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Bulun H, Bridger PS, Schillinger S, Akineden Ö, Barth SA, Fischer M, Henrich M, Seeger T, Doll K, Bülte M, Bauerfeind R, Menge C. Interferon-gamma producing CD4 + T cells quantified by flow cytometry as early markers for Mycobacterium avium ssp. paratuberculosis infection in cattle. Vet Res 2024; 55:69. [PMID: 38822400 PMCID: PMC11143577 DOI: 10.1186/s13567-024-01324-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Accepted: 04/05/2024] [Indexed: 06/03/2024] Open
Abstract
Current diagnostic methods for Johne's disease in cattle allow reliable detection of infections with Mycobacterium avium ssp. paratuberculosis (MAP) not before animals are 2 years of age. Applying a flow cytometry-based approach (FCA) to quantify a MAP-specific interferon-gamma (IFN-γ) response in T cell subsets, the present study sought to monitor the kinetics of the cell-mediated immune response in experimentally infected calves. Six MAP-negative calves and six calves, orally inoculated with MAP at 10 days of age, were sampled every 4 weeks for 52 weeks post-inoculation (wpi). Peripheral blood mononuclear cells (PBMC) were stimulated with either purified protein derivatives (PPD) or whole cell sonicates derived from MAP (WCSj), M. avium ssp. avium or M. phlei for 6 days followed by labeling of intracellular IFN-γ in CD4+ and CD8+ T cells. No antigen-specific IFN-γ production was detectable in CD8+ cells throughout and the responses of CD4+ cells of MAP-infected and control calves were similar up to 12 wpi. However, the mean fluorescence intensity (MFI) for the detection of IFN-γ in CD4+ cells after WCSj antigen stimulation allowed for a differentiation of animal groups from 16 wpi onwards. This approach had a superior sensitivity (87.8%) and specificity (86.8%) to detect infected animals from 16 wpi onwards, i.e., in an early infection stage, as compared to the IFN-γ release assay (IGRA). Quantification of specific IFN-γ production at the level of individual CD4+ cells may serve, therefore, as a valuable tool to identify MAP-infected juvenile cattle.
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Affiliation(s)
- Hakan Bulun
- Institute for Hygiene & Infectious Diseases of Animals, Justus Liebig University Giessen, Giessen, Germany
| | - Philip S Bridger
- Institute for Hygiene & Infectious Diseases of Animals, Justus Liebig University Giessen, Giessen, Germany
| | - Simone Schillinger
- Institute for Hygiene & Infectious Diseases of Animals, Justus Liebig University Giessen, Giessen, Germany
| | - Ömer Akineden
- Institute for Veterinary Food Sciences, Justus Liebig University Giessen, Giessen, Germany
| | - Stefanie A Barth
- Institute for Hygiene & Infectious Diseases of Animals, Justus Liebig University Giessen, Giessen, Germany
- Friedrich-Loeffler-Institut, Institute of Molecular Pathogenesis, Jena, Germany
| | - Marta Fischer
- Institute for Veterinary Food Sciences, Justus Liebig University Giessen, Giessen, Germany
| | - Manfred Henrich
- Department for Veterinary Pathology, Justus Liebig University Giessen, Giessen, Germany
| | - Torsten Seeger
- Clinic for Ruminants & Swine, University of Giessen, Giessen, Germany
| | - Klaus Doll
- Clinic for Ruminants & Swine, University of Giessen, Giessen, Germany
| | - Michael Bülte
- Institute for Veterinary Food Sciences, Justus Liebig University Giessen, Giessen, Germany
| | - Rolf Bauerfeind
- Institute for Hygiene & Infectious Diseases of Animals, Justus Liebig University Giessen, Giessen, Germany
| | - Christian Menge
- Institute for Hygiene & Infectious Diseases of Animals, Justus Liebig University Giessen, Giessen, Germany.
- Friedrich-Loeffler-Institut, Institute of Molecular Pathogenesis, Jena, Germany.
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Suwankitwat N, Bhakha K, Molee L, Songkasupa T, Puangjinda K, Chamchoy T, Arjkumpa O, Nuansrichay B, Srisomrun S, Pongphitcha P, Lekcharoensuk P, Arunvipas P. Long-term monitoring of immune response to recombinant lumpy skin disease virus in dairy cattle from small-household farms in western Thailand. Comp Immunol Microbiol Infect Dis 2023; 99:102008. [PMID: 37467568 DOI: 10.1016/j.cimid.2023.102008] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 06/13/2023] [Accepted: 06/19/2023] [Indexed: 07/21/2023]
Abstract
Lumpy skin disease (LSD) was firstly reported in Thailand in 2021 which affected the cattle industry. However, there is limited information on the immune response of LSDV infection in Thailand where recombinant vaccine strain circulated. The aim of this research was to study the duration of LSD immune response of subclinical and clinical animals after natural infection in dairy cattle. Sixty-six dairy cattle from ten farms in central and western regions of Thailand were investigated. Antibody was detected by virus neutralization test and ELISA. Cell mediated immunity (CMI)-related cytokine gene expressions were evaluated. Antibody was detected until at least 15 months after the noticeable symptom. Cattle with subclinical disease had lower antibody levels compared to animals which had clinical disease. IFN-γ and TNF-α levels were increased, while IL-10 level was decreased in the infected animals compared to the controls. This study elucidated immune responses in dairy cattle herd affected by recombinant LSDV.
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Affiliation(s)
- Nutthakarn Suwankitwat
- Department of Microbiology and Immunology, Faculty of Veterinary Medicine, Bangkhen campus, Kasetsart University, Bangkok 10900, Thailand; Virology section, National Institute of Animal Health, Department of Livestock Development, Bangkok 10900, Thailand.
| | - Kultyarat Bhakha
- Virology section, National Institute of Animal Health, Department of Livestock Development, Bangkok 10900, Thailand.
| | - Lamul Molee
- Virology section, National Institute of Animal Health, Department of Livestock Development, Bangkok 10900, Thailand.
| | - Tapanut Songkasupa
- Virology section, National Institute of Animal Health, Department of Livestock Development, Bangkok 10900, Thailand.
| | - Kanokwan Puangjinda
- Virology section, National Institute of Animal Health, Department of Livestock Development, Bangkok 10900, Thailand.
| | - Tapakorn Chamchoy
- Epidemiology section, National Institute of Animal Health, Department of Livestock Development, Bangkok 10900, Thailand.
| | - Orapun Arjkumpa
- The 4th Regional Livestock Office, Department of Livestock Development, Khon Kaen 40260, Thailand.
| | - Bandit Nuansrichay
- Virology section, National Institute of Animal Health, Department of Livestock Development, Bangkok 10900, Thailand.
| | - Smit Srisomrun
- Bovine Unit, Veterinary Teaching Hospital, Faculty of Veterinary Medicine, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom 73140, Thailand.
| | - Phitcha Pongphitcha
- Bovine Unit, Veterinary Teaching Hospital, Faculty of Veterinary Medicine, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom 73140, Thailand.
| | - Porntippa Lekcharoensuk
- Department of Microbiology and Immunology, Faculty of Veterinary Medicine, Bangkhen campus, Kasetsart University, Bangkok 10900, Thailand.
| | - Pipat Arunvipas
- Department of Large Animal and Wildlife Clinical Sciences, Faculty of Veterinary Medicine, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom 73140, Thailand.
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Kotimoole C, Antil N, Kasaragod S, Behera S, Arvind A, Reiling N, Flo T, Prasad T. Development of a spectral library for the discovery of altered genomic events in Mycobacterium avium associated with virulence using mass spectrometry-based proteogenomic analysis. Mol Cell Proteomics 2023; 22:100533. [PMID: 36948415 PMCID: PMC10149365 DOI: 10.1016/j.mcpro.2023.100533] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 02/02/2023] [Accepted: 03/16/2023] [Indexed: 03/24/2023] Open
Abstract
Mycobacterium avium is one of the prominent disease-causing bacteria in humans. It causes lymphadenitis, chronic and extrapulmonary, and disseminated infections in adults, children, and immunocompromised patients. M. avium has ∼4,500 predicted protein-coding regions on average, which can help discover several variants at the proteome level. Many of them are potentially associated with virulence; thus, identifying such proteins can be a helpful feature in developing panel-based theranostics. In line with such a long-term goal, we carried out an in-depth proteomic analysis of M. avium with both data-dependent and data-independent acquisition methods. Further, a set of proteogenomic investigations were carried out using i) a protein database for Mycobacterium tuberculosis, ii) a M. avium genome six-frame translated database, and iii) a variant protein database of M. avium. A search of mass spectrometry data against M. avium protein database resulted in identifying 2,954 proteins. Further, proteogenomic analyses aided in identifying 1,301 novel peptide sequences and correcting translation start sites for 15 proteins. Ultimately, we created a spectral library of M. avium proteins, including novel genome search-specific peptides and variant peptides detected in this study. We validated the spectral library by a data-independent acquisition of the M. avium proteome. Thus, we present an M. avium spectral library of 29,033 peptide precursors supported by 0.4 million fragment ions for further use by the biomedical community.
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Affiliation(s)
- ChinmayaNarayana Kotimoole
- Center for Systems Biology and Molecular Medicine, Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore, 575018, India
| | - Neelam Antil
- Institute of Bioinformatics, International Technology Park, Bangalore, India
| | - Sandeep Kasaragod
- Center for Systems Biology and Molecular Medicine, Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore, 575018, India
| | - SantoshKumar Behera
- Center for Systems Biology and Molecular Medicine, Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore, 575018, India
| | - Anjana Arvind
- Center for Systems Biology and Molecular Medicine, Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore, 575018, India
| | - Norbert Reiling
- Microbial Interface Biology, Research Center Borstel, Leibniz Lung Center, Parkallee 22, D-23845 Borstel, Germany; German Center for Infection Research (DZIF), Site Hamburg-Lübeck-Borstel-Riems, 23845 Borstel, Germany
| | - TrudeHelen Flo
- Centre of Molecular Inflammation Research, Department of Clinical and Molecular Medicine Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, Kunnskapssenteret, 424.04.035, Øya, Norway
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Barsi F, Dalzini E, Russo S, Cosciani-Cunico E, Monastero P, Arrigoni N, Garbarino CA, Cortimiglia C, Losio MN, Ricchi M. Isothermal inactivation of Mycobacterium avium subsp. paratuberculosis in curd simulating the stretching phase in pasta-filata cheese process. Front Microbiol 2022; 13:1052222. [PMID: 36532449 PMCID: PMC9751633 DOI: 10.3389/fmicb.2022.1052222] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Accepted: 11/08/2022] [Indexed: 09/11/2024] Open
Abstract
Raw milk and dairy products are usually considered the major sources of Mycobacterium avium subsp. paratuberculosis (MAP) exposure for humans. During the production process of mozzarella cheese, as well as of other pasta-filata cheeses made with pasteurized or raw milk, curd is heated and stretched by addition of hot or boiling water. This step is the critical point for the inactivation of MAP during the production process, but, to our knowledge, no studies have been published about the thermal death time values of MAP in curd. The aim of this study was to determine the inactivation kinetics of MAP in curd used to produce pasta-filata cheese in six independent experiments. The milk was inoculated with a mix of MAP strains (field and registered strains) and, with the aim to simulate the thermal treatment of the curd during the stretching step, samples of 10 g of contaminated curd were vacuum packed and treated separately at six different temperatures from 60°C to 75°C in a water bath. MAP survival was then evaluated by plate count method and inactivation parameters were estimated for determining the thermal resistance of the pathogen directly in the curd. D-values increased from 0.15 min (D75-value) to 4.22 min (D60-value) and the calculated z-value was 10.2°C. These data aid: (i) to design food thermal process treatments defining acceptance limits of critical control points to ensure safety against MAP; (ii) to predict the time/temperature combinations needed to obtain a certain MAP log reduction during the curd stretching step; (iii) to optimize or validate pasta-filata cheese process.
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Affiliation(s)
- Filippo Barsi
- National Reference Centre and WOAH Reference Laboratory for Paratuberculosis, Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna “Bruno Ubertini”, Piacenza, Italy
| | - Elena Dalzini
- National Reference Centre for Emerging Risks in Food Safety, Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna “Bruno Ubertini”, Milan, Italy
- Food Control Division, Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna “Bruno Ubertini”, Brescia, Italy
| | - Simone Russo
- National Reference Centre and WOAH Reference Laboratory for Paratuberculosis, Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna “Bruno Ubertini”, Piacenza, Italy
| | - Elena Cosciani-Cunico
- National Reference Centre for Emerging Risks in Food Safety, Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna “Bruno Ubertini”, Milan, Italy
- Food Control Division, Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna “Bruno Ubertini”, Brescia, Italy
| | - Paola Monastero
- National Reference Centre for Emerging Risks in Food Safety, Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna “Bruno Ubertini”, Milan, Italy
| | - Norma Arrigoni
- National Reference Centre and WOAH Reference Laboratory for Paratuberculosis, Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna “Bruno Ubertini”, Piacenza, Italy
| | - Chiara Anna Garbarino
- National Reference Centre and WOAH Reference Laboratory for Paratuberculosis, Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna “Bruno Ubertini”, Piacenza, Italy
| | - Claudia Cortimiglia
- National Reference Centre and WOAH Reference Laboratory for Paratuberculosis, Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna “Bruno Ubertini”, Piacenza, Italy
| | - Marina Nadia Losio
- National Reference Centre for Emerging Risks in Food Safety, Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna “Bruno Ubertini”, Milan, Italy
- Food Control Division, Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna “Bruno Ubertini”, Brescia, Italy
| | - Matteo Ricchi
- National Reference Centre and WOAH Reference Laboratory for Paratuberculosis, Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna “Bruno Ubertini”, Piacenza, Italy
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5
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Cechova M, Beinhauerova M, Babak V, Kralik P. A viability assay combining palladium compound treatment with quantitative PCR to detect viable Mycobacterium avium subsp. paratuberculosis cells. Sci Rep 2022; 12:4769. [PMID: 35306522 PMCID: PMC8934341 DOI: 10.1038/s41598-022-08634-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Accepted: 03/10/2022] [Indexed: 11/16/2022] Open
Abstract
Mycobacterium avium subsp. paratuberculosis (MAP) is a pathogenic bacterium causing the paratuberculosis, chronic and infectious disease common particularly in wild and domestic ruminants. Currently, culture techniques to detect viable MAP are still used most commonly, although these require a long incubation period. Consequently, a faster molecular method for assessing MAP cell viability based on cell membrane integrity was introduced consisting of sample treatment with the intercalation dye propidium monoazide (PMA) followed by quantitative PCR (qPCR). However, the PMA-qPCR assay is complicated by demanding procedures involving work in a darkroom and on ice. In this study, we therefore optimized a viability assay combining sample treatment with palladium (Pd) compounds as an alternative viability marker to PMA, which does not require such laborious procedures, with subsequent qPCR. The optimized Pd-qPCR conditions consisting of 90 min exposure to 30 µM bis(benzonitrile)dichloropalladium(II) or 30 µM palladium(II)acetate at 5 °C and using ultrapure water as a resuspension medium resulted in differences in quantification cycle (Cq) values between treated live and dead MAP cells of 8.5 and 7.9, respectively, corresponding to approximately 2.5 log units. In addition, Pd-qPCR proved to be superior to PMA-qPCR in distinguishing between live and dead MAP cells. The Pd-qPCR viability assay thus has the potential to replace time-consuming culture methods and demanding PMA-qPCR in the detection and quantification of viable MAP cells with possible application in food, feed, clinical and environmental samples.
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Umanets A, Dinkla A, Vastenhouw S, Ravesloot L, Koets AP. Classification and prediction of Mycobacterium Avium subsp. Paratuberculosis (MAP) shedding severity in cattle based on young stock heifer faecal microbiota composition using random forest algorithms. Anim Microbiome 2021; 3:78. [PMID: 34776001 PMCID: PMC8591832 DOI: 10.1186/s42523-021-00143-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 10/31/2021] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND Bovine paratuberculosis is a devastating infectious disease caused by Mycobacterium avium subsp. paratuberculosis (MAP). The development of the paratuberculosis in cattle can take up to a few years and vastly differs between individuals in severity of the clinical symptoms and shedding of the pathogen. Timely identification of high shedding animals is essential for paratuberculosis control and minimization of economic losses. Widely used methods for detection and quantification of MAP, such as culturing and PCR based techniques rely on direct presence of the pathogen in a sample and have little to no predictive value concerning the disease development. In the current study, we investigated the possibility of predicting MAP shedding severity in cattle based on the faecal microbiota composition. Twenty calves were experimentally infected with MAP and faecal samples were collected biweekly up to four years of age. All collected samples were subjected to culturing on selective media to obtain data about shedding severity. Faecal microbiota was profiled in a subset of samples (n = 264). Using faecal microbiota composition and shedding intensity data a random forest classifier was built for prediction of the shedding status of the individual animals. RESULTS The results indicate that machine learning approaches applied to microbial composition can be used to classify cows into groups by severity of MAP shedding. The classification accuracy correlates with the age of the animals and use of samples from older individuals resulted in a higher classification precision. The classification model based on samples from the first 12 months of life showed an AUC between 0.78 and 0.79 (95% CI), while the model based on samples from animals older than 24 months showed an AUC between 0.91 and 0.92 (95% CI). Prediction for samples from animals between 12 and 24 month of age showed intermediate accuracy [AUC between 0.86 and 0.87 (95% CI)]. In addition, the results indicate that a limited number of microbial taxa were important for classification and could be considered as biomarkers. CONCLUSIONS The study provides evidence for the link between microbiota composition and severity of MAP infection and shedding, as well as lays ground for the development of predictive diagnostic tools based on the faecal microbiota composition.
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Affiliation(s)
- Alexander Umanets
- Department of Bacteriology, Host Pathogen Interaction and Diagnostics Development, Wageningen Bioveterinary Research, Lelystad, The Netherlands
- Present Address: Chair Group Youth Food and Health, Faculty of Science and Engineering, Maastricht University Campus Venlo, Venlo, The Netherlands
| | - Annemieke Dinkla
- Department of Bacteriology, Host Pathogen Interaction and Diagnostics Development, Wageningen Bioveterinary Research, Lelystad, The Netherlands
| | - Stephanie Vastenhouw
- Department of Bacteriology, Host Pathogen Interaction and Diagnostics Development, Wageningen Bioveterinary Research, Lelystad, The Netherlands
| | - Lars Ravesloot
- Department of Bacteriology, Host Pathogen Interaction and Diagnostics Development, Wageningen Bioveterinary Research, Lelystad, The Netherlands
| | - Ad P. Koets
- Department of Bacteriology, Host Pathogen Interaction and Diagnostics Development, Wageningen Bioveterinary Research, Lelystad, The Netherlands
- Department of Population Health Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
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Using Omics Approaches in the Discovery of Biomarkers for Early Diagnosis of Johne's Disease in Sheep and Goats. Animals (Basel) 2021; 11:ani11071912. [PMID: 34199073 PMCID: PMC8300312 DOI: 10.3390/ani11071912] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 06/18/2021] [Accepted: 06/23/2021] [Indexed: 12/16/2022] Open
Abstract
Simple Summary Johne’s disease (JD) is caused by Mycobacterium avium subsp. paratuberculosis (MAP) and is an important and emerging problem in livestock. Most JD research has been carried out on cattle, but interest in the pathogenesis and diagnosis of this disease in sheep and goats is greatest in developing countries. Sheep and goats are also a relevant part of livestock production in Europe and Australia, and these species provide an excellent resource to study and better understand the mechanism of survival of MAP and gain insights into possible approaches to control this disease. This review gives an overview of the literature on paratuberculosis in sheep and goats, highlighting the immunological aspects and the potential for “omics” approaches to identify effective biomarkers for the early detection of infection. Abstract Johne’s disease (JD) is caused by Mycobacterium avium subsp. paratuberculosis (MAP) and is an important and emerging problem in livestock; therefore, its control and prevention is a priority to reduce economic losses and health risks. Most JD research has been carried out on cattle, but interest in the pathogenesis and diagnosis of this disease in sheep and goats is greatest in developing countries. Sheep and goats are also a relevant part of livestock production in Europe and Australia, and these species provide an excellent resource to study and better understand the mechanism of survival of MAP and gain insights into possible approaches to control this disease. This review gives an overview of the literature on paratuberculosis in sheep and goats, highlighting the immunological aspects and the potential for “omics” approaches to identify effective biomarkers for the early detection of infection. As JD has a long incubation period before the disease becomes evident, early diagnosis is important to control the spread of the disease.
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Roller M, Hansen S, Knauf-Witzens T, Oelemann WMR, Czerny CP, Abd El Wahed A, Goethe R. Mycobacterium avium Subspecies paratuberculosis Infection in Zoo Animals: A Review of Susceptibility and Disease Process. Front Vet Sci 2020; 7:572724. [PMID: 33426014 PMCID: PMC7785982 DOI: 10.3389/fvets.2020.572724] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Accepted: 11/30/2020] [Indexed: 12/14/2022] Open
Abstract
Mycobacterium avium subspecies paratuberculosis (MAP) is the causative agent of paratuberculosis (ParaTB or Johne's disease), a contagious, chronic and typically fatal enteric disease of domestic and non-domestic ruminants. Clinically affected animals present wasting and emaciation. However, MAP can also infect non-ruminant animal species with less specific signs. Zoological gardens harbor various populations of diverse animal species, which are managed on limited space at higher than natural densities. Hence, they are predisposed to endemic trans-species pathogen distribution. Information about the incidence and prevalence of MAP infections in zoological gardens and the resulting potential threat to exotic and endangered species are rare. Due to unclear pathogenesis, chronicity of disease as well as the unknown cross-species accuracy of diagnostic tests, diagnosis and surveillance of MAP and ParaTB is challenging. Differentiation between uninfected shedders of ingested bacteria; subclinically infected individuals; and preclinically diseased animals, which may subsequently develop clinical signs after long incubation periods, is crucial for the interpretation of positive test results in animals and the resulting consequences in their management. This review summarizes published data from the current literature on occurrence of MAP infection and disease in susceptible and affected zoo animal species as well as the applied diagnostic methods and measures. Clinical signs indicative for ParaTB, pathological findings and reports on detection, transmission and epidemiology in zoo animals are included. Furthermore, case reports were re-evaluated for incorporation into accepted consistent terminologies and case definitions.
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Affiliation(s)
- Marco Roller
- Zoological-Botanical Gardens Wilhelma, Stuttgart, Germany
- Department of Animal Sciences, Faculty of Agricultural Science, Institute of Veterinary Medicine, Division of Microbiology and Animal Hygiene, Georg-August-University Göttingen, Göttingen, Germany
- Institute for Microbiology, University of Veterinary Medicine Hannover Foundation, Hannover, Germany
| | - Sören Hansen
- Department of Animal Sciences, Faculty of Agricultural Science, Institute of Veterinary Medicine, Division of Microbiology and Animal Hygiene, Georg-August-University Göttingen, Göttingen, Germany
| | | | - Walter M. R. Oelemann
- Institute for Microbiology, University of Veterinary Medicine Hannover Foundation, Hannover, Germany
- Department of Immunology, Institute of Microbiology, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Claus-Peter Czerny
- Department of Animal Sciences, Faculty of Agricultural Science, Institute of Veterinary Medicine, Division of Microbiology and Animal Hygiene, Georg-August-University Göttingen, Göttingen, Germany
| | - Ahmed Abd El Wahed
- Department of Animal Sciences, Faculty of Agricultural Science, Institute of Veterinary Medicine, Division of Microbiology and Animal Hygiene, Georg-August-University Göttingen, Göttingen, Germany
| | - Ralph Goethe
- Institute for Microbiology, University of Veterinary Medicine Hannover Foundation, Hannover, Germany
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9
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Ceres KM, Schukken YH, Gröhn YT. Characterizing infectious disease progression through discrete states using hidden Markov models. PLoS One 2020; 15:e0242683. [PMID: 33216809 PMCID: PMC7678993 DOI: 10.1371/journal.pone.0242683] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2019] [Accepted: 11/08/2020] [Indexed: 11/18/2022] Open
Abstract
Infectious disease management relies on accurate characterization of disease progression so that transmission can be prevented. Slowly progressing infectious diseases can be difficult to characterize because of a latency period between the time an individual is infected and when they show clinical signs of disease. The introduction of Mycobacterium avium ssp. paratuberculosis (MAP), the cause of Johne’s disease, onto a dairy farm could be undetected by farmers for years before any animal shows clinical signs of disease. In this time period infected animals may shed thousands of colony forming units. Parameterizing trajectories through disease states from infection to clinical disease can help farmers to develop control programs based on targeting individual disease state, potentially reducing both transmission and production losses due to disease. We suspect that there are two distinct progression pathways; one where animals progress to a high-shedding disease state, and another where animals maintain a low-level of shedding without clinical disease. We fit continuous-time hidden Markov models to multi-year longitudinal fecal sampling data from three US dairy farms, and estimated model parameters using a modified Baum-Welch expectation maximization algorithm. Using posterior decoding, we observed two distinct shedding patterns: cows that had observations associated with a high-shedding disease state, and cows that did not. This model framework can be employed prospectively to determine which cows are likely to progress to clinical disease and may be applied to characterize disease progression of other slowly progressing infectious diseases.
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Affiliation(s)
- Kristina M. Ceres
- Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY, United States of America
- * E-mail:
| | - Ynte H. Schukken
- Department of Animal Sciences, Wageningen University, Wageningen, The Netherlands
| | - Yrjö T. Gröhn
- Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY, United States of America
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From six to zero per cent Mycobacterium avium subsp. paratuberculosis milk ELISA positivity in three years - probably induced by Mycobacterium vaccae. J DAIRY RES 2020; 87:204-207. [PMID: 32308162 DOI: 10.1017/s0022029920000278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
This research communication reports the results of a study aimed at investigating the effects of introducing Mycobacterium vaccae on paratuberculosis carriage in a dairy herd. M. vaccae is a non-pathogenic member of the Mycobacteriaceae, with immunomodulatory and immunotherapeutic capabilities, acting by stimulating the cellular immune system, important in protection against paratuberculosis. Starting in 2014 we administered, by gavage, 1010 live M. vaccae bacteria to all new-born heifers on a dairy farm, first within 24 h of birth and again 2 weeks later. Paratuberculosis carriage was monitored yearly by milk ELISA. Faecal samples of 50% of cows, aged 3 years, born 1, 2 or 3 years before the experiment's onset, were tested by qPCR for MAP shedding and compared to 100% treated cows of the same age. Within 3 years, milk ELISA positivity was reduced from 6 to 0% and remained unchanged for the subsequent 2 years. One qPCR positive control cow was found each year for a total of 3 animals (2.46%). One positive cow (1%) was found among the treated cows. Two of the 3 positive control animals, still present on the farm at the end of 2019, tested negative whereas the positive test cow continued shedding MAP. M. vaccae shedding heifers mixing with adult cows were the probable means of the microorganism's propagation. The results of this investigation indicate that the introduction of live M. vaccae may be an inexpensive and fast alternative to current paratuberculosis control practices, justifying further exploration of the topic.
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Characteristics and Epidemiological Investigation of Paratuberculosis in Dairy Cattle in Tai'an, China. BIOMED RESEARCH INTERNATIONAL 2020; 2020:3896754. [PMID: 32258119 PMCID: PMC7094201 DOI: 10.1155/2020/3896754] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 02/20/2020] [Accepted: 02/29/2020] [Indexed: 11/17/2022]
Abstract
Paratuberculosis, a chronic and sometimes fatal disease of ruminants, is caused by Mycobacterium avium subsp. paratuberculosis (MAP). In this study, we examined paratuberculosis cases among 2-4-year-old dairy cows at farms in Shandong Province, China. Paratuberculosis cases were diagnosed based on clinical symptoms, pathological autopsy, and histopathological inspection. Characteristics of paratuberculosis in the affected dairy cattle included poor body condition, persistent diarrhea, subcutaneous edema, granulomatous ileitis (multibacillary), mesenteric lymphadenitis, and hepatitis. Acid-fast bacilli from fecal specimens and lymphocytes were putatively identified as MAP based on Ziehl-Neelsen staining, then confirmed using polymerase chain reaction-based testing and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry analyses. Overall, only one MAP strain was isolated from a herd with symptomatic diarrhea. However, analysis of 586 serum samples from nine herds in Tai'an City revealed that 66.7% of herds and 14.2% of animals were seropositive for MAP. Our findings suggest that paratuberculosis is widely prevalent and therefore a significant threat to the dairy industry in Tai'an City, Shandong Province, China.
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12
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Li L, Bannantine JP, Campo JJ, Randall A, Grohn YT, Schilling MA, Katani R, Radzio-Basu J, Easterling L, Kapur V. Identification of Sero-Diagnostic Antigens for the Early Diagnosis of Johne's Disease using MAP Protein Microarrays. Sci Rep 2019; 9:17573. [PMID: 31772281 PMCID: PMC6879513 DOI: 10.1038/s41598-019-53973-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Accepted: 11/07/2019] [Indexed: 01/20/2023] Open
Abstract
Considerable effort has been directed toward controlling Johne’s disease (JD), a chronic granulomatous intestinal inflammatory disease caused by Mycobacterium avium subsp. paratuberculosis (MAP) in cattle and other ruminants. However, progress in controlling the spread of MAP infection has been impeded by the lack of reliable diagnostic tests that can identify animals early in the infection process and help break the transmission chain. To identify reliable antigens for early diagnosis of MAP infection, we constructed a MAP protein array with 868 purified recombinant MAP proteins, and screened a total of 180 well-characterized serum samples from cows assigned to 4 groups based on previous serological and fecal test results: negative low exposure (NL, n = 30); negative high exposure (NH, n = 30); fecal-positive, ELISA-negative (F + E−, n = 60); and both fecal- and ELISA-positive (F + E+, n = 60). The analyses identified a total of 49 candidate antigens in the NH, F + E−, and F + E+ with reactivity compared with the NL group (p < 0.01), a majority of which have not been previously identified. While some of the antigens were identified as reactive in only one of the groups, others showed reactivity in multiple groups, including NH (n = 28), F + E− (n = 26), and F + E+ (n = 17) groups. Using combinations of top reactive antigens in each group, the results reveal sensitivities of 60.0%, 73.3%, and 81.7% in the NH, F + E−, and F + E+, respectively at 90% specificity, suggesting that early detection of infection in animals may be possible and enable better opportunities to reduce within herd transmission that may be otherwise missed by traditional serological assays that are biased towards more heavily infected animals. Together, the results suggest that several of the novel candidate antigens identified in this study, particularly those that were reactive in the NH and F + E− groups, have potential utility for the early sero-diagnosis of MAP infection.
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Affiliation(s)
- Lingling Li
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, PA, United States of America.,Huck Institutes of Life Sciences, The Pennsylvania State University, University Park, PA, United States of America
| | - John P Bannantine
- National Animal Disease Center, USDA-ARS, Ames, IA, United States of America
| | - Joseph J Campo
- Antigen Discovery, Inc., Irvine, CA, United States of America
| | - Arlo Randall
- Antigen Discovery, Inc., Irvine, CA, United States of America
| | - Yrjo T Grohn
- Department of Population Medicine and Diagnostic Sciences, Cornell University, Ithaca, NY, United States of America
| | - Megan A Schilling
- Huck Institutes of Life Sciences, The Pennsylvania State University, University Park, PA, United States of America.,Department of Animal Science, Pennsylvania State University, University Park, PA, United States of America
| | - Robab Katani
- Huck Institutes of Life Sciences, The Pennsylvania State University, University Park, PA, United States of America.,Department of Animal Science, Pennsylvania State University, University Park, PA, United States of America.,Applied Biological and Biosafety Research Laboratory, The Pennsylvania State University, University Park, PA, United States of America
| | - Jessica Radzio-Basu
- Huck Institutes of Life Sciences, The Pennsylvania State University, University Park, PA, United States of America.,Applied Biological and Biosafety Research Laboratory, The Pennsylvania State University, University Park, PA, United States of America
| | - Laurel Easterling
- Huck Institutes of Life Sciences, The Pennsylvania State University, University Park, PA, United States of America.,Department of Animal Science, Pennsylvania State University, University Park, PA, United States of America
| | - Vivek Kapur
- Huck Institutes of Life Sciences, The Pennsylvania State University, University Park, PA, United States of America. .,Department of Animal Science, Pennsylvania State University, University Park, PA, United States of America. .,Applied Biological and Biosafety Research Laboratory, The Pennsylvania State University, University Park, PA, United States of America.
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13
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Charlton GL, Bleach ECL, Rutter SM. Cows with paratuberculosis (Johne's disease) alter their lying behavior around peak lactation. J Dairy Sci 2019; 102:11328-11336. [PMID: 31606209 DOI: 10.3168/jds.2019-16854] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Accepted: 08/25/2019] [Indexed: 11/19/2022]
Abstract
Paratuberculosis or Johne's disease (JD) is a fatal chronic enteritis that causes detrimental effects on production and health and significantly reduces the welfare of cattle. Control of JD is highly desirable, but single milk ELISA testing may not be sensitive enough to identify all affected animals, particularly in the early stages of the disease. The objective of this study was to compare the activity of JD-positive (JD5) to JD-negative (JD0) cows from calving until wk 20 of lactation. The study was conducted at Harper Adams University, United Kingdom, using 42 multiparous [3.1 ± 0.22 (mean ± standard error of the mean); range: 2-7 lactations] Holstein Friesian cows, fitted with an IceQube accelerometer (IceRobotics Ltd., Edinburgh, UK) on the back left leg. The sensors recorded data on lying and standing time, steps, and motion index with a granularity of 15 min. In addition, start and stop times for lying bouts, and exact lying bout durations were recorded, which permits calculation of the number of lying bouts. Every 3 mo the cows were milk sampled and subsequently tested for JD using an ELISA. Cows in the infection group JD0 were classed as JD negative and cows in the infection group JD5 were classed as JD positive. Johne's-positive cows [JD5; n = 21 (repeat ELISA positive)] were matched to negative cows [JD0; n = 21 (repeat ELISA negative)] based on lactation number and age. Around peak lactation we found differences in lying behavior. The JD5 cows spend less time lying/d during wk 7 to 11 of lactation. The largest difference observed was around wk 8 of lactation, with JD5 cows spending, on average, 2 h/d less time lying down than JD0 cows (9.3 ± 0.33 vs. 11.3 ± 0.61 h/d, respectively). The JD5 cows also had fewer lying bouts per day from wk 7 to 15 of lactation (excluding wk 13), and during wk 11 and 12 average lying bout duration was longer for JD5 cows compared with JD0 cows. No differences were observed in steps per day, milk yield, BCS, and mobility score between JD5 and JD0 cows from calving to wk 20 of lactation. As far as we are aware, this is the first study to show changes in activity of JD-positive cows. The results show that activity data from leg-mounted accelerometers has the potential to help identify JD-positive cows, although more research is required.
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Affiliation(s)
- Gemma L Charlton
- Animal Production, Welfare and Veterinary Sciences, Harper Adams University, Shropshire, United Kingdom TF10 8NB.
| | - Emma C L Bleach
- Animal Production, Welfare and Veterinary Sciences, Harper Adams University, Shropshire, United Kingdom TF10 8NB
| | - S Mark Rutter
- Animal Production, Welfare and Veterinary Sciences, Harper Adams University, Shropshire, United Kingdom TF10 8NB
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14
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Fechner K, Dreymann N, Schimkowiak S, Czerny CP, Teitzel J. Efficacy of dairy on-farm high-temperature, short-time pasteurization of milk on the viability of Mycobacterium avium ssp. paratuberculosis. J Dairy Sci 2019; 102:11280-11290. [PMID: 31563303 DOI: 10.3168/jds.2019-16590] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Accepted: 08/15/2019] [Indexed: 02/03/2023]
Abstract
Feeding pasteurized milk to suckling calves is a popular practice used increasingly on dairy farms. Waste milk is frequently fed to calves because of its high nutritional value and economic benefits compared to milk replacement products. However, one of the disadvantages of feeding waste milk is the potential for exposure to a high number of bacterial contaminants, which may lead to serious illnesses or infections in calves. One of these contaminants is Mycobacterium avium ssp. paratuberculosis (MAP), the causative agent of Johne's disease (paratuberculosis). The transmission and distribution of paratuberculosis in dairy herds occurs mostly through the feeding newborn calves with contaminated colostrum or milk, because this age group is believed to be most susceptible to infection. To reduce the risk of transmission of pathogens, on-farm pasteurization of milk has become increasingly popular. In this study, we analyzed the efficacy of a new commercial high-temperature, short-time pasteurizer (73.5°C for 20 to 25 s) in terms of MAP inactivation under experimental on-farm conditions. The pasteurizer uses a newly developed steam-heating technique, allowing for the pasteurization of the transition milk without clumping. In 3 independent trials, we spiked fresh raw milk samples to a level of 107 or 104 viable MAP cells/mL before pasteurization. We examined the thermal inactivation and viability of MAP using culture and a D29 bacteriophage-based assay. To verify the identity and number of MAP cells, we also performed PCR assays. Pasteurization of the inoculated milk (107 and 104 MAP cells/mL) resulted in a remarkable reduction in viable MAP cells. The mean inactivation rate of MAP ranged from 0.82 to 2.65 log10 plaque-forming units/mL, depending on the initial MAP amount inoculated and the addition of conservative agents to the pasteurized milk. Nevertheless, approximately 103 MAP cells/mL remained viable and could be transferred to calves after high-temperature, short-time pasteurization of milk.
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Affiliation(s)
- Kim Fechner
- Division of Microbiology and Animal Hygiene, Department of Animal Sciences, Faculty of Agricultural Sciences, University of Göttingen, 37077 Germany
| | - Nico Dreymann
- Division of Microbiology and Animal Hygiene, Department of Animal Sciences, Faculty of Agricultural Sciences, University of Göttingen, 37077 Germany
| | - Sebastian Schimkowiak
- Division of Microbiology and Animal Hygiene, Department of Animal Sciences, Faculty of Agricultural Sciences, University of Göttingen, 37077 Germany
| | - Claus-Peter Czerny
- Division of Microbiology and Animal Hygiene, Department of Animal Sciences, Faculty of Agricultural Sciences, University of Göttingen, 37077 Germany
| | - Jenny Teitzel
- Division of Microbiology and Animal Hygiene, Department of Animal Sciences, Faculty of Agricultural Sciences, University of Göttingen, 37077 Germany.
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15
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Cammi G, Ricchi M, Galiero A, Daminelli P, Cosciani-Cunico E, Dalzini E, Losio M, Savi R, Cerutti G, Garbarino C, Leo S, Arrigoni N. Evaluation of Mycobacterium avium subsp. paratuberculosis survival during the manufacturing process of Italian raw milk hard cheeses (Parmigiano Reggiano and Grana Padano). Int J Food Microbiol 2019; 305:108247. [DOI: 10.1016/j.ijfoodmicro.2019.108247] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Revised: 06/05/2019] [Accepted: 06/06/2019] [Indexed: 01/16/2023]
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16
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Safety and Immunogenicity of a Novel Recombinant Simian Adenovirus ChAdOx2 as a Vectored Vaccine. Vaccines (Basel) 2019; 7:vaccines7020040. [PMID: 31096710 PMCID: PMC6630572 DOI: 10.3390/vaccines7020040] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 04/30/2019] [Accepted: 05/08/2019] [Indexed: 12/16/2022] Open
Abstract
Adenovirus vectored vaccines are a highly effective strategy to induce cellular immune responses which are particularly effective against intracellular pathogens. Recombinant simian adenovirus vectors were developed to circumvent the limitations imposed by the use of human adenoviruses due to widespread seroprevalence of neutralising antibodies. We have constructed a replication deficient simian adenovirus-vectored vaccine (ChAdOx2) expressing 4 genes from the Mycobacterium avium subspecies paratuberculosis (AhpC, Gsd, p12 and mpa). Safety and T-cell immunogenicity results of the first clinical use of the ChAdOx2 vector are presented here. The trial was conducted using a ‘three-plus-three’ dose escalation study design. We demonstrate the vaccine is safe, well tolerated and immunogenic.
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17
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Salem MA, El-Deeb WM, Zaghawa AA, Housawi FM, Alluwaimi AM. Investigation of Mycobacterium paratuberculosis in Arabian dromedary camels ( Camelus dromedarius). Vet World 2019; 12:218-223. [PMID: 31040561 PMCID: PMC6460865 DOI: 10.14202/vetworld.2019.218-223] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2018] [Accepted: 12/20/2018] [Indexed: 11/16/2022] Open
Abstract
Aim: Mycobacterium avium subspecies paratuberculosis (MAP) causes Johne’s disease in ruminants. This study aimed to investigate Mycobacterium paratuberculosis infection in clinically infected camels on the immunological, conventional bacteriological, and molecular biological basis. Materials and Methods: A total of 30 Arabian camels (Camelus dromedarius) were examined in this study. The camels were suffering from signs ranging from mild to severe infections (that did not respond to antibiotic treatment) to chronic or intermittent diarrhea. Camels were grouped into three groups based on their age, sex, and breed. Detection of anti-MAP antibodies in camels’ serum, Ziehl–Neelsen (ZN) staining technique on rectal scraps, direct recognition of MAP in stool and tissue specimens by IS900 polymerase chain reaction (PCR) assay, and finally isolation and molecular description of MAP from fecal and tissue samples were carried out. Results: Five MAP isolates were recovered from these investigated camel samples giving an isolation rate of 16.6%, while eight camels were identified by PCR (26.6%). Five camels yielded MAP in their feces by ZN fecal staining (16.6%), whereas ELISA detected anti-MAP antibodies in nine camels only (30%). Conclusion: From the obtained results, we concluded that the gold standard for the diagnosis of MAP is the culture method despite its limitations. Molecular diagnosis (PCR) could be a useful tool in the identification of truly positive and negative camels; however, great care should be given regarding the primers specificity and sensitivity.
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Affiliation(s)
- Mohamed A Salem
- Veterinary Teaching Hospital, King Faisal University, Al-Hasa, Kingdom of Saudi Arabia.,Department of Medicine and Infectious Diseases, Faculty of Veterinary Medicine, Cairo University, Cairo, Egypt.,Department of Clinical Studies, College of Veterinary Medicine, King Faisal University, Al-Hasa, Kingdom of Saudi Arabia
| | - Wael M El-Deeb
- Department of Clinical Studies, College of Veterinary Medicine, King Faisal University, Al-Hasa, Kingdom of Saudi Arabia.,Department of Veterinary Medicine, Infectious Diseases and Fish Diseases, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
| | - Ahmed A Zaghawa
- Department of Infectious Diseases, Faculty of Veterinary Medicine, Sadat University, -Sadat, Egypt
| | - Fadel M Housawi
- Department of Clinical Studies, College of Veterinary Medicine, King Faisal University, Al-Hasa, Kingdom of Saudi Arabia
| | - Ahmed M Alluwaimi
- Department of Microbiology and Parasitology, College of Veterinary Medicine, King Faisal University, Al-Hasa, Kingdom of Saudi Arabia
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18
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Corbett CS, Naqvi SA, Bauman CA, De Buck J, Orsel K, Uehlinger F, Kelton DF, Barkema HW. Prevalence of Mycobacterium avium ssp. paratuberculosis infections in Canadian dairy herds. J Dairy Sci 2018; 101:11218-11228. [PMID: 30316607 DOI: 10.3168/jds.2018-14854] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Accepted: 08/23/2018] [Indexed: 01/03/2023]
Abstract
Johne's disease is a progressive, chronic disease with inflammation of the small intestine of ruminants caused by Mycobacterium avium ssp. paratuberculosis (MAP). Accurately estimating prevalence of MAP infections is important when controlling spread of infection or monitoring effectiveness of control programs. In the absence of a consistent test method used in prevalence studies across Canada, prevalence estimates among regions and programs cannot be compared. The aim of the current study was to estimate and compare prevalence of MAP infection in Western Canada, Ontario, Québec, and the Atlantic provinces, as well as among varying herd sizes and housing types. On 362 dairy farms located in all 10 provinces of Canada, environmental samples were collected and cultured for detection of MAP. For each herd, 1 sample was collected from the lactating cow area and manure storage. An additional environmental sample was collected from the area where breeding-age heifers were housed. Using prior distributions from previous research, diagnostic sensitivity and specificity were calculated to assess the ability of only 2 environmental samples (manure storage and lactating cow area) to identify MAP-positive farms, resulting in a sensitivity and specificity of 38 and 100%, respectively. We found no difference in sensitivity and specificity when including breeding-age heifers environmental samples. Test characteristics were applied to environmental culture results from the 362 participating farms in all 4 regions, resulting in true prevalence estimates of 66% for farms in Western Canada, 54% in Ontario, 24% in Québec, and 47% in Atlantic Canada. Herds housed in tiestalls had lower prevalence than freestall-housed herds, and herds with 101-150 and >151 cows had higher prevalence than herds with ≤100 cows. This was the first time MAP prevalence was determined using 1 detection method, performed in 1 laboratory, and within a single year across Canada, enabling direct comparisons of prevalence among regions, housing types, and herd sizes.
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Affiliation(s)
- Caroline S Corbett
- Department of Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada, T2N 4N1
| | - S Ali Naqvi
- Department of Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada, T2N 4N1
| | - Cathy A Bauman
- Department of Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada, N1G 2W1
| | - Jeroen De Buck
- Department of Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada, T2N 4N1
| | - Karin Orsel
- Department of Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada, T2N 4N1
| | - Fabienne Uehlinger
- Department of Large Animal Clinical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK, Canada, S7N 5B4
| | - David F Kelton
- Department of Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada, N1G 2W1
| | - Herman W Barkema
- Department of Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada, T2N 4N1.
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19
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Corbett CS, De Buck J, Barkema HW. Effects of freezing on ability to detect Mycobacterium avium subsp. paratuberculosis from bovine tissues following culture. J Vet Diagn Invest 2018; 30:743-746. [PMID: 30029576 DOI: 10.1177/1040638718790781] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Mycobacterium avium subsp. paratuberculosis (MAP) is the bacterium that causes Johne's disease in cattle. Although infected cattle can be identified by examining fecal, blood, or milk samples, the gold standard is identification of MAP in tissue samples postmortem. Although tissue samples are commonly frozen, the ability to detect MAP in frozen-thawed tissue samples has apparently not been reported. We therefore determined the ability to detect MAP in tissue samples following freezing. Tissue samples were collected from calves that were either inoculated (IN) 3 mo prior, or contact-exposed (CE) for 3 mo. Following autopsy, tissues were immediately processed for culture, followed by DNA extraction and detection by qPCR. Samples were categorized as positive or negative based on the cycle threshold (Ct) value. The remaining unprocessed tissue samples were frozen at -80°C. After 18 mo, 50 tissue samples designated MAP-positive were thawed and processed for detection of MAP. Four (8%) samples were qPCR-negative, and Ct values of the remaining 46 samples were higher after freezing. Given the small numerical change in Ct values for MAP-positive samples after 18 mo of frozen storage, freezing and thawing may have had some deleterious effects on MAP detection in tissues. Although the decrease in ability to detect MAP-positive samples was minor for IN calves, there may be a greater effect for CE calves that should be considered when freezing tissue samples.
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Affiliation(s)
- Caroline S Corbett
- Department of Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Jeroen De Buck
- Department of Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Herman W Barkema
- Department of Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada
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20
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Antibiotic Susceptibility and Genotyping of Mycobacterium avium Strains That Cause Pulmonary and Disseminated Infection. Antimicrob Agents Chemother 2018; 62:AAC.02035-17. [PMID: 29378709 DOI: 10.1128/aac.02035-17] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Accepted: 01/20/2018] [Indexed: 11/20/2022] Open
Abstract
Mycobacterium avium subsp. hominissuis mainly causes disseminated infection in immunocompromised hosts, such as individuals with human immunodeficiency virus (HIV) infection, and pulmonary infection in immunocompetent hosts. However, many aspects of the different types of M. avium subsp. hominissuis infection remain unclear. We examined the antibiotic susceptibilities and genotypes of M. avium subsp. hominissuis isolates from different hosts by performing drug susceptibility testing using eight antibiotics (clarithromycin, rifampin, ethambutol, streptomycin, kanamycin, amikacin, ethionamide, and levofloxacin) and variable-number tandem-repeat (VNTR) typing analysis for 46 isolates from the sputa of HIV-negative patients with pulmonary M. avium subsp. hominissuis disease without previous antibiotic treatment and 30 isolates from the blood of HIV-positive patients with disseminated M. avium subsp. hominissuis disease. Interestingly, isolates from pulmonary M. avium subsp. hominissuis disease patients were more resistant to seven of the eight drugs, with the exception being rifampin, than isolates from HIV-positive patients. Moreover, VNTR typing analysis showed that the strains examined in this study were roughly classified into three clusters, and the genetic distance from reference strain 104 for isolates from pulmonary M. avium subsp. hominissuis disease patients was statistically significantly different from that for isolates from HIV-positive patients (P = 0.0018), suggesting that M. avium subsp. hominissuis strains that cause pulmonary and disseminated disease have genetically distinct features. Significant differences in susceptibility to seven of the eight drugs, with the exception being ethambutol, were noted among the three clusters. Collectively, these results suggest that an association between the type of M. avium subsp. hominissuis infection, drug susceptibility, and the VNTR genotype and the properties of M. avium subsp. hominissuis strains associated with the development of pulmonary disease are involved in higher levels of antibiotic resistance.
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21
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Galiero A, Leo S, Garbarino C, Arrigoni N, Russo S, Giacomelli S, Bianchi A, Trevisiol K, Idrizi I, Daka G, Fratini F, Turchi B, Cerri D, Ricchi M. Mycobacterium aviumsubsp. paratuberculosis isolated from wild red deer (Cervus elaphus) in Northern Italy. Vet Microbiol 2018; 217:167-172. [PMID: 29615250 DOI: 10.1016/j.vetmic.2018.03.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 03/15/2018] [Accepted: 03/15/2018] [Indexed: 01/19/2023]
Abstract
Paratuberculosis (or Johne's disease) is an infectious disease which affects mainly ruminants and it is caused by Mycobacterium avium subsp. paratuberculosis (MAP). During a culling program (years 2011-2015) aimed at controlling the red deer (Cervus elaphus) population in Stelvio National Park (Italian Alps), where paratuberculosis was already described in this species, 382 tissue samples from the Lombardy Region and 102 fecal specimens from the Autonomous Province of Bolzano were analyzed by PCR. Of these, 77 samples (20.16%) from the Lombardy area and 19 specimens (18.63%) from the Bolzano area resulted PCR positive. The cultural test was carried out on PCR positive samples (n = 96), enabling the isolation of 19 MAP field strains which were genotyped using MIRU-VNTR typing and Short Sequence repeats (SSRs). Our results suggest that all isolates share an identical VNTR profile corresponding to the INMV1 genotype. The only variation was on the locus SSR2, but the utility of this last locus has already been questioned because of its instability. Overall, these data suggest a common clonal origin and host adaptation during the diffusion of paratuberculosis in this population. Finally, this profile is the same as that which has already been described in the cattle population in Northern Italy, suggesting a possible inter-species disease transmission pattern from wildlife to domestic ruminants and vice versa.
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Affiliation(s)
- Alessia Galiero
- Istituto Zooprofilattico Sperimentale dell'Emilia Romagna e della Lombardia, Sezione di Piacenza-Gariga, Strada della Faggiola 1, 29027, National Reference Centre for Paratuberculosis, Gariga di Podenzano, (PC), Italy.
| | - Simone Leo
- Istituto Zooprofilattico Sperimentale dell'Emilia Romagna e della Lombardia, Sezione di Piacenza-Gariga, Strada della Faggiola 1, 29027, National Reference Centre for Paratuberculosis, Gariga di Podenzano, (PC), Italy
| | - Chiara Garbarino
- Istituto Zooprofilattico Sperimentale dell'Emilia Romagna e della Lombardia, Sezione di Piacenza-Gariga, Strada della Faggiola 1, 29027, National Reference Centre for Paratuberculosis, Gariga di Podenzano, (PC), Italy
| | - Norma Arrigoni
- Istituto Zooprofilattico Sperimentale dell'Emilia Romagna e della Lombardia, Sezione di Piacenza-Gariga, Strada della Faggiola 1, 29027, National Reference Centre for Paratuberculosis, Gariga di Podenzano, (PC), Italy
| | - Simone Russo
- Istituto Zooprofilattico Sperimentale dell'Emilia Romagna e della Lombardia, Sezione di Piacenza-Gariga, Strada della Faggiola 1, 29027, National Reference Centre for Paratuberculosis, Gariga di Podenzano, (PC), Italy
| | - Stefano Giacomelli
- Istituto Zooprofilattico Sperimentale dell'Emilia Romagna e della Lombardia, Sezione di Brescia, Via Bianchi 7/9, 25124, Brescia, Italy
| | - Alessandro Bianchi
- Istituto Zooprofilattico Sperimentale dell'Emilia Romagna e della Lombardia, Sezione di Sondrio, Via Bormio 30, 23100, Sondrio, Italy
| | - Karin Trevisiol
- Istituto Zooprofilattico Sperimentale delle Venezie, Sezione di Bolzano, Via Laura Conti 4, 39100, Bolzano, Italy
| | - Ilda Idrizi
- Istituto Zooprofilattico Sperimentale delle Venezie, Sezione di Bolzano, Via Laura Conti 4, 39100, Bolzano, Italy
| | - Gezim Daka
- Istituto Zooprofilattico Sperimentale delle Venezie, Sezione di Bolzano, Via Laura Conti 4, 39100, Bolzano, Italy
| | - Filippo Fratini
- Department of Veterinary Sciences, University of Pisa, Viale delle Piagge, 2, 56124 Pisa, Italy
| | - Barbara Turchi
- Department of Veterinary Sciences, University of Pisa, Viale delle Piagge, 2, 56124 Pisa, Italy
| | - Domenico Cerri
- Department of Veterinary Sciences, University of Pisa, Viale delle Piagge, 2, 56124 Pisa, Italy
| | - Matteo Ricchi
- Istituto Zooprofilattico Sperimentale dell'Emilia Romagna e della Lombardia, Sezione di Piacenza-Gariga, Strada della Faggiola 1, 29027, National Reference Centre for Paratuberculosis, Gariga di Podenzano, (PC), Italy
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Early detection of Mycobacterium avium subsp. paratuberculosis infection in cattle with multiplex-bead based immunoassays. PLoS One 2017; 12:e0189783. [PMID: 29261761 PMCID: PMC5736219 DOI: 10.1371/journal.pone.0189783] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Accepted: 12/01/2017] [Indexed: 01/12/2023] Open
Abstract
Johne’s Disease (JD), caused by Mycobacterium avium subspecies paratuberculosis (MAP), results in significant economic loss to livestock production. The early detection of MAP infection in animals with extant serological assays has remained challenging due to the low sensitivity of commercially available ELISA tests, a fact that has hampered the development of effective JD control programs. Our recent protein microarray-based studies identified several promising candidate antigens that are immunogenic during different stages of MAP infection. To evaluate these antigens for use in diagnostic assays and reliably identify animals with MAP infection, a multiplex (Luminex®) assay was developed using color-coded flourescent beads coupled to 6 MAP recombinant proteins and applied to screen 180 serum and 90 milk samples from cows at different stages of MAP infection including negative (NL), fecal test positive/ELISA negative (F+E-), and fecal positive/ELISA positive (F+E+). The results show that while serum antibody reactivities to each of the 6 antigens were highest in F+E+ group, antibody reactivity to three of the six antigens were identified in the F+E- group, suggesting that these three antigens are expressed and provoke antibody responses during the early infection stages with MAP. Further, antibodies against all six antigens were elevated in milk samples from both the F+E- and F+E+ groups in comparison to the NL group (p<0.01). Taken together, the results of our investigation suggest that multiplex bead-based assays are able to reliably identify MAP infection, even during early stages when antibody responses in animals are undetectable with widely used commercial ELISA tests.
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Identification of sero-reactive antigens for the early diagnosis of Johne's disease in cattle. PLoS One 2017; 12:e0184373. [PMID: 28863177 PMCID: PMC5581170 DOI: 10.1371/journal.pone.0184373] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Accepted: 08/22/2017] [Indexed: 12/18/2022] Open
Abstract
Mycobacterium avium subsp. paratuberculosis (MAP) is the causative agent of Johne's disease (JD), a chronic intestinal inflammatory disease of cattle and other ruminants. JD has a high herd prevalence and causes serious animal health problems and significant economic loss in domesticated ruminants throughout the world. Since serological detection of MAP infected animals during the early stages of infection remains challenging due to the low sensitivity of extant assays, we screened 180 well-characterized serum samples using a whole proteome microarray from Mycobacterium tuberculosis (MTB), a close relative of MAP. Based on extensive testing of serum and milk samples, fecal culture and qPCR for direct detection of MAP, the samples were previously assigned to one of 4 groups: negative low exposure (n = 30, NL); negative high exposure (n = 30, NH); fecal positive, ELISA negative (n = 60, F+E-); and fecal positive, ELISA positive (n = 60, F+E+). Of the 740 reactive proteins, several antigens were serologically recognized early but not late in infection, suggesting a complex and dynamic evolution of the MAP humoral immune response during disease progression. Ordinal logistic regression models identified a subset of 47 candidate proteins with significantly different normalized intensity values (p<0.05), including 12 in the NH and 23 in F+E- groups, suggesting potential utility for the early detection of MAP infected animals. Next, the diagnostic utility of four MAP orthologs (MAP1569, MAP2942c, MAP2609, and MAP1272c) was assessed and reveal moderate to high diagnostic sensitivities (range 48.3% to 76.7%) and specificity (range 96.7% to 100%), with a combined 88.3% sensitivity and 96.7% specificity. Taken together, the results of our analyses have identified several candidate MAP proteins of potential utility for the early detection of MAP infection, as well individual MAP proteins that may serve as the foundation for the next generation of well-defined serological diagnosis of JD in cattle.
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Suwandi A, Bargen I, Pils MC, Krey M, Zur Lage S, Singh AK, Basler T, Falk CS, Seidler U, Hornef MW, Goethe R, Weiss S. CD4 T Cell Dependent Colitis Exacerbation Following Re-Exposure of Mycobacterium avium ssp. paratuberculosis. Front Cell Infect Microbiol 2017; 7:75. [PMID: 28361039 PMCID: PMC5352692 DOI: 10.3389/fcimb.2017.00075] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Accepted: 02/27/2017] [Indexed: 11/21/2022] Open
Abstract
Mycobacterium avium ssp. paratuberculosis (MAP) is the causative agent of Johne's disease (JD), a chronic inflammatory bowel disease of cattle characterized by intermittent to chronic diarrhea. In addition, MAP has been isolated from Crohn's disease (CD) patients. The impact of MAP on severity of clinical symptoms in JD as well as its role in CD are yet unknown. We have previously shown that MAP is able to colonize inflamed enteric tissue and to exacerbate the inflammatory tissue response (Suwandi et al., 2014). In the present study, we analyzed how repeated MAP administration influences the course of dextran sulfate sodium (DSS)-induced colitis. In comparison to mice exposed to DSS or MAP only, repeated exposure of DSS-treated mice to MAP (DSS/MAP) revealed a significantly enhanced clinical score, reduction of colon length as well as severe CD4+ T cell infiltration into the colonic lamina propria. Functional analysis identified a critical role of CD4+ T cells in the MAP-induced disease exacerbation. Additionally, altered immune responses were observed when closely related mycobacteria species such as M. avium ssp. avium and M. avium ssp. hominissuis were administered. These data reveal the specific ability of MAP to aggravate intestinal inflammation and clinical symptoms. Overall, this phenotype is compatible with similar disease promoting capabilites of MAP in JD and CD.
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Affiliation(s)
- Abdulhadi Suwandi
- Molecular Immunology, Helmholtz Centre for Infection ResearchBraunschweig, Germany; German Centre for Infection Research, Institute of Medical Microbiology and Hospital Epidemiology, Hannover Medical SchoolHannover, Germany
| | - Imke Bargen
- Molecular Immunology, Helmholtz Centre for Infection Research Braunschweig, Germany
| | - Marina C Pils
- Mouse Pathology, Helmholtz Centre for Infection Research Braunschweig, Germany
| | - Martina Krey
- Molecular Immunology, Helmholtz Centre for Infection Research Braunschweig, Germany
| | - Susanne Zur Lage
- Molecular Immunology, Helmholtz Centre for Infection Research Braunschweig, Germany
| | - Anurag K Singh
- Department of Gastroenterology, Hepatology, Endocrinology, Hannover Medical School Hannover, Germany
| | - Tina Basler
- Institute for Microbiology, University of Veterinary Medicine Hannover Hannover, Germany
| | - Christine S Falk
- Integrated Research and Treatment Center Transplantation, Institute of Transplant Immunology, Hannover Medical School Hannover, Germany
| | - Ursula Seidler
- Department of Gastroenterology, Hepatology, Endocrinology, Hannover Medical School Hannover, Germany
| | - Mathias W Hornef
- Institute of Medical Microbiology, RWTH University Hospital Aachen Aachen, Germany
| | - Ralph Goethe
- Institute for Microbiology, University of Veterinary Medicine Hannover Hannover, Germany
| | - Siegfried Weiss
- Molecular Immunology, Helmholtz Centre for Infection ResearchBraunschweig, Germany; Institute of Immunology, Hannover Medical SchoolHannover, Germany
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25
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Uchiya KI, Tomida S, Nakagawa T, Asahi S, Nikai T, Ogawa K. Comparative genome analyses of Mycobacterium avium reveal genomic features of its subspecies and strains that cause progression of pulmonary disease. Sci Rep 2017; 7:39750. [PMID: 28045086 PMCID: PMC5206733 DOI: 10.1038/srep39750] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Accepted: 11/28/2016] [Indexed: 11/25/2022] Open
Abstract
Pulmonary disease caused by nontuberculous mycobacteria (NTM) is increasing worldwide. Mycobacterium avium is the most clinically significant NTM species in humans and animals, and comprises four subspecies: M. avium subsp. avium (MAA), M. avium subsp. silvaticum (MAS), M. avium subsp. paratuberculosis (MAP), and M. avium subsp. hominissuis (MAH). To improve our understanding of the genetic landscape and diversity of M. avium and its role in disease, we performed a comparative genome analysis of 79 M. avium strains. Our analysis demonstrated that MAH is an open pan-genome species. Phylogenetic analysis based on single nucleotide variants showed that MAH had the highest degree of sequence variability among the subspecies, and MAH strains isolated in Japan and those isolated abroad possessed distinct phylogenetic features. Furthermore, MAP strains, MAS and MAA strains isolated from birds, and many MAH strains that cause the progression of pulmonary disease were grouped in each specific cluster. Comparative genome analysis revealed the presence of genetic elements specific to each lineage, which are thought to be acquired via horizontal gene transfer during the evolutionary process, and identified potential genetic determinants accounting for the pathogenic and host range characteristics of M. avium.
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Affiliation(s)
- Kei-Ichi Uchiya
- Department of Microbiology, Faculty of Pharmacy, Meijo University, Nagoya 468-8503, Japan
| | - Shuta Tomida
- Department of Biobank, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8558, Japan
| | - Taku Nakagawa
- Department of Clinical Research, National Hospital Organization, Higashinagoya National Hospital, Nagoya 465-8620, Japan.,Department of Respiratory Medicine, National Hospital Organization, Higashinagoya National Hospital, Nagoya 465-8620, Japan
| | - Shoki Asahi
- Department of Microbiology, Faculty of Pharmacy, Meijo University, Nagoya 468-8503, Japan
| | - Toshiaki Nikai
- Department of Microbiology, Faculty of Pharmacy, Meijo University, Nagoya 468-8503, Japan
| | - Kenji Ogawa
- Department of Clinical Research, National Hospital Organization, Higashinagoya National Hospital, Nagoya 465-8620, Japan.,Department of Respiratory Medicine, National Hospital Organization, Higashinagoya National Hospital, Nagoya 465-8620, Japan
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26
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Serraino A, Bonilauri P, Giacometti F, Ricchi M, Cammi G, Piva S, Zambrini V, Canever A, Arrigoni N. Short communication: Investigation into Mycobacterium avium ssp. paratuberculosis in pasteurized milk in Italy. J Dairy Sci 2016; 100:118-123. [PMID: 27816242 DOI: 10.3168/jds.2016-11627] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Accepted: 09/11/2016] [Indexed: 11/19/2022]
Abstract
This study investigated the presence of viable Mycobacterium avium ssp. paratuberculosis (MAP) in pasteurized milk produced by Italian industrial dairy plants to verify the prediction of a previously performed risk assessment. The study analyzed 160 one-liter bottles of pasteurized milk from 2 dairy plants located in 2 different regions. Traditional cultural protocols were applied to 500mL of pasteurized milk for each sample. The investigation focused also on the pasteurization parameters and data on the microbiological characteristics of raw milk (total bacterial count) and pasteurized milk (Enterobacteriaceae and Listeria monocytogenes). No sample was positive for MAP, the pasteurization parameters complied with European Union legislation, and the microbiological analysis of raw and pasteurized milk showed good microbiological quality. The results show that a 7-log (or >7) reduction could be a plausible value for commercial pasteurization. The combination of hygiene practices at farm level and commercial pasteurization yield very low or absent levels of MAP contamination in pasteurized milk, suggesting that pasteurized milk is not a significant source of human exposure to MAP in the dairies investigated.
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Affiliation(s)
- A Serraino
- Department of Veterinary Medical Sciences, University of Bologna, Via Tolara di Sopra 50, 40064 Ozzano Emilia (BO), Italy
| | - P Bonilauri
- Institute for Zooprophylaxis in Lombardy and Emilia-Romagna, Via Pitagora 2, 42100 Reggio Emilia, Italy
| | - F Giacometti
- Department of Veterinary Medical Sciences, University of Bologna, Via Tolara di Sopra 50, 40064 Ozzano Emilia (BO), Italy.
| | - M Ricchi
- National Reference Centre for Paratuberculosis, Experimental Institute for Zooprophylaxis in Lombardy and Emilia-Romagna, Strada della Faggiola 1, 29027 Gariga di Podenzano (PC), Italy
| | - G Cammi
- National Reference Centre for Paratuberculosis, Experimental Institute for Zooprophylaxis in Lombardy and Emilia-Romagna, Strada della Faggiola 1, 29027 Gariga di Podenzano (PC), Italy
| | - S Piva
- Department of Veterinary Medical Sciences, University of Bologna, Via Tolara di Sopra 50, 40064 Ozzano Emilia (BO), Italy
| | - V Zambrini
- Granarolo s.p.a, Via Cadriano 27/2, 40121 Bologna, Italy
| | - A Canever
- Granarolo s.p.a, Via Cadriano 27/2, 40121 Bologna, Italy
| | - N Arrigoni
- National Reference Centre for Paratuberculosis, Experimental Institute for Zooprophylaxis in Lombardy and Emilia-Romagna, Strada della Faggiola 1, 29027 Gariga di Podenzano (PC), Italy
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27
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Ricchi M, Savi R, Bolzoni L, Pongolini S, Grant IR, De Cicco C, Cerutti G, Cammi G, Garbarino CA, Arrigoni N. Estimation of Mycobacterium avium subsp. paratuberculosis load in raw bulk tank milk in Emilia-Romagna Region (Italy) by qPCR. Microbiologyopen 2016; 5:551-9. [PMID: 26991108 PMCID: PMC4985589 DOI: 10.1002/mbo3.350] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 02/04/2016] [Accepted: 02/12/2016] [Indexed: 11/15/2022] Open
Abstract
Consumption of milk and dairy products is considered one of the main routes of human exposure to Mycobacterium avium subsp. paratuberculosis (MAP). Quantitative data on MAP load in raw cows' milk are essential starting point for exposure assessment. Our study provides this information on a regional scale, estimating the load of MAP in bulk tank milk (BTM) produced in Emilia-Romagna region (Italy). The survey was carried out on 2934 BTM samples (88.6% of the farms herein present) using two different target sequences for qPCR (f57 and IS900). Data about the performances of both qPCRs are also reported, highlighting the superior sensitivity of IS900-qPCR. Seven hundred and eighty-nine samples tested MAP-positive (apparent prevalence 26.9%) by IS900 qPCR. However, only 90 of these samples were quantifiable by qPCR. The quantifiable samples contained a median load of 32.4 MAP cells mL(-1) (and maximum load of 1424 MAP cells mL(-1) ). This study has shown that a small proportion (3.1%) of BTM samples from Emilia-Romagna region contained MAP in excess of the limit of detection (1.5 × 10(1) MAP cells mL(-1) ), indicating low potential exposure for consumers if the milk subsequently undergoes pasteurization or if it is destined to typical hard cheese production.
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Affiliation(s)
- Matteo Ricchi
- Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia‐RomagnaNational Reference Centre for ParatuberculosisStrada Faggiola 1, loc.Gariga ‐ Podenzano (PC)29027Italy
| | - Roberto Savi
- Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia‐RomagnaNational Reference Centre for ParatuberculosisStrada Faggiola 1, loc.Gariga ‐ Podenzano (PC)29027Italy
| | - Luca Bolzoni
- Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia‐RomagnaCentro di Referenza Nazionale per i Rischi Emergenti in Sicurezza Alimentare20133MilanItaly
- Risk Analysis UnitIstituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia‐RomagnaVia dei Mercati 13/AParma43121Italy
| | - Stefano Pongolini
- Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia‐RomagnaCentro di Referenza Nazionale per i Rischi Emergenti in Sicurezza Alimentare20133MilanItaly
- Risk Analysis UnitIstituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia‐RomagnaVia dei Mercati 13/AParma43121Italy
| | - Irene R Grant
- Institute for Global Food SecuritySchool of Biological SciencesQueen's University Belfast97 Lisburn RoadBelfastBT9 7BLNorthern IrelandUnited Kingdom
| | - Caterina De Cicco
- Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia‐RomagnaNational Reference Centre for ParatuberculosisStrada Faggiola 1, loc.Gariga ‐ Podenzano (PC)29027Italy
| | - Giulia Cerutti
- Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia‐RomagnaNational Reference Centre for ParatuberculosisStrada Faggiola 1, loc.Gariga ‐ Podenzano (PC)29027Italy
| | - Giuliana Cammi
- Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia‐RomagnaNational Reference Centre for ParatuberculosisStrada Faggiola 1, loc.Gariga ‐ Podenzano (PC)29027Italy
| | - Chiara A. Garbarino
- Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia‐RomagnaNational Reference Centre for ParatuberculosisStrada Faggiola 1, loc.Gariga ‐ Podenzano (PC)29027Italy
| | - Norma Arrigoni
- Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia‐RomagnaNational Reference Centre for ParatuberculosisStrada Faggiola 1, loc.Gariga ‐ Podenzano (PC)29027Italy
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28
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Chaubey KK, Gupta RD, Gupta S, Singh SV, Bhatia AK, Jayaraman S, Kumar N, Goel A, Rathore AS, Sahzad, Sohal JS, Stephen BJ, Singh M, Goyal M, Dhama K, Derakhshandeh A. Trends and advances in the diagnosis and control of paratuberculosis in domestic livestock. Vet Q 2016; 36:203-227. [PMID: 27356470 DOI: 10.1080/01652176.2016.1196508] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Paratuberculosis (pTB) is a chronic granulomatous enteritis caused by Mycobacterium avium subsp. paratuberculosis (MAP) in a wide variety of domestic and wild animals. Control of pTB is difficult due to the lack of sensitive, efficacious and cost-effective diagnostics and marker vaccines. Microscopy, culture, and PCR have been used for the screening of MAP infection in animals for quite a long time. Besides, giving variable sensitivity and specificity, these tests have not been considered ideal for large-scale screening of domestic livestock. Serological tests like ELISA easily detects anti-MAP antibodies. However, it cannot differentiate between the vaccinated and infected animals. Nanotechnology-based diagnostic tests are underway to improve the sensitivity and specificity. Newer generation diagnostic tests based on recombinant MAP secretory proteins would open new paradigm for the differentiation between infected and vaccinated animals and for early detection of the infection. Due to higher seroreactivity of secretory proteins vis-à-vis cellular proteins, the secretory proteins may be used as marker vaccine, which may aid in the control of pTB infection in animals. Secretory proteins can be potentially used to develop future diagnostics, surveillance and monitoring of the disease progression in animals and the marker vaccine for the control and eradication of pTB.
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Affiliation(s)
- Kundan Kumar Chaubey
- a Microbiology Laboratory, Animal Health Division , Central Institute for Research on Goats , Mathura , India.,b Department of Microbiology and Immunology , GLA University , Mathura , India
| | - Rinkoo Devi Gupta
- c Department of Life sciences and Biotechnology , South Asian University , New Delhi , India
| | - Saurabh Gupta
- a Microbiology Laboratory, Animal Health Division , Central Institute for Research on Goats , Mathura , India.,b Department of Microbiology and Immunology , GLA University , Mathura , India
| | - Shoor Vir Singh
- a Microbiology Laboratory, Animal Health Division , Central Institute for Research on Goats , Mathura , India
| | - Ashok Kumar Bhatia
- b Department of Microbiology and Immunology , GLA University , Mathura , India
| | - Sujata Jayaraman
- d Amity Institutes of Microbial Technology , Amity University , Jaipur , India
| | - Naveen Kumar
- a Microbiology Laboratory, Animal Health Division , Central Institute for Research on Goats , Mathura , India
| | - Anjana Goel
- b Department of Microbiology and Immunology , GLA University , Mathura , India
| | - Abhishek Singh Rathore
- c Department of Life sciences and Biotechnology , South Asian University , New Delhi , India
| | - Sahzad
- a Microbiology Laboratory, Animal Health Division , Central Institute for Research on Goats , Mathura , India
| | - Jagdip Singh Sohal
- d Amity Institutes of Microbial Technology , Amity University , Jaipur , India
| | - Bjorn John Stephen
- a Microbiology Laboratory, Animal Health Division , Central Institute for Research on Goats , Mathura , India
| | - Manju Singh
- a Microbiology Laboratory, Animal Health Division , Central Institute for Research on Goats , Mathura , India
| | - Manish Goyal
- e Division of Parasitology , Central Drug Research Institute , Lucknow , India
| | - Kuldeep Dhama
- f Pathology Division , Indian Veterinary Research Institute (IVRI) , Bareilly , India
| | - Abdollah Derakhshandeh
- g Department of Pathobiology, School of Veterinary Medicine , Shiraz University , Shiraz , Iran
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29
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Tanaka S, Sato M, Onitsuka T, Kamata H, Yokomizo Y. Inflammatory Cytokine Gene Expression in Different Types of Granulomatous Lesions during Asymptomatic Stages of Bovine Paratuberculosis. Vet Pathol 2016; 42:579-88. [PMID: 16145204 DOI: 10.1354/vp.42-5-579] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The granulomatous lesions in bovine paratuberculosis have been classified into two types, i.e., the lepromatous type and the tuberculoid type. To clarify the immunopathologic mechanisms at the site of infection, we compared inflammatory cytokine gene expression between the two types of lesions. Samples were obtained from noninfected control cows ( n =5) and naturally infected cows ( n =7) that were diagnosed by enzyme-linked immunosorbent assay (ELISA) and fecal culture test. Although none of the infected cows showed clinical signs, tuberculoid lesions were observed in five cows (tuberculoid group) and lepromatous lesions in two cows (lepromatous group). Among the cytokines examined by reverse transcription-polymerase chain reaction (RT-PCR), Th2-type cytokines interleukin-4 (IL-4) and IL-10, and Th1-type cytokine IL-2 were expressed more significantly in the lepromatous group than in the tuberculoid ( P < 0.01) and noninfected groups ( P < 0.05). No statistical differences were observed in the expression of interferon-gamma, IL-1 beta, TNF-alpha, and GM-CSF among lepromatous, tuberculoid, and noninfected groups. Expression of proinflammatory cytokine IL-12 mRNA, however, did not differ among the three groups; IL-18 was expressed at lower levels in the lepromatous group than in the tuberculoid group and the noninfected group ( P < 0.0001). Moreover, the number of cells in which IL-18 mRNAs were detected by in situ hybridization was markedly decreased in the lepromatous group. These results indicate that the formation of lepromatous-type lesions or tuberculoid-type lesions may be influenced by alterations in Th1/Th2-type cytokine production and that IL-18 may play an important role in a Th1-to-Th2 switch in paratuberculosis.
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Affiliation(s)
- S Tanaka
- Comparative Pathology Section, Kyushu Research Station, National Institute of Animal Health, Chuzan-cho 2702, Kagoshima 891-0105, Japan.
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30
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Kim SG, Kim EH, Lafferty CJ, Miller LJ, Koo HJ, Stehman SM, Shin SJ. Use of Conventional and Real-Time Polymerase Chain Reaction for Confirmation of Mycobacterium Avium Subsp. Paratuberculosis in a Broth-Based Culture System ESP II. J Vet Diagn Invest 2016; 16:448-53. [PMID: 15460331 DOI: 10.1177/104063870401600515] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The ESP II Culture System (ESP II), a broth-based culture system, has been modified and optimized for culturing Mycobacterium avium subsp. paratuberculosis ( M. paratuberculosis) in animal feces since 2000. Conventional and real-time polymerase chain reaction (PCR) assays based on the IS 900 sequence were performed as confirmatory tests for M. paratuberculosis in ESP II liquid culture medium. There were no differences between test results of conventional and real-time PCR assays. During the 5-week incubation period, if acid-fast bacilli (AFB) were detected in ESP culture–positive samples, IS 900 PCR assays were performed to confirm whether those AFB were M. paratuberculosis. At the end of the 5-week incubation, AF staining was performed on all ESP II–negative cultures to screen any false-negative cultures; IS 900 PCR assays were performed on AFB-positive cultures. During a period of 1 year, of a total of 18,499 ESP II cultures, 2,814 (15.2%) PCR confirmation assays were performed. Of those, 2,259 (80%) were both ESP and PCR positive; 104 (4%) were ESP positive and PCR negative; 423 (15%) were ESP negative and PCR positive; 28 (1%) were both ESP and PCR negative. The AF-staining step after the 5-week incubation produced 423 (15%) more PCR-positive cultures. Of a total of 2,814 AFB-positive cultures, 132 (5%) were not confirmed as M. paratuberculosis. Further studies are needed for speciation of non– M. paratuberculosis isolates.
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Affiliation(s)
- Sung G Kim
- Animal Health Diagnostic Laboratory, Department of Population Medicine and Diagnostic Sciences, New York State College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA
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31
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Stabel JR, Bosworth TL, Kirkbride TA, Forde RL, Whitlock RH. A Simple, Rapid, and Effective Method for the Extraction of Mycobacterium Paratuberculosis DNA from Fecal Samples for Polymerase Chain Reaction. J Vet Diagn Invest 2016; 16:22-30. [PMID: 14974843 DOI: 10.1177/104063870401600105] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Diagnosis of paratuberculosis (Johne's disease) is stymied by the lack of 1 diagnostic tool that can be used to detect both subclinically and clinically infected animals. At present, fecal culture remains the single diagnostic test that can detect infection in both disease states provided the animals actively shed Mycobacterium paratuberculosis in their feces. Yet, fecal culture has a disadvantage associated with the protracted incubation period of 8–16 weeks before results are available. Detection of nucleic acids specific to M. paratuberculosis in fecal samples is a technique that can circumvent the culture method. This study describes a rapid, simple, and effective method to extract DNA from fecal samples and modification of a polymerase chain reaction assay for optimal sensitivity of detection. An evaluation of 1,000 well-characterized fecal samples was performed by the Colorado Department of Agriculture (Denver, CO) and the National Animal Disease Center (Ames, IA) to determine the sensitivity, specificity, and reproducibility of the new method. Results from this study show that the sensitivity of detection was highly dependent on the load of bacteria in the fecal sample with 81% detection of samples containing >70 colony-forming units (cfu)/g of feces and a 45% detection rate for samples containing less than 1 cfu/g. Similarly, reproducibility of the technique between the 2 laboratories ( n = 250 samples) was much higher (75%) for the fecal samples containing high levels of M. paratuberculosis and reduced to 25% for samples with less than 1 cfu/g. An overall specificity of 83% was obtained for known negative samples. The method described here is rapid, simple, and inexpensive compared with other techniques. In addition, this method can detect animals that are shedding less than 1 cfu/g.
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Affiliation(s)
- J R Stabel
- USDA-ARS, National Animal Disease Center, Ames, IA 50010, USA
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Hempel RJ, Bannantine JP, Stabel JR. Transcriptional Profiling of Ileocecal Valve of Holstein Dairy Cows Infected with Mycobacterium avium subsp. Paratuberculosis. PLoS One 2016; 11:e0153932. [PMID: 27093613 PMCID: PMC4836751 DOI: 10.1371/journal.pone.0153932] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Accepted: 04/06/2016] [Indexed: 12/22/2022] Open
Abstract
Johne’s disease is a chronic infection of the small intestine caused by Mycobacterium avium subspecies paratuberculosis (MAP), an intracellular bacterium. The events of pathogen survival within the host cell(s), chronic inflammation and the progression from asymptomatic subclinical stage to an advanced clinical stage of infection, are poorly understood. This study examines gene expression in the ileocecal valve (ICV) of Holstein dairy cows at different stages of MAP infection. The ICV is known to be a primary site of MAP colonization and provides an ideal location to identify genes that are relevant to the progression of this disease. RNA was prepared from ICV tissues and RNA-Seq was used to compare gene transcription between clinical, subclinical, and uninfected control animals. Interpretation of the gene expression data was performed using pathway analysis and gene ontology categories containing multiple differentially expressed genes. Results demonstrated that many of the pathways that had strong differential gene expression between uninfected control and clinical cows were related to the immune system, such as the T- and B-cell receptor signaling, apoptosis, NOD-like receptor signaling, and leukocyte transendothelial migration pathways. In contrast, the comparison of gene transcription between control and subclinical cows identified pathways that were primarily involved in metabolism. The results from the comparison between clinical and subclinical animals indicate recruitment of neutrophils, up regulation of lysosomal peptidases, increase in immune cell transendothelial migration, and modifications of the extracelluar matrix. This study provides important insight into how cattle respond to a natural MAP infection at the gene transcription level within a key target tissue for infection.
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Affiliation(s)
- Randy J. Hempel
- USDA-Agricultural Research Service (ARS), National Animal Disease Center, Ames, Iowa, United States of America
| | - John P. Bannantine
- USDA-Agricultural Research Service (ARS), National Animal Disease Center, Ames, Iowa, United States of America
| | - Judith R. Stabel
- USDA-Agricultural Research Service (ARS), National Animal Disease Center, Ames, Iowa, United States of America
- * E-mail:
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Garcia AB, Shalloo L. Invited review: The economic impact and control of paratuberculosis in cattle. J Dairy Sci 2016; 98:5019-39. [PMID: 26074241 DOI: 10.3168/jds.2014-9241] [Citation(s) in RCA: 141] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Accepted: 04/20/2015] [Indexed: 11/19/2022]
Abstract
Paratuberculosis (also called Johne's disease) is a chronic disease caused by Mycobacterium avium ssp. paratuberculosis (MAP) that affects ruminants and other animals. The epidemiology of paratuberculosis is complex and the clinical manifestations and economic impact of the disease in cattle can be variable depending on factors such as herd management, age, infection dose, and disease prevalence, among others. Additionally, considerable challenges are faced in the control of paratuberculosis in cattle, such as the lack of accurate and reliable diagnostic tests. Nevertheless, efforts are directed toward the control of this disease because it can cause substantial economic losses to the cattle industry mainly due to increased premature culling, replacement costs, decreased milk yield, reduced feed conversion efficiency, fertility problems, reduced slaughter values, and increased susceptibility to other diseases or conditions. The variability and uncertainty surrounding the estimations of paratuberculosis prevalence and impact influence the design, implementation, and efficiency of control programs in diverse areas of the world. This review covers important aspects of the economic impact and control of paratuberculosis, including challenges related to disease detection, estimations of the prevalence and economic effects of the disease, and the implementation of control programs. The control of paratuberculosis can improve animal health and welfare, increase productivity, reduce potential market problems, and increase overall business profitability. The benefits that can derive from the control of paratuberculosis need to be communicated to all industry stakeholders to promote the implementation of control programs. Moreover, if the suspected link between Johne's disease in ruminants and Crohn's disease in humans was established, significant economic losses could be expected, particularly for the dairy industry, making the control of this disease a priority across dairy industries internationally.
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Affiliation(s)
- A B Garcia
- Animal and Grassland Research and Innovation Centre, Teagasc Moorepark, Fermoy, Co. Cork, Ireland.
| | - L Shalloo
- Animal and Grassland Research and Innovation Centre, Teagasc Moorepark, Fermoy, Co. Cork, Ireland
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Li L, Katani R, Schilling M, Kapur V. Molecular Epidemiology ofMycobacterium aviumsubsp.paratuberculosison Dairy Farms. Annu Rev Anim Biosci 2016; 4:155-76. [DOI: 10.1146/annurev-animal-021815-111304] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Lingling Li
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, Pennsylvania 16802; , , ,
| | - Robab Katani
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, Pennsylvania 16802; , , ,
| | - Megan Schilling
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, Pennsylvania 16802; , , ,
| | - Vivek Kapur
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, Pennsylvania 16802; , , ,
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Donnellan S, Tran L, Johnston H, McLuckie J, Stevenson K, Stone V. A rapid screening assay for identifying mycobacteria targeted nanoparticle antibiotics. Nanotoxicology 2016; 10:761-9. [DOI: 10.3109/17435390.2015.1124468] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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O’Brien LM, Stewart LD, Strain SAJ, Grant IR. Novel Monoclonal Antibody and Peptide Binders for Mycobacterium avium subsp. paratuberculosis and Their Application for Magnetic Separation. PLoS One 2016; 11:e0147870. [PMID: 26815790 PMCID: PMC4729677 DOI: 10.1371/journal.pone.0147870] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Accepted: 11/23/2015] [Indexed: 02/07/2023] Open
Abstract
The generation of novel Mycobacterium avium subsp. paratuberculosis (MAP)-specific monoclonal antibodies and phage-display derived peptide binders, along with their application for the magnetic separation (MS) of MAP cells, is described. Our aim was to achieve even greater MAP capture capability than is possible with peptide-mediated magnetic separation (PMS) using a 50:50 mix of biotinylated-aMp3 and biotinylated-aMptD peptide-coated beads. Gamma-irradiated whole MAP cells and ethanol extracted antigens (EEA) from these cells were used to elicit an immune response and as phage-display biopanning targets. A range of novel binders was obtained and coated onto paramagnetic beads, both individually and in various combinations, for MS evaluation. IS900 PCR was employed after MS to provide quick results. Capture sensitivity was assessed using a range of MAP concentrations after which the most promising beads were tested for their specificity for MAP, by performing MS followed by culture using 10 other Mycobacterium species. Magnetic beads coated with the biotinylated EEA402 peptide demonstrated a greater level of MAP capture than the current PMS method, even when low numbers of MAP (<10 cfu/ml) were present; however these beads also captured a range of other mycobacteria and so lacked capture specificity. Magnetic beads coated with monoclonal antibodies 6G11 and 15D10 (used as a 50:50 mix or as dually coated beads) also demonstrated improved MAP capture relative to the current PMS method, but with little cross-reactivity to other Mycobacterium spp. Therefore, two new MS protocols are suggested, the application of which would be dependent upon the required endpoint. Biotinylated EEA402-coated beads could potentially be used with a MAP-specific PCR to ensure detection specificity, while beads coated with 6G11 and 15D10 monoclonal antibodies could be used with culture or the phage amplification assay.
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Affiliation(s)
- Lorna M. O’Brien
- Institute for Global Food Security, School of Biological Sciences, Queen’s University Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast, BT9 7BL, Northern Ireland, United Kingdom
| | - Linda D. Stewart
- Institute for Global Food Security, School of Biological Sciences, Queen’s University Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast, BT9 7BL, Northern Ireland, United Kingdom
| | - Sam A. J. Strain
- Animal Health and Welfare Northern Ireland, 97 Moy Road, Dungannon, Co.Tyrone, BT71 7DX, Northern Ireland, United Kingdom
| | - Irene R. Grant
- Institute for Global Food Security, School of Biological Sciences, Queen’s University Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast, BT9 7BL, Northern Ireland, United Kingdom
- * E-mail:
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Alluwaimi AM. Paratuberculosis Infection in Camel (<i>Camelus dromidarius</i>): Current and Prospective Overview. ACTA ACUST UNITED AC 2015. [DOI: 10.4236/ojvm.2015.57021] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Atreya R, Bülte M, Gerlach GF, Goethe R, Hornef MW, Köhler H, Meens J, Möbius P, Roeb E, Weiss S. Facts, myths and hypotheses on the zoonotic nature of Mycobacterium avium subspecies paratuberculosis. Int J Med Microbiol 2014; 304:858-67. [PMID: 25128370 DOI: 10.1016/j.ijmm.2014.07.006] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Mycobacterium avium subspecies paratuberculosis (MAP) is the causative agent of paratuberculosis (Johne's disease [JD]), a chronic granulomatous enteritis in ruminants. JD is one of the most widespread bacterial diseases of domestic animals with significant economic impact. The histopathological picture of JD resembles that of Crohn's disease (CD), a human chronic inflammatory bowel disease of still unresolved aetiology. An aetiological relevance of MAP for CD has been proposed. This and the ambiguity of other published epidemiological findings raise the question whether MAP represents a zoonotic agent. In this review, we will discuss evidence that MAP has zoonotic capacity.
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Affiliation(s)
- Raja Atreya
- Medical Clinic 1, University of Erlangen-Nuermberg, Ulmenweg 18, D-91054 Erlangen, Germany
| | - Michael Bülte
- Institute of Veterinary Food Science, Faculty of Veterinary Medicine, Justus Liebig University, Frankfurter Straße 92, 35392 Gießen, Germany
| | | | - Ralph Goethe
- Institute for Microbiology, Department of Infectious Diseases, University of Veterinary Medicine Hannover, Bischofsholer Damm 15, 30173 Hannover, Germany.
| | - Mathias W Hornef
- Department of Microbiology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
| | - Heike Köhler
- Institute of Molecular Pathogenesis, Friedrich-Loeffler-Institut (Federal Research Institute for Animal Health), Naumburger Str. 96a, 07743 Jena, Germany
| | - Jochen Meens
- Institute for Microbiology, Department of Infectious Diseases, University of Veterinary Medicine Hannover, Bischofsholer Damm 15, 30173 Hannover, Germany
| | - Petra Möbius
- Institute of Molecular Pathogenesis, Friedrich-Loeffler-Institut (Federal Research Institute for Animal Health), Naumburger Str. 96a, 07743 Jena, Germany
| | - Elke Roeb
- Justus-Liebig-University Giessen, Department of Gastroenterology, Klinikstr.33, 35392 Giessen, Germany
| | - Siegfried Weiss
- Helmholtz Centre for Infection Research, Molecular Immunology, Inhoffenstraße 7, 38124 Braunschweig, Germany
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Description of a novel adhesin of Mycobacterium avium subsp. paratuberculosis. BIOMED RESEARCH INTERNATIONAL 2014; 2014:729618. [PMID: 25136616 PMCID: PMC4130151 DOI: 10.1155/2014/729618] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/07/2014] [Accepted: 06/29/2014] [Indexed: 12/12/2022]
Abstract
The binding and ingestion of Mycobacterium avium subsp. paratuberculosis (MAP) by host cells are fibronectin (FN) dependent. In several species of mycobacteria, a specific family of proteins allows the attachment and internalization of these bacteria by epithelial cells through interaction with FN. Thus, the identification of adhesion molecules is essential to understand the pathogenesis of MAP. The aim of this study was to identify and characterize FN binding cell wall proteins of MAP. We searched for conserved adhesins within a large panel of surface immunogenic proteins of MAP and investigated a possible interaction with FN. For this purpose, a cell wall protein fraction was obtained and resolved by 2D electrophoresis. The immunoreactive spots were identified by MALDI-TOF MS and a homology search was performed. We selected elongation factor Tu (EF-Tu) as candidate for further studies. We demonstrated the FN-binding capability of EF-Tu using a ligand blot assay and also confirmed the interaction with FN in a dose-dependent manner by ELISA. The dissociation constant of EF-Tu was determined by surface plasmon resonance and displayed values within the μM range. These data support the hypothesis that this protein could be involved in the interaction of MAP with epithelial cells through FN binding.
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Begum J, Das P, Lingaraju MC, Ranjanna S, Irungbam K, Mohan A, Syam R. Evaluation of efficacy of saponin and freund's incomplete adjuvanted paratuberculosis vaccine in murine model. Vet World 2014. [DOI: 10.14202/vetworld.2014.528-535] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Hashemi M, Madani R, Razmi N. Evaluation of immunodominant proteins of Mycobacterium avium paratuberculosis cell wall by Western blot analysis. Monoclon Antib Immunodiagn Immunother 2014; 33:101-8. [PMID: 24746151 DOI: 10.1089/mab.2013.0075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Mycobacterium avium subspecies paratuberculosis (M. paratuberculosis) is a slow growing mycobactin, whose dependence on mycobacterial species is known to be the causative agent of Johne's disease (paratuberculosis) in all species of domestic ruminants worldwide. The organism is transmitted via close contact, ingestion, or transplacentally from mother to fetus and occurs commonly in grazing domestic animals. Johne's disease (JD) is characterized by gradual weight loss, decreased milk production, and diarrhea due to the chronic, progressive, granulomatous enteritis and lymphadenitis. The disease can cause serious economic damage to the dairy industry due to the loss of milk production and early culling of infected animals. In recent years, researchers have focused on the identification of a specific antigen of M. paratuberculosis to use in diagnosis test and preparation of effective vaccine. The goal of this study is evaluation of the immunodominant proteins of M. paratuberculosis cell wall. The amount of protein was determined with a Lowry assay (22.68 μg/100 μL). For production of polyclonal antibody against proteins of M. paratuberculosis cell wall, a New Zealand white rabbit was immunized with antigen and Freund's adjuvant. After immunization, the rabbit was bled to produce enriched serum. Antibodies were purified from serum with ion exchange chromatography. In the Ouchterlony test, the reactions between antigen and antibodies were seen in dilutions of one quarter for serum, one quarter for Ig, and one half for IgG by clear precipitation lines due to the well immunization of the rabbit. Electrophoresis and Western blot analysis were used and subsequently a sharp band appeared in nitrocellulose paper; these bands were about 25, 37, 50, 75, and 150 kDa molecular weight, which indicated immunodominant proteins.
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Affiliation(s)
- Maryam Hashemi
- 1 Department of Biochemistry, Science and Research Branch, Islamic Azad University , Fars, Iran
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Radomski N, Roguet A, Lucas FS, Veyrier FJ, Cambau E, Accrombessi H, Moilleron R, Behr MA, Moulin L. atpE gene as a new useful specific molecular target to quantify Mycobacterium in environmental samples. BMC Microbiol 2013; 13:277. [PMID: 24299240 PMCID: PMC4219376 DOI: 10.1186/1471-2180-13-277] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2013] [Accepted: 11/26/2013] [Indexed: 11/10/2022] Open
Abstract
Background The environment is the likely source of many pathogenic mycobacterial species but detection of mycobacteria by bacteriological tools is generally difficult and time-consuming. Consequently, several molecular targets based on the sequences of housekeeping genes, non-functional RNA and structural ribosomal RNAs have been proposed for the detection and identification of mycobacteria in clinical or environmental samples. While certain of these targets were proposed as specific for this genus, most are prone to false positive results in complex environmental samples that include related, but distinct, bacterial genera. Nowadays the increased number of sequenced genomes and the availability of software for genomic comparison provide tools to develop novel, mycobacteria-specific targets, and the associated molecular probes and primers. Consequently, we conducted an in silico search for proteins exclusive to Mycobacterium spp. genomes in order to design sensitive and specific molecular targets. Results Among the 3989 predicted proteins from M. tuberculosis H37Rv, only 11 proteins showed 80% to 100% of similarity with Mycobacterium spp. genomes, and less than 50% of similarity with genomes of closely related Corynebacterium, Nocardia and Rhodococcus genera. Based on DNA sequence alignments, we designed primer pairs and a probe that specifically detect the atpE gene of mycobacteria, as verified by quantitative real-time PCR on a collection of mycobacteria and non-mycobacterial species. The real-time PCR method we developed was successfully used to detect mycobacteria in tap water and lake samples. Conclusions The results indicate that this real-time PCR method targeting the atpE gene can serve for highly specific detection and precise quantification of Mycobacterium spp. in environmental samples.
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Affiliation(s)
- Nicolas Radomski
- Laboratoire Eau Environnement Systèmes Urbains (Leesu) UMR MA 102-AgroParisTech, Université Paris-Est, 6-8 avenue Blaise Pascal Cité, Descartes, FR 77455, Champs sur Marne, France.
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Appana G, Das D, Veerasami M, Senthilkumar RL, Durishetty M, Ramalakshmi B, Bahekar V, Mukherjee F, Chandran D, Kumar PU, Sesikeran B, Srinivasan VA. Antemortem and postmortem examinations of the cattle calf naturally infected with Mycobacterium avium subsp. paratuberculosis. Eur J Microbiol Immunol (Bp) 2013; 3:241-51. [PMID: 24294493 DOI: 10.1556/eujmi.3.2013.4.2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2013] [Revised: 08/19/2013] [Accepted: 08/19/2013] [Indexed: 11/19/2022] Open
Abstract
A male cattle calf was detected as subclinically and naturally infected with Mycobacterium avium subspecies paratuberculosis (MAP) by a series of antemortem and postmortem tests. The MAP infection was identified by strong antibody and cell-mediated immune (CMI) response by a commercial ELISA kit and an intradermal Johnin test, respectively, in the initial antemortem examination. The antemortem status of the calf was further confirmed by MAP-specific interferon gamma (IFN-γ) response. For detection of IFN-γ response, MAP-specific IFN-γ release assays (IGRAs): (a) immuno capture ELISA (IC-ELISA) and (b) ELISPOT was employed. In addition, the presence of intracellular cytokine IFN-γ was detected by flow cytometry. For all cytokine assays, MAP-specific recombinant antigens HSP65 and 35 kDa were employed to overcome the poor sensitivity and specificity resulting from the use of Johnin, the crude protein purified derivative of MAP. Postmortem examination of the MAP-infected/suspected cattle calf did not reveal any pathognomonic gross lesions in the gastro-intestinal tract. Histopathological examination of multiple organs showed the presence of epithelioid cells/macrophages and edematous lesions in the mesenteric lymph nodes suggestive of MAP; however, no granulomas were observed in the intestinal tract. The necropsy samples of rectum and mesenteric lymph nodes were positive for isolation of MAP by culture in the BACTEC™ MGIT™ 960 system, and acid fast bacilli were demonstrated by fluorescence microscopy confirming the infection. Due to differential and complex expression patterns of MAP antigens reported in literature, a combination of assays such as those based on IGRAs and antibody detection is essential. Therefore, the current experimental evidence confirms the efficacy of the approach adopted. However, further studies will be needed to understand the optimal combination MAP-specific antigens for use in IGRAs or antibody assays that can be used for detecting MAP infection in every stage of the disease.
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Statistical Evaluation of Two Microbiological Diagnostic Methods of Pulmonary Tuberculosis After Implementation of a Directly Observed Treatment Short-course Program. Osong Public Health Res Perspect 2013; 4:45-51. [PMID: 24159529 PMCID: PMC3747680 DOI: 10.1016/j.phrp.2012.12.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2012] [Revised: 12/18/2012] [Accepted: 12/19/2012] [Indexed: 11/21/2022] Open
Abstract
OBJECTIVES To evaluate the diagnostic accuracy of smear and culture tests of clinical samples of pulmonary tuberculosis after the introduction of the directly observed treatment short-course (DOTS) program. METHODS Using sputum samples from 572 individuals as a self-selected population, both Ziehl-Neelsen staining and culturing on Lowenstein-Jensen medium were carried out as diagnostic procedures. Using Bayes' rule, the obtained data set was analyzed. RESULTS Of the 572 samples, 33 (0.05769) were true positive (results of both tests positive) cases; 22 samples (0.03846) were false positive (smear test positive and culture test negative) cases; 62 samples (0.10839) were false negative (smear test negative and culture test positive) cases; and 455 samples (0.79545) were true negative (results of both tests negative) cases. Values of test statistics, sensitivity, and specificity were used to compute several inherent other Bayesian test statistics. The a priori probability or prevalence value of tuberculosis in the targeted population was 0.166. The a posteriori probability value computed arithmetically was 0.6614 and that obtained by the graphical method was 0.62. CONCLUSIONS The smear test was found to be dependable for 95.4% with stable TB infections, and it was not dependable for 34.7% without stable TB infections. The culture test could be regarded as the gold standard for 96.15% as seen with the data set, which was obtained after the implementation of the DOTS program.
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Radia D, Bond K, Limon G, van Winden S, Guitian J. Relationship between periparturient management, prevalence of MAP and preventable economic losses in UK dairy herds. Vet Rec 2013; 173:343. [DOI: 10.1136/vr.101408] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- D. Radia
- Department of Veterinary Clinical Sciences; Veterinary Epidemiology and Public Health Group. The Royal Veterinary College; Hawkshead Lane North Mymms Hatfield AL9 7TA UK
| | - K. Bond
- Department of Veterinary Clinical Sciences; Veterinary Epidemiology and Public Health Group. The Royal Veterinary College; Hawkshead Lane North Mymms Hatfield AL9 7TA UK
- DairyCo; Agriculture & Horticulture Development Board, Stoneleigh Park Kenilworth Warwickshire CV8 2TL UK
| | - G. Limon
- Department of Veterinary Clinical Sciences; Veterinary Epidemiology and Public Health Group. The Royal Veterinary College; Hawkshead Lane North Mymms Hatfield AL9 7TA UK
| | - S. van Winden
- Department of Veterinary Clinical Sciences; Veterinary Epidemiology and Public Health Group. The Royal Veterinary College; Hawkshead Lane North Mymms Hatfield AL9 7TA UK
| | - J. Guitian
- Department of Veterinary Clinical Sciences; Veterinary Epidemiology and Public Health Group. The Royal Veterinary College; Hawkshead Lane North Mymms Hatfield AL9 7TA UK
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Relationship between presence of cows with milk positive for Mycobacterium avium subsp. paratuberculosis-specific antibody by enzyme-linked immunosorbent assay and viable M. avium subsp. paratuberculosis in dust in cattle barns. Appl Environ Microbiol 2013; 79:5458-64. [PMID: 23793639 DOI: 10.1128/aem.01187-13] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Paratuberculosis, or Johne's disease, in cattle is caused by Mycobacterium avium subsp. paratuberculosis, which has recently been suspected to be transmitted through dust. This longitudinal study on eight commercial M. avium subsp. paratuberculosis-positive dairy farms studied the relationship between the number of cows with M. avium subsp. paratuberculosis antibody-positive milk and the presence of viable M. avium subsp. paratuberculosis in settled-dust samples, including their temporal relationship. Milk and dust samples were collected in parallel monthly for 2 years. M. avium subsp. paratuberculosis antibodies in milk were measured by enzyme-linked immunosorbent assay (ELISA) and used as a proxy for M. avium subsp. paratuberculosis shedding. Settled-dust samples were collected by using electrostatic dust collectors (EDCs) at six locations in housing for dairy cattle and young stock. The presence of viable M. avium subsp. paratuberculosis was identified by liquid culture and PCR. The results showed a positive relationship (odds ratio [OR], 1.2) between the number of cows with ELISA-positive milk and the odds of having positive EDCs in the same airspace as the adult dairy cattle. Moreover, the total number of lactating cows also showed an OR slightly above 1. This relationship remained the same for settled-dust samples collected up to 2 months before or after the time of milk sampling. The results suggest that removal of adult cows with milk positive for M. avium subsp. paratuberculosis-specific antibody by ELISA might result in a decrease in the presence of viable M. avium subsp. paratuberculosis in dust and therefore in the environment. However, this decrease is likely delayed by several weeks at least. In addition, the data support the notion that M. avium subsp. paratuberculosis exposure of young stock is reduced by separate housing.
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Detection of Mycobacterium avium subspecies paratuberculosis by IS900-based PCR assays from an alpaca (Vicugna pacos) kept in a German zoological garden. J Zoo Wildl Med 2013; 44:176-80. [PMID: 23505723 DOI: 10.1638/1042-7260-44.1.176] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An alpaca (Vicugna pacos) bred and kept in a German zoological garden exhibited clinical signs consistent with paratuberculosis. The presence of Mycobacterium avium ssp. paratuberculosis (MAP) was confirmed in feces and in the ileocecal lymph node (ILN) by IS900-based polymerase chain reaction (PCR) assays and culture. A bacterial burden of 7.6 x 10(6) MAP/g in feces and 4.4 x 10(7) MAP/g in lymph node tissue was determined by real-time PCR. For further characterization, a conventional PCR was developed. After sequencing of the 864-bp PCR amplicon covering nucleotide positions 13 to 876 within the IS900, the alpaca isolate shared 100% nucleotide homology with the bovine MAP-K10 IS900 reference sequence (GenBank: AE16958), indicating a cattle strain. This report supports the present occurrence of MAP in German camelid populations and highlights the need to expand routine MAP surveillance to South American camelids held in European zoos.
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Schwarz D, Carvalho I, Pietralonga P, Faria A, Moreira M. Paratuberculose em pequenos ruminantes domésticos. ARQUIVOS DO INSTITUTO BIOLÓGICO 2012. [DOI: 10.1590/s1808-16572012000300019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Mycobacterium avium subesp. paratuberculosis (MAP) é o agente etiológico da paratuberculose em ruminantes domésticos e silvestres. Em caprinos e ovinos causa uma enterite granulomatosa crônica com emagrecimento progressivo seguido de morte, raramente a diarreia é observada. Nesse aspecto, a doença é considerada uma ameaça mundial aos rebanhos, pois pode permanecer no estádio subclínico por anos, manifestando perdas indiretas na produção animal e na disseminação do agente. Além disso, existem relatos da possível relação de MAP com a doença de Crohn, determinando, assim, a sua relevância na saúde pública. O Brasil não dispõe de dados quantificando as reais perdas produtivas nos rebanhos acometidos pela doença, e poucas informações do comprometimento de caprinos e ovinos no país são relatadas. Assim, este artigo busca revisar a paratuberculose em pequenos ruminantes domésticos.
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Opportunities for improved serodiagnosis of human tuberculosis, bovine tuberculosis, and paratuberculosis. Vet Med Int 2012; 2012:674238. [PMID: 22720192 PMCID: PMC3375143 DOI: 10.1155/2012/674238] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2012] [Accepted: 04/02/2012] [Indexed: 11/21/2022] Open
Abstract
Mycobacterial infections—tuberculosis (TB), bovine tuberculosis (bTB), and Johne's disease (JD)—are major infectious diseases of both human and animals. Methods presently in use for diagnosis of mycobacterial infections include bacterial culture, nucleic acid amplification, tuberculin skin test, interferon-γ assay, and serology. Serological tests have several advantages over other methods, including short turn-around time, relatively simple procedures, and low cost. However, current serodiagnostic methods for TB, bTB and JD exhibit low sensitivity and/or specificity. Recent studies that have aimed to develop improved serodiagnostic tests have mostly focused on identifying useful species-specific protein antigens. A review of recent attempts to improve diagnostic test performance indicates that the use of multiple antigens can improve the accuracy of serodiagnosis of these mycobacterial diseases. Mycobacteria also produce a variety of species-specific nonprotein molecules; however, only a few such molecules (e.g., cord factor and lipoarabinomannan) have so far been evaluated for their effectiveness as diagnostic antigens. For TB and bTB, there has been recent progress in developing laboratory-free diagnostic methods. New technologies such as microfluidics and “Lab-on-Chip” are examples of promising new technologies that can underpin development of laboratory-free diagnostic devices for these mycobacterial infections.
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Münster P, Völkel I, Wemheuer W, Schwarz D, Döring S, Czerny CP. A longitudinal study to characterize the distribution patterns of Mycobacterium avium ssp. paratuberculosis in semen, blood and faeces of a naturally infected bull by IS 900 semi-nested and quantitative real-time PCR. Transbound Emerg Dis 2012; 60:175-87. [PMID: 22571476 DOI: 10.1111/j.1865-1682.2012.01336.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Johne's disease is caused by Mycobacterium avium ssp. paratuberculosis (MAP) and has been recognized as an important bacterial infection in ruminants. Although MAP has been detected in semen and within the reproductive organs of bulls, the bacterial distribution and shedding patterns are currently not well characterized. Our investigation was performed to detect and quantify MAP in faeces, semen and blood samples repeatedly drawn from a naturally infected but asymptomatic 18-month-old German Simmental breeding bull candidate over a period of 3 years (June 2007-November 2010). Qualitative and quantitative polymerase chain reaction (PCR) techniques were used to correlate the presence and matrix-specific amounts of MAP. In total, 65 sampling dates were selected. Mycobacterium avium ssp. paratuberculosis was detected intermittently in all matrices with MAP-free intervals of up to 18 weeks by an IS900 semi-nested PCR. The number of MAP-positive results from semen and blood samples was higher than from faecal samples. A quantitative polymerase chain reaction detected the highest MAP contents in faeces (10(3) -10(6) MAP/g), while lower amounts were found in semen and blood samples (10(2) -10(5) MAP/ml). Although no significant agreement was calculated between the presence of MAP in faeces and blood, a statistically significant positive correlation between its occurrence in semen and blood was determined (r = 0.38, P < 0.05, n = 29). The present study contributes to a more detailed understanding of MAP distribution patterns in faeces, semen and blood of a subclinically infected breeding bull candidate. It highlights the possible role of breeding bulls as a source of MAP transmission and indicates the need for further monitoring and hygienic measures to prevent the spread of the infection via semen.
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Affiliation(s)
- P Münster
- Department of Animal Sciences, Institute of Veterinary Medicine, Division of Microbiology and Animal Hygiene, Faculty of Agricultural Sciences, Georg-August-University, Burckhardtweg, Göttingen, Germany
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