at the first visit were included in the study (n =151 flocks managed with natural mating or artificial insemination). Data were analysed using survival analysis to identify factors influencing the time to seroconversion. Three separate models were constructed: one for the whole sample, one for natural mating flocks, and one for artificial insemination flocks. Factors related to the time to introduction of AIV included the type of production system linked to artificial insemination practices, the neighbourhood, poor disinfection practices, liquid manure management, presence of wildlife, and vehicles entering the building. No clear relationship could be observed in the serological status of male and female ducks in farms keeping male ducks separately from female ducks for artificial insemination. By respecting carefully biosecurity measures, it should be possible to decrease AIV infection of breeder duck flocks.
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Affiliation(s)
- A Duvauchelle
- a Anses-UEB, Ploufragan-Plouzané Laboratory , Avian and Rabbit Epidemiology and Welfare Unit , Ploufragan , France
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Lupo C, Le Bouquin S, Balaine L, Michel V, Péraste J, Petetin I, Colin P, Jouffe L, Chauvin C. Bayesian network as an aid for Food Chain Information use for meat inspection. Prev Vet Med 2013; 109:25-36. [DOI: 10.1016/j.prevetmed.2012.09.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2011] [Revised: 09/06/2012] [Accepted: 09/08/2012] [Indexed: 10/27/2022]
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Michel V, Prampart E, Mirabito L, Allain V, Arnould C, Huonnic D, Le Bouquin S, Albaric O. Histologically-validated footpad dermatitis scoring system for use in chicken processing plants. Br Poult Sci 2013; 53:275-81. [PMID: 22978583 DOI: 10.1080/00071668.2012.695336] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
1. Footpad dermatitis (FPD) is a recognised welfare problem in broiler chickens. Broiler feet (n = 54) were examined macroscopically and microscopically to determine a reliable correspondence between macroscopic and histological features, and to devise a scoring system that was relevant to bird welfare and easy to use at processing plants. 2. Three types of footpad lesion were defined based on their severity. Type I were mild lesions, visually characterised by scale enlargement and erythema, and histologically by hyperplasia and hyperkeratosis of the epidermis, superficial dermal congestion and oedema. Type II were moderate, superficial lesions, visually characterised by hypertrophic and hyperkeratotic scales covered with yellowish to brownish exudate, and histologically by a prominent pustular and crust-forming dermatitis. Type III lesions were the most pronounced, visually characterised by a thick dark adherent crust, and histologically by extensive ulceration. 3. On the basis of the severity and extent of these three types of lesions, a 5-point scale was devised, i.e. no or type I lesion (score 1), type II lesion (<50% or >50% of footpad, scores 2 and 3 respectively) and type III lesion (<50% or >50% of footpad, scores 4 and 5 respectively). 4. The scoring system has the advantage of making sense in terms of welfare compared with previous schemes. Furthermore, it is histologically validated and easy to use for the routine assessment of broiler welfare in processing plants.
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Affiliation(s)
- V Michel
- Anses-Ploufragan, Unité d'Epidémiologie et Bien-Etre en Aviculture et Cuniculture, Laboratoire d'Etudes et de Recherches Avicoles, Porcines et Piscicoles, BP 53, F-22440 Ploufragan, France.
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Guinebretière M, Huneau-Salaün A, Huonnic D, Michel V. Plumage condition, body weight, mortality, and zootechnical performances: The effects of linings and litter provision in furnished cages for laying hens. Poult Sci 2013; 92:51-9. [DOI: 10.3382/ps.2012-02576] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Heinemann M, Cannone F, Lambaudie E, Michel V, Buttarelli M, Bannier M, Houvenaghel G. [Feasibility study about the single-port in gynecologic oncology surgery]. J Gynecol Obstet Hum Reprod 2012; 41:427-438. [PMID: 22633038 DOI: 10.1016/j.jgyn.2012.04.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2011] [Revised: 03/25/2012] [Accepted: 04/10/2012] [Indexed: 06/01/2023]
Abstract
OBJECTIVES To describe our single-port experience in gynecologic oncology surgery, and emphasize the feasibility to use the single-port in this surgery. PATIENTS AND METHODS It is a retrospective, feasibility study, monocentric. All patients who were operated by the single-port, between 1st January 2010 to 1st November 2011, were included. RESULTS We note that 107 patients were included. We made different interventions: uni- and bilateral salpingo-ovariectomy, hysterectomy, pelvic and para-aortic lymph node sampling or lymphadenectomy in gynecologic malignancies. The median age of the population and the body mass index were respectively 52 and 22.6 kg/m(2). In total, six interventions will be converted. The median hospital stay of patients, all procedures combined, was 2 days. We find low rate of postoperative complications. CONCLUSION Gynecological cancer surgery appears feasible for single-port. However, we need other studies to confirm a benefit of using the single-port compared to conventional laparoscopy.
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Affiliation(s)
- M Heinemann
- Service de chirurgie oncologique 2, institut Paoli-Calmettes, 232, boulevard Sainte-Marguerite, Marseille, France.
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Guinebretière M, Huneau-Salaün A, Huonnic D, Michel V. Cage hygiene, laying location, and egg quality: the effects of linings and litter provision in furnished cages for laying hens. Poult Sci 2012; 91:808-16. [PMID: 22399718 DOI: 10.3382/ps.2011-01881] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
This study investigates the influence of litter provision and linings used for nests and pecking and scratching areas on cage hygiene, laying location, and egg quality. Research was carried out in furnished cages, each housing 60 beak-trimmed ISA Brown hens. Four different treatments were compared in a factorial arrangement, including 2 different nest linings (artificial turf vs. plastic mesh), either used alone or combined with the use of litter (wheat bran) spread over the rubber mat in the pecking and scratching area (PSA). An additional treatment, using artificial turf mat in the PSA and nests (as commonly used in commercial flocks), was used to compare the effect of PSA lining in the other treatments. We observed laying location, the number of dirty and broken eggs, the microbiological contamination of eggshells according to laying location, and general cage hygiene. The use of nests for laying decreased when they were lined with plastic mesh. Eggs laid outside the nest were of lower quality than those laid inside it, and this was particularly true for eggs laid in the PSA. Although hygiene was low on artificial turf mats, eggs laid on PSA covered with a rubber mat were dirtier and had a higher count of mesophilic bacteria on the eggshell than those laid on PSA covered with an artificial turf mat. Rubber mats in PSA were rapidly destroyed and proved to be unsuitable. The provision of litter had no effect on cage hygiene but substantially increased wear on mats. This study shows nest lining and litter provision methods to be key factors that need to be taken into account to encourage the use of nest boxes for laying, and hence, to ensure good egg quality. Further research into new linings for PSA is needed for the future improvement of egg-laying conditions.
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Affiliation(s)
- M Guinebretière
- Anses-French Agency for Food, Environmental and Occupational Health Safety, BP 53 Route de Beaucemaine, 22440 Ploufragan, France.
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Michel V, Houvenaeghel G, Bannier M, Tallet A, Minsat M, Lambaudie E, Salem N, Butarelli M, Resbeut M. P3-12-05: Breast Cancer Recurrence: 2nd Conservative Treatment Versus Mastectomy. Cancer Res 2011. [DOI: 10.1158/0008-5472.sabcs11-p3-12-05] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Objectives: Mastectomy (Mt) is considered standard treatment for isolated local recurrence (LR) of breast carcinoma. The aim of our study was to evaluate a second conservative treatment (defined as lumpectomy followed by interstitial brachytherapy (LpIB)) and to determine if it compares favorably with the current standard treatment. Materials and methods: Between January 1981 and December 2009, 348 patients were treated to the Paoli Calmettes Institute (IPC) for an isolated LR: 232 (66,7 %) underwent Mt, 62 (17,8 %) received a second radio-surgical conservative treatment (LpIB) and 54 (15,5 %) a 2nd single surgical treatment (Lp).
We classified each population according to the well known prognosis factors.
Then, populations Mt and LpIB were matched taking into account these criteria to compare the overall survival (OS), metastasis free survival (MFS) and 2nd local recurrence free survival according to the treatment delivered.
Results: On 348 reviewed patients, with a median follow-up of 73,3 months, 65 patients died (42/232 Mt, 8/62 TecCur, 15/54 Tec) and 100 presented metastasis (64/232 Mt, 15/62 TecCur, 21/54 Tec). There was no difference in MFS for the 2 groups, LpIB and Mt (80 % at 5 years) and the OS was non significantly better in the group LpIB compared to the group Mt (90 % and 82 % at 5 years respectively, p=0,28), whereas in the LpIB group 17% and 30% presented a relapse at 5 years and 10 years respectively.
They subsequently underwent a salvage mastectomy.
Worse results were obtained with lumpectomy alone (OS = 72 % and MFS = 68 % at 5 years) compared with 2 other option treatments.
Conclusion: A second conservative treatment for breast cancer recurrence, i.e. lumpectomy and interstitial brachytherapy, is possible for selected patients, without any negative impact on overall survival, nor metastasis free survival.
Keywords: Local recurrence, interstitial brachytherapy, lumpectomy, conservative treatment, mastectomy, overall survival, metastasis free survival, breast carcinoma.
Citation Information: Cancer Res 2011;71(24 Suppl):Abstract nr P3-12-05.
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Affiliation(s)
- V Michel
- 1Paoli Calmettes Cancer Institute, Marseille, France
| | | | - M Bannier
- 1Paoli Calmettes Cancer Institute, Marseille, France
| | - A Tallet
- 1Paoli Calmettes Cancer Institute, Marseille, France
| | - M Minsat
- 1Paoli Calmettes Cancer Institute, Marseille, France
| | - E Lambaudie
- 1Paoli Calmettes Cancer Institute, Marseille, France
| | - N Salem
- 1Paoli Calmettes Cancer Institute, Marseille, France
| | - M Butarelli
- 1Paoli Calmettes Cancer Institute, Marseille, France
| | - M Resbeut
- 1Paoli Calmettes Cancer Institute, Marseille, France
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Huneau-Salaün A, Le Bouquin S, Bex-Capelle V, Huonnic D, Balaine L, Guillam MT, Squizani F, Segala C, Michel V. Endotoxin concentration in poultry houses for laying hens kept in cages or in alternative housing systems. Br Poult Sci 2011; 52:523-30. [DOI: 10.1080/00071668.2011.617728] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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Menager NE, Coulomb MA, Lambaudie E, Michel V, Mouremble O, Tourette C, Houvenaeghel G. [Interest of robot-assisted laparoscopy in the initial surgical training: Resident survey]. ACTA ACUST UNITED AC 2011; 39:603-8. [PMID: 21855387 DOI: 10.1016/j.gyobfe.2011.07.025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2010] [Accepted: 03/14/2011] [Indexed: 10/17/2022]
Abstract
OBJECTIVE This survey evaluated if residents felt a benefit to their participation in robot-assisted procedures and highlights the interest of robot in the initial surgical training. PATIENTS AND METHODS A questionnaire was submitted to 33 residents participating as assistants in robot-assisted surgical procedures in our department and to seven residents of the Chapel Hill hospital, North Carolina, USA. Items rated their experience with the robot, their feeling during the surgical procedures and whether they thought they improved their technical skills. RESULTS The majority of French residents felt passive during the procedures (97%) or bored (75%); most of them found an immediate interest to learn anatomy (72.7%) and surgical procedures (66.7%). Then, a minority of them reported an improvement of their knowledge in anatomy (39.4%), in surgical procedures (24.2%), and conventional laparoscopy (9.1%). Most of French residents are not willing to repeat the experience as an assistant (81.8%), whereas they showed great interest in practicing robot-assisted surgery later. The oldest residents benefited more than younger in learning anatomy and surgical procedures. US resident' ratings concerning the contribution of the robot in their training were generally more positive. They were all convinced they made progress in anatomy, as in surgical techniques and they all wanted to repeat such procedures. DISCUSSION AND CONCLUSION This work demonstrates the pedagogical value of using the robot for teaching surgical procedures and anatomy. It also suggests the establishment of training programs dedicated to the learning of robot-assisted surgery in gynaecology, in parallel with training in conventional laparoscopy.
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Affiliation(s)
- N-E Menager
- Département de chirurgie générale et oncologique de l'institut Paoli-Calmettes, 232, boulevard Sainte-Marguerite, BP 156, 13273 Marseille cedex 9, France
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Coulomb MA, Menager NE, Lambaudie E, Michel V, Mouremble O, Houvenaeghel G. Place de la coelioscopie robot-assistée dans la formation de l’interne en chirurgie: atout majeur ou gadget moderne ? ONCOLOGIE 2011. [DOI: 10.1007/s10269-010-1979-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Huneau-Salaün A, Michel V, Huonnic D, Balaine L, Le Bouquin S. Factors influencing bacterial eggshell contamination in conventional cages, furnished cages and free-range systems for laying hens under commercial conditions. Br Poult Sci 2010; 51:163-9. [PMID: 20461576 DOI: 10.1080/00071668.2010.482462] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
1. The aim was to assess eggshell contamination in various laying hen-housing systems and to identify factors influencing this contamination. 2. Fifty-eight laying hen farms in France were studied, including 21 flocks housed in conventional cages, 7 in furnished cages and 30 kept on-floor. 3. Sixty eggs per flock were analysed to obtain counts of the total mesophilic flora. Data on equipment and hen management were collected. 4. Mean bacterial count on eggshells tended to be higher in on-floor systems (4.82 +/- 0.51 log CFU/eggshell) than in cage systems (4.57 +/- 0.58 log CFU/eggshell, P = 0.09). 5. Contamination increased with age of the hens, airborne dust concentration, manual packing of the eggs, and packing in plastic rather than in recycled-pulp egg-flats. 6. The effect of the housing system on eggshell contamination, previously described in experimental assays, was confirmed under production conditions.
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Affiliation(s)
- A Huneau-Salaün
- AFSSA, Laboratoire d'Etudes et de Recherches Avicoles, Porcines et Piscicoles, Ploufragan, France.
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Gomes J, Michel V, Magalhães A, Ovesen R, Hansen H, Gärtner F, Touati E, Reis C. 881 Effect of Pteridium aquilinum in gastric epithelial cells: potential synergistic effect with Helicobacter pylori infection. EJC Suppl 2010. [DOI: 10.1016/s1359-6349(10)71675-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Huneau-Salaün A, Michel V, Balaine L, Petetin I, Eono F, Ecobichon F, Bouquin SL. Evaluation of common cleaning and disinfection programmes in battery cage and on-floor layer houses in France. Br Poult Sci 2010; 51:204-12. [DOI: 10.1080/00071661003745794] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Lupo C, Le Bouquin S, Allain V, Balaine L, Michel V, Petetin I, Colin P, Chauvin C. Risk and indicators of condemnation of male turkey broilers in western France, February-July 2006. Prev Vet Med 2010; 94:240-50. [PMID: 20149934 DOI: 10.1016/j.prevetmed.2010.01.011] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2008] [Revised: 01/11/2010] [Accepted: 01/14/2010] [Indexed: 10/19/2022]
Abstract
A field study was conducted to estimate the sanitary condemnation proportion in male turkey broiler flocks, to describe the reasons for condemnation and the related macroscopic lesions, and to investigate whether primary production information would predict the risk of condemnation. Male turkey standard broiler flocks (117) were randomly selected in the 13 slaughterhouses located in Western France, from February to July 2006. The flocks were monitored from their arrival at the slaughterhouse until the results of the post mortem sanitary inspection. Information about rearing conditions, health history, catching and loading conditions, transportation to the slaughterhouse and slaughtering was also collected. Sampling design was considered in the calculations and the condemnation proportion was modelled using a negative binomial regression, accounting for clustering within slaughterhouse. The within-flock weighted average condemnation proportion was 1.8% (95% confidence interval, 1.3-2.3%). Emaciation, arthritis-polyarthritis and congestion were the main reported official reasons for condemnation, representing 76% of the condemned carcases. Three variables were significantly associated with increased risk of condemnation: observed locomotor disorders on the farm, high cumulative mortality 2 weeks before slaughter, and clinical signs observed by the Veterinary Services during the ante mortem inspection at the slaughterhouse. The final model explained 35% of the total variation in condemnation risk. Half of this explained variation could be attributed to locomotor disorders observed during rearing. The sensitivity and specificity of the model to predict a high flock condemnation risk were 80% and 74%, respectively, when using an optimum threshold of 0.95% to define high risk. The results of this study suggested that the variables found to be associated with condemnation proportion were markers of increased risk and could be used as indicators. These risk indicators can easily be retrieved from the pre-existing regulatory document transmitted before flock arrival at the slaughterhouse and could be used to screen flocks before slaughter, according to their expected risk of condemnation.
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Affiliation(s)
- C Lupo
- AFSSA, French Agency for Food Safety, Pig, Poultry and Fishes Veterinary Research Laboratory, Epidemiology and Welfare of Poultry and Rabbits Research Unit, Zoopôle, BP 53, 22440 Ploufragan, France.
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Aviat F, Blanchard B, Michel V, Blanchet B, Branger C, Hars J, Mansotte F, Brasme L, De Champs C, Bolut P, Mondot P, Faliu J, Rochereau S, Kodjo A, Andre-Fontaine G. Leptospira exposure in the human environment in France: A survey in feral rodents and in fresh water. Comp Immunol Microbiol Infect Dis 2009; 32:463-76. [DOI: 10.1016/j.cimid.2008.05.004] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/19/2008] [Indexed: 11/16/2022]
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Solé G, Coupry I, Rooryck C, Guérineau E, Martins F, Devés S, Hubert C, Souakri N, Boute O, Marchal C, Faivre L, Landré E, Debruxelles S, Dieux-Coeslier A, Boulay C, Chassagnon S, Michel V, Routon MC, Toutain A, Philip N, Lacombe D, Villard L, Arveiler B, Goizet C. Bilateral periventricular nodular heterotopia in France: frequency of mutations in FLNA, phenotypic heterogeneity and spectrum of mutations. J Neurol Neurosurg Psychiatry 2009; 80:1394-8. [PMID: 19917821 DOI: 10.1136/jnnp.2008.162263] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Bilateral periventricular nodular heterotopia (BPNH) is the most common form of periventricular heterotopia. Mutations in FLNA, encoding filamin A, are responsible for the X linked dominant form of BPNH (FLNA-BPNH). Recently, atypical phenotypes including BPNH with Ehlers-Danlos syndrome (BPNH-EDS) have been recognised. A total of 44 FLNA mutations have so far been reported in this phenotype. Most of these mutations lead to a truncated protein, but few missense mutations have also been described. Here, the results of a mutation screening conducted in a series of 32 BPNH patients with the identification of 12 novel point mutations in 15 patients are reported. Nine mutations were truncating, while three were missense. Three additional patients with BPNH-EDS and a mutation in FLNA are described. No phenotype-genotype correlations could be established, but these clinical data sustain the importance of cardiovascular monitoring in FLNA-BPNH patients.
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Affiliation(s)
- G Solé
- Laboratoire de Génétique Humaine, Université Victor Segalen Bordeaux 2, 33076 Bordeaux cedex, France
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Allain V, Mirabito L, Arnould C, Colas M, Le Bouquin S, Lupo C, Michel V. Skin lesions in broiler chickens measured at the slaughterhouse: relationships between lesions and between their prevalence and rearing factors. Br Poult Sci 2009; 50:407-17. [PMID: 19735009 DOI: 10.1080/00071660903110901] [Citation(s) in RCA: 98] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
1. This slaughterhouse-based study was to evaluate correlations between cutaneous lesions which are linked to animal welfare. The relationships between these lesions and various rearing factors were investigated. 2. The percentage of lesions in each flock was determined by observation at the slaughterhouse. Fifty-five flocks slaughtered between May 2005 and May 2006 in 8 slaughterhouses were investigated. 3. Data relating to farm management and housing factors during the rearing period were collected retrospectively from 36 of the 55 flocks scored for lesions. 4. A negative correlation was observed between (i) presence of breast blisters and deep hock burns, (ii) presence of breast blisters and deep footpad dermatitis, and (iii) presence of breast burns and scratches. 5. We proposed an assessment of broiler chicken welfare at the slaughterhouse on the basis of several criteria: (i) footpad dermatitis, hock burns and breast burns, (ii) scratches, and (iii) breast blisters. 6. The presence of contact dermatitis was related to litter quality and several management factors. Only scratches and breast blisters were related to high stocking density. The type of lesion was related to genotype. Genotype A (fast-growing) had fewer breast blisters but deeper footpad lesions than B (slower-growing).
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Affiliation(s)
- V Allain
- AFSSA Site de Ploufragan, Ploufragan, France
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Bouquin SL, Jobert J, Larour G, Balaine L, Eono F, Boucher S, Huneau A, Michel V. Risk factors for an acute expression of Epizootic Rabbit Enteropathy syndrome in rabbits after weaning in French kindling-to-finish farms. Livest Sci 2009. [DOI: 10.1016/j.livsci.2009.05.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Damon C, Pinel P, Perrot M, Michel V, Duchesnay E, Poline J, Thirion B. Discriminating Between Populations of Subjects Based on FMRI Data Using Sparse Features Selection and SRDA Classifier. Neuroimage 2009. [DOI: 10.1016/s1053-8119(09)70552-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Kumar D, Nemis-White J, Meilleur M, Michel V, Laverdiere M. P298 Febrile neutropenia (FN) in patients with hematologic malignancy: a Canadian multi-center observational study. Int J Antimicrob Agents 2009. [DOI: 10.1016/s0924-8579(09)70517-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Touati E, Michel V, Correia M, Menghini L, Genovese S, Curini M, Epifano F. Boropinic acid, a novel inhibitor of Helicobacter pylori stomach colonization. J Antimicrob Chemother 2009; 64:210-1. [DOI: 10.1093/jac/dkp136] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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45
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Vivas JR, Regnault B, Michel V, Bussière FI, Avé P, Huerre M, Labigne A, D' Elios MM, Touati E. Interferon gamma-signature transcript profiling and IL-23 upregulation in response to Helicobacter pylori infection. Int J Immunopathol Pharmacol 2008; 21:515-26. [PMID: 18831919 DOI: 10.1177/039463200802100305] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Helicobacter pylori infection is the major cause of gastroduodenal pathologies including gastric cancer. The long persistence of bacteria and the type of immune and inflammatory response determine the clinical issue. In this study, the global gene expression profile after 6 and 12 months of H. pylori infection was investigated in the mouse stomach, using the Affymetrix GeneChip Mouse Expression Array A430. Genes related to the inflammatory and immune responses were focused. Levels of selected transcripts were confirmed by reverse transcription polymerase chain reaction. Twenty- five and nineteen percent of the differentially expressed genes observed at 6 and 12 months post-infection respectively, were related to immune response. They are characterized by an interferon (IFN)gamma-dependent expression associated to a T helper 1 (Th1) polarised response. In-depth analysis revealed that an up-regulation of IL-23p19, took place in the stomach of H. pylori infected-mice. Strong IL-23p19 levels were also confirmed in gastric biopsies from H. pylori-infected patients with chronic gastritis, as compared to healthy subjects. Our microarray analysis revealed also, a high decrease of H+K+-ATPase transcripts in the presence of the H. pylori infection. Association of gastric Th1 immune response with hypochlorhydria through the down-regulation of H+K+-ATPase contributes to the genesis of lesions upon the H. pylori infection. Our data highlight that the up-regulation of IL-23 and of many IFNgamma signature transcripts occur early on during the host response to H. pylori, and suggest that this type of immune response may promote the severity of the induced gastric lesions.
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Affiliation(s)
- J R Vivas
- Unite de Pathogénie Bacterienne des Muqueuses, Institut Pasteur, Paris, France
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Michel V, Peinnequin A, Alonso A, Buguet A, Cespuglio R, Canini F. Decreased heat tolerance is associated with hypothalamo-pituitary-adrenocortical axis impairment. Neuroscience 2007; 147:522-31. [PMID: 17531395 DOI: 10.1016/j.neuroscience.2007.04.035] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2007] [Revised: 04/19/2007] [Accepted: 04/24/2007] [Indexed: 11/24/2022]
Abstract
When rats are exposed to heat, they adapt themselves to the stressor with a wide inter-individual variability. Such differences in heat tolerance may be related to particularities in the hypothalamo-pituitary-adrenocortical (HPA) axis activation. To further this hypothesis, 80 rats instrumented with a telemetric device for abdominal temperature (Tabd) measurement were separated into two groups. Sixty-eight rats were exposed during 90 min at an ambient temperature of 40 degrees C, and 12 rats to an ambient temperature of 22 degrees C. Heat-exposed rats were then divided into three groups using the a posteriori k-means clustering method according to their Tabd level at the end of heat exposure. Heat tolerant rats (Tol, n=30) exhibiting the lowest Tabd showed a slight dehydration, a moderate triglyceride mobilization, but the highest plasma adrenocorticotropic-hormone (ACTH) and corticosterone levels. Conversely, heat exhausted rats (HE, n=14) presented the highest Tabd, a higher degree of dehydration, a greater metabolic imbalance with the lowest plasma triglyceride level and the highest lactate concentration, as well as a lowest plasma corticosterone and ACTH levels. The fact that the proopiomelanocortin (POMC) mRNA content within the pituitary was low despite of a high c-fos mRNA level is also relevant. Current inflammatory processes in HE rats were underlined by lower inhibitory factor kappaBalpha (IkappaBalpha) mRNA and higher tumor necrosis factor-alpha (TNF-alpha) and interleukin-1beta (IL-1beta) mRNA. In conclusion, data show that intolerance to heat exposure is associated to an HPA axis impairment, possibly related to changes occurring in the IkappaBalpha and TNF-alpha mRNA levels.
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Affiliation(s)
- V Michel
- Département des Facteurs Humains, Pôle de Neurophysiologie du Stress, Centre de Recherches du Service de Santé des Armées Emile Pardé, 24 Avenue des Maquis du Grésivaudan, F-38702 La Tronche Cédex, France.
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De La Rocque S, Michel V, Plazanet D, Pin R. Remote sensing and epidemiology: examples of applications for two vector-borne diseases. Comp Immunol Microbiol Infect Dis 2004; 27:331-41. [PMID: 15225983 DOI: 10.1016/j.cimid.2004.03.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/25/2004] [Indexed: 11/23/2022]
Abstract
Remote sensing techniques have greatly contributed to improve our capacity to observe our environment and its processes. For about 15 years, the use of satellite images for epidemiological purposes has been largely promoted to determine diseases distributions and their variations through time. In some circumstances, when diseases are strongly related to environmental data such as climate, vegetation or land-use, radiation values can be included in prediction models. In other cases, remote sensing data provide information for drawing thematic layers involved in the epidemiological processes, which may differ according to the different ecotypes and ecosystems. According to its final goal, the users can choose from the panel of available radiometers with specific characteristics including spatial resolution and frequency of data. In this paper, two examples of major vector-borne diseases, namely Animal Trypanosomosis and Bluetongue, illustrate these applications.
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Affiliation(s)
- S De La Rocque
- CIRAD-EMVT, campus de Baillarguet, TA 30 F, 34398 Montpellier Cedex 5, France
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Michel V, Do M, Chong R. The strategies to regulate and to modulate the propulsive forces during gait initiation in lower limb amputees. Exp Brain Res 2004. [DOI: 10.1007/s00221-004-2001-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Michel V, Chong RKY. The strategies to regulate and to modulate the propulsive forces during gait initiation in lower limb amputees. Exp Brain Res 2004; 158:356-65. [PMID: 15167976 DOI: 10.1007/s00221-004-1908-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2003] [Accepted: 02/09/2004] [Indexed: 10/26/2022]
Abstract
We used the framework of motor program adaptability to examine how unilateral above-knee (AK) or below-knee (BK) amputee subjects organize the global and local biomechanical processes of generation of the propulsive forces during gait initiation to overcome the segmental and neuro-muscular asymmetry. The organization of the global biomechanical process refers to the kinematics behavior of the couple center of foot pressure (CoP) and center of mass (CoM); the organization of the local biomechanical process refers to the propulsive forces generated by the prosthetic or intact limb during the anticipatory postural adjustment phase and the step execution phase. Specifically, we examined: i) the strategy to regulate the progression velocity, i.e., to maintain it comparably when the leading limb changed from the prosthetic limb to the intact limb; and ii) the strategy to modulate the progression velocity, i.e., to increase it when gait was initiated with the prosthetic limb vs. intact limb. The kinematics of the CoM and CoP in the amputees showed the same global biomechanical organization that is typically observed in able-bodied subjects, i.e., the production of the forward disequilibrium torque was obtained by a backward shift of the CoP, followed by a forward acceleration of the CoM. However, gait initiation was achieved by using a different local strategy depending on which limb was used to initiate the step. For the regulation of the CoM progression velocity, when the gait was initiated with the intact limb, the slope of the progression velocity during the anticipatory postural adjustment phase (APA) was steeper and lasted longer, the step execution duration was shorter, and the variation of the CoM speed was lower. In other words, to regulate the speed of progression, the amputee subjects controlled the spatial and temporal parameters of the propulsive forces. In the modulation of the CoM progression velocity, when the gait was initiated with the intact limb, the amputees controlled only the intensity of the propulsive forces during both the APA and step execution phases. In contrast, when the gait was initiated with the prosthetic limb, the modulation resulted mainly from the propulsive forces generated during the step execution phase. These different strategies are discussed in terms of the subject's capacity to adapt the motor program for gait initiation to new constraints.
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Affiliation(s)
- V Michel
- Laboratoire de Physiologie du Mouvement, INSERM U483, Université Paris-Sud, 91405 Orsay, France.
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Affiliation(s)
- V Michel
- Unité de Protection Animale, AFSSA, Beaucemaine, BP 53, 22440 Ploufragan, France
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