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Thomas J, Infantes-Lorenzo JA, Moreno I, Romero B, Garrido JM, Juste R, Domínguez M, Domínguez L, Gortazar C, Risalde MA. A new test to detect antibodies against Mycobacterium tuberculosis complex in red deer serum. Vet J 2018; 244:98-103. [PMID: 30825903 DOI: 10.1016/j.tvjl.2018.12.021] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 12/16/2018] [Accepted: 12/17/2018] [Indexed: 02/06/2023]
Abstract
Red deer (Cervus elaphus) farming is a growing economic activity worldwide. However, the capacity of this species to act as reservoir of animal tuberculosis (TB) poses a threat to other wildlife and to livestock. Diagnostic assay accuracy in this species is therefore highly relevant for prevention and control measures. Our aim was to evaluate the diagnostic performance of the protein complex P22, obtained from Mycobacterium bovis derived purified protein derivative (bPPD), as a candidate antigen for the detection of antibodies against Mycobacterium tuberculosis complex (MTC). We assessed the performance of this new antigen in indirect enzyme-linked immunosorbent assays (ELISA) in TB-positive and TB-negative red deer, in comparison with a bPPD-based ELISA. The P22 ELISA achieved a higher specificity (Sp) and similar sensitivity (Se) in comparison with the bPPD ELISA at all the cut-off points considered. The P22 ELISA yielded optimal Sp (99.02%; 95% confidence intervals [CI95%]: 96.5-99.8) and appropriate Se (70.1%; CI95%: 63.6-76) at the selected cut-off point of 100%. These results suggest that P22 can be used as an alternative antigen in the immunodiagnosis of animal TB through the use of an ELISA-type detection of antibodies against MTC in red deer, thus contributing to the diagnosis of animal TB in this species as a measure for further disease prevention and control programs.
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Affiliation(s)
- J Thomas
- SaBio (Health and Biotechnology), Instituto de Investigación en Recursos Cinegéticos IREC (CSIC-UCLM), Ciudad Real, Spain; Indian Council of Agricultural Research (ICAR), New Delhi, India
| | - J A Infantes-Lorenzo
- VISAVET Health Surveillance Centre, Complutense University of Madrid, Madrid, Spain; Departamento de Sanidad Animal, Facultad de Veterinaria, Universidad Complutense, Madrid, Spain
| | - I Moreno
- Unidad de Inmunología Microbiana, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Majadahonda, Madrid, Spain
| | - B Romero
- VISAVET Health Surveillance Centre, Complutense University of Madrid, Madrid, Spain
| | - J M Garrido
- NEIKER-Tecnalia, Animal Health Department, Derio, Bizkaia, Spain
| | - R Juste
- Servicio Regional de Investigación y Desarrollo Agrario (SERIDA), Villaviciosa, Asturias, Spain
| | - M Domínguez
- Unidad de Inmunología Microbiana, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Majadahonda, Madrid, Spain
| | - L Domínguez
- VISAVET Health Surveillance Centre, Complutense University of Madrid, Madrid, Spain; Departamento de Sanidad Animal, Facultad de Veterinaria, Universidad Complutense, Madrid, Spain
| | - C Gortazar
- SaBio (Health and Biotechnology), Instituto de Investigación en Recursos Cinegéticos IREC (CSIC-UCLM), Ciudad Real, Spain.
| | - M A Risalde
- Dpto. de Anatomía y Anatomía Patológica Comparadas, Facultad de Veterinaria, Universidad de Córdoba (UCO), Agrifood Excellence International Campus (ceiA3), Córdoba, Spain; Infectious Diseases Unit, Instituto Maimonides de Investigación Biomédica de Córdoba (IMIBIC), Hospital Universitario Reina Sofía de Córdoba, Universidad de Córdoba, Cordoba, Spain
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2
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Bezos J, Casal C, Álvarez J, Roy A, Romero B, Rodríguez-Bertos A, Bárcena C, Díez A, Juste R, Gortázar C, Puentes E, Aguiló N, Martín C, de Juan L, Domínguez L. Evaluation of the Mycobacterium tuberculosis SO 2 vaccine using a natural tuberculosis infection model in goats. Vet J 2017; 223:60-67. [PMID: 28671074 DOI: 10.1016/j.tvjl.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)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Revised: 04/06/2017] [Accepted: 04/13/2017] [Indexed: 11/27/2022]
Abstract
The development of new vaccines against animal tuberculosis (TB) is a priority for improving the control and eradication of this disease, particularly in those species not subjected to compulsory eradication programmes. In this study, the protection conferred by the Mycobacterium tuberculosis SO2 experimental vaccine was evaluated using a natural infection model in goats. Twenty-six goats were distributed in three groups: (1) 10 goats served as a control group; (2) six goats were subcutaneously vaccinated with BCG; and (3) 10 goats were subcutaneously vaccinated with SO2. Four months after vaccination, all groups were merged with goats infected with Mycobacterium bovis or Mycobacterium caprae, and tested over a 40 week period using a tuberculin intradermal test and an interferon-γ assay for mycobacterial reactivity. The severity of lesions was determined at post-mortem examination and the bacterial load in tissues were evaluated by culture. The two vaccinated groups had significantly lower lesion and bacterial culture scores than the control group (P<0.05); at the end of the study, the SO2 vaccinated goats had the lowest lesion and culture scores. These results suggest that the SO2 vaccine provides some protection against TB infection acquired from natural exposure.
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Affiliation(s)
- J Bezos
- MAEVA SERVET SL, Alameda del Valle, Madrid, Spain; Centro de Vigilancia Sanitaria Veterinaria (VISAVET), Universidad Complutense, Madrid, Spain.
| | - C Casal
- Centro de Vigilancia Sanitaria Veterinaria (VISAVET), Universidad Complutense, Madrid, Spain
| | - J Álvarez
- Department of Veterinary Population Medicine, University of Minnesota, St. Paul, MN, USA
| | - A Roy
- Centro de Vigilancia Sanitaria Veterinaria (VISAVET), Universidad Complutense, Madrid, Spain
| | - B Romero
- Centro de Vigilancia Sanitaria Veterinaria (VISAVET), Universidad Complutense, Madrid, Spain
| | - A Rodríguez-Bertos
- Centro de Vigilancia Sanitaria Veterinaria (VISAVET), Universidad Complutense, Madrid, Spain
| | - C Bárcena
- Centro de Vigilancia Sanitaria Veterinaria (VISAVET), Universidad Complutense, Madrid, Spain
| | - A Díez
- MAEVA SERVET SL, Alameda del Valle, Madrid, Spain
| | - R Juste
- Servicio Regional de Investigación y Desarrollo Agrario (SERIDA), Carretera Oviedo, Villaviciosa, Asturias, Spain
| | - C Gortázar
- SaBio, Instituto de Investigación en Recursos Cinegéticos IREC-CSIC-UCLM-JCCM, Ciudad Real, Spain
| | - E Puentes
- BIOFABRI SL, Porriño, Pontevedra, Spain
| | - N Aguiló
- Departamento de Microbiología, Universidad de Zaragoza, ISS Aragón, CIBER de Enfermedades Respiratorias, Spain
| | - C Martín
- Departamento de Microbiología, Universidad de Zaragoza, ISS Aragón, CIBER de Enfermedades Respiratorias, Spain
| | - L de Juan
- Centro de Vigilancia Sanitaria Veterinaria (VISAVET), Universidad Complutense, Madrid, Spain
| | - L Domínguez
- Centro de Vigilancia Sanitaria Veterinaria (VISAVET), Universidad Complutense, Madrid, Spain
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3
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Díez-Delgado I, Rodríguez O, Boadella M, Garrido J, Sevilla IA, Bezos J, Juste R, Domínguez L, Gortázar C. Parenteral Vaccination with Heat-Inactivated Mycobacterium Bovis
Reduces the Prevalence of Tuberculosis-Compatible Lesions in Farmed Wild Boar. Transbound Emerg Dis 2016; 64:e18-e21. [DOI: 10.1111/tbed.12526] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Indexed: 11/28/2022]
Affiliation(s)
- I. Díez-Delgado
- SaBio-IREC (CSIC-UCLM-JCCM); Ciudad Real Spain
- Departamento de Sanidad Animal; Facultad de Veterinaria; Universidad Complutense de Madrid; Madrid Spain
| | - O. Rodríguez
- SABIOtec Spin-Off; Edificio Polivalente UCLM; Ciudad Real Spain
| | - M. Boadella
- SABIOtec Spin-Off; Edificio Polivalente UCLM; Ciudad Real Spain
| | - J.M. Garrido
- Departamento de Sanidad Animal; Instituto Vasco de Investigación y Desarrollo Agrario (NEIKER); Vizcaya Spain
| | - I. A. Sevilla
- Departamento de Sanidad Animal; Instituto Vasco de Investigación y Desarrollo Agrario (NEIKER); Vizcaya Spain
| | - J. Bezos
- Centro de Vigilancia Sanitaria Veterinaria (VISAVET); Universidad Complutense de Madrid; Madrid Spain
| | - R. Juste
- Departamento de Sanidad Animal; Instituto Vasco de Investigación y Desarrollo Agrario (NEIKER); Vizcaya Spain
| | - L. Domínguez
- Centro de Vigilancia Sanitaria Veterinaria (VISAVET); Universidad Complutense de Madrid; Madrid Spain
| | - C. Gortázar
- SaBio-IREC (CSIC-UCLM-JCCM); Ciudad Real Spain
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de Andrés X, Ramírez H, Bertolotti L, San Román B, Glaria I, Crespo H, Jáuregui P, Minguijón E, Juste R, Leginagoikoa I, Pérez M, Luján L, Badiola JJ, Polledo L, García-Marín JF, Riezu JI, Borrás-Cuesta F, de Andrés D, Rosati S, Reina R, Amorena B. An insight into a combination of ELISA strategies to diagnose small ruminant lentivirus infections. Vet Immunol Immunopathol 2013; 152:277-88. [PMID: 23375019 DOI: 10.1016/j.vetimm.2012.12.017] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2012] [Revised: 12/20/2012] [Accepted: 12/28/2012] [Indexed: 02/08/2023]
Abstract
A single broadly reactive standard ELISA is commonly applied to control small ruminant lentivirus (SRLV) spread, but type specific ELISA strategies are gaining interest in areas with highly prevalent and heterogeneous SRLV infections. Short (15-residue) synthetic peptides (n=60) were designed in this study using deduced amino acid sequence profiles of SRLV circulating in sheep from North Central Spain and SRLV described previously. The corresponding ELISAs and two standard ELISAs were employed to analyze sera from sheep flocks either controlled or infected with different SRLV genotypes. Two outbreaks, showing SRLV-induced arthritis (genotype B2) and encephalitis (genotype A), were represented among the infected flocks. The ELISA results revealed that none of the assays detected all the infected animals in the global population analyzed, the assay performance varying according to the genetic type of the strain circulating in the area and the test antigen. Five of the six highly reactive (57-62%) single peptide ELISAs were further assessed, revealing that the ELISA based on peptide 98M (type A ENV-SU5, consensus from the neurological outbreak) detected positives in the majority of the type-A specific sera tested (Se: 86%; Sp: 98%) and not in the arthritic type B outbreak. ENV-TM ELISAs based on peptides 126M1 (Se: 82%; Sp: 95%) and 126M2 0,65 0.77 (Se: 68%; Sp: 88%) detected preferentially caprine arthritis encephalitis (CAEV, type B) and visna/maedi (VMV, type A) virus infections respectively, which may help to perform a preliminary CAEV vs. VMV-like typing of the flock. The use of particular peptide ELISAs and standard tests individually or combined may be useful in the different areas under study, to determine disease progression, diagnose/type infection and prevent its spread.
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Affiliation(s)
- X de Andrés
- Institute of Agrobiotechnology (CSIC-UPNA-Gobierno de Navarra), Navarre, Spain
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5
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Salgado M, Collins MT, Salazar F, Kruze J, Bölske G, Söderlund R, Juste R, Sevilla IA, Biet F, Troncoso F, Alfaro M. Fate of Mycobacterium avium subsp. paratuberculosis after application of contaminated dairy cattle manure to agricultural soils. Appl Environ Microbiol 2011; 77:2122-9. [PMID: 21239557 PMCID: PMC3067322 DOI: 10.1128/aem.02103-10] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [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: 09/06/2010] [Accepted: 01/02/2011] [Indexed: 11/20/2022] Open
Abstract
Details regarding the fate of Mycobacterium avium subsp. paratuberculosis (basonym, Mycobacterium paratuberculosis) after manure application on grassland are unknown. To evaluate this, intact soil columns were collected in plastic pipes (lysimeters) and placed under controlled conditions to test the effect of a loamy or sandy soil composition and the amount of rainfall on the fate of M. paratuberculosis applied to the soil surface with manure slurry. The experiment was organized as a randomized design with two factors and three replicates. M. paratuberculosis-contaminated manure was spread on the top of the 90-cm soil columns. After weekly simulated rainfall applications, water drainage samples (leachates) were collected from the base of each lysimeter and cultured for M. paratuberculosis using Bactec MGIT ParaTB medium and supplements. Grass was harvested, quantified, and tested from each lysimeter soil surface. The identity of all probable M. paratuberculosis isolates was confirmed by PCR for IS900 and F57 genetic elements. There was a lag time of 2 months after each treatment before M. paratuberculosis was found in leachates. The greatest proportions of M. paratuberculosis-positive leachates were from sandy-soil lysimeters in the manure-treated group receiving the equivalent of 1,000 mm annual rainfall. Under the higher rainfall regimen (2,000 mm/year), M. paratuberculosis was detected more often from lysimeters with loamy soil than sandy soil. Among all lysimeters, M. paratuberculosis was detected more often in grass clippings than in lysimeter leachates. At the end of the trial, lysimeters were disassembled and soil cultured at different depths, and we found that M. paratuberculosis was recovered only from the uppermost levels of the soil columns in the treated group. Factors associated with M. paratuberculosis presence in leachates were soil type and soil pH (P < 0.05). For M. paratuberculosis presence in grass clippings, only manure application showed a significant association (P < 0.05). From these findings we conclude that this pathogen tends to move slowly through soils (faster through sandy soil) and tends to remain on grass and in the upper layers of pasture soil, representing a clear infection hazard for grazing livestock and a potential for the contamination of runoff after heavy rains.
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Affiliation(s)
- M Salgado
- Microbiology Department, Faculty of Science, Universidad Austral de Chile, P.O. Box (Casilla) 567, Valdivia, Chile.
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6
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Alzualde A, Moreno F, Martínez-Lage P, Ferrer I, Gorostidi A, Otaegui D, Blázquez L, Atares B, Cardoso S, Martínez de Pancorbo M, Juste R, Rodríguez-Martínez AB, Indakoetxea B, López de Munain A. Somatic mosaicism in a case of apparently sporadic Creutzfeldt-Jakob disease carrying a de novo D178N mutation in the PRNP gene. Am J Med Genet B Neuropsychiatr Genet 2010; 153B:1283-91. [PMID: 20872767 DOI: 10.1002/ajmg.b.31099] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [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: 12/24/2022]
Abstract
Transmissible spongiform encephalopathies (TSEs) are a group of rare fatal neurodegenerative disorders. Creutzfeldt-Jakob disease (CJD) represents the most common form of TSE and can be classified into sporadic, genetic, iatrogenic and variant forms. Genetic cases are related to prion protein gene mutations but they only account for 10-20% of cases. Here we report an apparently sporadic CJD case with negative family history carrying a mutation at codon 178 of prion protein gene. This mutation is a de novo mutation as the parents of the case do not show it. Furthermore the presence of three different alleles (wild type 129M-178D and 129V-178D and mutated 129V-178N), confirmed by different methods, indicates that this de novo mutation is a post-zygotic mutation that produces somatic mosaicism. The proportion of mutated cells in peripheral blood cells and in brain tissue was similar and was estimated at approximately 97%, suggesting that the mutation occurred at an early stage of embryogenesis. Neuropathological examination disclosed spongiform change mainly involving the caudate and putamen, and the cerebral cortex, together with proteinase K-resistant PrP globular deposits in the cerebrum and cerebellum. PrP typing was characterized by a lower band of 21 kDa. This is the first case of mosaicism described in prion diseases and illustrates a potential etiology for apparently sporadic neurodegenerative diseases. In light of this case, genetic counseling for inherited and sporadic forms of transmissible encephalopathies should take into account this possibility for genetic screening procedures.
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Affiliation(s)
- A Alzualde
- Unidad Neurociencias, Instituto de Investigación Biodonostia, San Sebastián, Spain.
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7
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Garrido JM, Vicente J, Carrasco-García R, Galindo RC, Minguijón E, Ballesteros C, Aranaz A, Romero B, Sevilla I, Juste R, de la Fuente J, Gortazar C. Experimental infection of Eurasian wild boar with Mycobacterium avium subsp. avium. Vet Microbiol 2010; 144:240-5. [PMID: 20116184 DOI: 10.1016/j.vetmic.2009.12.041] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2009] [Revised: 12/23/2009] [Accepted: 12/24/2009] [Indexed: 10/20/2022]
Abstract
The Eurasian wild boar (Sus scrofa) is increasingly relevant as a host for several pathogenic mycobacteria. We aimed to characterize the first experimental Mycobacterium avium subsp. avium (MAA) infection in wild boar in order to describe the lesions and the immune response as compared to uninfected controls. Twelve 1-4-month-old wild boar piglets were housed in class III bio-containment facilities. Four concentrations of MAA suspension were used: 10, 10(2) and 10(4) mycobacteria (2 animals each, oropharyngeal route) and 2.5 x 10(6) mycobacteria (2 animals each by the oropharyngeal and nasal routes). No clinical signs were observed and pathology evidenced a low pathogenicity of this MAA strain for this particular host. Bacteriological and pathological evidence of successful infection after experimental inoculation was found for the group challenged with 2.5 x 10(6) mycobacteria. These four wild boar showed a positive IFN-gamma response to the avian PPD and the real-time RT-PCR data revealed that three genes, complement component C3, IFN-gamma and RANTES, were significantly down regulated in infected animals. These results were similar to those found in naturally and experimentally M. bovis-infected wild boar and may constitute biomarkers of mycobacterial infection in this species.
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Affiliation(s)
- J M Garrido
- NEIKER-Tecnalia, Animal Health Department, 48160 Derio, Bizkaia, Spain
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Ballesteros C, Garrido JM, Vicente J, Romero B, Galindo RC, Minguijón E, Villar M, Martín-Hernando MP, Sevilla I, Juste R, Aranaz A, de la Fuente J, Gortázar C. First data on Eurasian wild boar response to oral immunization with BCG and challenge with a Mycobacterium bovis field strain. Vaccine 2009; 27:6662-8. [PMID: 19747578 DOI: 10.1016/j.vaccine.2009.08.095] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2009] [Revised: 08/19/2009] [Accepted: 08/26/2009] [Indexed: 10/20/2022]
Abstract
The Eurasian wild boar (Sus scrofa) is considered a reservoir for bovine tuberculosis (bTB) caused by Mycobacterium bovis and closely related members of the Mycobacterium tuberculosis complex in south-central Spain. The vaccination of wildlife with BCG offers an alternative to culling and to movement restriction for the control of bTB among wildlife reservoirs. In this study, we hypothesized that oral BCG immunization of wild boar would affect the expression of immunoregulatory genes and confer protection against M. bovis. Three groups were used to describe the infection, pathological findings and gene expression profiles in wild boar: BCG-vaccinated and M. bovis-challenged (vaccinated challenged group; N=6), non-vaccinated and M. bovis-challenged (non-vaccinated challenged group; N=4), and non-vaccinated and mock-infected (control group; N=2) animals. M. bovis was isolated from 50% (3/6) and 75% (3/4) of vaccinated challenged and non-vaccinated challenged animals, respectively. All four wild boar from the non-vaccinated challenged group developed bTB-compatible lesions 114 days after challenge. In contrast, only 50% of vaccinated challenged wild boar developed lesions. The PBMC mRNA levels of IL4, RANTES, C3, IFN-gamma and methylmalonyl-CoA mutase (MUT) were analyzed at several days post-vaccination (dpi). When vaccinated challenged animals were compared to controls, all five genes were significantly upregulated at the time of M. bovis infection at 186dpi but IFN-gamma levels were also upregulated at 11 and 46dpi. The C3 and MUT mRNA levels were higher at 46dpi, and 11 and 186dpi, respectively, in vaccinated protected wild boar when compared to non-vaccinated challenged animals. At the end of the experiment (300dpi), the mRNA levels of selected genes were lower in non-vaccinated challenged animals when compared to control wild boar. Exposing wild boar to a dose of 10(4)cfu of M. bovis by the oropharyngeal route is an adequate protocol to produce an infection model in this species. Our results suggested that oral BCG immunization of wild boar results in the upregulation of immunoregulatory genes that may be associated with protective response to M. bovis infection in this species. More studies on vaccine efficacy, delivery, and safety will be needed to confirm if oral vaccination with BCG could be used in bTB control programs for reducing M. bovis infection and clinical disease in wild boar.
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Affiliation(s)
- C Ballesteros
- Instituto de Investigación en Recursos Cinegéticos IREC, Ronda de Toledo s.n., 13071 Ciudad Real, Spain
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9
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Reina R, Mora MI, Glaria I, García I, Solano C, Luján L, Badiola JJ, Contreras A, Berriatua E, Juste R, Mamoun RZ, Rolland M, Amorena B, de Andrés D. Molecular characterization and phylogenetic study of Maedi Visna and Caprine Arthritis Encephalitis viral sequences in sheep and goats from Spain. Virus Res 2006; 121:189-98. [PMID: 16870297 DOI: 10.1016/j.virusres.2006.05.011] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.8] [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: 06/09/2005] [Revised: 05/19/2006] [Accepted: 05/24/2006] [Indexed: 11/24/2022]
Abstract
Small ruminant lentiviruses (SRLV) are widely spread in many countries, including Spain. However, little is known about the genetic characteristics of Spanish goat and sheep SRLV. In this study, segments from three genomic regions (pol, gag-p25 and LTR) were amplified using DNA isolated from three Spanish autochthonous sheep (one) and goats (two). Animals (one per flock) belonged to distantly located, single-species flocks (goat or sheep). Sequence analysis showed conservation of regions that are putatively relevant to viral survival. Sequences of Spanish goat and sheep SRLV were allocated into phylogenetic trees (phylograms) with known SRLV groups. The phylograms corresponding to the pol, gag-p25 and LTR regions analyzed presented a compatible topology. This showed that Spanish caprine and ovine SRLV sequences belonged to the A or D phylogenetic groups and were closer to sheep SRLV prototypes (A1 group) than to goat SRLV prototypes (B or C groups), according to the current classification [Shah, C., Boni, J., Huder, J.B., Vogt, H.R., Muhlherr, J., Zanoni, R., Miserez, R., Lutz, H., Schupbach, J., 2004a. Phylogenetic analysis and reclassification of caprine and ovine lentiviruses based on 104 new isolates: evidence for regular sheep-to-goat transmission and worldwide propagation through livestock trade. Virology 319 (1), 12-26]. It was not possible to amplify in the three genetic regions the expected fragment in additional Spanish caprine and ovine SRLV proviral DNA sequences with the PCR primers used. This suggests that there is heterogeneity at the primer binding site among Spanish SRLV sequences. It also illustrates the need to develop diagnostic tests that are sensitive in local breeds.
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Affiliation(s)
- R Reina
- Institute of Agrobiotechnology, CSIC-UPNA, Ctra Mutilva Baja s/n, 31192 Mutilva Baja, Spain
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Theaker C, Juste R, Lucas N, Tallboys C, Azadian B, Soni N. Comparison of bacterial colonization rates of antiseptic impregnated and pure polymer central venous catheters in the critically ill. J Hosp Infect 2002; 52:310-2. [PMID: 12473479 DOI: 10.1053/jhin.2002.1310] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [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: 11/11/2022]
Abstract
A study was performed on critically ill patients to evaluate the rate of colonization and catheter-related sepsis using antiseptic bonded (Arrowguard Arrow International) versus smooth pure polymer (Infectguard MedexMedical Ltd) central venous catheters. Two hundred and thirty-two catheters were inserted into 181 patients. Indications for removal included local or systemic infection, the catheter was no longer required and patient death. No statistical difference in colonization rate was found between the two types of catheter.
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Affiliation(s)
- C Theaker
- Intensive Care Unit, Chelsea and Westminster Hospital, 369 Fulham Road, London SW10 9NH, UK.
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11
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Berriatua E, Ziluaga I, Miguel-Virto C, Uribarren P, Juste R, Laevens S, Vandamme P, Govan JR. Outbreak of subclinical mastitis in a flock of dairy sheep associated with Burkholderia cepacia complex infection. J Clin Microbiol 2001; 39:990-4. [PMID: 11230416 PMCID: PMC87862 DOI: 10.1128/jcm.39.3.990-994.2001] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
An outbreak of subclinical mastitis in a flock of 620 milking sheep was investigated. Microbiological and epidemiological analyses identified the causative agent as belonging to the Burkholderia cepacia complex (formerly Pseudomonas cepacia). Every ewe in the milking flock was individually tested for subclinical mastitis on two separate occasions, 6 weeks apart, by the California (rapid) mastitis test (CMT). The proportion of CMT-positive ewes was 69 of 393 (17.6%) on the first sampling and 27 of 490 (5.5%) on the second sampling. Pure B. cepacia cultures identified with the API 20 NE system were grown from 64 of 96 (66.7%) CMT-positive ewes and from 1 of 33 (3.0%) CMT-negative ewes. Statistical analysis confirmed the significant association between a positive CMT result and a positive culture result for B. cepacia complex. Additional polyphasic taxonomic analyses of eight isolates showed that seven belonged to B. cepacia genomovar III; the remaining isolate was identified as Burkholderia vietnamiensis (formerly B. cepacia genomovar V). Bacteriological investigation of samples from milking equipment and other environmental sites failed to identify "B. cepacia" in any of the samples taken. To our knowledge, this is the first report of an outbreak of natural infection in animals caused by B. cepacia complex and the first description of B. cepacia complex infection in sheep.
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Affiliation(s)
- E Berriatua
- Sanidad Animal, Instituto Vasco de Investigación y Desarrollo Agrario (NEIKER), 48160 Derio, Bizkaia, Spain.
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