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Gresnigt MS, Rekiki A, Rasid O, Savers A, Jouvion G, Dannaoui E, Parlato M, Fitting C, Brock M, Cavaillon JM, van de Veerdonk FL, Ibrahim-Granet O. Reducing hypoxia and inflammation during invasive pulmonary aspergillosis by targeting the Interleukin-1 receptor. Sci Rep 2016; 6:26490. [PMID: 27215684 PMCID: PMC4877709 DOI: 10.1038/srep26490] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Accepted: 05/04/2016] [Indexed: 01/05/2023] Open
Abstract
Hypoxia as a result of pulmonary tissue damage due to unresolved inflammation during invasive pulmonary aspergillosis (IPA) is associated with a poor outcome. Aspergillus fumigatus can exploit the hypoxic microenvironment in the lung, but the inflammatory response required for fungal clearance can become severely disregulated as a result of hypoxia. Since severe inflammation can be detrimental to the host, we investigated whether targeting the interleukin IL-1 pathway could reduce inflammation and tissue hypoxia, improving the outcome of IPA. The interplay between hypoxia and inflammation was investigated by in vivo imaging of hypoxia and measurement of cytokines in the lungs in a model of corticosteroid immunocompromised and in Cxcr2 deficient mice. Severe hypoxia was observed following Aspergillus infection in both models and correlated with development of pulmonary inflammation and expression of hypoxia specific transcripts. Treatment with IL-1 receptor antagonist reduced hypoxia and slightly, but significantly reduced mortality in immunosuppressed mice, but was unable to reduce hypoxia in Cxcr2(-/-) mice. Our data provides evidence that the inflammatory response during invasive pulmonary aspergillosis, and in particular the IL-1 axis, drives the development of hypoxia. Targeting the inflammatory IL-1 response could be used as a potential immunomodulatory therapy to improve the outcome of aspergillosis.
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Affiliation(s)
- Mark S Gresnigt
- Unité de recherche Cytokines &Inflammation, Institut Pasteur, Paris.,Department of Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | | | - Orhan Rasid
- Unité de recherche Cytokines &Inflammation, Institut Pasteur, Paris
| | - Amélie Savers
- Fungal Genetics and Biology, School of Life Sciences, University of Nottingham, UK
| | - Grégory Jouvion
- Unité Histopathologie Humaine et Modèles Animaux, Institut Pasteur, Paris France
| | - Eric Dannaoui
- Paris-Descartes University, Faculty of Medicine, APHP, European Georges Pompidou Hospital, Parasitology-Mycology Unit, Microbiology department, Paris, France
| | - Marianna Parlato
- INSERM UMR S1163 Institut Imagine, Laboratoire d'Immunité Intestinale, Paris France
| | | | - Matthias Brock
- Fungal Genetics and Biology, School of Life Sciences, University of Nottingham, UK
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Satoh-Takayama N, Serafini N, Verrier T, Rekiki A, Renauld JC, Frankel G, Di Santo JP. The chemokine receptor CXCR6 controls the functional topography of interleukin-22 producing intestinal innate lymphoid cells. Immunity 2014; 41:776-88. [PMID: 25456160 DOI: 10.1016/j.immuni.2014.10.007] [Citation(s) in RCA: 124] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Accepted: 10/16/2014] [Indexed: 12/26/2022]
Abstract
Interleukin-22 (IL-22) plays a critical role in mucosal defense, although the molecular mechanisms that ensure IL-22 tissue distribution remain poorly understood. We show that the CXCL16-CXCR6 chemokine-chemokine receptor axis regulated group 3 innate lymphoid cell (ILC3) diversity and function. CXCL16 was constitutively expressed by CX3CR1(+) intestinal dendritic cells (DCs) and coexpressed with IL-23 after Citrobacter rodentium infection. Intestinal ILC3s expressed CXCR6 and its ablation generated a selective loss of the NKp46(+) ILC3 subset, a depletion of intestinal IL-22, and the inability to control C. rodentium infection. CD4(+) ILC3s were unaffected by CXCR6 deficiency and remained clustered within lymphoid follicles. In contrast, the lamina propria of Cxcr6(-/-) mice was devoid of ILC3s. The loss of ILC3-dependent IL-22 epithelial stimulation reduced antimicrobial peptide expression that explained the sensitivity of Cxcr6(-/-) mice to C. rodentium. Our results delineate a critical CXCL16-CXCR6 crosstalk that coordinates the intestinal topography of IL-22 secretion required for mucosal defense.
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Affiliation(s)
- Naoko Satoh-Takayama
- Innate Immunity Unit, Institut Pasteur, 25 rue du Docteur Roux, 75724 Paris, France; Inserm U668, 75724 Paris, France.
| | - Nicolas Serafini
- Innate Immunity Unit, Institut Pasteur, 25 rue du Docteur Roux, 75724 Paris, France; Inserm U668, 75724 Paris, France
| | - Thomas Verrier
- Innate Immunity Unit, Institut Pasteur, 25 rue du Docteur Roux, 75724 Paris, France; Inserm U668, 75724 Paris, France
| | - Abdessalem Rekiki
- Innate Immunity Unit, Institut Pasteur, 25 rue du Docteur Roux, 75724 Paris, France; Inserm U668, 75724 Paris, France
| | - Jean-Christophe Renauld
- Ludwig Institute for Cancer Research, Experimental Medicine Unit, Université Catholique de Louvain, Brussels, 1200 Belgium
| | - Gad Frankel
- MRC Centre for Molecular Bacteriology and Infection, Department of Life Sciences, Imperial College London, London SW7 2AZ, UK
| | - James P Di Santo
- Innate Immunity Unit, Institut Pasteur, 25 rue du Docteur Roux, 75724 Paris, France; Inserm U668, 75724 Paris, France.
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Dragavon J, Sinow C, Holland AD, Rekiki A, Theodorou I, Samson C, Blazquez S, Rogers KL, Tournebize R, Shorte SL. A step beyond BRET: Fluorescence by Unbound Excitation from Luminescence (FUEL). J Vis Exp 2014. [PMID: 24894759 PMCID: PMC4207116 DOI: 10.3791/51549] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Fluorescence by Unbound Excitation from Luminescence (FUEL) is a radiative excitation-emission process that produces increased signal and contrast enhancement in vitro and in vivo. FUEL shares many of the same underlying principles as Bioluminescence Resonance Energy Transfer (BRET), yet greatly differs in the acceptable working distances between the luminescent source and the fluorescent entity. While BRET is effectively limited to a maximum of 2 times the Förster radius, commonly less than 14 nm, FUEL can occur at distances up to µm or even cm in the absence of an optical absorber. Here we expand upon the foundation and applicability of FUEL by reviewing the relevant principles behind the phenomenon and demonstrate its compatibility with a wide variety of fluorophores and fluorescent nanoparticles. Further, the utility of antibody-targeted FUEL is explored. The examples shown here provide evidence that FUEL can be utilized for applications where BRET is not possible, filling the spatial void that exists between BRET and traditional whole animal imaging.
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Affiliation(s)
- Joseph Dragavon
- Plate-Forme d'Imagerie Dynamique, Imagopole, Institut Pasteur;
| | - Carolyn Sinow
- Department of Radiation Oncology, Stanford School of Medicine
| | | | | | - Ioanna Theodorou
- Service Hospitalier Frédéric Joliot, Institut d'Imagerie Biomédicale
| | | | | | | | - Régis Tournebize
- Plate-Forme d'Imagerie Dynamique, Imagopole, Institut Pasteur; Unité INSERM U786, Institut Pasteur; Unité de Pathogénie Microbienne Moléculaire, Institut Pasteur
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Dragavon J, Rekiki A, Theodorou I, Samson C, Blazquez S, Rogers KL, Tournebize R, Shorte S. In vitro and in vivo demonstrations of Fluorescence by Unbound Excitation from Luminescence (FUEL). Methods Mol Biol 2014; 1098:259-270. [PMID: 24166383 DOI: 10.1007/978-1-62703-718-1_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Bioluminescence imaging is a powerful technique that allows for deep-tissue analysis in living, intact organisms. However, in vivo optical imaging is compounded by difficulties due to light scattering and absorption. While light scattering is relatively difficult to overcome and compensate, light absorption by biological tissue is strongly dependent upon wavelength. For example, light absorption by mammalian tissue is highest in the blue-yellow part of the visible energy spectrum. Many natural bioluminescent molecules emit photonic energy in this range, thus in vivo optical detection of these molecules is primarily limited by absorption. This has driven efforts for probe development aimed to enhance photonic emission of red light that is absorbed much less by mammalian tissue using either direct genetic manipulation, and/or resonance energy transfer methods. Here we describe a recently identified alternative approach termed Fluorescence by Unbound Excitation from Luminescence (FUEL), where bioluminescent molecules are able to induce a fluorescent response from fluorescent nanoparticles through an epifluorescence mechanism, thereby significantly increasing both the total number of detectable photons as well as the number of red photons produced.
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Affiliation(s)
- Joe Dragavon
- Plate-Forme d'Imagerie Dynamique, Imagopole, Institut Pasteur, Paris, France
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Holland AD, Rückerl F, Dragavon JM, Rekiki A, Tinevez JY, Tournebize R, Shorte SL. In vitro characterization of Fluorescence by Unbound Excitation from Luminescence: broadening the scope of energy transfer. Methods 2013; 66:353-61. [PMID: 24045025 DOI: 10.1016/j.ymeth.2013.09.005] [Citation(s) in RCA: 3] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2013] [Revised: 08/20/2013] [Accepted: 09/02/2013] [Indexed: 01/10/2023] Open
Abstract
Energy transfer mechanisms represent the basis for an array of valuable tools to infer interactions in vitro and in vivo, enhance detection or resolve interspecies distances such as with resonance. Based upon our own previously published studies and new results shown here we present a novel framework describing for the first time a model giving a view of the biophysical relationship between Fluorescence by Unbound Excitation from Luminescence (FUEL), a conventional radiative excitation-emission process, and bioluminescence resonance energy transfer. We show here that in homogeneous solutions and in fluorophore-targeted bacteria, FUEL is the dominant mechanism responsible for the production of red-shifted photons. The minor resonance contribution was ascertained by comparing the intensity of the experimental signal to its theoretical resonance counterpart. Distinctive features of the in vitro FUEL signal include a macroscopic depth dependency, a lack of enhancement upon targeting at a constant fluorophore concentration cf and a non-square dependency on cf. Significantly, FUEL is an important, so far overlooked, component of all resonance phenomena which should guide the design of appropriate controls when elucidating interactions. Last, our results highlight the potential for FUEL as a means to enhance in vivo and in vitro detection through complex media while alleviating the need for targeting.
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Affiliation(s)
- Alexandra D Holland
- Plate-Forme d'Imagerie Dynamique, Imagopole, Institut Pasteur, 25-28 Rue du Dr. Roux, 75724 Paris cedex 15, France
| | - Florian Rückerl
- Plate-Forme d'Imagerie Dynamique, Imagopole, Institut Pasteur, 25-28 Rue du Dr. Roux, 75724 Paris cedex 15, France
| | - Joseph M Dragavon
- Plate-Forme d'Imagerie Dynamique, Imagopole, Institut Pasteur, 25-28 Rue du Dr. Roux, 75724 Paris cedex 15, France
| | - Abdessalem Rekiki
- Plate-Forme d'Imagerie Dynamique, Imagopole, Institut Pasteur, 25-28 Rue du Dr. Roux, 75724 Paris cedex 15, France
| | - Jean-Yves Tinevez
- Plate-Forme d'Imagerie Dynamique, Imagopole, Institut Pasteur, 25-28 Rue du Dr. Roux, 75724 Paris cedex 15, France
| | - Régis Tournebize
- Plate-Forme d'Imagerie Dynamique, Imagopole, Institut Pasteur, 25-28 Rue du Dr. Roux, 75724 Paris cedex 15, France; Unité INSERM U786, Institut Pasteur, 28 rue du Dr Roux, 75724 Paris cedex 15, France.
| | - Spencer L Shorte
- Plate-Forme d'Imagerie Dynamique, Imagopole, Institut Pasteur, 25-28 Rue du Dr. Roux, 75724 Paris cedex 15, France.
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Mohamad KY, Rekiki A, Berri M, Rodolakis A. Recombinant 35-kDa inclusion membrane protein IncA as a candidate antigen for serodiagnosis of Chlamydophila pecorum. Vet Microbiol 2009; 143:424-8. [PMID: 19969431 DOI: 10.1016/j.vetmic.2009.11.017] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2009] [Revised: 11/09/2009] [Accepted: 11/12/2009] [Indexed: 10/20/2022]
Abstract
Chlamydophila pecorum strains are commonly found in the intestine and vaginal mucus of asymptomatic ruminants and may therefore induce a positive serological response when the animals are tested for C. abortus. They have also been associated with different pathological diseases in ruminants, swine and koala. The aim of this study was to identify specific C. pecorum immunodominant antigens which could be used in ELISA tests allowing to distinguish between animals infected with C. pecorum and those infected with other chlamydial species. A gene encoding 35-kDa inclusion membrane protein incA of C. pecorum was isolated by immunoscreening of the C. pecorum DNA library using ovine anti-C. pecorum antibodies. The recombinant IncA protein did not react with a murine serum directed against C. abortus but did react with a specific monoclonal antibody of C. pecorum and toward several ovine serum samples obtained after experimental infection with different C. pecorum strains. This protein could be a good candidate for specific diagnosis of C. pecorum infection.
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Affiliation(s)
- Khalil Yousef Mohamad
- Institut National de la Recherche Agronomique (INRA), UR1282, Infectiologie Animale et Santé Publique, F-37380 Nouzilly (Tours), France
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Berri M, Rekiki A, Boumedine KS, Rodolakis A. Simultaneous differential detection of Chlamydophila abortus, Chlamydophila pecorum and Coxiella burnetii from aborted ruminant's clinical samples using multiplex PCR. BMC Microbiol 2009; 9:130. [PMID: 19570194 PMCID: PMC2725139 DOI: 10.1186/1471-2180-9-130] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2008] [Accepted: 07/01/2009] [Indexed: 12/04/2022] Open
Abstract
Background Chlamydiosis and Q fever, two zoonosis, are important causes of ruminants' abortion around the world. They are caused respectively by strictly intracellular and Gram negative bacterium Chlamydophila abortus (Cp. abortus) and Coxiella burnetii (C. burnetii). Chlamydophila pecorum (Cp. pecorum) is commonly isolated from the digestive tract of clinically inconspicuous ruminants but the abortive and zoonotic impact of this bacterium is still unknown because Cp. pecorum is rarely suspected in abortion cases of small ruminants. We have developed a multiplex PCR (m-PCR) for rapid simultaneous differential detection of Cp. abortus, Cp. pecorum and C. burnetii in clinical samples taken from infected animals. Results Specific PCR primers were designed and a sensitive and specific m-PCR was developed to detect simultaneously, in one tube reaction, three specific fragments of 821, 526 and 687-bp long for Cp. abortus, Cp. pecorum and C. burnetii respectively. This m-PCR assay was performed on 253 clinical samples taken from infected ruminant's flocks that have showed problems of abortion diseases. Thus, 67 samples were infected by either one of the three pathogens: 16 (13 vaginal swabs and 3 placentas) were positive for Cp. abortus, 2 were positive for Cp. pecorum (1 vaginal swab and 1 placenta) and 49 samples (33 vaginal swabs, 11 raw milks, 4 faeces and 1 placenta) were positive for C. burnetii. Two vaginal swabs were m-PCR positive of both Cp. abortus and C. burnetii and none of the tested samples was shown to be infected simultaneously with the three pathogens. Conclusion We have successfully developed a rapid multiplex PCR that can detect and differentiate Cp. abortus, Cp. pecorum and C. burnetii; with a good sensitivity and specificity. The diagnosis of chlamydiosis and Q fever may be greatly simplified and performed at low cost. In addition, the improvement in diagnostic techniques will enhance our knowledge regarding the prevalence and the pathogenetic significance of Q fever and chlamydiosis.
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Affiliation(s)
- Mustapha Berri
- Institut National de la Recherche Agronomique (INRA), UR1282, Infectiologie Animale et Santé Publique (IASP), F-37380 Nouzilly, France.
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Mohamad KY, Rekiki A, Myers G, Bavoil PM, Rodolakis A. Identification and characterisation of coding tandem repeat variants inincAgene ofChlamydophila pecorum. Vet Res 2008; 39:56. [DOI: 10.1051/vetres:2008032] [Citation(s) in RCA: 16] [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: 03/05/2008] [Accepted: 07/23/2008] [Indexed: 12/28/2022] Open
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Rekiki A, Hammami S, Rodolakis A. Comparative evaluation of a new commercial recombinant ELISA and the complement fixation test for the diagnosis of Chlamydophila abortus infection in naturally infected flocks in Tunisia. Small Rumin Res 2006. [DOI: 10.1016/j.smallrumres.2005.06.031] [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: 10/25/2022]
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Bouakane A, Rekiki A, Rodolakis A. Protection of pregnant mice against placental and splenic infection by three strains of Chlamydophila abortus
with a live 1B vaccine. Vet Rec 2005; 157:771-4. [PMID: 16339980 DOI: 10.1136/vr.157.24.771] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
The efficacy of a live 1B vaccine against three strains of Chlamydophila abortus, AB16, LLG and POS, was assessed in pregnant mice in terms of the reduction in the levels of infection recorded in their placentas, fetuses and spleens. The vaccine was more effective against the AB16 strain than against the LLG and POS strains, suggesting that there are antigenic differences between the three strains.
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Affiliation(s)
- A Bouakane
- Unité de Pathologie Infectieuse et Immunologie, INRA-Centre de Tours, 37380 Nouzilly, France
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Rekiki A, Bouakane A, Rodolakis A. Combined vaccination of live 1B Chlamydophila abortus and killed phase I Coxiella burnetii vaccine does not destroy protection against chlamydiosis in a mouse model. Can J Vet Res 2004; 68:226-8. [PMID: 15352550 PMCID: PMC1142145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/30/2023]
Abstract
Q fever and chlamydiosis often affect ovine and caprine flocks simultaneously or successively. Combination vaccines effective against these 2 diseases would be of great value in veterinary medicine. Unfortunately, the current effective vaccines are a live vaccine for chlamydiosis and killed vaccine for Q fever. Vaccination of mice with live chlamydiosis vaccine 1B and killed phase I vaccine against Q fever at 2 points on the back at the same time produced good protection against chlamydial abortion. This suggests that it may be possible to vaccinate ewes and goats against chlamydiosis and Q fever simultaneously.
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Affiliation(s)
- Abdessalem Rekiki
- Unité de Pathologie Infectieuse et Immunologie, INRA-Centre de Tours, Nouzilly 37380 France
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Rekiki A, Bouakane A, Hammami S, El Idrissi AH, Bernard F, Rodolakis A. Efficacy of live Chlamydophila abortus vaccine 1B in protecting mice placentas and foetuses against strains of Chlamydophila pecorum isolated from cases of abortion. Vet Microbiol 2004; 99:295-9. [PMID: 15066732 DOI: 10.1016/j.vetmic.2004.01.010] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [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: 08/20/2003] [Revised: 12/16/2003] [Accepted: 01/05/2004] [Indexed: 11/20/2022]
Abstract
The efficacy of Chlamydophila abortus vaccine strain 1B in protecting against two selected Chlamydophila pecorum strains, isolated from an aborted goat (M14) in Morocco and a ewe (AB10) in France, was investigated in a mouse model, by comparing the reduction in number of bacteria in the placentas of vaccinated mice challenged intraperitoneally at 11 days of pregnancy with the reference C. abortus (AB7) and C. pecorum (M14, or AB10) strains, to those of unvaccinated mice. Vaccine 1B was shown to provide effective protection against the field strains of C. pecorum, since it significantly reduced the placental Chlamydophila colonisation. The two C. pecorum strains were not sufficiently abortifacient in mice to use reduction in abortion as a criterion of protection.
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Affiliation(s)
- A Rekiki
- Unité de Pathologie Infectieuse et Immunologie, INRA-Centre de Tours, 37380 Nouzilly, France
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Rekiki A, Sidi-Boumedine K, Souriau A, Jemli J, Hammami S, Rodolakis A. Isolation and characterisation of local strains of Chlamydophila abortus (Chlamydia psittaci serotype 1) from Tunisia. Vet Res 2002; 33:215-22. [PMID: 11944809 DOI: 10.1051/vetres:2002009] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Chlamydiosis is one of the major diseases that can lead to abortion in ewes. Since 1997, in 5 regions of Tunisia, Chlamydia-related abortions have been reported in 15 sheep and goat flocks. One hundred and sixty-six sera and 50 vaginal swab samples were collected from adult ewes. Chlamydial antigens were detected in 29 (58%) of the vaginal swabs using Enzyme Linked Immunosorbent Assay (ELISA) while 9 (18%) were positive by cell culture. Five strains were recovered from 4 different sheep flocks. Monoclonal antibody profiles and restriction fragment length polymorphism (RFLP) analysis of the 16S-23S rRNA spacer region showed that these isolates were C. abortus. Using amplified fragment length polymorphism (AFLP), these Tunisian strains were shown to exhibit the same pattern as strains isolated in France.
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