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Taylor EN, Beckmann M, Villarreal-Ramos B, Vordermeier HM, Hewinson G, Rooke D, Mur LAJ, Koets AP. Metabolomic Changes in Naturally MAP-Infected Holstein-Friesian Heifers Indicate Immunologically Related Biochemical Reprogramming. Metabolites 2021; 11:metabo11110727. [PMID: 34822384 PMCID: PMC8625860 DOI: 10.3390/metabo11110727] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 10/04/2021] [Accepted: 10/21/2021] [Indexed: 11/28/2022] Open
Abstract
Johne’s disease, caused by Mycobacterium avium subsp. paratuberculosis (MAP), causes weight loss, diarrhoea, and reduced milk yields in clinically infected cattle. Asymptomatic, subclinically infected cattle shed MAP bacteria but are frequently not detected by diagnostic tests. Herein, we compare the metabolite profiles of sera from subclinically infected Holstein–Friesian heifers and antibody binding to selected MAP antigens. The study used biobanked serum samples from 10 naturally MAP-infected and 10 control heifers, sampled monthly from ~1 to 19 months of age. Sera were assessed using flow infusion electrospray–high-resolution mass spectrometry (FIE–HRMS) on a Q Exactive hybrid quadrupole–Orbitrap mass spectrometer for high-throughput, sensitive, non-targeted metabolite fingerprinting. Partial least-squares discriminant analyses (PLS-DA) and hierarchical cluster analysis (HCA) of the data discriminated between naturally MAP-infected and control heifers. In total, 33 metabolites that differentially accumulated in naturally MAP-infected heifers compared to controls were identified. Five were significantly elevated within MAP-infected heifers throughout the study, i.e., leukotriene B4, bicyclo prostaglandin E2 (bicyclo PGE2), itaconic acid, 2-hydroxyglutaric acid and N6-acetyl-L-lysine. These findings highlight the potential of metabolomics in the identification of novel MAP diagnostic markers and particular biochemical pathways, which may provide insights into the bovine immune response to MAP.
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Affiliation(s)
- Emma N. Taylor
- Institute of Biological, Environmental and Rural Sciences (IBERS), Aberystwyth University, Ceredigion SY23 3DA, UK; (E.N.T.); (M.B.); (B.V.-R.); (H.-M.V.); (G.H.)
| | - Manfred Beckmann
- Institute of Biological, Environmental and Rural Sciences (IBERS), Aberystwyth University, Ceredigion SY23 3DA, UK; (E.N.T.); (M.B.); (B.V.-R.); (H.-M.V.); (G.H.)
| | - Bernardo Villarreal-Ramos
- Institute of Biological, Environmental and Rural Sciences (IBERS), Aberystwyth University, Ceredigion SY23 3DA, UK; (E.N.T.); (M.B.); (B.V.-R.); (H.-M.V.); (G.H.)
- Centre of Excellence for Bovine Tuberculosis, Aberystwyth University, Ceredigion SY23 3DA, UK
- Animal and Plant Health Agency, Weybridge, Surrey KT15 3NB, UK
| | - Hans-Martin Vordermeier
- Institute of Biological, Environmental and Rural Sciences (IBERS), Aberystwyth University, Ceredigion SY23 3DA, UK; (E.N.T.); (M.B.); (B.V.-R.); (H.-M.V.); (G.H.)
- Centre of Excellence for Bovine Tuberculosis, Aberystwyth University, Ceredigion SY23 3DA, UK
- Animal and Plant Health Agency, Weybridge, Surrey KT15 3NB, UK
| | - Glyn Hewinson
- Institute of Biological, Environmental and Rural Sciences (IBERS), Aberystwyth University, Ceredigion SY23 3DA, UK; (E.N.T.); (M.B.); (B.V.-R.); (H.-M.V.); (G.H.)
- Centre of Excellence for Bovine Tuberculosis, Aberystwyth University, Ceredigion SY23 3DA, UK
| | - David Rooke
- ProTEM Services Ltd., Horsham, West Sussex RH12 4BD, UK;
| | - Luis A. J. Mur
- Institute of Biological, Environmental and Rural Sciences (IBERS), Aberystwyth University, Ceredigion SY23 3DA, UK; (E.N.T.); (M.B.); (B.V.-R.); (H.-M.V.); (G.H.)
- Correspondence: (L.A.J.M.); (A.P.K.)
| | - Ad P. Koets
- Wageningen Bioveterinary Research, 8221 RA Lelystad, The Netherlands
- Population Health Systems, Faculty of Veterinary Medicine, Utrecht University, 3584 CS Utrecht, The Netherlands
- Correspondence: (L.A.J.M.); (A.P.K.)
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2
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Zhao X, Zeng X, Dai Q, Hou Y, Zhu D, Wang M, Jia R, Chen S, Liu M, Yang Q, Wu Y, Zhang S, Huang J, Ou X, Mao S, Gao Q, Zhang L, Liu Y, Yu Y, Cheng A. Immunogenicity and protection efficacy of a Salmonella enterica serovar Typhimurium fnr, arcA and fliC mutant. Vaccine 2020; 39:588-595. [PMID: 33341307 DOI: 10.1016/j.vaccine.2020.12.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 11/05/2020] [Accepted: 12/01/2020] [Indexed: 01/17/2023]
Abstract
Salmonella enterica serovar Typhimurium is a major food-borne pathogen that can cause self-limited gastroenteritis or life-threatening invasive diseases in humans. There is no licensed S. Typhimurium vaccine for humans to date. In this study, we attempted to construct a live attenuated vaccine strain of S. Typhimurium based on three genes, namely, the two global regulator genes fnr and arcA and the flagellin subunit gene fliC. The S. Typhimurium three-gene mutant, named SLT39 (ΔfnrΔarcAΔfliC), exhibited a high level of attenuation with a colonization defect in mouse tissues and approximately 104-fold decreased virulence compared with that of the wild-type strain. To evaluate the immunogenicity and protection efficacy of STL39, mice were inoculated twice with a dose of 107 CFU or 108 CFU at a 28-day interval, and the immunized mice were challenged with a lethal dose of the wild-type S. Typhimurium strain one month post second immunization. Compared with mock immunization, SLT39 immunization with either dose elicited significant serum total IgG, IgG1 and IgG2a and faecal IgA responses against inactivated S. Typhimurium antigens at a comparable level post second immunization, whereas the 108 CFU group induced higher levels of duodenal and caecal IgA than the 107 CFU group. Furthermore, the bacterial loads in mouse tissues, including Peyer's patches, spleen and liver, significantly decreased in the two SLT39 immunization groups compared to those in the control group post challenge. Additionally, all mice in the SLT39 (108 CFU) group and 80% of the mice in the SLT39 (107 CFU) group survived the lethal challenge, suggesting full protection and 80% protection efficacy, respectively. Thus, the S. Typhimurium fnr, arcA and fliC mutant proved to be a potential attenuated live vaccine candidate for prevention of homologous infection.
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Affiliation(s)
- Xinxin Zhao
- Research Center of Avian Diseases, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, Sichuan, China; Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Xiaoli Zeng
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Qinlong Dai
- Liziping National Nature Reserve, Shimian, Sichuan, China
| | - Yulong Hou
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Dekang Zhu
- Research Center of Avian Diseases, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, Sichuan, China; Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Mingshu Wang
- Research Center of Avian Diseases, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, Sichuan, China; Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Renyong Jia
- Research Center of Avian Diseases, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, Sichuan, China; Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Shun Chen
- Research Center of Avian Diseases, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, Sichuan, China; Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Mafeng Liu
- Research Center of Avian Diseases, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, Sichuan, China; Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Qiao Yang
- Research Center of Avian Diseases, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, Sichuan, China; Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Ying Wu
- Research Center of Avian Diseases, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, Sichuan, China; Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Shaqiu Zhang
- Research Center of Avian Diseases, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, Sichuan, China; Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Juan Huang
- Research Center of Avian Diseases, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, Sichuan, China; Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Xumin Ou
- Research Center of Avian Diseases, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, Sichuan, China; Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Sai Mao
- Research Center of Avian Diseases, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, Sichuan, China; Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Qun Gao
- Research Center of Avian Diseases, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, Sichuan, China; Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Ling Zhang
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, Sichuan, China; Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Yunya Liu
- Research Center of Avian Diseases, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, Sichuan, China; Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Yanling Yu
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, Sichuan, China; Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Anchun Cheng
- Research Center of Avian Diseases, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, Sichuan, China; Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, China.
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3
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Facciuolo A, Lee AH, Trimble MJ, Rawlyk N, Townsend HGG, Bains M, Arsic N, Mutharia LM, Potter A, Gerdts V, Napper S, Hancock REW, Griebel PJ. A Bovine Enteric Mycobacterium Infection Model to Analyze Parenteral Vaccine-Induced Mucosal Immunity and Accelerate Vaccine Discovery. Front Immunol 2020; 11:586659. [PMID: 33329565 PMCID: PMC7719698 DOI: 10.3389/fimmu.2020.586659] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 10/26/2020] [Indexed: 11/30/2022] Open
Abstract
Mycobacterial diseases of cattle are responsible for considerable production losses worldwide. In addition to their importance in animals, these infections offer a nuanced approach to understanding persistent mycobacterial infection in native host species. Mycobacteriumavium ssp. paratuberculosis (MAP) is an enteric pathogen that establishes a persistent, asymptomatic infection in the small intestine. Difficulty in reproducing infection in surrogate animal models and limited understanding of mucosal immune responses that control enteric infection in the natural host have been major barriers to MAP vaccine development. We previously developed a reproducible challenge model to establish a consistent MAP infection using surgically isolated intestinal segments prepared in neonatal calves. In the current study, we evaluated whether intestinal segments could be used to screen parenteral vaccines that alter mucosal immune responses to MAP infection. Using Silirum® – a commercial MAP bacterin – we demonstrate that intestinal segments provide a platform for assessing vaccine efficacy within a relatively rapid period of 28 days post-infection. Significant differences between vaccinates and non-vaccinates could be detected using quantitative metrics including bacterial burden in intestinal tissue, MAP shedding into the intestinal lumen, and vaccine-induced mucosal immune responses. Comparing vaccine-induced responses in mucosal leukocytes isolated from the site of enteric infection versus blood leukocytes revealed substantial inconsistences between these immune compartments. Moreover, parenteral vaccination with Silirum did not induce equal levels of protection throughout the small intestine. Significant control of MAP infection was observed in the continuous but not the discrete Peyer’s patches. Analysis of these regional mucosal immune responses revealed novel correlates of immune protection associated with reduced infection that included an increased frequency of CD335+ innate lymphoid cells, and increased expression of IL21 and IL27. Thus, intestinal segments provide a novel model to accelerate vaccine screening and discovery by testing vaccines directly in the natural host and provides a unique opportunity to interrogate mucosal immune responses to mycobacterial infections.
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Affiliation(s)
- Antonio Facciuolo
- Vaccine and Infectious Disease Organization-International Vaccine Centre (VIDO-InterVac), University of Saskatchewan, Saskatoon, SK, Canada
| | - Amy H Lee
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, BC, Canada.,Centre for Microbial Diseases and Immunity Research, Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC, Canada
| | - Michael J Trimble
- Centre for Microbial Diseases and Immunity Research, Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC, Canada
| | - Neil Rawlyk
- Vaccine and Infectious Disease Organization-International Vaccine Centre (VIDO-InterVac), University of Saskatchewan, Saskatoon, SK, Canada
| | - Hugh G G Townsend
- Vaccine and Infectious Disease Organization-International Vaccine Centre (VIDO-InterVac), University of Saskatchewan, Saskatoon, SK, Canada
| | - Manjeet Bains
- Centre for Microbial Diseases and Immunity Research, Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC, Canada
| | - Natasa Arsic
- Vaccine and Infectious Disease Organization-International Vaccine Centre (VIDO-InterVac), University of Saskatchewan, Saskatoon, SK, Canada
| | - Lucy M Mutharia
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, ON, Canada
| | - Andrew Potter
- Vaccine and Infectious Disease Organization-International Vaccine Centre (VIDO-InterVac), University of Saskatchewan, Saskatoon, SK, Canada
| | - Volker Gerdts
- Vaccine and Infectious Disease Organization-International Vaccine Centre (VIDO-InterVac), University of Saskatchewan, Saskatoon, SK, Canada
| | - Scott Napper
- Vaccine and Infectious Disease Organization-International Vaccine Centre (VIDO-InterVac), University of Saskatchewan, Saskatoon, SK, Canada.,Department of Biochemistry, Microbiology, and Immunology, University of Saskatchewan, Saskatoon, SK, Canada
| | - Robert E W Hancock
- Centre for Microbial Diseases and Immunity Research, Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC, Canada
| | - Philip J Griebel
- Vaccine and Infectious Disease Organization-International Vaccine Centre (VIDO-InterVac), University of Saskatchewan, Saskatoon, SK, Canada.,School of Public Health, University of Saskatchewan, Saskatoon, SK, Canada
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4
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Facciuolo A, Lee AH, Gonzalez Cano P, Townsend HGG, Falsafi R, Gerdts V, Potter A, Napper S, Hancock REW, Mutharia LM, Griebel PJ. Regional Dichotomy in Enteric Mucosal Immune Responses to a Persistent Mycobacterium avium ssp. paratuberculosis Infection. Front Immunol 2020; 11:1020. [PMID: 32547548 PMCID: PMC7272674 DOI: 10.3389/fimmu.2020.01020] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Accepted: 04/28/2020] [Indexed: 12/24/2022] Open
Abstract
Chronic enteric Mycobacterium avium ssp. paratuberculosis (MAP) infections are endemic in ruminants globally resulting in significant production losses. The mucosal immune responses occurring at the site of infection, specifically in Peyer's patches (PP), are not well-understood. The ruminant small intestine possesses two functionally distinct PPs. Discrete PPs function as mucosal immune induction sites and a single continuous PP, in the terminal small intestine, functions as a primary lymphoid tissue for B cell repertoire diversification. We investigated whether MAP infection of discrete vs. continuous PPs resulted in the induction of significantly different pathogen-specific immune responses and persistence of MAP infection. Surgically isolated intestinal segments in neonatal calves were used to target MAP infection to individual PPs. At 12 months post-infection, MAP persisted in continuous PP (n = 4), but was significantly reduced (p = 0.046) in discrete PP (n = 5). RNA-seq analysis revealed control of MAP infection in discrete PP was associated with extensive transcriptomic changes (1,707 differentially expressed genes) but MAP persistent in continuous PP elicited few host responses (4 differentially expressed genes). Cytokine gene expression in tissue and MAP-specific recall responses by mucosal immune cells isolated from PP, lamina propria and mesenteric lymph node revealed interleukin (IL)22 and IL27 as unique correlates of protection associated with decreased MAP infection in discrete PP. This study provides the first description of mucosal immune responses occurring in bovine discrete jejunal PPs and reveals that a significant reduction in MAP infection is associated with specific cytokine responses. Conversely, MAP infection persists in the continuous ileal PP with minimal perturbation of host immune responses. These data reveal a marked dichotomy in host-MAP interactions within the two functionally distinct PPs of the small intestine and identifies mucosal immune responses associated with the control of a mycobacterial infection in the natural host.
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Affiliation(s)
- Antonio Facciuolo
- Vaccine & Infectious Disease Organization—International Vaccine Centre, University of Saskatchewan, Saskatoon, SK, Canada
| | - Amy H. Lee
- Department of Microbiology and Immunology, Centre for Microbial Diseases and Immunity Research, University of British Columbia, Vancouver, BC, Canada
| | | | - Hugh G. G. Townsend
- Vaccine & Infectious Disease Organization—International Vaccine Centre, University of Saskatchewan, Saskatoon, SK, Canada
| | - Reza Falsafi
- Department of Microbiology and Immunology, Centre for Microbial Diseases and Immunity Research, University of British Columbia, Vancouver, BC, Canada
| | - Volker Gerdts
- Vaccine & Infectious Disease Organization—International Vaccine Centre, University of Saskatchewan, Saskatoon, SK, Canada
| | - Andrew Potter
- Vaccine & Infectious Disease Organization—International Vaccine Centre, University of Saskatchewan, Saskatoon, SK, Canada
| | - Scott Napper
- Vaccine & Infectious Disease Organization—International Vaccine Centre, University of Saskatchewan, Saskatoon, SK, Canada
- Department of Biochemistry, Microbiology and Immunology, University of Saskatchewan, Saskatoon, SK, Canada
| | - R. E. W. Hancock
- Department of Microbiology and Immunology, Centre for Microbial Diseases and Immunity Research, University of British Columbia, Vancouver, BC, Canada
| | - Lucy M. Mutharia
- Department of Molecular & Cellular Biology, University of Guelph, Guelph, ON, Canada
| | - Philip J. Griebel
- Vaccine & Infectious Disease Organization—International Vaccine Centre, University of Saskatchewan, Saskatoon, SK, Canada
- School of Public Health, University of Saskatchewan, Saskatoon, SK, Canada
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Fernández B, Colavecchia SB, Ingratta GG, Jolly A, Stempler A, Fortuny ML, Paolicchi FA, Mundo SL. Early IgG2 in calves experimentally infected with Mycobacterium avium subsp. paratuberculosis. Vet Immunol Immunopathol 2019; 213:109886. [PMID: 31307667 DOI: 10.1016/j.vetimm.2019.109886] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Revised: 06/06/2019] [Accepted: 06/24/2019] [Indexed: 11/25/2022]
Abstract
The diagnosis of the early stages of paratuberculosis, caused by Mycobacterium avium subsp. paratuberculosis (Map), is a cumbersome task. In this study, an experimental Map-infection model of calves was used to improve the knowledge of early antibody response and to evaluate different in-house ELISAs in the detection of subclinical paratuberculosis. Calves were challenged with Map strain IS900-RFLPA (n = 3) or Map strain IS900-RFLPC (n = 2) (Argentinean isolated strains) or mock infected (n = 3), and their specific humoral response was evaluated. The diagnostic ELISA (IgG against Map protoplasmic antigen; PPA) could not detect the infection throughout the experimental period (180 days post-infection; dpi), whereas the IgG2/PPA-ELISA was able to identify infected calves at least once during the experiment. In addition, the use of crude Map extract detected most of the infections from 60 dpi onwards. Antibodies were also characterized by immunoblot: IgG2-reactivity to antigens of molecular weight lower than 50 kDa was detected in all infected calves. The experimental Map-infection model of calves used allows the study of the early humoral immune response in paratuberculosis. The evaluation of IgG2 specific to antigens lighter than 50 kDa emerges as an interesting alternative in calves naturally infected with paratuberculosis.
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Affiliation(s)
- Bárbara Fernández
- Universidad de Buenos Aires, Facultad de Ciencias Veterinarias, Cátedra de Inmunología, Av. Chorroarín 280, C1427CWO, Buenos Aires, Argentina; Universidad de Buenos Aires, Facultad de Ciencias Veterinarias, Instituto de Investigación y Tecnología en Reproducción Animal (INITRA), Av. Chorroarín 280, C1427CWO, Buenos Aires, Argentina.
| | - Silvia Beatriz Colavecchia
- Universidad de Buenos Aires, Facultad de Ciencias Veterinarias, Cátedra de Inmunología, Av. Chorroarín 280, C1427CWO, Buenos Aires, Argentina.
| | - Giselle Gabriela Ingratta
- Universidad de Buenos Aires, Facultad de Ciencias Veterinarias, Cátedra de Inmunología, Av. Chorroarín 280, C1427CWO, Buenos Aires, Argentina.
| | - Ana Jolly
- Universidad de Buenos Aires, Facultad de Ciencias Veterinarias, Cátedra de Inmunología, Av. Chorroarín 280, C1427CWO, Buenos Aires, Argentina.
| | - Ana Stempler
- Universidad de Buenos Aires, Facultad de Ciencias Veterinarias, Cátedra de Inmunología, Av. Chorroarín 280, C1427CWO, Buenos Aires, Argentina.
| | - María Laura Fortuny
- Universidad de Buenos Aires, Facultad de Ciencias Veterinarias, Cátedra de Inmunología, Av. Chorroarín 280, C1427CWO, Buenos Aires, Argentina.
| | - Fernando Alberto Paolicchi
- Instituto Nacional de Tecnología Agropecuaria (INTA), Estación Experimental Agropecuaria Balcarce, Laboratorio de Bacteriología, Ruta 226, Km 73.5, Provincia de Buenos Aires, Balcarce B7620BEN, Argentina; Universidad Nacional de Mar del Plata, Facultad de Ciencias Agrarias, Departamento de Producción Animal, Mar del Plata, Ruta 226, Km 73.5, Provincia de Buenos Aires, Balcarce B7620BEN, Argentina.
| | - Silvia Leonor Mundo
- Universidad de Buenos Aires, Facultad de Ciencias Veterinarias, Cátedra de Inmunología, Av. Chorroarín 280, C1427CWO, Buenos Aires, Argentina; Universidad de Buenos Aires, Facultad de Ciencias Veterinarias, Instituto de Investigación y Tecnología en Reproducción Animal (INITRA), Av. Chorroarín 280, C1427CWO, Buenos Aires, Argentina.
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6
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Herd-level infectious disease surveillance of livestock populations using aggregate samples. Anim Health Res Rev 2018; 19:53-64. [PMID: 29779505 DOI: 10.1017/s1466252318000038] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
All sectors of livestock production are in the process of shifting from small populations on many farms to large populations on fewer farms. A concurrent shift has occurred in the number of livestock moved across political boundaries. The unintended consequence of these changes has been the appearance of multifactorial diseases that are resistant to traditional methods of prevention and control. The need to understand complex animal health conditions mandates a shift toward the collection of longitudinal animal health data. Historically, collection of such data has frustrated and challenged animal health specialists. A promising trend in the evolution toward more efficient and effective livestock disease surveillance is the increased use of aggregate samples, e.g. bulk tank milk and oral fluid specimens. These sample types provide the means to monitor disease, estimate herd prevalence, and evaluate spatiotemporal trends in disease distribution. Thus, this article provides an overview of the use of bulk tank milk and pen-based oral fluids in the surveillance of livestock populations for infectious diseases.
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7
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Begg DJ, Plain KM, de Silva K, Gurung R, Gunn A, Purdie AC, Whittington RJ. Immunopathological changes and apparent recovery from infection revealed in cattle in an experimental model of Johne's disease using a lyophilised culture of Mycobacterium avium subspecies paratuberculosis. Vet Microbiol 2018; 219:53-62. [PMID: 29778205 DOI: 10.1016/j.vetmic.2018.03.029] [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: 12/31/2017] [Revised: 03/12/2018] [Accepted: 03/29/2018] [Indexed: 01/06/2023]
Abstract
Johne's disease (JD) or paratuberculosis is an economically significant, chronic enteropathy of ruminants caused by Mycobacterium avium subspecies paratuberculosis (MAP). Experimental models of JD in cattle are logistically challenging due to the need for long term monitoring, because the clinical disease can take years to manifest. Three trials were undertaken, the largest involving 20 cattle exposed orally to a low dose of C strain MAP and 10 controls studied for 4.75 years. Frequent blood and faecal sampling was used to monitor immunological and infection parameters, and intestinal biopsies were performed at two time points during the subclinical disease phase. Although clinical disease was not seen, there was evidence of infection in 35% of the animals and at necropsy 10% had histopathological lesions consistent with JD, similar to the proportions expected in naturally infected herds. Faecal shedding occurred in two distinct phases: firstly there was intermittent shedding <∼9 months post-exposure that did not correlate with disease outcomes; secondly, in a smaller cohort of animals, this was followed by more consistent shedding of increasing quantities of MAP, associated with intestinal pathology. There was evidence of regression of histopathological lesions in the ileum of one animal, which therefore had apparently recovered from the disease. Both cattle with histopathological lesions of paratuberculosis at necropsy had low MAP-specific interferon-gamma responses at 4 months post-exposure and later had consistently shed viable MAP; they also had the highest loads of MAP DNA in faeces 4.75 year s post-exposure. In a trial using a higher dose of MAP, a higher proportion of cattle developed paratuberculosis. The information derived from these trials provides greater understanding of the changes that occur during the course of paratuberculosis in cattle.
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Affiliation(s)
- Douglas J Begg
- Farm Animal Health, Sydney School of Veterinary Science, Faculty of Science, University of Sydney, Camden, Australia
| | - Karren M Plain
- Farm Animal Health, Sydney School of Veterinary Science, Faculty of Science, University of Sydney, Camden, Australia
| | - Kumudika de Silva
- Farm Animal Health, Sydney School of Veterinary Science, Faculty of Science, University of Sydney, Camden, Australia
| | - Ratna Gurung
- Farm Animal Health, Sydney School of Veterinary Science, Faculty of Science, University of Sydney, Camden, Australia
| | - Alison Gunn
- Farm Animal Health, Sydney School of Veterinary Science, Faculty of Science, University of Sydney, Camden, Australia
| | - Auriol C Purdie
- Farm Animal Health, Sydney School of Veterinary Science, Faculty of Science, University of Sydney, Camden, Australia
| | - Richard J Whittington
- Farm Animal Health, Sydney School of Veterinary Science, Faculty of Science, University of Sydney, Camden, Australia.
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Whittington RJ, Begg DJ, de Silva K, Purdie AC, Dhand NK, Plain KM. Case definition terminology for paratuberculosis (Johne's disease). BMC Vet Res 2017; 13:328. [PMID: 29121939 PMCID: PMC5680782 DOI: 10.1186/s12917-017-1254-6] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Accepted: 10/31/2017] [Indexed: 11/24/2022] Open
Abstract
Paratuberculosis (Johne's disease) is an economically significant condition caused by Mycobacterium avium subsp. paratuberculosis. However, difficulties in diagnosis and classification of individual animals with the condition have hampered research and impeded efforts to halt its progressive spread in the global livestock industry. Descriptive terms applied to individual animals and herds such as exposed, infected, diseased, clinical, sub-clinical, infectious and resistant need to be defined so that they can be incorporated consistently into well-understood and reproducible case definitions. These allow for consistent classification of individuals in a population for the purposes of analysis based on accurate counts. The outputs might include the incidence of cases, frequency distributions of the number of cases by age class or more sophisticated analyses involving statistical comparisons of immune responses in vaccine development studies, or gene frequencies or expression data from cases and controls in genomic investigations. It is necessary to have agreed definitions in order to be able to make valid comparisons and meta-analyses of experiments conducted over time by a given researcher, in different laboratories, by different researchers, and in different countries. In this paper, terms are applied systematically in an hierarchical flow chart to enable classification of individual animals. We propose descriptive terms for different stages in the pathogenesis of paratuberculosis to enable their use in different types of studies and to enable an independent assessment of the extent to which accepted definitions for stages of disease have been applied consistently in any given study. This will assist in the general interpretation of data between studies, and will facilitate future meta-analyses.
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Affiliation(s)
- R. J. Whittington
- Sydney School of Veterinary Science and School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, 425 Werombi Road, Camden, NSW 2570 Australia
| | - D. J. Begg
- Sydney School of Veterinary Science and School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, 425 Werombi Road, Camden, NSW 2570 Australia
| | - K. de Silva
- Sydney School of Veterinary Science and School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, 425 Werombi Road, Camden, NSW 2570 Australia
| | - A. C. Purdie
- Sydney School of Veterinary Science and School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, 425 Werombi Road, Camden, NSW 2570 Australia
| | - N. K. Dhand
- Sydney School of Veterinary Science and School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, 425 Werombi Road, Camden, NSW 2570 Australia
| | - K. M. Plain
- Sydney School of Veterinary Science and School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, 425 Werombi Road, Camden, NSW 2570 Australia
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9
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Barkema HW, Orsel K, Nielsen SS, Koets AP, Rutten VPMG, Bannantine JP, Keefe GP, Kelton DF, Wells SJ, Whittington RJ, Mackintosh CG, Manning EJ, Weber MF, Heuer C, Forde TL, Ritter C, Roche S, Corbett CS, Wolf R, Griebel PJ, Kastelic JP, De Buck J. Knowledge gaps that hamper prevention and control of Mycobacterium avium subspecies paratuberculosis infection. Transbound Emerg Dis 2017; 65 Suppl 1:125-148. [PMID: 28941207 DOI: 10.1111/tbed.12723] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Indexed: 12/17/2022]
Abstract
In the last decades, many regional and country-wide control programmes for Johne's disease (JD) were developed due to associated economic losses, or because of a possible association with Crohn's disease. These control programmes were often not successful, partly because management protocols were not followed, including the introduction of infected replacement cattle, because tests to identify infected animals were unreliable, and uptake by farmers was not high enough because of a perceived low return on investment. In the absence of a cure or effective commercial vaccines, control of JD is currently primarily based on herd management strategies to avoid infection of cattle and restrict within-farm and farm-to-farm transmission. Although JD control programmes have been implemented in most developed countries, lessons learned from JD prevention and control programmes are underreported. Also, JD control programmes are typically evaluated in a limited number of herds and the duration of the study is less than 5 year, making it difficult to adequately assess the efficacy of control programmes. In this manuscript, we identify the most important gaps in knowledge hampering JD prevention and control programmes, including vaccination and diagnostics. Secondly, we discuss directions that research should take to address those knowledge gaps.
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Affiliation(s)
- H W Barkema
- Department of Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
| | - K Orsel
- Department of Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
| | - S S Nielsen
- University of Copenhagen, Copenhagen, Denmark
| | - A P Koets
- Utrecht University, Utrecht, The Netherlands.,Wageningen Bioveterinary Research, Wageningen, The Netherlands
| | - V P M G Rutten
- Utrecht University, Utrecht, The Netherlands.,Department of Veterinary Tropical Diseases, Faculty of Veterinary Science, University of Pretoria, Private Bag X04, Onderstepoort, 0110, South Africa
| | | | - G P Keefe
- University of Prince Edward Island, Charlottetown, Canada
| | | | - S J Wells
- University of Minnesota, Minneapolis, MN, USA
| | | | | | | | - M F Weber
- GD Animal Health, Deventer, The Netherlands
| | - C Heuer
- Massey University, Palmerston North, New Zealand
| | | | - C Ritter
- Department of Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
| | - S Roche
- University of Guelph, Guelph, Canada
| | - C S Corbett
- Department of Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
| | - R Wolf
- Amt der Steiermärkischen Landesregierung, Graz, Austria
| | | | - J P Kastelic
- Department of Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
| | - J De Buck
- Department of Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
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Corbett CS, De Buck J, Orsel K, Barkema HW. Fecal shedding and tissue infections demonstrate transmission of Mycobacterium avium subsp. paratuberculosis in group-housed dairy calves. Vet Res 2017; 48:27. [PMID: 28454560 PMCID: PMC5410103 DOI: 10.1186/s13567-017-0431-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Accepted: 04/07/2017] [Indexed: 12/13/2022] Open
Abstract
Current Johne’s disease control programs primarily focus on decreasing transmission of Mycobacterium avium subsp. paratuberculosis (MAP) from infectious adult cows to susceptible calves. However, potential transmission between calves is largely overlooked. The objective was to determine the extent of MAP infection in calves contact-exposed to infectious penmates. Thirty-two newborn Holstein–Friesian calves were grouped into 7 experimental groups of 4, consisting of 2 inoculated (IN) calves, and 2 contact-exposed (CE) calves, and 1 control pen with 4 non-exposed calves. Calves were group housed for 3 months, with fecal samples were collected 3 times per week, blood and environmental samples weekly, and tissue samples at the end of the trial. The IN calves exited the trial after 3 months of group housing, whereas CE calves were individually housed for an additional 3 months before euthanasia. Control calves were group-housed for the entire trial. All CE and IN calves had MAP-positive fecal samples during the period of group housing; however, fecal shedding had ceased at time of individual housing. All IN calves had MAP-positive tissue samples at necropsy, and 7 (50%) of the CE had positive tissue samples. None of the calves had a humoral immune response, whereas INF-γ responses were detected in all IN calves and 5 (36%) CE calves. In conclusion, new MAP infections occurred due to exposure of infectious penmates to contact calves. Therefore, calf-to-calf transmission is a potential route of uncontrolled transmission on cattle farms.
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Affiliation(s)
- Caroline S Corbett
- Department of Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
| | - Jeroen De Buck
- Department of Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
| | - Karin Orsel
- Department of Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
| | - Herman W Barkema
- Department of Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada.
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11
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Ponce Barraza E, Cárdenas Reyna T, Angulo C, Herrera Ramírez JC, López GV, Medina-Basulto GE, Eda S, Hori-Oshima S. Evaluation of two in-house immunoenzymatic tests to serodiagnose subclinical paratuberculisis in a sheep flock in Mexicali valley, Mexico. J Immunoassay Immunochem 2017; 38:420-429. [PMID: 28422564 DOI: 10.1080/15321819.2017.1319862] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Paratuberculosis (PTB) or Johne's disease is a common ruminant infectious disease caused by Mycobacterium avium subsp. paratuberculosis (MAP). In this study, two MAP antigens were compared for their diagnostic utility to detect subclinical PTB in a sheep flock in Mexicali, Mexico. Sheep (n = 31) without clinical signs but positive on a direct fecal-polymerase chain reaction were tested with two preabsorbed in-house enzyme linked immunosorbent assays (ELISAs) using: (1) an ethanol-extracted surface lipid antigen (EVELISA) and (2) a protoplasmic antigen (ELISA-PPA). Sensitivities of the EVELISA and ELISA-PPA were 84% (95% CI; 66-95%) and 29% (95% CI; 14-48%), respectively. The EVELISA test could be a fast and effective way to identify subclinical ovine PTB for severely affected flocks.
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Affiliation(s)
- Elizama Ponce Barraza
- a Instituto de Investigaciones en Ciencias Veterinarias , Universidad Autónoma de Baja California , Mexicali Baja California , Mexico
| | - Tomás Cárdenas Reyna
- a Instituto de Investigaciones en Ciencias Veterinarias , Universidad Autónoma de Baja California , Mexicali Baja California , Mexico
| | - Carlos Angulo
- b Immunology & Vaccinology Group , Centro de Investigaciones Biológicas en Noroeste , La Paz , México
| | - José Carlomán Herrera Ramírez
- a Instituto de Investigaciones en Ciencias Veterinarias , Universidad Autónoma de Baja California , Mexicali Baja California , Mexico
| | - Gilberto V López
- a Instituto de Investigaciones en Ciencias Veterinarias , Universidad Autónoma de Baja California , Mexicali Baja California , Mexico
| | - Gerardo Enrique Medina-Basulto
- a Instituto de Investigaciones en Ciencias Veterinarias , Universidad Autónoma de Baja California , Mexicali Baja California , Mexico
| | - Shigetoshi Eda
- c Department of Forestry, Wildlife and Fisheries, Center for Wildlife Health , The University of Tennessee , Knoxville , Tennessee
| | - Sawako Hori-Oshima
- a Instituto de Investigaciones en Ciencias Veterinarias , Universidad Autónoma de Baja California , Mexicali Baja California , Mexico
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12
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Truyers I, Jennings A. Management and control of Johne's disease in beef suckler herds. IN PRACTICE 2016. [DOI: 10.1136/inp.i3394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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13
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Marked Differences in Mucosal Immune Responses Induced in Ileal versus Jejunal Peyer's Patches to Mycobacterium avium subsp. paratuberculosis Secreted Proteins following Targeted Enteric Infection in Young Calves. PLoS One 2016; 11:e0158747. [PMID: 27387969 PMCID: PMC4936678 DOI: 10.1371/journal.pone.0158747] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Accepted: 06/21/2016] [Indexed: 12/16/2022] Open
Abstract
In cattle, Mycobacterium avium subsp. paratuberculosis infection is primarily mediated through M cells overlying Peyer's patches (PP) in the ileum. The capacity of M. avium subsp. paratuberculosis to invade ileal PP (IPP) versus discrete PP in the jejunum (JPP) and subsequent differences in mucosal immune responses were investigated. Intestinal segments were surgically prepared in both mid-jejunum, containing two JPPs, and in terminal small intestine containing continuous IPP. M. avium subsp. paratuberculosis (109 CFU) was injected into the lumen of half of each intestinal segment when calves were 10-14 days-old and infection confirmed 1-2 months later by PCR and immunohistochemistry. Thirteen recombinant M. avium subsp. paratuberculosis proteins, previously identified as immunogenic, were used to analyze pathogen-specific B- and T-cell responses in PP and mesenteric lymph nodes. IgA plasma cell responses to 9 of 13 recombinant proteins were detected in JPP but not in IPP. Secretory IgA reacting in ELISA with 9 of the 13 recombinant proteins was detected in luminal contents from both jejunal and ileal segments. These observations support the conclusion that pathogen-specific IgA B cells were induced in JPP but not IPP early after a primary infection. The presence of secretory IgA in intestinal contents is consistent with dissemination of IgA plasma cells from the identified mucosa-associated immune induction sites. This is the first direct evidence for M. avium subsp. paratuberculosis uptake by bovine JPP and for local induction of pathogen-specific IgA plasma cell responses after enteric infection. We also provide evidence that bacterial invasion of IPP, a primary B lymphoid tissue, provides a novel strategy to evade induction of mucosal immune responses. Over 60% of PPs in the newborn calf small intestine is primary lymphoid tissue, which has significant implications when designing oral vaccines or diagnostic tests to detect early M. avium subsp. paratuberculosis infections.
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14
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Derakhshani H, De Buck J, Mortier R, Barkema HW, Krause DO, Khafipour E. The Features of Fecal and Ileal Mucosa-Associated Microbiota in Dairy Calves during Early Infection with Mycobacterium avium Subspecies paratuberculosis. Front Microbiol 2016; 7:426. [PMID: 27065983 PMCID: PMC4814471 DOI: 10.3389/fmicb.2016.00426] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Accepted: 03/16/2016] [Indexed: 02/06/2023] Open
Abstract
Current diagnostic tests for Johne's disease (JD), a chronic granulomatous inflammation of the gastrointestinal tract of ruminants caused by Mycobacterium avium subspecies paratuberculosis (MAP), lack the sensitivity to identify infected animals at early (asymptomatic) stages of the disease. The objective was to determine the pattern of MAP-associated dysbiosis of intestinal microbiota as a potential biomarker for early detection of infected cattle. To that end, genomic DNA was extracted from ileal mucosa and fecal samples collected from 28 MAP-positive and five control calves. High-throughput Illumina sequencing of the V4 hypervariable region of the 16S rRNA gene was used for community profiling of ileal mucosa-associated (MAM) or fecal microbiota. The PERMANOVA analysis of unweighted UniFrac distances revealed distinct clustering of ileal MAM (P = 0.049) and fecal microbiota (P = 0.068) in MAP-infected vs. control cattle. Microbiota profile of MAP-infected animals was further investigated by linear discriminant analysis effective size (LEfSe); several bacterial taxa within the phylum Proteobacteria were overrepresented in ileal MAM of control calves. Moreover, based on reconstructed metagenomes (PICRUSt) of ileal MAM, functional pathways associated with MAP infection were inferred. Enrichment of lysine and histidine metabolism pathways, and underrepresentation of glutathione metabolism and leucine and isoleucine degradation pathways in MAP-infected calves suggested potential contributions of ileal MAM in development of intestinal inflammation. Finally, simultaneous overrepresentation of families Planococcaceae and Paraprevotellaceae, as well as underrepresentation of genera Faecalibacterium and Akkermansia in the fecal microbiota of infected cattle, served as potential biomarker for identifying infected cattle during subclinical stages of JD. Collectively, based on compositional and functional shifts in intestinal microbiota of infected cattle, we inferred that this dynamic network of microorganisms had an active role in intestinal homeostasis.
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Affiliation(s)
- Hooman Derakhshani
- Department of Animal Science, University of Manitoba Winnipeg, MB, Canada
| | - Jeroen De Buck
- Department of Production Animal Health, University of Calgary Calgary, AB, Canada
| | - Rienske Mortier
- Department of Production Animal Health, University of Calgary Calgary, AB, Canada
| | - Herman W Barkema
- Department of Production Animal Health, University of Calgary Calgary, AB, Canada
| | - Denis O Krause
- Department of Animal Science, University of ManitobaWinnipeg, MB, Canada; Department of Medical Microbiology, University of ManitobaWinnipeg, MB, Canada
| | - Ehsan Khafipour
- Department of Animal Science, University of ManitobaWinnipeg, MB, Canada; Department of Medical Microbiology, University of ManitobaWinnipeg, MB, Canada
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15
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Wolf R, Barkema H, De Buck J, Orsel K. Factors affecting management changes on farms participating in a Johne’s disease control program. J Dairy Sci 2015; 98:7784-96. [DOI: 10.3168/jds.2015-9610] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Accepted: 07/17/2015] [Indexed: 11/19/2022]
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16
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Mortier RAR, Barkema HW, De Buck J. Susceptibility to and diagnosis of Mycobacterium avium subspecies paratuberculosis infection in dairy calves: A review. Prev Vet Med 2015; 121:189-98. [PMID: 26321657 DOI: 10.1016/j.prevetmed.2015.08.011] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Revised: 07/31/2015] [Accepted: 08/18/2015] [Indexed: 12/18/2022]
Abstract
The primary objectives of paratuberculosis control programs are reducing exposure of calves to Mycobacterium avium subspecies paratuberculosis (MAP), reducing herd infection pressure and regular testing of cattle >36 months of age. Although control programs based on these principles have reduced prevalence of MAP infection in dairy herds, they have generally not eliminated the infection. Recent infection trial(s) have yielded new knowledge regarding diagnostic testing and age- and dose-dependent susceptibility to MAP infection. Calves up to 1 year of age are still susceptible to MAP infection; therefore, control programs should refrain from referring to specific ages with respect to susceptibility and prevention of new infections. Notwithstanding, lesions were more severe when calves were inoculated at 2 weeks versus 1 year of age. Furthermore, a high inoculation dose resulted in more pronounced lesions than a low inoculation dose, especially in young calves. Consequently, keeping infection pressure low should decrease the incidence of new MAP infections and severity of JD in cattle that do acquire the infection. It was also evident that early diagnosis of MAP infection was possible and could improve efficacy of control programs. Although its use will still need to be validated in the field, a combination of antibody ELISA and fecal culture in young stock, in addition to testing cattle >36 months of age when screening a herd for paratuberculosis, was expected to improve detection of dairy cattle infected with MAP. Although calves were inoculated using a standardized method in a controlled environment, there were substantial differences among calves with regards to immune response, shedding and pathology. Therefore, we inferred there were genetic differences in susceptibility. Important insights were derived from experimental infection trials. Therefore, it was expected that these could improve paratuberculosis control programs by reducing severity and incidence of JD by lowering infection pressure on-farm, and reducing exposure of young calves and older cattle. Furthermore, an earlier diagnosis could be achieved by combining ELISA and fecal shedding in young stock, in addition to testing cattle >36 months of age.
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Affiliation(s)
- Rienske A R Mortier
- Department of Production Animal Health, University of Calgary, 3330 Hospital Drive NW, Calgary, AB, Canada.
| | - Herman W Barkema
- Department of Production Animal Health, University of Calgary, 3330 Hospital Drive NW, Calgary, AB, Canada.
| | - Jeroen De Buck
- Department of Production Animal Health, University of Calgary, 3330 Hospital Drive NW, Calgary, AB, Canada.
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17
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De Buck J, Shaykhutdinov R, Barkema HW, Vogel HJ. Metabolomic profiling in cattle experimentally infected with Mycobacterium avium subsp. paratuberculosis. PLoS One 2014; 9:e111872. [PMID: 25372282 PMCID: PMC4221196 DOI: 10.1371/journal.pone.0111872] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2014] [Accepted: 10/02/2014] [Indexed: 11/18/2022] Open
Abstract
The sensitivity of current diagnostics for Johne's disease, a slow, progressing enteritis in ruminants caused by Mycobacterium avium subsp. paratuberculosis (MAP), is too low to reliably detect all infected animals in the subclinical stage. The objective was to identify individual metabolites or metabolite profiles that could be used as biomarkers of early MAP infection in ruminants. In a monthly follow-up for 17 months, calves infected at 2 weeks of age were compared with aged-matched controls. Sera from all animals were analyzed by 1H nuclear magnetic resonance spectrometry. Spectra were acquired, processed, and quantified for analysis. The concentration of many metabolites changed over time in all calves, but some metabolites only changed over time in either infected or non-infected groups and the change in others was impacted by the infection. Hierarchical multivariate statistical analysis achieved best separation between groups between 300 and 400 days after infection. Therefore, a cross-sectional comparison between 1-year-old calves experimentally infected at various ages with either a high- or a low-dose and age-matched non-infected controls was performed. Orthogonal Projection to Latent Structures Discriminant Analysis (OPLS DA) yielded distinct separation of non-infected from infected cattle, regardless of dose and time (3, 6, 9 or 12 months) after infection. Receiver Operating Curves demonstrated that constructed models were high quality. Increased isobutyrate in the infected cattle was the most important agreement between the longitudinal and cross-sectional analysis. In general, high- and low-dose cattle responded similarly to infection. Differences in acetone, citrate, glycerol and iso-butyrate concentrations indicated energy shortages and increased fat metabolism in infected cattle, whereas changes in urea and several amino acids (AA), including the branched chain AA, indicated increased protein turnover. In conclusion, metabolomics was a sensitive method for detecting MAP infection much sooner than with current diagnostic methods, with individual metabolites significantly distinguishing infected from non-infected cattle.
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Affiliation(s)
- Jeroen De Buck
- Department of Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada
- * E-mail:
| | - Rustem Shaykhutdinov
- Biochemistry Research Group, Department of Biological Sciences, Faculty of Sciences, University of Calgary, Calgary, Alberta, Canada
| | - Herman W. Barkema
- Department of Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Hans J. Vogel
- Biochemistry Research Group, Department of Biological Sciences, Faculty of Sciences, University of Calgary, Calgary, Alberta, Canada
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Gene-expression profiling of calves 6 and 9 months after inoculation with Mycobacterium avium subspecies paratuberculosis. Vet Res 2014; 45:96. [PMID: 25294045 PMCID: PMC4198621 DOI: 10.1186/s13567-014-0096-5] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Accepted: 09/05/2014] [Indexed: 12/11/2022] Open
Abstract
Early detection of Johne’s disease (JD) caused by Mycobacterium avium subspecies paratuberculosis (MAP) is essential to reduce transmission; consequently, new diagnostic techniques and approaches to detect MAP or markers of early MAP infection are being explored. The objective was to identify biomarkers associated with MAP infection at 6 and 9 months after oral inoculation. Therefore, gene expression analysis was done using whole blood cells obtained from MAP-infected calves. All MAP-inoculated calves had a cell-mediated immune response (IFN-γ) to Johnin PPD specific antigens, and 60% had an antibody response to MAP antigens. Gene expression analysis at 6 months after inoculation revealed downregulation of chemoattractants, namely neutrophil beta-defensin-9 like peptide (BNBD9-Like), S100 calcium binding protein A9 (s100A9) and G protein coupled receptor 77 (GPR77) or C5a anaphylatoxin chemotactic receptor (C5a2). Furthermore, BOLA/MHC-1 intracellular antigen presentation gene was downregulated 9 months after inoculation. In parallel, qPCR experiments to evaluate the robustness of some differentially expressed genes revealed consistent downregulation of BOLA/MHC-I, BNBD9-Like and upregulation of CD46 at 3, 6, 9, 12, and 15 months after inoculation. In conclusion, measuring the expression of these genes has potential for implementation in a diagnostic tool for the early detection of MAP infection.
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19
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Mortier RAR, Barkema HW, Wilson TA, Sajobi TT, Wolf R, De Buck J. Dose-dependent interferon-gamma release in dairy calves experimentally infected with Mycobacterium avium subspecies paratuberculosis. Vet Immunol Immunopathol 2014; 161:205-10. [PMID: 25190508 DOI: 10.1016/j.vetimm.2014.08.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Revised: 08/11/2014] [Accepted: 08/12/2014] [Indexed: 10/24/2022]
Abstract
The interferon-gamma (IFN-γ) release assay is considered useful for diagnosis of subclinical paratuberculosis. However, interpretation can be subjective and complex; therefore, additional information regarding the course of the cellular immune response and effects of age and dose at infection would be helpful. Thirty-three calves were randomly allocated to 10 challenge groups and a negative control group. Calves were inoculated orally at 2 weeks or at 3, 6, 9, or 12 months of age. Within each age group, calves received either a high or low dose of Mycobacterium avium subspecies paratuberculosis (MAP). Monthly blood samples were collected, stimulated with Purified Protein Derivative (PPD) Johnin in vitro, and the subsequent release of IFN-γ measured. Calves inoculated with a high dose had earlier and stronger IFN-γ responses than low-dose calves. Furthermore, calves inoculated at 2 weeks of age produced less IFN-γ compared to those inoculated later in life. The IFN-γ response peaked (on average) 4 months after exposure; therefore, this would be an optimal interval to test cattle for MAP-infection (although the timing of field-based infections is unknown and clearance of infection a possibility). To conclude, the IFN-γ release assay could be a valuable diagnostic test on herd-level to indicate exposure to MAP.
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Affiliation(s)
- Rienske A R Mortier
- Department of Production Animal Health, University of Calgary, 3330 Hospital Drive NW, Calgary, AB, Canada T2N 4N1
| | - Herman W Barkema
- Department of Production Animal Health, University of Calgary, 3330 Hospital Drive NW, Calgary, AB, Canada T2N 4N1
| | - Todd A Wilson
- Department of Community Health Sciences, University of Calgary, 3280 Hospital Drive NW, Calgary, AB, Canada T2N 4Z6
| | - Tolulope T Sajobi
- Department of Community Health Sciences, University of Calgary, 3280 Hospital Drive NW, Calgary, AB, Canada T2N 4Z6
| | - Robert Wolf
- Department of Production Animal Health, University of Calgary, 3330 Hospital Drive NW, Calgary, AB, Canada T2N 4N1
| | - Jeroen De Buck
- Department of Production Animal Health, University of Calgary, 3330 Hospital Drive NW, Calgary, AB, Canada T2N 4N1.
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