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Harman-McKenna VK, Eshraghisamani R, Shafer N, De Buck J. Lining the small intestine with mycobacteriophages protects from Mycobacterium avium subsp. paratuberculosis and eliminates fecal shedding. Proc Natl Acad Sci U S A 2024; 121:e2318627121. [PMID: 39102547 DOI: 10.1073/pnas.2318627121] [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: 10/25/2023] [Accepted: 06/28/2024] [Indexed: 08/07/2024] Open
Abstract
Johne's disease (JD), a chronic, infectious enteritis caused by Mycobacterium avium subsp. paratuberculosis (MAP), affects wild and domestic ruminants. There is no cure or effective prevention, and current vaccines have substantial limitations, leaving this disease widespread in all substantial dairy industries causing economic, and animal welfare implications. Mycobacteriophages (MPs) have been gaining interest in recent years and are proposed as a promising solution to curtailing MAP infection. Using a well-validated infection model, we have demonstrated the preventative potential of MPs to protect dairy calves against MAP infection. Calves were supplemented daily with a phage cocktail from birth till weaning at 2 m of age and inoculated with MAP at 2 wk of age. Infection status was measured for 4.5 mo through blood, fecal, and postmortem tissue samples. Our findings highlight the remarkable efficacy of orally administered MPs. Notably, fecal shedding of MAP was entirely eliminated within 10 wk, in contrast to the infected control group where shedding continued for the entirety of the trial period. Postmortem tissue culture analysis further supported the effectiveness of MPs, with only 1 out of 6 animals in the phage-treated group testing positive for MAP colonized tissues compared to 6 out of 6 animals in the infected control group. Additionally, plaque assay results demonstrated the ability of phages to persist within the intestinal tract. Collectively, these results underscore the potential of orally administered MP cocktails as a highly effective intervention strategy to combat JD in dairy calves and by extension in the dairy industry.
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Affiliation(s)
| | | | - Natali Shafer
- Faculty of Veterinary Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Jeroen De Buck
- Faculty of Veterinary Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
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2
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Navarro León A, Muñoz M, Iglesias N, Blanco-Vázquez C, Balseiro A, Milhano Santos F, Ciordia S, Corrales FJ, Iglesias T, Casais R. Proteomic Serum Profiling of Holstein Friesian Cows with Different Pathological Forms of Bovine Paratuberculosis Reveals Changes in the Acute-Phase Response and Lipid Metabolism. J Proteome Res 2024; 23:2762-2779. [PMID: 37863471 PMCID: PMC11301775 DOI: 10.1021/acs.jproteome.3c00244] [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: 04/24/2023] [Revised: 09/18/2023] [Accepted: 09/22/2023] [Indexed: 10/22/2023]
Abstract
The lack of sensitive diagnostic methods to detect Mycobacterium avium subsp. paratuberculosis (Map) subclinical infections has hindered the control of paratuberculosis (PTB). The serum proteomic profiles of naturally infected cows presenting focal and diffuse pathological forms of PTB and negative controls (n = 4 per group) were analyzed using TMT-6plex quantitative proteomics. Focal and diffuse are the most frequent pathological forms in subclinical and clinical stages of PTB, respectively. One (focal versus (vs.) control), eight (diffuse vs. control), and four (focal vs. diffuse) differentially abundant (DA) proteins (q-value < 0.05) were identified. Ingenuity pathway analysis of the DA proteins revealed changes in the acute-phase response and lipid metabolism. Six candidate biomarkers were selected for further validation by specific ELISA using serum from animals with focal, multifocal, and diffuse PTB-associated lesions (n = 108) and controls (n = 56). Overall, the trends of the serum expression levels of the selected proteins were consistent with the proteomic results. Alpha-1-acid glycoprotein (ORM1)-based ELISA, insulin-like growth factor-binding protein 2 (IGFBP2)-based ELISA, and the anti-Map ELISA had the best diagnostic performance for detection of animals with focal, multifocal, and diffuse lesions, respectively. Our findings identify potential biomarkers that improve diagnostic sensitivity of PTB and help to elucidate the mechanisms involved in PTB pathogenesis.
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Affiliation(s)
- Alejandra
Isabel Navarro León
- Center
for Animal Biotechnology, Servicio Regional
de Investigación y Desarrollo Agroalimentario [SERIDA], 33394 Deva, Asturias, Spain
| | - Marta Muñoz
- Center
for Animal Biotechnology, Servicio Regional
de Investigación y Desarrollo Agroalimentario [SERIDA], 33394 Deva, Asturias, Spain
| | - Natalia Iglesias
- Center
for Animal Biotechnology, Servicio Regional
de Investigación y Desarrollo Agroalimentario [SERIDA], 33394 Deva, Asturias, Spain
| | - Cristina Blanco-Vázquez
- Center
for Animal Biotechnology, Servicio Regional
de Investigación y Desarrollo Agroalimentario [SERIDA], 33394 Deva, Asturias, Spain
| | - Ana Balseiro
- Departamento
de Sanidad Animal, Facultad de Veterinaria, Universidad de León, 24071 León, Spain
| | - Fátima Milhano Santos
- Functional
Proteomics Laboratory, National Center for Biotechnology, Consejo Superior de Investigaciones Científicas [CSIC],
Proteored-ISCIII, 28049 Madrid, Spain
| | - Sergio Ciordia
- Functional
Proteomics Laboratory, National Center for Biotechnology, Consejo Superior de Investigaciones Científicas [CSIC],
Proteored-ISCIII, 28049 Madrid, Spain
| | - Fernando J. Corrales
- Functional
Proteomics Laboratory, National Center for Biotechnology, Consejo Superior de Investigaciones Científicas [CSIC],
Proteored-ISCIII, 28049 Madrid, Spain
| | - Tania Iglesias
- Unidad
de Consultoría Estadística, Servicios Científico-técnicos, Universidad de Oviedo, Campus de Gijón, 33203 Gijón, Asturias, Spain
| | - Rosa Casais
- Center
for Animal Biotechnology, Servicio Regional
de Investigación y Desarrollo Agroalimentario [SERIDA], 33394 Deva, Asturias, Spain
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Tieri S, Morsella C, Méndez L, Vasini B, Garro C, Paolicchi F. Comparison of two serological diagnosis tests for bovine paratuberculosis. Vet Res Commun 2024; 48:2645-2650. [PMID: 38575801 DOI: 10.1007/s11259-024-10363-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Accepted: 03/25/2024] [Indexed: 04/06/2024]
Abstract
Mycobacterium avium subsp. paratuberculosis (MAP) is the causal agent of paratuberculosis (PTBC), a chronic infectious granulomatous enteritis of ruminants. The PTBC diagnosis with commercial ELISA has limitations in sensitivity and specificity, and its results depend on the state of progress of the disease. This research aimed to evaluate two different ELISAs: (a) an "in-house" ELISA with a sonicated antigen obtained from a MAP I47 strain, and (b) a commercial ELISA. In total, the evaluated sample consisted of 394 bovine serum samples from 12 farms in Argentina with high (5-9%) and low (≤ 0.05%) prevalence of PTBC. The evaluation of the new antigen (2.5 µg/mL) was against a 1:50 dilution of the M. phlei faced sera. The cut-off point, sensitivity, and specificity determinations of both techniques were by ROC curve analysis. The area under the curve for the I47 ELISA was 0.9 (CI 95%, 0.93-0.97). With a cut-off point of 8.8%, the sensitivity was 84.3% and the specificity 96.6%. The agreement between both techniques was 0.7 (CI 95%, 0.6-0.8). These results indicate a high discriminative capacity to differentiate positive and negative bovine sera of MAP infection with the I47 ELISA. This result would represent an advantage to dispense with the imported kit.
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Affiliation(s)
- S Tieri
- Laboratorio de Bacteriología, Producción Animal, Instituto Nacional de Tecnología Agropecuaria INTA, Balcarce, Buenos Aires, CC 276, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas CONICET, Buenos Aires, Argentina
| | - C Morsella
- Laboratorio de Bacteriología, Producción Animal, Instituto Nacional de Tecnología Agropecuaria INTA, Balcarce, Buenos Aires, CC 276, Argentina
| | - L Méndez
- Laboratorio de Bacteriología, Producción Animal, Instituto Nacional de Tecnología Agropecuaria INTA, Balcarce, Buenos Aires, CC 276, Argentina
| | - B Vasini
- University of North Texas Health Science Center, Fort Worth, TX, 76107, USA
| | - C Garro
- Instituto de Patobiología, INTA Castelar, CICVyA, Buenos Aires, Argentina
| | - Fernando Paolicchi
- Laboratorio de Bacteriología, Producción Animal, Instituto Nacional de Tecnología Agropecuaria INTA, Balcarce, Buenos Aires, CC 276, Argentina.
- Facultad de Ciencias Agrarias, Universidad Nacional de Mar del Plata, Balcarce, Buenos Aires, Argentina.
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Ottardi M, Lechner I, Wang J, Schmitt S, Schneeberger M, Schmid RM, Stephan R, Meylan M. Seroprevalence of Mycobacterium avium subsp. paratuberculosis in Swiss dairy herds and risk factors for a positive herd status and within-herd prevalence. Front Vet Sci 2024; 11:1409694. [PMID: 39005723 PMCID: PMC11242548 DOI: 10.3389/fvets.2024.1409694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2024] [Accepted: 06/18/2024] [Indexed: 07/16/2024] Open
Abstract
Introduction Bovine paratuberculosis (PTB) is a chronic enteric disease caused by Mycobacterium avium subsp. paratuberculosis (MAP). Control of PTB is important given its negative economic consequences and the potential zoonotic role of MAP in Crohn's disease in humans. Methods To determine the seroprevalence of MAP in Swiss dairy herds and to identify risk factors associated with seropositive herd status and high within-herd seroprevalence, 10,063 serum samples collected from cattle over 12 months of age in 171 Swiss dairy farms were analyzed using a commercial ELISA test. Eight herds were excluded due to non-interpretable ELISA results. Risk factors associated with seropositive herd status and high within-herd seroprevalence were investigated with regression models using results from a questionnaire on management practices possibly associated with the introduction or spread of MAP in the remaining 163 herds. Univariable logistic regression was performed, carrying forward for multivariable regression analysis when p < 0.2. Results The calculated between-herd true seroprevalence was 3.6% (95% CI, 0.96-8.4%). Due to the low within-herd seroprevalence, it was not possible to calculate the true seroprevalence at animal level; the apparent within-herd seroprevalence ranged from 2.3 to 5.5% with a median of 3.6% in nine positive farms. Herd size (p = 0.037) and the common grazing of lactating cows with cows from other herds (p = 0.014) were associated with seropositive herd status, while heifers sharing alpine pasture with dairy cattle from other herds were associated with a decreased probability of the herd to test seropositive (p = 0.042). Reliable identification of significant risk factors associated with MAP spread and high seroprevalence of PTB within seropositive herds was not possible due to low observed seroprevalence within herds and low sensitivity of the ELISA test. Discussion These results highlight the limitation of serology for MAP diagnosis in small herds with low infection prevalence.
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Affiliation(s)
- Martina Ottardi
- Clinic for Ruminants, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | | | | | - Sarah Schmitt
- Institute for Food Safety and Hygiene, Section of Veterinary Bacteriology, Vetsuisse Faculty, University of Zürich, Zürich, Switzerland
| | - Marianne Schneeberger
- Institute for Food Safety and Hygiene, Section of Veterinary Bacteriology, Vetsuisse Faculty, University of Zürich, Zürich, Switzerland
| | | | - Roger Stephan
- Institute for Food Safety and Hygiene, Section of Veterinary Bacteriology, Vetsuisse Faculty, University of Zürich, Zürich, Switzerland
| | - Mireille Meylan
- Clinic for Ruminants, Vetsuisse Faculty, University of Bern, Bern, Switzerland
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Blake R, Jensen K, Mabbott N, Hope J, Stevens J. The role of Mce proteins in Mycobacterium avium paratuberculosis infection. Sci Rep 2024; 14:14964. [PMID: 38942800 PMCID: PMC11213854 DOI: 10.1038/s41598-024-65592-2] [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: 03/19/2024] [Accepted: 06/21/2024] [Indexed: 06/30/2024] Open
Abstract
Mycobacterium avium subspecies paratuberculosis (MAP) is the causative agent of Johne's Disease, a chronic granulomatous enteritis of ruminants. MAP establishes an infection in the host via the small intestine. This requires the bacterium to adhere to, and be internalised by, cells of the intestinal tract. The effector molecules expressed by MAP for this purpose remain to be fully identified and understood. Mammalian cell entry (mce) proteins have been shown to enable other Mycobacterial species to attach to and invade host epithelial cells. Here, we have expressed Mce1A, Mce1D, Mce3C and Mce4A proteins derived from MAP on the surface of a non-invasive Escherichia coli to characterise their role in the initial interaction between MAP and the host. To this end, expression of mce1A was found to significantly increase the ability of the E. coli to attach and survive intracellularly in human monocyte-like THP-1 cells, whereas expression of mce1D was found to significantly increase attachment and invasion of E. coli to bovine epithelial cell-like MDBK cells, implying cell-type specificity. Furthermore, expression of Mce1A and Mce1D on the surface of a previously non-invasive E. coli enhanced the ability of the bacterium to infect 3D bovine basal-out enteroids. Together, our data contributes to our understanding of the effector molecules utilised by MAP in the initial interaction with the host, and may provide potential targets for therapeutic intervention.
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Affiliation(s)
- Rosemary Blake
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, UK.
| | - Kirsty Jensen
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, UK
| | - Neil Mabbott
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, UK
| | - Jayne Hope
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, UK
| | - Joanne Stevens
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, UK
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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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Griss S, Knific T, Buzzell A, Carmo LP, Schüpbach-Regula G, Meylan M, Ocepek M, Thomann B. A scoping review on associations between paratuberculosis and productivity in cattle. Front Vet Sci 2024; 11:1352623. [PMID: 38756521 PMCID: PMC11097669 DOI: 10.3389/fvets.2024.1352623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Accepted: 04/11/2024] [Indexed: 05/18/2024] Open
Abstract
Paratuberculosis (PTB), or Johne's disease, is a disease with worldwide distribution caused by Mycobacterium avium subsp. paratuberculosis (MAP) that leads to chronic enteritis, primarily in ruminants. Even subclinical infection significantly reduces the animals' performance, and consequences of the disease lead to high economic losses for the cattle industry. To estimate the economic burden of bovine PTB and to evaluate the benefits of a potential control program, accurate estimates of the production effects associated with the disease are required. Therefore, the aim of this scoping review was to provide a comprehensive overview of associations between MAP infection and production parameters in cattle. The studies were collected from three electronic databases. Of the total 1,605 identified studies, 1,432 did not meet the set criteria in the title and abstract screening and a further 106 were excluded during full-text review. Finally, data on 34 different production parameters were extracted from 67 publications. Results show that the magnitude of reported performance losses varies depending on several factors, such as the type of diagnostic test applied, disease status or number of lactations. Studies reported a reduction in milk yield, changes in milk quality (e.g., higher somatic cell count, lower amount of produced milk fat and protein), reduced fertility (e.g., prolonged calving interval and service period, higher abortion rate and calving difficulties), reduced weaning weight, slaughter weight and slaughter value, or a higher risk for mastitis. Results from the studies included in our review show a median decrease of milk yield per infected cow of -452 kg/lactation for raw and -405 kg/lactation for modeled data. Similarly, the amount of produced milk protein fell by a median of -14.41 kg/lactation for modeled data and the amount of produced milk fat by a median of -13.13 kg/lactation. The reviewed studies revealed a prolonged calving interval by around 30 days and a 1.5 to 3 times higher likeliness of culling per lactation in PTB positive animals. Results from this scoping review provide evidence-based inputs for the development of economic models aiming at the estimation of the costs and benefits associated with different disease control scenarios for PTB.
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Affiliation(s)
- Silja Griss
- Vetsuisse Faculty, Veterinary Public Health Institute, University of Bern, Bern, Switzerland
- Graduate School for Cellular and Biomedical Sciences, University of Bern, Bern, Switzerland
| | - Tanja Knific
- Veterinary Faculty, Institute of Food Safety, Feed and Environment, University of Ljubljana, Ljubljana, Slovenia
| | - Anne Buzzell
- Vetsuisse Faculty, Veterinary Public Health Institute, University of Bern, Bern, Switzerland
| | | | | | - Mireille Meylan
- Clinic for Ruminants, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Matjaž Ocepek
- Veterinary Faculty, Institute of Microbiology and Parasitology, University of Ljubljana, Ljubljana, Slovenia
| | - Beat Thomann
- Vetsuisse Faculty, Veterinary Public Health Institute, University of Bern, Bern, Switzerland
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Duda HC, von Toerne C, Korbonits L, Didier A, Scholz AM, Märtlbauer E, Hauck SM, Deeg CA. Cathepsin S Is More Abundant in Serum of Mycobacterium avium subsp. paratuberculosis-Infected Dairy Cows. Metabolites 2024; 14:215. [PMID: 38668343 PMCID: PMC11051907 DOI: 10.3390/metabo14040215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2024] [Revised: 04/05/2024] [Accepted: 04/09/2024] [Indexed: 04/28/2024] Open
Abstract
Mycobacterium avium subsp. paratuberculosis (MAP) is the causative agent of bovine paratuberculosis, a chronic granulomatous enteritis leading to economic losses and posing a risk to human health due to its zoonotic potential. The pathogen cannot reliably be detected by standard methods, and immunological procedures during the infection are not well understood. Therefore, the aim of our study was to explore host-pathogen interactions in MAP-infected dairy cows and to improve diagnostic tests. Serum proteomics analysis using quantitative label-free LC-MS/MS revealed 60 differentially abundant proteins in MAP-infected dairy cows compared to healthy controls from the same infected herd and 90 differentially abundant proteins in comparison to another control group from an uninfected herd. Pathway enrichment analysis provided new insights into the immune response to MAP and susceptibility to the infection. Furthermore, we found a higher abundance of Cathepsin S (CTSS) in the serum of MAP-infected dairy cows, which is involved in multiple enriched pathways associated with the immune system. Confirmed with Western blotting, we identified CTSS as a potential biomarker for bovine paratuberculosis. This study enabled a better understanding of procedures in the host-pathogen response to MAP and improved detection of paratuberculosis-diseased cattle.
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Affiliation(s)
- Heidi C. Duda
- Chair of Physiology, Department of Veterinary Sciences, Ludwig Maximilian University of Munich, D-82152 Martinsried, Germany
| | - Christine von Toerne
- Metabolomics and Proteomics Core, Helmholtz Center Munich, German Research Center for Environmental Health, D-85763 Neuherberg, Germany (S.M.H.)
| | - Lucia Korbonits
- Chair of Physiology, Department of Veterinary Sciences, Ludwig Maximilian University of Munich, D-82152 Martinsried, Germany
| | - Andrea Didier
- Chair of Hygiene and Technology of Milk, Department of Veterinary Sciences, Ludwig Maximilian University of Munich, D-85764 Oberschleißheim, Germany; (A.D.)
| | - Armin M. Scholz
- Livestock Center of the Faculty of Veterinary Medicine, Ludwig Maximilian University of Munich, D-85764 Oberschleißheim, Germany;
| | - Erwin Märtlbauer
- Chair of Hygiene and Technology of Milk, Department of Veterinary Sciences, Ludwig Maximilian University of Munich, D-85764 Oberschleißheim, Germany; (A.D.)
| | - Stefanie M. Hauck
- Metabolomics and Proteomics Core, Helmholtz Center Munich, German Research Center for Environmental Health, D-85763 Neuherberg, Germany (S.M.H.)
| | - Cornelia A. Deeg
- Chair of Physiology, Department of Veterinary Sciences, Ludwig Maximilian University of Munich, D-82152 Martinsried, Germany
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9
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de Noronha Xavier A, de Sá LMN, de Nazaré Santos Ferreira M, de Oliveira PRF, de Moraes Peixoto R, Mota RA, Junior JWP. First serological diagnosis of Mycobacterium avium subsp. paratuberculosis infection in sheep in the state of Pernambuco, Brazil. Vet Res Commun 2024; 48:1293-1299. [PMID: 38206561 DOI: 10.1007/s11259-024-10300-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Accepted: 01/07/2024] [Indexed: 01/12/2024]
Abstract
This study aimed to diagnose Mycobacterium avium subsp. paratuberculosis (MAP) infections in sheep in the state of Pernambuco, Brazil. A total of 276 blood samples were analyzed using the enzyme-linked immunosorbent assay IDEXX Paratuberculosis Screening kit, and 261 fecal samples were submitted for bacterial culture and polymerase chain reaction tests. An animal-level sero-frequency of 0.72% (n = 2/276) and a farm-level sero-frequency of 20% (n = 2/10) were found. All fecal sample cultures were negative, and molecular analyses were also negative. To the best of our knowledge, this is the first study of MAP infection in sheep in the state of Pernambuco and one of the pioneers in the country. It is an asymptomatic disease that is difficult to diagnose in this species because the susceptibility of sheep to the organism is lower than that of other ruminant species. However, the sero-frequency found reveals that there is MAP exposure in sheep flocks in the region. In addition, serological monitoring can contribute to the observation of the organism's behavior in herds. Our results support the potential risk of MAP infection in sheep in the state of Pernambuco, Brazil.
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Affiliation(s)
- Amanda de Noronha Xavier
- Department of Veterinary Medicine, Federal Rural University of Pernambuco, Rua Dom Manuel de Medeiros, s/n- Dois Irmãos, Recife, PE, 52171-900, Brazil.
| | - Luenda Menezes Novaes de Sá
- Federal Institute of the Pernambuco Sertão, Floresta Campus, Rua Projetada, s/n - Caetano II, Floresta, PE, 56400-000, Brazil
| | - Maria de Nazaré Santos Ferreira
- Department of Veterinary Medicine, Federal Rural University of Pernambuco, Rua Dom Manuel de Medeiros, s/n- Dois Irmãos, Recife, PE, 52171-900, Brazil
| | - Pollyanne Raysa Fernandes de Oliveira
- Department of Veterinary Medicine, Federal Rural University of Pernambuco, Rua Dom Manuel de Medeiros, s/n- Dois Irmãos, Recife, PE, 52171-900, Brazil
| | - Rodolfo de Moraes Peixoto
- Federal Institute of the Pernambuco Sertão, Campus Petrolina - Rural Zone, PE 647, Km 22, PISNC N - 4, Zona Rural, Petrolina, PE, 56302-970, Brazil
| | - Rinaldo Aparecido Mota
- Department of Veterinary Medicine, Federal Rural University of Pernambuco, Rua Dom Manuel de Medeiros, s/n- Dois Irmãos, Recife, PE, 52171-900, Brazil
| | - José Wilton Pinheiro Junior
- Department of Veterinary Medicine, Federal Rural University of Pernambuco, Rua Dom Manuel de Medeiros, s/n- Dois Irmãos, Recife, PE, 52171-900, Brazil
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10
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Worsley L, Davies PL. Inter-laboratory ring trial to compare four quantitative polymerase chain reaction assays employed for detection of Mycobacterium avium subspecies paratuberculosis. Microbiol Spectr 2024; 12:e0221023. [PMID: 38323833 PMCID: PMC10913479 DOI: 10.1128/spectrum.02210-23] [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: 05/26/2023] [Accepted: 12/18/2023] [Indexed: 02/08/2024] Open
Abstract
Johne's disease is an infectious enteric disease caused by Mycobacterium avium subspecies paratuberculosis (MAP) affecting ruminant species worldwide. In Project 1, an independent performance comparison ring trail was conducted between three different commercial MAP quantitative polymerase chain reaction (qPCR) assay services (B, C, and D) currently marketed in Great Britain by three separate laboratories against each other and against a fourth assay (A) not available commercially in Great Britain. A total of 205 individual ovine and bovine samples from five farms were analyzed to give 41 sets of pooled results (pool size five) from each laboratory according to their specific protocols. The numbers of positive pools for assays A-D were 18, 12, 11, and 1 (43.9%, 29.2%, 26.8%, and 2.4%), respectively. Assessment of interrater reliability produced a Fleiss' kappa coefficient of 0.15, indicating very poor overall agreement between the four laboratories. Laboratories A-D diagnosed 4, 3, 2, and 1 flocks at the farm level, respectively, as MAP positive. In Project 2, 38 pooled ovine samples from 10 flocks were analyzed to compare the performance of laboratories A and B. The numbers of positive results for laboratories A and B were 24 (63.1%) and 17 (44.7%), respectively (Cohen's kappa 0.54), indicating that laboratory A was more sensitive than B in line with results from Project 1. Variation between laboratories offering MAP qPCR assays is a significant concern, and further work is warranted to validate and standardize the performance of assays between laboratories for both ovine and bovine samples.IMPORTANCEOur study reports the findings of an inter-laboratory ring trial comparing the performance of four different quantitative polymerase chain reaction (qPCR) assay services for detecting Mycobacterium avium subspecies paratuberculosis (MAP) infection in cattle and sheep. MAP is the causative agent of Johne's disease (also known as paratuberculosis), a significant production-limiting disease in livestock populations with a worldwide distribution. The content of this paper is significant and novel as it is the first to highlight the marked variation between the diagnostic sensitivity and reproducibility of the three principal commercial laboratories offering MAP qPCR diagnostic and screening services in Great Britain. The low sensitivity and high variability between the laboratories are of great concern and relevance to veterinary practitioners and livestock producers.
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Affiliation(s)
- L. Worsley
- Department of Livestock and One Health, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Leahurst Campus, Neston, Cheshire, United Kingdom
| | - P. L. Davies
- Department of Livestock and One Health, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Leahurst Campus, Neston, Cheshire, United Kingdom
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11
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Usai MG, Casu S, Sechi T, Salaris SL, Miari S, Mulas G, Cancedda MG, Ligios C, Carta A. Advances in understanding the genetic architecture of antibody response to paratuberculosis in sheep by heritability estimate and LDLA mapping analyses and investigation of candidate regions using sequence-based data. Genet Sel Evol 2024; 56:5. [PMID: 38200416 PMCID: PMC10777618 DOI: 10.1186/s12711-023-00873-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 12/20/2023] [Indexed: 01/12/2024] Open
Abstract
BACKGROUND Paratuberculosis is a contagious and incurable disease that is caused by Mycobacterium avium subsp. paratuberculosis (MAP) with significant negative effects on animal welfare and farm profitability. Based on a large naturally infected flock over 12 years, we analyzed repeated enzyme-linked immunosorbent assay tests (ELISA), OvineSNP50 BeadChip genotypes and whole-genome sequences imputed from 56 influential animals. The main goals were to estimate the genetic parameters of proxy traits for resistance to MAP, identify genomic regions associated with the host's immune response against MAP and search for candidate genes and causative mutations through association and functional annotation analyses of polymorphisms identified by sequencing. RESULTS Two variables were derived from ELISA tests. The first, a binary variable, assessed the infection status of each animal over the entire productive life, while the second considered the level of antibody recorded over time. Very similar results were obtained for both variables. Heritability estimates of about 0.20 were found and a significant region capturing 18% and 13% of the genetic variance was detected on ovine chromosome 20 by linkage disequilibrium and linkage analysis on OvineSNP50 positions. Functional annotation and association analyses on the imputed sequence polymorphisms that were identified in this region were carried out. No significant variants showed a functional effect on the genes that mapped to this region, most of which belong to the major histocompatibility complex class II (MHC II). However, the conditional analysis led to the identification of two significant polymorphisms that can explain the genetic variance associated with the investigated genomic region. CONCLUSIONS Our results confirm the involvement of the host's genetics in susceptibility to MAP in sheep and suggest that selective breeding may be an option to limit the infection. The estimated heritability is moderate with a relevant portion being due to a highly significant region on ovine chromosome 20. The results of the combined use of sequence-based data and functional analyses suggest several genes belonging to the MHC II as the most likely candidates, although no mutations in their coding regions showed a significant association. Nevertheless, information from genotypes of two highly significant polymorphisms in the region can enhance the efficiency of selective breeding programs.
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Affiliation(s)
- Mario Graziano Usai
- Research Unit Genetics and Biotechnology - Agris Sardegna, 07100, Sassari, Italy
| | - Sara Casu
- Research Unit Genetics and Biotechnology - Agris Sardegna, 07100, Sassari, Italy.
| | - Tiziana Sechi
- Research Unit Genetics and Biotechnology - Agris Sardegna, 07100, Sassari, Italy
| | - Sotero L Salaris
- Research Unit Genetics and Biotechnology - Agris Sardegna, 07100, Sassari, Italy
| | - Sabrina Miari
- Research Unit Genetics and Biotechnology - Agris Sardegna, 07100, Sassari, Italy
| | - Giuliana Mulas
- Research Unit Genetics and Biotechnology - Agris Sardegna, 07100, Sassari, Italy
| | | | - Ciriaco Ligios
- Istituto Zooprofilattico Sperimentale Della Sardegna G. Pegreffi, 07100, Sassari, Italy
| | - Antonello Carta
- Research Unit Genetics and Biotechnology - Agris Sardegna, 07100, Sassari, Italy
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12
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Jurado-Martos F, Cardoso-Toset F, Tarradas C, Galán-Relaño Á, Sánchez-Carvajal JM, Ruedas-Torres I, Vera-Salmoral E, Larenas-Muñoz F, Carrasco L, Gómez-Laguna J, Lorenzo BH, Luque I. Evaluation of the diagnostic accuracy of the serological test for paratuberculosis in cattle according to tuberculosis status. Vet Rec 2023; 193:e3313. [PMID: 37718548 DOI: 10.1002/vetr.3313] [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: 01/21/2023] [Revised: 07/18/2023] [Accepted: 07/24/2023] [Indexed: 09/19/2023]
Abstract
BACKGROUND Enzyme-linked immunosorbent assays (ELISAs) are the most widely used diagnostic tools in bovine paratuberculosis (bPTB) control. However, their diagnostic accuracy may be compromised by bovine tuberculosis (bTB) infection, as both diseases share diagnostic targets. METHODS The bPTB and bTB infection status of 228 animals was determined using microbiological tissue culture as a reference test. The diagnostic performance (sensitivity, specificity, likelihood ratios and predictive values) of the bPTB-ELISA on blood serum samples, taking into account the bPTB animal-level prevalence of the area and the bTB status of the animals, was evaluated. RESULTS A sensitivity of 40.7% (95% confidence interval [CI]: 27.5%-53.9%) and a specificity of 94.7% (95% CI: 91.4%-98.0%) were obtained for bPTB-ELISA in all animals. A bPTB-ELISA-positive animal would have a post-test probability of 70% or more of being infected in areas with a bPTB prevalence of 23% or more. A negative bPTB-ELISA result, in areas with a bPTB prevalence of 41% or less, would rule out the disease with more than 70% certainty. In bTB-positive animals, sensitivity increased (94.4% [95% CI: 81.4%-100%] vs. 25.1% [95% CI: 11.8%-38.4%]) and specificity decreased (82.6% [95% CI: 71.8%-93.4%] vs. 99.4% [95% CI: 98.0%-99.9%]). The bPTB-ELISA is a good tool to rule out bPTB co-infection in bTB-positive animals, while in bTB-negative animals, it allows confirmation of disease with more than 70% probability if disease prevalence is 6% or more. LIMITATIONS The observed differences could be enhanced by the effect of frequent application of the intradermal tuberculin test, which was unknown in the animals studied. CONCLUSIONS These results provide useful guidance for the application and interpretation of ELISA as a tool for bPTB disease control.
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Affiliation(s)
- Francisco Jurado-Martos
- CICAP-Food Research Centre, Pozoblanco, Cordoba, Spain
- Department of Animal Health, University of Cordoba, Cordoba, Spain
| | | | - Carmen Tarradas
- Department of Animal Health, University of Cordoba, Cordoba, Spain
- UIC Zoonosis y Enfermedades Emergentes ENZOEM, International Excellence Agrifood Campus 'ceiA3', University of Cordoba, Cordoba, Spain
| | | | - José María Sánchez-Carvajal
- Pathology and Immunology Group (UCO-PIG), Department of Anatomy and Comparative Pathology and Toxicology, University of Cordoba, Cordoba, Spain
| | - Inés Ruedas-Torres
- Pathology and Immunology Group (UCO-PIG), Department of Anatomy and Comparative Pathology and Toxicology, University of Cordoba, Cordoba, Spain
| | | | - Fernanda Larenas-Muñoz
- Pathology and Immunology Group (UCO-PIG), Department of Anatomy and Comparative Pathology and Toxicology, University of Cordoba, Cordoba, Spain
| | - Librado Carrasco
- UIC Zoonosis y Enfermedades Emergentes ENZOEM, International Excellence Agrifood Campus 'ceiA3', University of Cordoba, Cordoba, Spain
- Pathology and Immunology Group (UCO-PIG), Department of Anatomy and Comparative Pathology and Toxicology, University of Cordoba, Cordoba, Spain
| | - Jaime Gómez-Laguna
- UIC Zoonosis y Enfermedades Emergentes ENZOEM, International Excellence Agrifood Campus 'ceiA3', University of Cordoba, Cordoba, Spain
- Pathology and Immunology Group (UCO-PIG), Department of Anatomy and Comparative Pathology and Toxicology, University of Cordoba, Cordoba, Spain
| | - Belén Huerta Lorenzo
- Department of Animal Health, University of Cordoba, Cordoba, Spain
- UIC Zoonosis y Enfermedades Emergentes ENZOEM, International Excellence Agrifood Campus 'ceiA3', University of Cordoba, Cordoba, Spain
| | - Inmaculada Luque
- Department of Animal Health, University of Cordoba, Cordoba, Spain
- UIC Zoonosis y Enfermedades Emergentes ENZOEM, International Excellence Agrifood Campus 'ceiA3', University of Cordoba, Cordoba, Spain
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13
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Garcia AA, Plain KM, Thomson PC, Thomas AJ, Davies CJ, Toribio JALML, Whittington RJ. Association between major histocompatibility complex haplotypes and susceptibility of unvaccinated and vaccinated cattle to paratuberculosis. Vet Immunol Immunopathol 2023; 265:110677. [PMID: 37952345 DOI: 10.1016/j.vetimm.2023.110677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Revised: 11/02/2023] [Accepted: 11/03/2023] [Indexed: 11/14/2023]
Abstract
Bovine Johne's disease (BJD) or paratuberculosis is caused by Mycobacterium avium spp. paratuberculosis (MAP) and is a worldwide problem among domestic and wild ruminants. While vaccines are available, natural differences in background immunity between breeds within species and between individuals within herds suggest that genetic differences may be able to be exploited in marker-assisted selection as an aid to disease control. The major histocompatibility complex (MHC) is an important component in immune recognition with considerable genetic variability. In this study, associations between the MHC and resistance to BJD were explored in dairy cattle across two herds in which some of the cattle had been vaccinated with Silirum® (n = 540 cows). A BJD susceptible animal was exposed to MAP and became infected, while a resistant animal was exposed but did not become infected. There are different ways to define both exposure and infection, with different levels of stringency, therefore many classifications of the same set of animals are possible and were included in the analysis. The polymorphic regions of major histocompatibility complex class I (MHC I) and class II (MHC II) genes were amplified from the genomic DNA by PCR and sequenced, targeting exons 2 and 3 of the classical and non-classical MHC I genes and exon 2 from the DRB3, DQA1, DQA2 + 3 and DQB MHC II genes. The frequencies of MHC I and MHC II haplotypes and alleles were determined in susceptible and resistant populations. In unvaccinated animals, seven MHC I haplotypes and seven MHC II haplotypes were associated with susceptibility while two MHC I and six MHC II haplotypes were associated with resistance (P < 0.05). In vaccinated animals, two MHC I and three MHC II haplotypes were associated with susceptibility, while one MHC I and two MHC II haplotypes were associated with resistance (P < 0.05). The alleles in significant haplotypes were also identified. Case definitions with higher stringency resulted in fewer animals being included in the analyses, but the power to detect an association was not reduced and there was an increase in strength and consistency of associations. Consistent use of stringent case definitions is likely to improve agreement in future association studies.
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Affiliation(s)
- Anabel A Garcia
- Sydney School of Veterinary Science, Faculty of Science, The University of Sydney, Camden, NSW 2570, Australia
| | - Karren M Plain
- Sydney School of Veterinary Science, Faculty of Science, The University of Sydney, Camden, NSW 2570, Australia
| | - Peter C Thomson
- Sydney School of Veterinary Science, Faculty of Science, The University of Sydney, Camden, NSW 2570, Australia
| | - Aaron J Thomas
- Department of Animal, Dairy and Veterinary Sciences, College of Agriculture and Applied Sciences, Utah State University, Logan, UT 84322, USA
| | - Christopher J Davies
- Department of Animal, Dairy and Veterinary Sciences, College of Agriculture and Applied Sciences, Utah State University, Logan, UT 84322, USA
| | - Jenny-Ann L M L Toribio
- Sydney School of Veterinary Science, Faculty of Science, The University of Sydney, Camden, NSW 2570, Australia
| | - Richard J Whittington
- Sydney School of Veterinary Science, Faculty of Science, The University of Sydney, Camden, NSW 2570, Australia.
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14
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Alonso-Hearn M, Ballesteros A, Navarro A, Badia-Bringué G, Casais R. Lateral-flow assays for bovine paratuberculosis diagnosis. Front Vet Sci 2023; 10:1257488. [PMID: 37901111 PMCID: PMC10601461 DOI: 10.3389/fvets.2023.1257488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Accepted: 09/27/2023] [Indexed: 10/31/2023] Open
Abstract
Mycobacterium avium subsp. paratuberculosis (MAP) causes bovine paratuberculosis (PTB). PTB is responsible for significant economic losses in dairy herds around the word. PTB control programs that rely on testing and culling of test-positive cows have been developed. Current diagnostics, such as ELISA for detecting MAP antibodies in serum samples and PCR detecting MAP DNA in feces, have inadequate sensitivity for detecting subclinical animals. Innovative "omics" technologies such as next-generation sequencing (NGS) technology-based RNA-sequencing (RNA-Seq), proteomics and metabolomics can be used to find host biomarkers. The discovered biomarkers (RNA, microRNAs, proteins, metabolites) can then be used to develop new and more sensitive approaches for PTB diagnosis. Traditional approaches for measuring host antibodies and biomarkers, such as ELISAs, northern blotting, quantitative reverse-transcriptase polymerase chain reaction (RT-qPCR), cDNA microarrays, and mass spectrometry are time-consuming, expensive, and sometimes exhibit poor sensitivity. With the rapid development of nanotechnology, low-cost monitoring devices for measuring antibodies against MAP proteins in point-of-care (POC) settings have been developed. Lateral flow assays (LFAs), in particular, are thought to be appropriate for the on-site detection of antibodies to MAP antigens and/or host biomarkers. This review aims to summarize LFAs that have recently been developed to accurately detect antibodies against MAP antigens, as well as the benefits that host biomarkers linked with MAP infection give to PTB diagnosis. The identification of these novel biomarkers could be the basis for the development of new LFAs. The dairy industry and producers are likely to benefit from reliable and rapid technologies capable of detecting MAP infection in situ to establish a quick and sensitive PTB diagnosis.
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Affiliation(s)
- Marta Alonso-Hearn
- Department of Animal Health, NEIKER-Basque Institute for Agricultural Research and Development, Basque Research and Technology Alliance, Derio, Bizkaia, Spain
| | - Ana Ballesteros
- Biolan Health S.L, Technological Park of Bizkaia, Zamudio, Bizkaia, Spain
| | - Alejandra Navarro
- SERIDA, Servicio Regional de Investigación y Desarrollo Agroalimentario, Center of Animal Biotechnology, Deva, Asturias, Spain
| | - Gerard Badia-Bringué
- Department of Animal Health, NEIKER-Basque Institute for Agricultural Research and Development, Basque Research and Technology Alliance, Derio, Bizkaia, Spain
| | - Rosa Casais
- SERIDA, Servicio Regional de Investigación y Desarrollo Agroalimentario, Center of Animal Biotechnology, Deva, Asturias, Spain
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15
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Russo S, Cortimiglia C, Filippi A, Palladini G, Garbarino C, Massella E, Ricchi M. Validation of digital PCR assay for the quantification of Mycobacterium avium subsp. paratuberculosis in bovine faeces according to the ISO 20395:2019. J Microbiol Methods 2023; 213:106825. [PMID: 37739126 DOI: 10.1016/j.mimet.2023.106825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 09/18/2023] [Accepted: 09/19/2023] [Indexed: 09/24/2023]
Abstract
Paratuberculosis is an enteric disease caused by Mycobacterium avium subs. Paratuberculosis (MAP). Quantifying the load of MAP in faeces samples offers the advantage of determining the stage of infection and planning control measures. Currently, detection of MAP in faecal specimens relies on cultural assays and quantitative PCR (qPCR), but both methods have limitations such as prolonged isolation times for cultural assay and the absence of nucleic acid standards for qPCR. Digital PCR (dPCR) represents an advancement over qPCR as it allows direct quantification of nucleic acid in a sample without the need for a standard curve. The present paper reports about the validation process, following ISO 20395:2019 guidelines, of a F57 digital PCR assay for quantifying MAP cells in faecal samples. Based on our validation, the Limit Of Detection (LOD) corresponds to 7.85 104 MAP cells/g, and the Limit Of Quantification (LOQ) to 7.85 105 MAP cells, with an efficiency of recovery at LOQ estimated about 4.5%. To assess precision, we evaluated the same faecal sample extracted by two different operators at different times. The standard deviation under repeatability conditions (S Repeatability) and intersession variability conditions (S Intermediate) were calculated, resulting in values of 0.43 and 0.26, respectively. Trueness was determined at LOQ and a value ten times higher, yielding percentages of 3.35% and 5.16%, respectively. Linearity showed a R2 value of 0.998, indicating strong linear correlation. Measurement uncertainty was 26% in absolute value and 3% on a logarithmic base 10 scale. Overall, the assay exhibits good specificity and robustness. Our validation underlines the good performance of the quantification method and allow the laboratory to provide quantitative results of MAP/cells on faecal samples.
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Affiliation(s)
- Simone Russo
- National Reference Centre and WOAH Reference Laboratory for Paratuberculosis, Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna "Bruno Ubertini", Piacenza, Italy..
| | - Claudia Cortimiglia
- Dipartimento di Scienze e Tecnologie Alimentari per una Filiera Agro-Alimentare Sostenibile (DISTAS), Università Cattolica del Sacro Cuore, Piacenza, Italy
| | - Anita Filippi
- National Reference Centre and WOAH Reference Laboratory for Paratuberculosis, Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna "Bruno Ubertini", Piacenza, Italy
| | - Giorgia Palladini
- National Reference Centre and WOAH Reference Laboratory for Paratuberculosis, Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna "Bruno Ubertini", Piacenza, Italy..
| | - Chiara Garbarino
- National Reference Centre and WOAH Reference Laboratory for Paratuberculosis, Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna "Bruno Ubertini", Piacenza, Italy..
| | - Elisa Massella
- National Reference Centre and WOAH Reference Laboratory for Paratuberculosis, Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna "Bruno Ubertini", Piacenza, 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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16
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Reynolds JA, Bradley AJ, Sherwin VE, Remnant JG, Hudson CD. Associations between Johne's disease and fertility in UK dairy herds. Vet J 2023; 298-299:106015. [PMID: 37479055 DOI: 10.1016/j.tvjl.2023.106015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2023] [Revised: 06/19/2023] [Accepted: 07/18/2023] [Indexed: 07/23/2023]
Abstract
The objective of this observational study was to quantify associations between Mycobacterium avium subspecies paratuberculosis (MAP) antibody status and a variety of fertility outcomes, in UK dairy cattle. Longitudinal milk recording, fertility and MAP antibody enzyme-linked immunosorbent assay (ELISA) milk test data were collated retrospectively from 121,762 lactations in 78 herds. Datasets were structured into appropriate units to suit outcomes and enable temporal association between current and future MAP status, and fertility measures. Current MAP status was categorised according to most recent status within 180 days, with time-related future MAP status assigned based on MAP antibody ELISA milk test data for each cow. Multilevel multivariable logistic regression models were used to evaluate associations between MAP status and 21-day pregnancy and submission rate and conception risk. Posterior predictions and cross-validation techniques were used to assess model fit and check model building assumptions. A negative association was found between risk of insemination (Odds Ratio [OR], 0.78; 95% Credible Interval [CI], 0.66-0.92) and conception occurring (OR, 0.65; CI, 0.5-0.84) and transition from negative to non-negative MAP test status in the next 30-90 days. A positive association was observed between risk of insemination (OR, 1.34; CI, 1.16-1.52) and conception occurring (OR, 1.26; CI, 1.11-1.43) and transition from negative to non-negative MAP test status in the next 90-180 days. Current positive MAP test status was negatively and positively associated with insemination (OR, 0.59; CI, 0.49-0.70) and conception risk (OR, 1.12; CI, 0.96-1.30), respectively. Herd managers will have had access to test results, declaring cows with past recent or multiple positive MAP antibody ELISA results not to be bred, negatively influencing insemination risk. Overall, these results demonstrate the temporal association between a positive MAP antibody ELISA result and dairy cow fertility outcomes, with particular variability prior to a positive MAP antibody ELISA result.
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Affiliation(s)
- J A Reynolds
- School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington LE12 5RD, UK.
| | - A J Bradley
- Quality Milk Management Services, Cedar Barn, Easton Hill, Wells, BA5 1DU, UK
| | - V E Sherwin
- School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington LE12 5RD, UK
| | - J G Remnant
- School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington LE12 5RD, UK
| | - C D Hudson
- School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington LE12 5RD, UK
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17
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Gaffuri A, Barsi F, Magni E, Bergagna S, Dellamaria D, Ricchi M, De Paolis L, Galletti G, Arrigoni N, Lorenzi V, Fusi F, Prosperi A, Garbarino C. Paratuberculosis, Animal Welfare and Biosecurity: A Survey in 33 Northern Italy Dairy Goat Farms. Animals (Basel) 2023; 13:2346. [PMID: 37508122 PMCID: PMC10376716 DOI: 10.3390/ani13142346] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 05/17/2023] [Accepted: 07/17/2023] [Indexed: 07/30/2023] Open
Abstract
Paratuberculosis is a notable infectious disease of ruminants. Goats appear to be particularly susceptible. The survey aimed to investigate the spread of paratuberculosis in Italian goat farming and evaluate whether the presence of the disease could be influenced by welfare and biosecurity deficiencies. A serological survey for paratuberculosis in 33 dairy farms in northern Italy was conducted. Contextually, animal welfare and biosecurity were assessed, using a standardized protocol of 36 welfare indicators and 15 biosecurity indicators which assigns to each farm a welfare and biosecurity score from 0 (any application) to 100% (full application). An overall result of less than 60% was considered insufficient. Nineteen farms (58%) tested positive for paratuberculosis, with a mean intra-herd seroprevalence of 7.4%. Total welfare ranged from 39.56 to 90.7% (mean 68.64%). Biosecurity scores ranged from 10.04 to 90.01% (mean 57.57%). Eight farms (24%) showed poor welfare conditions (welfare score < 60%) and 19 (58%) an unsatisfactory biosecurity condition (biosecurity score < 60%). With respect to the explorative character of the study, an indicative association between seven welfare and biosecurity indicators and paratuberculosis seropositivity was identified. The presence of paratuberculosis in northern Italy dairy goat farms was confirmed. The welfare and biosecurity assessment protocol proved to be an accurate tool, capable of identifying critical points for managing health, welfare and productivity.
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Affiliation(s)
- Alessandra Gaffuri
- Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna "Bruno Ubertini", 25124 Brescia, Italy
| | - Filippo Barsi
- Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna "Bruno Ubertini", 25124 Brescia, Italy
- Italian National Reference Centre for Paratuberculosis, Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna "Bruno Ubertini", 29027 Piacenza, Italy
| | - Edoardo Magni
- Official Veterinary Service, ATS Montagna, 23100 Sondrio, Italy
| | - Stefania Bergagna
- Istituto Zooprofilattico Sperimentale del Piemonte Liguria e Valle d'Aosta, 10154 Torino, Italy
| | - Debora Dellamaria
- Istituto Zooprofilattico Sperimentale delle Venezie, 35020 Padova, Italy
| | - Matteo Ricchi
- Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna "Bruno Ubertini", 25124 Brescia, Italy
- Italian National Reference Centre for Paratuberculosis, Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna "Bruno Ubertini", 29027 Piacenza, Italy
| | - Livia De Paolis
- Istituto Zooprofilattico Sperimentale del Piemonte Liguria e Valle d'Aosta, 10154 Torino, Italy
| | - Giorgio Galletti
- Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna "Bruno Ubertini", 25124 Brescia, Italy
| | - Norma Arrigoni
- Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna "Bruno Ubertini", 25124 Brescia, Italy
- Italian National Reference Centre for Paratuberculosis, Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna "Bruno Ubertini", 29027 Piacenza, Italy
| | - Valentina Lorenzi
- Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna "Bruno Ubertini", 25124 Brescia, Italy
- Italian National Reference Centre for Animal Welfare, Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna "Bruno Ubertini", 25124 Brescia, Italy
| | - Francesca Fusi
- Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna "Bruno Ubertini", 25124 Brescia, Italy
- Italian National Reference Centre for Animal Welfare, Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna "Bruno Ubertini", 25124 Brescia, Italy
| | - Alice Prosperi
- Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna "Bruno Ubertini", 25124 Brescia, Italy
| | - Chiara Garbarino
- Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna "Bruno Ubertini", 25124 Brescia, Italy
- Italian National Reference Centre for Paratuberculosis, Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna "Bruno Ubertini", 29027 Piacenza, Italy
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Jurado-Martos F, Cardoso-Toset F, Tarradas C, Galán-Relaño Á, Sánchez-Carvajal JM, Ruedas-Torres I, Vera E, Larenas-Muñoz F, Gómez-Gascón L, Rodríguez-Gómez IM, Carrasco L, Gómez-Laguna J, Lorenzo BH, Luque I. Diagnostic performance of faecal and tissue multiplex qPCR IS900/F57 for the detection of Mycobacterium avium subspecies paratuberculosis in cattle. Res Vet Sci 2023; 161:156-162. [PMID: 37406574 DOI: 10.1016/j.rvsc.2023.06.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2023] [Revised: 05/17/2023] [Accepted: 06/05/2023] [Indexed: 07/07/2023]
Abstract
Mycobacterium avium subspecies paratuberculosis (MAP) is responsible for bovine-paratuberculosis (bPTB), which causes high production losses in cattle. A cross-sectional study was conducted in 228 cattle to evaluate the validity and diagnostic utility of a multiplex real-time PCR (qPCR) on faecal and intestinal samples [ileocaecal valve (ICV) and ileocaecal lymph nodes (ICLN)], using intestinal tissue culture as a reference test. Based on the sensitivity, specificity, and likelihood ratios (LR) obtained, the diagnostic value of faecal qPCR for confirming MAP infection was moderate (sensitivity 50.3%, specificity 93.5%, positive LR 7.8), and low to rule it out (negative LR 0.5). In areas with a prevalence of >23% the credibility of positive results was higher than 70%. In the case of negative results, their credibility was higher than 90% in herds with an infection rate below 19%, so faecal qPCR would be very useful in these areas to certify the absence of infection. For post-mortem diagnosis, qPCR on ICV samples showed good diagnostic accuracy to confirm the disease (sensitivity 71.7%, specificity 93.3%, positive LR 10.8), with a credibility higher than 70% in animals from areas or herds with a prevalence of infection greater than or equal to 18%. The best strategy to rule out the disease was the parallel combination of both tissues (ICV + ICLN) (sensitivity 81.3%, specificity 89.5%, negative LR 0.2) with a credibility of over 95% in animals from areas with an infection prevalence of 0-20%. Faecal and tissues qPCR techniques can be used to monitor bPTB, the interpretation of results, according to epidemiological situation of the herd or area, are shown.
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Affiliation(s)
| | | | - Carmen Tarradas
- Department of Animal Health, University of Cordoba, Spain; UIC Zoonosis y Enfermedades Emergentes ENZOEM, International Excellence Agrifood Campus 'ceiA3', University of Cordoba, Cordoba, Spain
| | - Ángela Galán-Relaño
- Department of Animal Health, University of Cordoba, Spain; UIC Zoonosis y Enfermedades Emergentes ENZOEM, International Excellence Agrifood Campus 'ceiA3', University of Cordoba, Cordoba, Spain
| | - José María Sánchez-Carvajal
- Department of Anatomy and Comparative Pathology and Toxicology, Pathology and Immunology Group (UCO-PIG), University of Cordoba, Spain; UIC Zoonosis y Enfermedades Emergentes ENZOEM, International Excellence Agrifood Campus 'ceiA3', University of Cordoba, Cordoba, Spain
| | - Inés Ruedas-Torres
- Department of Anatomy and Comparative Pathology and Toxicology, Pathology and Immunology Group (UCO-PIG), University of Cordoba, Spain; UIC Zoonosis y Enfermedades Emergentes ENZOEM, International Excellence Agrifood Campus 'ceiA3', University of Cordoba, Cordoba, Spain
| | - Eduardo Vera
- Department of Animal Health, University of Cordoba, Spain
| | - Fernanda Larenas-Muñoz
- Department of Anatomy and Comparative Pathology and Toxicology, Pathology and Immunology Group (UCO-PIG), University of Cordoba, Spain
| | - Lidia Gómez-Gascón
- Department of Animal Health, University of Cordoba, Spain; UIC Zoonosis y Enfermedades Emergentes ENZOEM, International Excellence Agrifood Campus 'ceiA3', University of Cordoba, Cordoba, Spain
| | - Irene Magdalena Rodríguez-Gómez
- Department of Anatomy and Comparative Pathology and Toxicology, Pathology and Immunology Group (UCO-PIG), University of Cordoba, Spain; UIC Zoonosis y Enfermedades Emergentes ENZOEM, International Excellence Agrifood Campus 'ceiA3', University of Cordoba, Cordoba, Spain
| | - Librado Carrasco
- Department of Anatomy and Comparative Pathology and Toxicology, Pathology and Immunology Group (UCO-PIG), University of Cordoba, Spain; UIC Zoonosis y Enfermedades Emergentes ENZOEM, International Excellence Agrifood Campus 'ceiA3', University of Cordoba, Cordoba, Spain
| | - Jaime Gómez-Laguna
- Department of Anatomy and Comparative Pathology and Toxicology, Pathology and Immunology Group (UCO-PIG), University of Cordoba, Spain; UIC Zoonosis y Enfermedades Emergentes ENZOEM, International Excellence Agrifood Campus 'ceiA3', University of Cordoba, Cordoba, Spain
| | - Belén Huerta Lorenzo
- Department of Animal Health, University of Cordoba, Spain; UIC Zoonosis y Enfermedades Emergentes ENZOEM, International Excellence Agrifood Campus 'ceiA3', University of Cordoba, Cordoba, Spain
| | - Inmaculada Luque
- Department of Animal Health, University of Cordoba, Spain; UIC Zoonosis y Enfermedades Emergentes ENZOEM, International Excellence Agrifood Campus 'ceiA3', University of Cordoba, Cordoba, Spain
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Corbiere F, Guellouz D, Tasca C, Foures L, Dubaux E, Foucras G. Effects of Silirum ®-Based Vaccination Programs on Map Fecal Shedding and Serological Response in Seven French Dairy Herds. Animals (Basel) 2023; 13:ani13091569. [PMID: 37174606 PMCID: PMC10177616 DOI: 10.3390/ani13091569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 04/23/2023] [Accepted: 05/05/2023] [Indexed: 05/15/2023] Open
Abstract
(1) Background: paratuberculosis is an important disease in ruminants, causing worldwide economic losses to the livestock industry. Although vaccination is known not to prevent transmission of the causative agent Mycobacterium avium subsp. paratuberculosis (Map), it is considered an effective tool for paratuberculosis in infected herds. The objectives of this controlled field study were to evaluate the effects of the whole-cell heat-killed Silirum® vaccine on Map fecal shedding and serological status in dairy herds infected with paratuberculosis. (2) Methods: The serological status (ELISA) and fecal shedding (qPCR) of 358 vaccinated cows were assessed over 3 years in 7 infected dairy herds in the Meuse department, France. Within each herd, cows from the last non-vaccinated birth cohort (n = 265) were used as controls. The probability and level of Map fecal shedding and the serological status were modeled using multivariable mixed general linear regression models. (3) Results: Overall, 34.7% of cows tested positive at least once on fecal qPCR, with significant differences between herds, but high shedding levels were observed in only 5.5% of cows. Compared to non-vaccinated seronegative cows, a statistically significant reduction in the probability of Map shedding was found only in cows vaccinated before 4 to 5 months of age that tested negative for Map antibodies throughout the study period (odds ratio = 0.5, 95% confidence interval: 0.3-0.9, p = 0.008), but no significant effect of vaccination on the amount of Map shedding could be evidenced. Finally, the younger the cows were when vaccinated, the less they tested positive on the serum ELISA. (4) Conclusions: a beneficial effect of vaccination on Map fecal shedding may exist in cows vaccinated before 4 to 5 months of age. The variability of the serum ELISA response in vaccinated cows remains to be investigated.
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Schrott J, Sodoma E, Dünser M, Tichy A, Khol JL. Mycobacterium avium subsp. paratuberculosis in Sheep and Goats in Austria: Seroprevalence, Risk Factors and Detection from Boot Swab Samples. Animals (Basel) 2023; 13:ani13091517. [PMID: 37174554 PMCID: PMC10177492 DOI: 10.3390/ani13091517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 04/24/2023] [Accepted: 04/26/2023] [Indexed: 05/15/2023] Open
Abstract
This study aimed to investigate the prevalence of Mycobacterium avium subsp. paratuberculosis (MAP) in small ruminants in Austria by testing 22,019 serum samples with ELISA for the presence of specific antibodies. Furthermore, detailed investigations in five MAP-infected goat herds were carried out by ELISA, qPCR and bacterial culture. The found animal-level apparent MAP seroprevalence was 2.0% for goats and 0.7% for sheep (calculated true prevalence 3.5% and 1.2%, respectively). Herd-level apparent MAP seroprevalence was 11.1% for goat herds and 8.9% for sheep flocks. Significant risk factors for seropositivity in goat herds were: herd size, animal trading, farmed as a dairy herd, Animal Health Service membership and cohabitation with farmed game. For sheep flocks, seroprevalence was significantly higher in flocks with animal trading and where cattle or goats were kept in the flock, respectively. The overall apparent within-herd MAP seroprevalence in the five goat farms investigated was 21.8% (11.7%-28.0%, calculated true seroprevalence 38.6%) and an overall rate of MAP shedding of 12.3% was detected (5.0%-24.7%). It was possible to identify MAP by culture using boot swab samples in each herd. The results indicated a moderate MAP infection rate in small ruminants in Austria.
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Affiliation(s)
- Juliane Schrott
- Austrian Agency for Health and Food Safety (AGES), Institute for Veterinary Disease Control Innsbruck, Technikerstraße 70, 6020 Innsbruck, Austria
| | - Eva Sodoma
- Austrian Agency for Health and Food Safety (AGES), Institute for Veterinary Disease Control Innsbruck, Technikerstraße 70, 6020 Innsbruck, Austria
- Austrian Agency for Health and Food Safety (AGES), Institute for Veterinary Disease Control Linz, Wieningerstraße 8, 4020 Linz, Austria
| | - Michael Dünser
- Austrian Agency for Health and Food Safety (AGES), Institute for Veterinary Disease Control Innsbruck, Technikerstraße 70, 6020 Innsbruck, Austria
- Austrian Agency for Health and Food Safety (AGES), Institute for Veterinary Disease Control Linz, Wieningerstraße 8, 4020 Linz, Austria
| | - Alexander Tichy
- Platform for Bioinformatics and Biostatistics, Department of Biomedical Sciences, University of Veterinary Medicine Vienna, Veterinärplatz 1, 1210 Wien, Austria
| | - Johannes Lorenz Khol
- University Clinic for Ruminants, Department for Farm Animals and Veterinary Public Health, University of Veterinary Medicine Vienna, Veterinärplatz 1, 1210 Wien, Austria
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21
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Caldow GL, Douglas L, Thacker J, Mackay E, Berezowski J. Estimation of the specificity of an antibody ELISA for paratuberculosis generated from a sector of the UK cattle population using results from a paratuberculosis control programme. Prev Vet Med 2023; 215:105910. [PMID: 37054518 DOI: 10.1016/j.prevetmed.2023.105910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 03/17/2023] [Accepted: 04/03/2023] [Indexed: 04/05/2023]
Abstract
In the United Kingdom (UK) a voluntary programme to control paratuberculosis in cattle based on herd management and serological screening has been operating since 1998. The programme assigns a risk level to each participating herd according to the within herd seroprevalence and the confirmation of the presence of infection with Mycobacterium avium subspecies paratuberculosis (MAP) by faecal culture or polymerase chain reaction (PCR). From the outset a general concern over the specificity of the paratuberculosis antibody enzyme-linked immunosorbent assay (ELISA) resulted in the use of a faecal screen for the causal organism to negate or confirm infection in individual seropositive animals. Progress in improving the diagnostic tests has been gradual throughout the life of the programme and the under-pinning approach to using tests to determine the risk of paratuberculosis for a herd required to be re-examined. This study used a large data set of more than 143,000 test results over five years from the lowest paratuberculosis risk level category of herds to estimate the specificity of a commercially available paratuberculosis antibody ELISA for cattle. In each year of the study the estimated specificity reached or exceeded 0.998. We also examined the apparent impact that annual or more frequent application of the single intradermal comparative cervical tuberculin (SICCT) test for tuberculosis (TB), using purified protein derivatives of Mycobacterium bovis and Mycobacterium avium subspecies avium, had on specificity of the antibody ELISA for paratuberculosis. We found a statistically significant difference in three of the five years with herds that were officially tuberculosis free and not subject to frequent SICCT testing. This difference was small and considered to be of little practical importance for the paratuberculosis assurance programme. We concluded that, in the UK the mandatory TB surveillance programme of cattle herds is not a limiting factor in the use of serological testing to support herd-level assurance schemes for paratuberculosis. Furthermore, in paratuberculosis, where shedding of MAP is intermittent and the sensitivity of the commercially available PCR tests for detection MAP is highly variable, faecal screening of seropositive animals is an unreliable method for negating infection in seropositive cattle.
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22
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Evaluation of Environmental Sampling for Detection of Mycobacterium avium subspecies paratuberculosis in the Pre-Weaned Calf Area and Calving Area of Infected Dairy Farms Enrolled in a Voluntary Johne's Disease Control Programme. Animals (Basel) 2023; 13:ani13040669. [PMID: 36830456 PMCID: PMC9951948 DOI: 10.3390/ani13040669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 02/09/2023] [Accepted: 02/09/2023] [Indexed: 02/17/2023] Open
Abstract
One of the pillars of Johne's disease control is to break the cycle of transmission from infectious adult animals to young susceptible animals. Many control programmes utilise a risk assessment and management plan (RAMP) to identify specific risks for transmission of infection on individual farms and then recommend tailored biosecurity measures to mitigate the risk. It is important that infected farms in particular, practice effective biocontainment in the calving area and pre-weaned calf area. The objectives of this study were: (1) to determine what proportion of MAP-infected farms (PCR-positive) enrolled in a control programme had detectable MAP in their calf environment; (2) to compare RAMP scores and apparent within-herd prevalence (aWHP) of PCR-positive and PCR-negative farms; (3) to evaluate the correlation between RAMP scores, aWHP and levels of contamination based on PCR test Ct value. A novel environmental sampling protocol combining manure samples and boot swab samples was conducted in the calving area and pre-weaned calf area on 28 dairy farms with PCR-confirmed MAP infection. All samples were tested with PCR. Logistic regression modelling was used to evaluate the association between RAMP score and aWHP and PCR outcome. Overall, 46% of farms had positive PCR samples in either the calving area, pre-weaned calf area or both. The calving area was positive in 36% of farms and the pre-weaned calf area was positive in 21% of farms. There was a moderate, negative correlation (r = -0.45; p = 0.08) observed between RAMP scores and Ct value at the sample-level that slightly missed the required significance level. No significant association was identified between RAMP scores or aWHP and PCR test outcome (positive or negative). It was concluded that environmental sampling of the calving area and pre-weaned calf area has potential applications in the assessment of transmission risk on infected farms and could be used to monitor the efficacy of biosecurity measures over time. Further research conducted on a larger scale is required to support these results.
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Verdugo C, Marquez D, Paredes E, Moroni M, Navarrete-Talloni MJ, Tomckowiack C, Salgado M. Association between the severity of histopathological lesions and Mycobacterium avium subspecies paratuberculosis (MAP) molecular diversity in cattle in southern Chile. Front Vet Sci 2023; 9:962241. [PMID: 36713883 PMCID: PMC9878319 DOI: 10.3389/fvets.2022.962241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Accepted: 12/20/2022] [Indexed: 01/15/2023] Open
Abstract
The objective was to evaluate the association between the severity of histopathological lesions caused by Mycobacterium avium subspecies paratuberculosis (MAP) infection and the molecular diversity of this pathogen. Blood, ileum, and mesenteric lymph node samples were collected at slaughter, from 1,352 adult cattle [source population 1 (SP1)]. In addition, 42 dairy herds (n = 4,963 cows) were followed for 2 years, and samples from compatible paratuberculosis clinical cases [source population 2 (SP2)] were collected. MAP infection was confirmed using an ELISA test, liquid media culture, and PCR. Isolates were genotyped using five MIRU-VNTR markers. Tissues from confirmed samples were subjected to a histopathological examination. A histopathological severity score (HSS) system was developed and used to grade (0 to 5) the magnitude of lesions caused by MAP. In general, the HSS system assesses the number of foci and degree of macrophage infiltration, together with the presence of multinucleated giant cells (MGCs) and acid-fast bacilli (AFB), in addition to the fusion of the intestinal villi and hyperplasia of the crypts. Despite the large sampling effort, only 79 MAP isolates were successfully genotyped, where 19 different haplotypes were described. A mixed-effect Poisson regression model was used to assess the relationship between haplotypes and HSS values. The model was controlled by animal age, and the farm was used as a random effect. Haplotypes were grouped based on their relative frequency: the most frequent haplotype (group i, 49.4%), the second most frequent haplotype (group ii, 12.7%), and all other haplotypes (group iii, 37.9%). Model outputs indicated that group i had significantly higher HSS values than group iii. In addition, group i was also associated with higher optical density (OD) values of the ELISA test. These results support the existence of differences in pathogenicity between MAP haplotypes. However, results were based on a relatively small sample size; thus, these should be taken with caution. Despite this, study findings suggest that haplotypes would be associated with differences in disease progression, where the dominant haplotype tends to generate more severe lesions, which could be linked to a greater shed of MAP cells than non-dominant haplotypes, increasing their chances of transmission.
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Affiliation(s)
- Cristobal Verdugo
- Instituto de Medicina Preventiva Veterinaria, Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile,Center for the Surveillance and Evolution of Infectious Diseases (CSEID), Universidad Austral de Chile, Valdivia, Chile,*Correspondence: Cristobal Verdugo ✉
| | - Diego Marquez
- Instituto de Medicina Preventiva Veterinaria, Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile,Escuela de Graduados, Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile
| | - Enrique Paredes
- Instituto de Patología Animal, Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile
| | - Manuel Moroni
- Instituto de Patología Animal, Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile
| | | | - Camilo Tomckowiack
- Instituto de Medicina Preventiva Veterinaria, Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile
| | - Miguel Salgado
- Instituto de Medicina Preventiva Veterinaria, Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile
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Eshraghisamani R, Arrazuria R, Luo L, De Buck J. Evaluation of Mycobacterium avium subsp. paratuberculosis isocitrate lyase ( IcL) and ABC transporter ( BacA) knockout mutants as vaccine candidates. Front Cell Infect Microbiol 2023; 13:1149419. [PMID: 37065210 PMCID: PMC10098363 DOI: 10.3389/fcimb.2023.1149419] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2023] [Accepted: 02/28/2023] [Indexed: 04/18/2023] Open
Abstract
There has been little success in controlling Johne's disease, caused by Mycobacterium avium subsp. paratuberculosis, due to suboptimal diagnostics and the ineffectiveness of available vaccines. By knocking out BacA and IcL, genes required for MAP survival in dairy calves, two live-attenuated vaccine candidates were created. This study evaluated the host-specific attenuation of MAP IcL and BacA mutants in mouse and calf models, as well as the elicited immune responses. Deletion mutants were generated in MAP strain A1-157 through specialized transduction and found viable in vitro. First, the mutants' attenuation and elicited cytokine secretion were assessed in a mouse model, 3 weeks after intraperitoneal inoculation with MAP strains. Later, vaccine strains were assessed in a natural host infection model where calves received 109CFU oral dose of MAP wild-type or mutant strains at 2 weeks old. Transcription levels of cytokines in PBMCs were evaluated at 12-, 14-, and 16-weeks post-inoculation (WPI) and MAP colonization in tissue was assessed at 4.5 months after inoculation. Whereas both vaccine candidates colonized mouse tissues similarly to wild-type strain, both failed to persist in calf tissues. In either mouse or calf models, gene deletion did not reduce immunogenicity. Instead, inoculation with ΔBacA induced a greater upregulation of proinflammatory cytokines than ΔIcL and wild-type in both models and a greater expansion of cytotoxic and memory T-cells than uninfected control in calves. ΔBacA and wild-type strains significantly increased secretion of IP-10, MIG, TNFα, and RANTES in mice serum compared to uninfected control. This agreed with upregulation of IL-12, IL-17, and TNFα in calves inoculated with ΔBacA at all time points. The ΔBacA also gave rise to greater populations of CD4+CD45RO+, and CD8+ cells than uninfected control calves at 16 WPI. Low survival rate of MAP in macrophages co-incubated with PBMCs isolated from the ΔBacA group indicated that these cell populations are capable of killing MAP. Overall, the immune response elicited by ΔBacA is stronger compared to ΔIcL and it is maintained over two different models and over time in calves. Further investigation is warranted to evaluate the BacA mutant's protection against MAP infection as a live attenuated vaccine candidate.
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Seva J, Sanes JM, Mas A, Ramis G, Sánchez J, Párraga-Ros E. Prevalence of Mycobacterium avium Subsp. paratuberculosis in Feral Pigeons ( Columba livia) Associated with Difficulties Controlling Paratuberculosis in a Bovine Herd (Fighting Bull Breed). Animals (Basel) 2022; 12:ani12233314. [PMID: 36496835 PMCID: PMC9739979 DOI: 10.3390/ani12233314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 11/11/2022] [Accepted: 11/24/2022] [Indexed: 11/29/2022] Open
Abstract
A bovine herd with a high prevalence of paratuberculosis (PTB) cohabiting with a population of pigeons was studied (2011−2020). After finding the disease in 2011, annual monitoring was performed in 2012−2014 by obtaining blood samples for ELISA and intradermal tuberculinization (IT) tests for Mycobacterium avium subsp. paratuberculosis (MAP). Positive animals were eliminated. PTB prevalence dropped from 10% to 0% but returned to similar values (9.5%) after 6 years without tests. In all animals, Ac values according to the optical density (OD) determined by ELISA increased each year and could be used to isolate herds close to the cutoff point to improve PTB control. Possible reservoirs were considered after evaluating the little success of the PTB control program, and the population of feral pigeons was studied. Specifically, 10% of the pigeon population (n = 13) was necropsied. Samples of intestine, feces, and foot skin for PCR study for MAP and samples of terminal intestine for histopathological analysis were taken. Eleven pigeons were PCR-positive against MAP, in the intestine (10/11), foot skin (3/11), and feces (1/11). The presence of MAP in pigeon feet could demonstrate its role as a mechanical disseminator of PTB, while the presence in pigeon intestine and feces could also suggest its role as a reservoir.
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Affiliation(s)
- Juan Seva
- Department of Anatomy and Comparative Pathological Anatomy, Faculty of Veterinary Sciences, Regional Campus of International Excellence “Campus Mare Nostrum”, University of Murcia, 30100 Murcia, Spain
- Correspondence:
| | - J. Manuel Sanes
- Department of Anatomy and Comparative Pathological Anatomy, Faculty of Veterinary Sciences, Regional Campus of International Excellence “Campus Mare Nostrum”, University of Murcia, 30100 Murcia, Spain
| | - Alberto Mas
- Department of Anatomy and Comparative Pathological Anatomy, Faculty of Veterinary Sciences, Regional Campus of International Excellence “Campus Mare Nostrum”, University of Murcia, 30100 Murcia, Spain
| | - Guillermo Ramis
- Department of Animal Production, Faculty of Veterinary Sciences, Regional Campus of International Excellence “Campus Mare Nostrum”, University of Murcia, 30100 Murcia, Spain
| | - Joaquín Sánchez
- Department of Anatomy and Comparative Pathological Anatomy, Faculty of Veterinary Sciences, Regional Campus of International Excellence “Campus Mare Nostrum”, University of Murcia, 30100 Murcia, Spain
| | - Ester Párraga-Ros
- Department of Anatomy and Comparative Pathological Anatomy, Faculty of Veterinary Sciences, Regional Campus of International Excellence “Campus Mare Nostrum”, University of Murcia, 30100 Murcia, Spain
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First Report on Ovine Paratuberculosis in the Sudan: Diagnosis Using Different Techniques. Animals (Basel) 2022; 12:ani12233312. [PMID: 36496833 PMCID: PMC9737915 DOI: 10.3390/ani12233312] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2022] [Revised: 11/21/2022] [Accepted: 11/23/2022] [Indexed: 11/29/2022] Open
Abstract
Paratuberculosis (PTB) has been reported in the Sudan in cattle and goats for more than 50 years but has never been reported in sheep. However, suspicion of the disease in a breeding flock of sheep in Khartoum North locality was made due to a history of unknown cause of loss of weight. Blood and faecal samples were collected from all animals (N = 59): harvested sera were tested for anti-Mycobacterium avium subsp. paratuberculosis (MAP) antibodies by Enzyme Linked Immunosorbent Assay (ELISA); faeces were screened for acid-fast bacilli by Ziehl-Neelsen staining, tested for MAP DNA by recombinase polymerase amplification (RPA) and some faecal samples were cultured for MAP isolation. Typical MAP acid-fast bacilli were seen in 10.2% (6/59) of the faecal smears, 37.5% of the tested faecal samples (12/32) were positive for MAP DNA and only 3 (5.1%) animals were seropositive for MAP. MAP positive cultures were obtained from 2 out the 6 samples showing typical MAP acid-fast bacilli; the isolates were confirmed by real-time PCR and sequencing. As sheep are animals of utmost economic importance as the main export animals for the country, this first report of ovine PTB warrants special considerations and more investigations for planning control programmes of the disease.
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Badia-Bringué G, Canive M, Casais R, Blanco-Vázquez C, Amado J, Iglesias N, González A, Bascones M, Juste RA, Alonso-Hearn M. Evaluation of a droplet digital PCR assay for quantification of Mycobacterium avium subsp. paratuberculosis DNA in whole-blood and fecal samples from MAP-infected Holstein cattle. Front Vet Sci 2022; 9:944189. [PMID: 36246323 PMCID: PMC9563315 DOI: 10.3389/fvets.2022.944189] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Accepted: 09/02/2022] [Indexed: 01/17/2023] Open
Abstract
Bovine paratuberculosis (PTB) is an infectious disease that affects ruminants worldwide and is a burden on the dairy industry. PTB control measures include culling of Mycobacterium avium subsp. paratuberculosis (MAP)-infected animals from the herd and the enhancement of farm-biosecurity measures. Diagnostics tools for the direct detection of MAP are fecal real-time qPCR and bacteriological culture, the last one being considered the gold standard. However, both show limitations for detecting subclinical MAP-infected cattle with low bacterial load in feces and gut tissues. Droplet digital polymerase chain reaction (ddPCR) is a third-generation PCR method that shows high reproducibility for the quantification of low DNA copy numbers. The objective of this study was to design a ddPCR assay to detect and quantify a fragment of the F57 MAP-specific sequence in samples of naturally MAP-infected Holstein cattle. DNA was isolated from whole-blood and fecal samples from control cows with a negative ELISA and qPCR result (N = 75) and from cows with PTB-associated focal (N = 32), multifocal (N = 21), and diffuse lesions (N = 17) in gut tissues. After ddPCR, the DNA extracted from fecal samples of cows with diffuse lesions showed higher mean copies per microliter (13,791.2 copies/μl) than samples from cows with multifocal lesions (78.8 copies/μl), focal lesions (177.1 copies/μl) or control cows (4.8 copies/μl) (P ≤ 0.05). Significant differences in mean DNA copies/μl were also observed in the blood samples from cows with focal lesions (47.7 copies/μl) when compared with cows with multifocal and diffuse lesions; 18.1 and 12.4 copies/μl, respectively. Using a principal component analysis, the results of the fecal ddPCR clustered together with the results of a commercial ELISA for the specific detection of MAP antibodies, fecal and tissue qPCR, and bacteriological culture results. In contrast, blood ddPCR results clustered together with the results of an ELISA for the detection of a biomarker of subclinical PTB, the ABCA13 transporter. Blood ddPCR was the most sensitive tool (sensitivity 71%, specificity 100%) of all the quantitative methods used in the study for the detection of subclinical cows with focal lesions.
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Affiliation(s)
- Gerard Badia-Bringué
- Department of Animal Health, NEIKER- Basque Institute for Agricultural Research and Development, Basque Research and Technology Alliance, Derio, Spain
- Doctoral Program in Molecular Biology and Biomedicine, Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), Leioa, Spain
| | - Maria Canive
- Department of Animal Health, NEIKER- Basque Institute for Agricultural Research and Development, Basque Research and Technology Alliance, Derio, Spain
| | - Rosa Casais
- Center for Animal Biotechnology, Servicio Regional de Investigación y Desarrollo Agroalimentario, Deva, Spain
| | - Cristina Blanco-Vázquez
- Center for Animal Biotechnology, Servicio Regional de Investigación y Desarrollo Agroalimentario, Deva, Spain
| | - Javier Amado
- Department of Microbiology, Laboratorio Regional de Sanidad Animal del Principado de Asturias, Gijón, Spain
| | - Natalia Iglesias
- Center for Animal Biotechnology, Servicio Regional de Investigación y Desarrollo Agroalimentario, Deva, Spain
| | - Aitor González
- Department of Conservation of Natural Resources, NEIKER- Basque Institute for Agricultural Research and Development, Basque Research and Technology Alliance, Derio, Spain
| | - Mertxe Bascones
- Department of Animal Health, NEIKER- Basque Institute for Agricultural Research and Development, Basque Research and Technology Alliance, Derio, Spain
| | - Ramon A. Juste
- Department of Animal Health, NEIKER- Basque Institute for Agricultural Research and Development, Basque Research and Technology Alliance, Derio, Spain
| | - Marta Alonso-Hearn
- Department of Animal Health, NEIKER- Basque Institute for Agricultural Research and Development, Basque Research and Technology Alliance, Derio, Spain
- *Correspondence: Marta Alonso-Hearn
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Taylor EN, Beckmann M, Hewinson G, Rooke D, Sinclair LA, Mur LAJ. Metabolomic changes in lactating multiparous naturally MAP-infected Holstein-Friesian dairy cows suggest changes in mitochondrial energy pathways. Res Vet Sci 2022; 152:354-363. [PMID: 36108548 DOI: 10.1016/j.rvsc.2022.09.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Revised: 09/01/2022] [Accepted: 09/02/2022] [Indexed: 12/01/2022]
Abstract
Mycobacterium avium subspecies paratuberculosis (MAP) is the causative organism of Johne's Disease, a chronic intestinal infection of ruminants. Infected cows begin shedding MAP within the asymptomatic, subclinical stage of infection before clinical signs, such as weight loss, diarrhoea and reduced milk yields develop within the clinical stages of disease. Herein, we examine the milk metabolomic profiles of naturally MAP-infected Holstein-Friesian cows. The study used biobanked milk samples which were collected 73.4 ± 3.79 (early lactation) and 143 ± 3.79 (mean ± SE) (mid-lactation) days post-calving from 5 MAP-infected and 5 control multiparous cows. The milk metabolome was assessed using flow infusion electrospray high-resolution mass spectrometry (FIE-HRMS) for sensitive, non-targeted metabolite fingerprinting. Metabolite fingerprinting assessments using partial least squares discriminate analyses (PLS-DA) indicated that lactation stage was a larger source of variation than MAP status. Examining each lactation stage separately for changes associated to MAP-infection status identified 45 metabolites, 33 in early lactation and 12 in mid-lactation, but only 6 metabolites were targeted in both stages of lactation. Pathway enrichment analysis suggested that MAP affected the malate-aspartate shuffle during early lactation. Pearson's correlation analysis indicated relationships between milk lactose concentrations in mid-lactation and 6 metabolites that were tentatively linked to MAP-infection status. The targeted metabolites were suggestive of wider changes in the bioenergetic metabolism that appear to be an acceleration of the effects of progressing lactation in healthy cows. Additionally, milk lactose concentrations suggest that MAP reduces the availability of lactose derivatives.
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Affiliation(s)
| | | | - G Hewinson
- Centre of Excellence for Bovine Tuberculosis, Aberystwyth University, Ceredigion, UK
| | - D Rooke
- ProTEM Services Ltd, West Sussex, UK
| | - L A Sinclair
- Department of Agriculture and Environment, Harper Adams University, Newport, Shropshire, UK
| | - L A J Mur
- Aberystwyth University, Ceredigion, UK.
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Russo S, Giorgio G, Leo S, Arrigoni N, Garbarino C, Ricchi M. Validation of IS900- qPCR assay to assess the presence of Mycobacterium avium subs. paratuberculosis in faecal samples according to the OIE procedure. Prev Vet Med 2022; 208:105732. [DOI: 10.1016/j.prevetmed.2022.105732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 07/19/2022] [Accepted: 07/31/2022] [Indexed: 11/24/2022]
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Association between calf rearing technology and farm-level paratuberculosis infection in Hungarian dairy farms. Prev Vet Med 2022; 207:105719. [DOI: 10.1016/j.prevetmed.2022.105719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 07/17/2022] [Accepted: 07/18/2022] [Indexed: 11/23/2022]
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Sharma S, Gautam A, Singh S, Chaubey KK, Mehta R, Sharma M, Gupta S. Immunological and Hemato-biochemical alterations in diarrhoeic buffaloes screened for Mycobacterium avium subspecies paratuberculosis infection using ‘indigenous ELISA kit’. Comp Immunol Microbiol Infect Dis 2022; 87:101833. [DOI: 10.1016/j.cimid.2022.101833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 05/14/2022] [Accepted: 05/25/2022] [Indexed: 11/26/2022]
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Detection of Low MAP Shedder Prevalence in Large Free-Stall Dairy Herds by Repeated Testing of Environmental Samples and Pooled Milk Samples. Animals (Basel) 2022; 12:ani12111343. [PMID: 35681807 PMCID: PMC9179536 DOI: 10.3390/ani12111343] [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: 04/28/2022] [Revised: 05/21/2022] [Accepted: 05/22/2022] [Indexed: 11/24/2022] Open
Abstract
Simple Summary Paratuberculosis is a disease which affects ruminants worldwide. Many countries have implemented certification and monitoring systems to control the disease, particularly in dairy herds. Monitoring herds certified as paratuberculosis non-suspect is an important component of paratuberculosis herd certification programs. The challenge is to detect the introduction or reintroduction of the infectious agent as early as possible with reasonable efforts but high certainty. In our study, we evaluated different low-cost testing schemes in herds where the share of infected animals was low, resulting in a low within-herd prevalence of animals shedding the bacteria that causes paratuberculosis in their feces. The test methods used were repeated pooled milk samples and fecal samples from the barn environment. Our study showed that numerous repetitions of different samples are necessary to monitor such herds with sufficiently high certainty. In the case of herds with a very low prevalence, our study showed that a combination of different sampling approaches is required. Abstract An easy-to-use and affordable surveillance system is crucial for paratuberculosis control. The use of environmental samples and milk pools has been proven to be effective for the detection of Mycobacterium avium subsp. paratuberculosis (MAP)-infected herds, but not for monitoring dairy herds certified as MAP non-suspect. We aimed to evaluate methods for the repeated testing of large dairy herds with a very low prevalence of MAP shedders, using different sets of environmental samples or pooled milk samples, collected monthly over a period of one year in 36 herds with known MAP shedder prevalence. Environmental samples were analyzed by bacterial culture and fecal PCR, and pools of 25 and 50 individual milk samples were analyzed by ELISA for MAP-specific antibodies. We estimated the cumulative sensitivity and specificity for up to twelve sampling events by adapting a Bayesian latent class model and taking into account the between- and within-test correlation. Our study revealed that at least seven repeated samplings of feces from the barn environment are necessary to achieve a sensitivity of 95% in herds with a within-herd shedder prevalence of at least 2%. The detection of herds with a prevalence of less than 2% is more challenging and, in addition to numerous repetitions, requires a combination of different samples.
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Field NL, McAloon CG, Gavey L, Mee JF. Mycobacterium avium subspecies paratuberculosis infection in cattle - a review in the context of seasonal pasture-based dairy herds. Ir Vet J 2022; 75:12. [PMID: 35590382 PMCID: PMC9121589 DOI: 10.1186/s13620-022-00217-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 04/24/2022] [Indexed: 11/17/2022] Open
Abstract
Johne’s disease is an infectious disease affecting cattle, other ruminants and non-ruminant wildlife worldwide, caused by Mycobacterium avium subspecies paratuberculosis (MAP). This review provides an up-to-date concise overview of the pathogenesis of MAP, the significance of Johne’s disease in cattle and the use of diagnostic testing at both animal and herd level in the context of seasonal pasture-based herds. While MAP can only replicate intracellularly, the bacterium is sufficiently robust to survive for months in the environment. Transmission of MAP is mostly via the faecal-oral route, however in-utero transmission in also possible. The bacteria evade the immune system by persisting in macrophages in the small intestine submucosa, with this latent stage of infection lasting, in most cases, for at least two years before bacterial shedding and clinical signs begin. The slowly progressive nature of MAP infection, poor performance of diagnostic tests and management systems that expose susceptible calves to infection make control of Johne’s disease challenging, particularly in seasonal calving herds. Testing of individual animals provides little assurance for farmers and vets due to the poor sensitivity and, in the case of ELISA, imperfect specificity of the available tests. Repeated herd-level testing is utilised by the IJCP to detect infected herds, identify high risk animals, and provide increasing confidence that test-negative herds are free of infection. The IJCP aims to control the spread of Johne’s disease in cattle in Ireland, in order to protect non-infected herds, limit the economic and animal health impact of the disease, improve calf health and reassure markets of Johne’s disease control in Ireland.
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Affiliation(s)
- Niamh L Field
- Animal and Bioscience Research Department, Teagasc, Moorepark Research Centre, Fermoy, Co. Cork, P61 P302, Ireland. .,UCD School of Veterinary Medicine, University College Dublin, Belfield, Dublin, D04 W6F6, Ireland.
| | - Conor G McAloon
- UCD School of Veterinary Medicine, University College Dublin, Belfield, Dublin, D04 W6F6, Ireland
| | | | - John F Mee
- Animal and Bioscience Research Department, Teagasc, Moorepark Research Centre, Fermoy, Co. Cork, P61 P302, Ireland
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Taylor EN, Beckmann M, Markey BK, Gordon SV, Hewinson G, Rooke D, Mur LAJ. Metabolomic changes in Mycobacterium avium subsp. paratuberculosis (MAP) challenged Holstein-Friesian cattle highlight the role of serum amino acids as indicators of immune system activation. Metabolomics 2022; 18:21. [PMID: 35320420 PMCID: PMC8942901 DOI: 10.1007/s11306-022-01876-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Accepted: 02/23/2022] [Indexed: 10/26/2022]
Abstract
INTRODUCTION Paratuberculosis, commonly known as Johne's disease, is a chronic granulomatous infection of ruminants caused by Mycobacterium avium subspecies paratuberculosis (MAP). Clinical signs, including reduced milk yields, weight loss and diarrhoea, are typically absent until 2 to 6 years post exposure. OBJECTIVES To identify metabolomic changes profiles of MAP challenged Holstein-Friesian (HF) cattle and correlate identified metabolites to haematological and immunological parameters. METHODS At approximately 6 weeks of age, calves (n = 9) were challenged with 3.8 × 109 cells of MAP (clinical isolate CIT003) on 2 consecutive days. Additional unchallenged calves (n = 9) formed the control group. The study used biobanked serum from cattle sampled periodically from 3- to 33-months post challenge. The assessment of sera using flow infusion electrospray high resolution mass spectrometry (FIE-HRMS) for high throughput, sensitive, non-targeted metabolite fingerprinting highlighted differences in metabolite levels between the two groups. RESULTS In total, 25 metabolites which were differentially accumulated in MAP challenged cattle were identified, including 20 which displayed correlation to haematology parameters, particularly monocyte levels. CONCLUSION The targeted metabolites suggest shifts in amino acid metabolism that could reflect immune system activation linked to MAP and as well as differences in phosphocholine levels which could reflect activation of the Th1 (tending towards pro-inflammatory) immune response. If verified by future work, selected metabolites could be used as biomarkers to diagnose and manage MAP infected cattle.
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Affiliation(s)
| | | | - Bryan K Markey
- School of Veterinary Medicine, University College Dublin, Dublin, Ireland
| | - Stephen V Gordon
- School of Veterinary Medicine, University College Dublin, Dublin, Ireland
| | - Glyn Hewinson
- Centre of Excellence for Bovine Tuberculosis, Aberystwyth University, Ceredigion, UK
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Ibeagha-Awemu EM, Bissonnette N, Do DN, Dudemaine PL, Wang M, Facciuolo A, Griebel P. Regionally Distinct Immune and Metabolic Transcriptional Responses in the Bovine Small Intestine and Draining Lymph Nodes During a Subclinical Mycobacterium avium subsp. paratuberculosis Infection. Front Immunol 2022; 12:760931. [PMID: 34975852 PMCID: PMC8714790 DOI: 10.3389/fimmu.2021.760931] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Accepted: 10/18/2021] [Indexed: 11/19/2022] Open
Abstract
Mycobacterium avium subsp. paratuberculosis (MAP) is the causative infectious agent of Johne’s disease (JD), an incurable granulomatous enteritis affecting domestic livestock and other ruminants around the world. Chronic MAP infections usually begin in calves with MAP uptake by Peyer’s patches (PP) located in the jejunum (JE) and ileum (IL). Determining host responses at these intestinal sites can provide a more complete understanding of how MAP manipulates the local microenvironment to support its long-term survival. We selected naturally infected (MAPinf, n=4) and naive (MAPneg, n=3) cows and transcriptionally profiled the JE and IL regions of the small intestine and draining mesenteric lymph nodes (LN). Differentially expressed (DE) genes associated with MAP infection were identified in the IL (585), JE (218), jejunum lymph node (JELN) (205), and ileum lymph node (ILLN) (117). Three DE genes (CD14, LOC616364 and ENSBTAG00000027033) were common to all MAPinf versus MAPneg tissues. Functional enrichment analysis revealed immune/disease related biological processes gene ontology (GO) terms and pathways predominated in IL tissue, indicative of an activated immune response state. Enriched GO terms and pathways in JE revealed a distinct set of host responses from those detected in IL. Regional differences were also identified between the mesenteric LNs draining each intestinal site. More down-regulated genes (52%) and fewer immune/disease pathways (n=5) were found in the ILLN compared to a higher number of up-regulated DE genes (56%) and enriched immune/disease pathways (n=13) in the JELN. Immunohistochemical staining validated myeloid cell transcriptional changes with increased CD172-positive myeloid cells in IL and JE tissues and draining LNs of MAPinf versus MAPneg cows. Several genes, GO terms, and pathways related to metabolism were significantly DE in IL and JE, but to a lesser extent (comparatively fewer enriched metabolic GO terms and pathways) in JELN suggesting distinct regional metabolic changes in IL compared to JE and JELN in response to MAP infection. These unique tissue- and regional-specific differences provides novel insight into the dichotomy in host responses to MAP infection that occur throughout the small intestine and mesenteric LN of chronically MAP infected cows.
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Affiliation(s)
- Eveline M Ibeagha-Awemu
- Sherbrooke Research and Development Centre, Agriculture and Agri-Food Canada, Sherbrooke, QC, Canada
| | - Nathalie Bissonnette
- Sherbrooke Research and Development Centre, Agriculture and Agri-Food Canada, Sherbrooke, QC, Canada
| | - Duy N Do
- Sherbrooke Research and Development Centre, Agriculture and Agri-Food Canada, Sherbrooke, QC, Canada
| | - Pier-Luc Dudemaine
- Sherbrooke Research and Development Centre, Agriculture and Agri-Food Canada, Sherbrooke, QC, Canada
| | - Mengqi Wang
- Sherbrooke Research and Development Centre, Agriculture and Agri-Food Canada, Sherbrooke, QC, Canada
| | - Antonio Facciuolo
- Vaccine and Infectious Disease Organization (VIDO), University of Saskatchewan, Saskatoon, SK, Canada
| | - Philip Griebel
- Vaccine and Infectious Disease Organization (VIDO), University of Saskatchewan, Saskatoon, SK, Canada.,School of Public Health, University of Saskatchewan, Saskatoon, SK, Canada
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Variation in the Performance of Different Batches of Two Mycobacterium avium Subspecies paratuberculosis Antibody ELISAs Used for Pooled Milk Samples. Animals (Basel) 2022; 12:ani12040442. [PMID: 35203150 PMCID: PMC8868366 DOI: 10.3390/ani12040442] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 01/29/2022] [Accepted: 02/10/2022] [Indexed: 02/04/2023] Open
Abstract
Simple Summary This article explores variation in the performance of different batches of tests for the detection of antibodies against the ruminant pathogen Mycobacterium avium subspecies paratuberculosis (MAP) in milk. The results indicate that variation is present and that it has sources mainly in the manufacturing process of the test kits and, to a lesser degree, in the test laboratories. Abstract Regionally, the monitoring of paratuberculosis at the herd level is performed by the detection of specific antibodies in pooled milk samples by ELISA. The negative/positive cut-off S/P values applied for pooled milk samples are low and particularly vulnerable to variation in the test performance. In this study, a batch variation in the test performance of two ELISA tests was assessed to identify consequences for sample classification. A total of 72 pooled milk samples (50 from MAP-infected herds, 22 from one MAP-non-infected herd) were analyzed using three different batches, each of two different MAP antibody ELISA tests (A and B). Receiver operating characteristic (ROC) analysis was performed, with the results of each batch, S/P values of the samples and optical density (OD) readings of the negative and positive control samples included in the kits being compared between the batches of one test. ROC analysis revealed a considerable variation in the test performance of the batches of the two individual tests, caused by differences in the S/P values of the samples and resulting in different sensitivities at a specificity of 100%. Major sources of variation originate from the manufacturing processes of test batches. These sources have to be better controlled, and the test performance has to be revisited regularly.
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Weber MF, Aalberts M, Dijkstra T, Schukken YH. Predicting Positive ELISA Results in Dairy Herds with a Preferred Status in a Paratuberculosis Control Program. Animals (Basel) 2022; 12:ani12030384. [PMID: 35158707 PMCID: PMC8833702 DOI: 10.3390/ani12030384] [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: 12/29/2021] [Revised: 01/23/2022] [Accepted: 01/26/2022] [Indexed: 12/04/2022] Open
Abstract
Dairy herds participating in the Dutch milk quality assurance program for paratuberculosis are assigned a herd status on the basis of herd examinations by ELISA of individual serum or milk samples, followed by an optional confirmatory fecal PCR. Test-negative herds are assigned Status A; the surveillance of these herds consists of biennial herd examinations. Farmers falsely believing that their Status A herds are Map-free may inadvertently refrain from preventive measures. Therefore, we aimed to develop a predictive model to alert Status A farmers at increased risk of future positive ELISA results. Using data of 8566 dairy herds with Status A in January 2016, two logistic regression models were built, with the probabilities of ≥1 or ≥2 positive samples from January 2017–June 2019 as dependent variables, and province, soil type, herd size, proportion of cattle born elsewhere, time since previous positive ELISA results, and the 95th percentile of the S/P ratios in 2015–2016, as explanatory variables. As internal validation, both models were applied to predict positive ELISA results from January 2019–June 2021, in 8026 herds with Status A in January 2019. The model predicting ≥1 positive sample had an area under the receiver-operating-characteristics curve of 0.76 (95% CI: 0.75, 0.77). At a cut-off predicted probability πc = 0.40, 25% of Status A herds would be alerted with positive and negative predictive values of 0.52 and 0.83, respectively. The model predicting ≥2 positive samples had lower positive, but higher negative, predictive values. This study indicates that discrimination of Status A herds with high and low risks of future positive ELISA results is feasible. This might stimulate farmers with the highest risks to take additional measures to control any undetected Map infections.
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Affiliation(s)
- Maarten F. Weber
- Royal GD, P.O. Box 9, 7400 AA Deventer, The Netherlands; (M.A.); (T.D.); (Y.H.S.)
- Department of Population Health Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 7, 3584 CL Utrecht, The Netherlands
- Correspondence:
| | - Marian Aalberts
- Royal GD, P.O. Box 9, 7400 AA Deventer, The Netherlands; (M.A.); (T.D.); (Y.H.S.)
| | - Thomas Dijkstra
- Royal GD, P.O. Box 9, 7400 AA Deventer, The Netherlands; (M.A.); (T.D.); (Y.H.S.)
| | - Ynte H. Schukken
- Royal GD, P.O. Box 9, 7400 AA Deventer, The Netherlands; (M.A.); (T.D.); (Y.H.S.)
- Department of Population Health Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 7, 3584 CL Utrecht, The Netherlands
- Quantitative Veterinary Epidemiology, Department of Animal Sciences, Wageningen University, P.O. Box 338, 6700 AH Wageningen, The Netherlands
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Field NL, Mee JF, McAloon CG. Characteristics (sensitivity and specificity) of herd-level diagnostic tests for Mycobacterium avium subspecies paratuberculosis in cattle - A systematic review. Vet J 2022; 279:105786. [PMID: 35026383 DOI: 10.1016/j.tvjl.2022.105786] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 01/07/2022] [Accepted: 01/07/2022] [Indexed: 11/28/2022]
Abstract
Diagnostic tests for Johne's disease in cattle are characterised by poor sensitivity and often imperfect specificity at the animal level. Because farmers and veterinarians have limited assurance or confidence from results of testing individual animals for Mycobacterium avium subsp. paratuberculosis (MAP), control programmes based on whole herd-level testing provide the best framework for classifying herds. At the herd level, there is a diverse range of testing options for MAP based on both direct and indirect testing of individual and pooled samples. The most common measures of herd test performance, herd sensitivity (HSe) and herd specificity (HSp), are important for decision-making in herd test selection, for estimating prevalence and as inputs for simulation studies. This systematic review investigated the results of herd test evaluations for MAP in cattle, through a comprehensive search of the literature and a systematic four-stage screening process to identify relevant publications. Forty-six publications with relevant results were eligible for inclusion in the final review, containing evaluations of whole-herd ELISA serological testing, bulk milk tank ELISA, culture, PCR and phage testing, pooled faecal testing and environmental sample testing. Data extracted from each publication included sample populations, methods of analysis, reference tests, cut-off points, HSe and HSp. Direct comparisons between the reported HSe and HSp estimates of different studies is challenging due to the variations in herd prevalence and test protocols used. The data in this systematic review will benefit decision-makers and researchers and highlights knowledge gaps requiring further research.
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Affiliation(s)
- N L Field
- Animal and Bioscience Research Department, Teagasc, Moorepark Research Centre, Fermoy, Co. Cork, P61 P302, Ireland.
| | - J F Mee
- Animal and Bioscience Research Department, Teagasc, Moorepark Research Centre, Fermoy, Co. Cork, P61 P302, Ireland
| | - C G McAloon
- UCD School of Veterinary Medicine, University College Dublin, Belfield, Dublin D04 W6F6, Ireland
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Capacity of a Bayesian model to detect infected herds using disease dynamics and risk factor information from surveillance programmes: A simulation study. Prev Vet Med 2022; 200:105582. [DOI: 10.1016/j.prevetmed.2022.105582] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 12/09/2021] [Accepted: 01/20/2022] [Indexed: 11/18/2022]
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Paratuberculosis: The Hidden Killer of Small Ruminants. Animals (Basel) 2021; 12:ani12010012. [PMID: 35011118 PMCID: PMC8749836 DOI: 10.3390/ani12010012] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 12/02/2021] [Accepted: 12/15/2021] [Indexed: 12/15/2022] Open
Abstract
Simple Summary Paratuberculosis is a chronic disease of ruminants and many non-ruminant animals caused by the bacterium Mycobacterium avium subsp. paratuberculosis. Affected animals show diarrhoea, loss of weight, and decreased production performance with consequent economic losses. This bacterium has been detected in some humans suffering from a chronic intestinal disease known as Crohn’s disease (CD) and, therefore, some scientists believe that CD is the human form of paratuberculosis. The disease in small ruminants has been reported in all continents, with goats being more susceptible than sheep. The clinical signs of the disease in goats are not so obvious as often do not show signs of diarrhoea, and the animal may die before being finally diagnosed. In Africa and many developing countries, paratuberculosis is described as a “neglected disease” particularly in small ruminants, which play a vital role in the livelihood of poor communities. This overview attempts to highlight the current research and gaps on this disease in small ruminants to draw more attention for further studies on diagnosis, prevention and control. Abstract Paratuberculosis (PTB) is a contagious and chronic enteric disease of ruminants and many non-ruminants caused by Mycobacterium avium subsp. paratuberculosis (MAP), and is characterised by diarrhoea and progressive emaciation with consequent serious economic losses due to death, early culling, and reduced productivity. In addition, indirect economic losses may arise from trade restrictions. Besides being a production limiting disease, PTB is a potential zoonosis; MAP has been isolated from Crohn’s disease patients and was associated with other human diseases, such as rheumatoid arthritis, Hashimoto’s thyroiditis, Type 1 diabetes, and multiple sclerosis. Paratuberculosis in sheep and goats may be globally distributed though information on the prevalence and economic impact in many developing countries seem to be scanty. Goats are more susceptible to infection than sheep and both species are likely to develop the clinical disease. Ingestion of feed and water contaminated with faeces of MAP-positive animals is the common route of infection, which then spreads horizontally and vertically. In African countries, PTB has been described as a “neglected disease”, and in small ruminants, which support the livelihood of people in rural areas and poor communities, the disease was rarely reported. Prevention and control of small ruminants’ PTB is difficult because diagnostic assays demonstrate poor sensitivity early in the disease process, in addition to the difficulties in identifying subclinically infected animals. Further studies are needed to provide more insight on molecular epidemiology, transmission, and impact on other animals or humans, socio-economic aspects, prevention and control of small ruminant PTB.
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Effect of selected single nucleotide polymorphisms in SLC11A1, ANKRA2, IFNG and PGLYRP1 genes on host susceptibility to Mycobacterium avium subspecies paratuberculosis infection in Indian cattle. Vet Res Commun 2021; 46:209-221. [PMID: 34718924 DOI: 10.1007/s11259-021-09849-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 10/10/2021] [Indexed: 10/19/2022]
Abstract
Paratuberculosis (PTB) is a chronic infectious enteritis of ruminants, caused by Mycobacterium avium subspecies paratuberculosis (MAP) that brings huge economic loss to the dairy farmers. The study was conducted to explore the association of selected SNPs in IFNG, SLC11A1, ANKRA2 and PGLYRP1 genes with resistance to PTB disease in Indian cattle population. A case-control resource population was established based on the results of diagnostic tests used for detection of MAP infection status viz. ELISA, Johnin PPD test, faecal microscopy and IS900 blood PCR. The PCR-RFLP method was used for genotyping of SNPs. SNPs rs109453173 in SLC11A1, rs110853455 in IFNG and rs41933863 in ANKRA2 genes were significantly (P<0.05) associated with resistance to MAP infection. For SNP rs109453173, GG genotype and G allele was found to be associated with resistance against MAP infection than CC and CG genotypes and C allele, respectively. For SNP rs110853455, AG genotype was found to be associated with susceptibility to MAP infection than AA and GG genotype. For SNP rs41933863, the AG genotype provided three and six times more resistance against MAP infection than GG and AA genotype. The results of this study are suggestive of SNPs rs109453173, rs110853455 and rs41933863 as potential markers for screening MAP resistant cattle and a breeding programme favouring GG genotype and G allele for rs109453173, AG genotype for rs41933863 and against AG genotype for rs110853455 might confer resistance against MAP infection in Indian cattle. However, investigation of these SNPs in an independent and larger population will warrant the strength of association for resistance against MAP infection in cattle.
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Ezanno P, Arnoux S, Joly A, Vermesse R. Rewiring cattle trade movements helps to control bovine paratuberculosis at a regional scale. Prev Vet Med 2021; 198:105529. [PMID: 34808579 DOI: 10.1016/j.prevetmed.2021.105529] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 10/18/2021] [Accepted: 10/28/2021] [Indexed: 12/12/2022]
Abstract
Paratuberculosis is a worldwide disease mainly introduced through trade. Due to the low sensitivity of diagnostic tests, it is difficult to protect herds from purchasing infected animals. Our objective was to assess if rewiring trade networks to promote risk-based movements could reduce the spread of Mycobacterium avium subsp. paratuberculosis (MAP) between dairy cattle herds at a regional scale. Two levels of control strategies were assessed. At the between-herd scale, trade rewiring aimed to prevent animals from high-risk herds moving into low-risk herds. At the within-herd scale, complementary additional measures were considered based on the herd infection status, aiming to limit the within-herd spread by reducing calf exposure to adult faeces and culling more rapidly after positive test results. We used a stochastic individual-based and between-herd mechanistic epidemiological model adapted to the 12,857 dairy cattle herds located in Brittany, western France. We compared the regional spread of MAP using observed trade movements against a rewiring algorithm rendering trade movements risk-based. All females over two years old were tested. Based on the results, and taking into account the low test sensitivity, herds were annually assigned one of three statuses: A if the estimated true prevalence was below 7%, B if it ranged from 7 to 21 %, C otherwise. We also identified herds with a high probability of being MAP-free (AAA herds that had obtained an A status over three consecutive years) to assess the effect of decreasing their risk of purchasing infected animals on MAP regional spread. We showed that movement rewiring to prevent the sale of animals from high to low-prevalence herds reduces MAP regional spread. Targeting AAA herds made it possible to minimize the control effort to decrease MAP regional spread. However, animals purchased by AAA herds should have a moderate to high probability of being MAP-free, especially if the risk of purchasing animals from herds of unknown status cannot be managed. Improved hygiene and early culling of positive animals were relevant complementary on-farm control options to further decrease MAP spread. Future studies should identify how to define herd statuses to target optimal control measure combinations that could reduce the spread of MAP on a regional scale most effectively.
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Affiliation(s)
- P Ezanno
- INRAE, Oniris, BIOEPAR, 44300, Nantes, France.
| | - S Arnoux
- INRAE, Oniris, BIOEPAR, 44300, Nantes, France
| | - A Joly
- Groupement de Défense Sanitaire de Bretagne, 56019, Vannes, France
| | - R Vermesse
- Groupement de Défense Sanitaire de Bretagne, 56019, Vannes, France
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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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Hosseiniporgham S, Biet F, Ganneau C, Bannantine JP, Bay S, Sechi LA. A Comparative Study on the Efficiency of Two Mycobacterium avium subsp. paratuberculosis (MAP)-Derived Lipopeptides of L3P and L5P as Capture Antigens in an In-House Milk ELISA Test. Vaccines (Basel) 2021; 9:vaccines9090997. [PMID: 34579234 PMCID: PMC8471605 DOI: 10.3390/vaccines9090997] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 09/01/2021] [Accepted: 09/02/2021] [Indexed: 02/07/2023] Open
Abstract
Mycobacterium avium subsp. paratuberculosis (MAP) surface-exposed lipopeptides could be specific capture-antigen molecules targeting antibodies against MAP, in milk, through ELISA. Previous studies have revealed that MAP strains, isolated from sheep (S) or cow (C), could produce specific lipopeptides, L3P or L5P, respectively. In this study, we used L3P and L5P as capture antigens in an in-house milk ELISA (H-MELISA) to assess how these antigens perform, in comparison with other ELISA tests, on well-defined milk samples from MAP-infected sheep. The overall positivity rates of H-MELISA via L3P and L5P varied by the source of milk samples, in which, at bulk-tank-milk (BTM) level, the majority of positive cases (63.83%) reacted more against L5P, whereas a predominant number (69.14%) of milk samples were more responsive against L3P at the individual level. To clarify whether the positivity status of milk samples in H-MELISA L3P/L5P were predictive of MAP strain-types (S/C), strain-typing was carried out using PCR IS1311-restriction enzyme analysis. Although the presence of three MAP strains (S/C/bison types) was detected among the milk samples, the C-type (46.67%) and S-type (75%) MAP strains were detected with higher incidence among BTMs and individual milk samples, respectively. However, further examination on the H-MELISA L3P/L5P-positivity pattern of each C/S-type-MAP sample revealed that some samples had a reverse reactivity against both L3P and L5P. These results could be the consequence of either cross-reactivity between L3P and L5P (due to the similarity in the structures of the two epitopes) or simply a within-herd mixed infection with MAP strains of C and S types. These findings suggest that lipopeptide antigens could contribute a diagnostic test with optimal performance, considering the diversity of MAP strains.
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Affiliation(s)
| | - Franck Biet
- UMR1282, Infectiologie et Santé Publique (ISP-311), INRAE Centre Val de Loire, 37380 Nouzilly, France;
| | - Christelle Ganneau
- Unité de Chimie Des Biomolécules, Département de Biologie Structurale et Chimie, Institut Pasteur, 75015 Paris, France; (C.G.); (S.B.)
- CNRS UMR 3523, 75015 Paris, France
| | - John P. Bannantine
- USDA-Agricultural Research Service, National Animal Disease Center, Ames, IA 50010, USA;
| | - Sylvie Bay
- Unité de Chimie Des Biomolécules, Département de Biologie Structurale et Chimie, Institut Pasteur, 75015 Paris, France; (C.G.); (S.B.)
- CNRS UMR 3523, 75015 Paris, France
| | - Leonardo A. Sechi
- Dipartimento di Scienze Biomediche, Università di Sassari, 07100 Sassari, Italy;
- SC Microbiologia e Virologia, Azienda Ospedaliera Universitaria, 07100 Sassari, Italy
- Mediterraneam Center for Disease Control, 07100 Sassari, Italy
- Correspondence:
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Didkowska A, Krajewska-Wędzina M, Klich D, Prolejko K, Orłowska B, Anusz K. The Risk of False-Positive Serological Results for Paratuberculosis in Mycobacterium bovis-Infected Cattle. Pathogens 2021; 10:pathogens10081054. [PMID: 34451518 PMCID: PMC8399313 DOI: 10.3390/pathogens10081054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 08/11/2021] [Accepted: 08/18/2021] [Indexed: 11/19/2022] Open
Abstract
Both bovine tuberculosis (BTB) and paratuberculosis (paraTB) continue to cause significant economic losses in cattle breeding; in addition, their etiological agents have zoonotic potential. Although the diagnostics of both diseases are still being improved, problems still remain, such as the potential for cross-reactivity to the antigens used in tests. The aim of the present study was to confirm whether animals known to harbor Mycobacterium bovis antibodies are at increased risk of yielding positive results in paraTB serotesting and, additionally, to verify the accuracy of three commonly used methods for confirming M. bovis infection: ELISA, the tuberculin skin test (TST), and the presence of gross lesions. Material was collected from 98 dairy cattle suspected of BTB due to TST-positive results. During postmortem examination, gross lesions were assessed visually. Blood, lymph nodes, and TB-suspected organs were collected. Serum was obtained from the collected blood and tested serologically for TB and paraTB. The tissues underwent standard microbiological testing for M. tuberculosis complex. Among the 98 TST-positive individuals, tuberculous gross lesions were detected in 57 (58.1%), MTBC were isolated in 83 (84.7%), and the ELISA test was positive for 21 (21.4%). None of the lesions characteristic for paraTB were detected. The chance of obtaining a positive TB result by ELISA was seven times higher using the ELISA-paraTB method; hence, there is a significant risk of obtaining false-positive serological results for paraTB in M. bovis-infected cattle. However, the hypothesis that infection of M. bovis or prior TST performance may have boosted the host immune response and therefore increased the sensitivity of the paraTB-ELISA cannot be excluded.
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Affiliation(s)
- Anna Didkowska
- Department of Food Hygiene and Public Health Protection, Institute of Veterinary Medicine, Warsaw University of Life Sciences (SGGW), 02-776 Warsaw, Poland; (K.P.); (B.O.); (K.A.)
- Correspondence:
| | | | - Daniel Klich
- Department of Animal Genetics and Conservation, Institute of Animal Sciences, Warsaw University of Life Sciences (SGGW), 02-786 Warsaw, Poland;
| | - Kinga Prolejko
- Department of Food Hygiene and Public Health Protection, Institute of Veterinary Medicine, Warsaw University of Life Sciences (SGGW), 02-776 Warsaw, Poland; (K.P.); (B.O.); (K.A.)
| | - Blanka Orłowska
- Department of Food Hygiene and Public Health Protection, Institute of Veterinary Medicine, Warsaw University of Life Sciences (SGGW), 02-776 Warsaw, Poland; (K.P.); (B.O.); (K.A.)
| | - Krzysztof Anusz
- Department of Food Hygiene and Public Health Protection, Institute of Veterinary Medicine, Warsaw University of Life Sciences (SGGW), 02-776 Warsaw, Poland; (K.P.); (B.O.); (K.A.)
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Jain M, Kumar A, Polavarapu R, Gupta S, Aseri GK, Sharma D, Sohal JS. Development of rELISA using novel markers for the diagnosis of paratuberculosis. J Immunol Methods 2021; 497:113105. [PMID: 34298067 DOI: 10.1016/j.jim.2021.113105] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Revised: 07/15/2021] [Accepted: 07/16/2021] [Indexed: 11/25/2022]
Abstract
Paratuberculosis is one of the complex livestock infections whose control has largely been hampered due to the lack of efficacious diagnostics. Present study optimized plate ELISA assay for the diagnosis and screening of paratuberculosis using recombinant secretory proteins. Five secretory antigens (2677c, 3547c, 4308c, 1693c, and 2168c) were produced in the recombinant system using the E. coli host and used for the optimization of the assay. These proteins were selected because of their prior proven specificity and antigenicity as humoral immunity markers. The assay was first optimized using traditional ELISA reader and then the performance was evaluated using a handheld ELISA reader. Findings were identical in both traditional ELISA reader as well as handheld ELISA reader. Optimized ELISA was found reproducible using different batches of the recombinant antigens as well as in terms of the inter and intra assay %CV values. The present ELISA has a sensitivity and specificity of 91.6% and 100%, respectively. Also, rELISA revealed AUCROC and Youden index J of 0.95 and 0.91, respectively. In conclusion, assay conditions of MAP-recombinant protein-based ELISA were optimized and the optimized ELISA ODs can be read using portable handheld ELISA reader. Thereby, opening a future window to develop assay for onsite testing.
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Affiliation(s)
- Mukta Jain
- Amity Center for Mycobacterial Disease Research, Amity University Rajasthan, Kant-Kalwar, Delhi-Jaipur Highway, NH11C, Jaipur 303 002, India
| | - Amit Kumar
- Department of Immunology & Defense Mechanism, Sardar Vallabh Bhai Patel University of Agriculture & Technology (SVPUAT), Modipurum, Meerut 250 110, India
| | - Rathnagiri Polavarapu
- Genomix Molecular Diagnostics (P) Ltd, 5-36/207 Prasanthnagar, Kukatpally, Hyderabad 500 072, India
| | - Saurabh Gupta
- Department of Biotechnology, Institute of Applied Sciences & Humanities, GLA University, 17 KM Stone, NH-2, Post- Chaumuhan, Mathura, U.P. 281 406, India
| | - G K Aseri
- Amity Center for Mycobacterial Disease Research, Amity University Rajasthan, Kant-Kalwar, Delhi-Jaipur Highway, NH11C, Jaipur 303 002, India
| | - Deepansh Sharma
- Amity Center for Mycobacterial Disease Research, Amity University Rajasthan, Kant-Kalwar, Delhi-Jaipur Highway, NH11C, Jaipur 303 002, India
| | - Jagdip Singh Sohal
- Amity Center for Mycobacterial Disease Research, Amity University Rajasthan, Kant-Kalwar, Delhi-Jaipur Highway, NH11C, Jaipur 303 002, India.
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Pourmahdi Borujeni M, Haji Hajikolaei MR, Ghorbanpoor M, Elhaei Sahar H, Bagheri S, Roveyshedzadeh S. Comparison of Mycobacterium avium subsp. paratuberculosis infection in cattle, sheep and goats in the Khuzestan Province of Iran: Results of a preliminary survey. Vet Med Sci 2021; 7:1970-1979. [PMID: 34228398 PMCID: PMC8464266 DOI: 10.1002/vms3.559] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Background Paratuberculosis or Johne's disease, the chronic infectious granulomatous enteritis of ruminants, is a worldwide infection, which is caused by Mycobacterium avium subsp. paratuberculosis (MAP). The most common symptoms of this disease in cattle are loss of milk production, weight loss and diarrhoea, whereas in sheep and goats, the symptoms are emaciation, anorexia and severe disability. Objectives The aim of this study was to compare the seroprevalence of MAP in cattle, sheep and goats in the southwest of Iran. Methods Blood samples were randomly collected from 530 cattle, 568 sheep and 368 goats in southwest of Iran. Sera were tested by a commercial ELISA kit (ID vet; ID Screen® Paratuberculosis Indirect) for detection of antibodies of MAP. Results Overall apparent and true seroprevalence rate of MAP was 6.00% (95% CI: 4.90%–7.30%) and 13.25% (95% CI: 11.55%– 14.95%). Apparent and true seroprevalence of MAP, respectively, was 4.34% (95% CI: 3.88%–6.46%) and 9.19% (95% CI: 6.98%–11.98%) in cattle, 6.87% (95% CI: 5.05%–9.27%) and 15.37% (95% CI: 12.60%–16.60%) in sheep and 7.07% (95% CI: 4.82%–10.18%) and 15.86% (95% CI: 12.41%–20.01%) in goats, respectively. As a result, there was no significant relationship between animal species and MAP infection. Moreover, multivariate logistic regression showed that the infection rate is not associated with age, gender and geographical location in cattle, sheep and goats (P > 0.05). Conclusion This study confirms that the seroprevalence of MAP is relatively considerable in the cattle, sheep and goats in the southwest of Iran, although in cattle, it is less than goats and sheep. Therefore, preventive and control measures should be considered by animal health authorities and meat and dairy processing units.
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Affiliation(s)
- Mahdi Pourmahdi Borujeni
- Department of Food Hygiene, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | | | - Masoud Ghorbanpoor
- Department of Pathobiology, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | - Hamzeh Elhaei Sahar
- Department of Food Hygiene, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | - Saeed Bagheri
- Department of Food Hygiene, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | - Sanaz Roveyshedzadeh
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran
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Corneli S, Di Paolo A, Vitale N, Torricelli M, Petrucci L, Sebastiani C, Ciullo M, Curcio L, Biagetti M, Papa P, Costarelli S, Cagiola M, Dondo A, Mazzone P. Early Detection of Mycobacterium avium subsp. paratuberculosis Infected Cattle: Use of Experimental Johnins and Innovative Interferon-Gamma Test Interpretative Criteria. Front Vet Sci 2021; 8:638890. [PMID: 34055946 PMCID: PMC8160102 DOI: 10.3389/fvets.2021.638890] [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: 12/07/2020] [Accepted: 03/30/2021] [Indexed: 11/24/2022] Open
Abstract
Paratuberculosis (PTB), also known as Johne's disease, is a chronic proliferative enteritis of ruminants caused by Mycobacterium avium subsp.paratuberculosis (MAP). To date, PTB diagnosis, based on serology, fecal culture, and real-time polymerase chain reaction, has identified animals in advanced stages of infection. To detect MAP infection in animals earlier, the interferon-gamma (IFN-γ) test may be applied. This assay detects cytokines produced by T-lymphocytes of infected subjects after stimulation with purified protein derivatives (PPDs), extracted from Mycobacterium bovis (MB) and from M. avium (MA). The study involved three bovine herds: one PTB-infected herd, one PTB-free herd, and one with an outbreak of bovine tuberculosis. The IFN-γ test was performed on 235 animals, using bovine PPD (PPDB), avian PPD (PPDA), and three experimental PPD Johnins (PPDJs) extracted from a synthetic liquid medium culture of MAP (PPDJ A, B, and C), to assess early MAP detection and avoid false reactions to MB. Furthermore, IFN-γ results were evaluated using 12 interpretative criteria (ICs), based on the differences and ratio between PPD optical density (OD) and IFN-γ basal OD values after lymphocytic stimulation. IC accuracy was expressed as area under the receiver operating characteristic curve. Through a longitudinal study, PPDJs proved to be specific and sensitive in the detection of MAP-infected animals. Among the evaluated ICs, six showed the best performance in terms of accuracy (p < 0.0001), highlighting PTB subclinical infections. In particular, the two best criteria reached sensitivity values of 100% [confidence interval (CI) 95%, 94.1–100%] with a specificity of 91.8% (CI 95%, 81.9–97.3%) and sensitivity levels of 80.6% (CI 95%, 69.1–89.2%) with a specificity of 100% (CI 95%, 94.1–100%). Thus, the IFN-γ assay proved to be a useful diagnostic tool to identify early subclinical MAP-infected animals, in order to manage infected cattle or those exposed to MAP and to monitor younger calves within a herd. Furthermore, the IFN-γ test can be considered an additional test to avoid the introduction of MAP-infected animals, especially in herds where disease has already been eradicated and preservation of the health status is required to maintain the PTB certification level.
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Affiliation(s)
- Sara Corneli
- Istituto Zooprofilattico Sperimentale dell'Umbria e delle Marche "Togo Rosati", Perugia, Italy
| | - Antonella Di Paolo
- Istituto Zooprofilattico Sperimentale dell'Umbria e delle Marche "Togo Rosati", Perugia, Italy
| | - Nicoletta Vitale
- Istituto Zooprofilattico Sperimentale del Piemonte Liguria e Valle d'Aosta, Torino, Italy
| | - Martina Torricelli
- Istituto Zooprofilattico Sperimentale dell'Umbria e delle Marche "Togo Rosati", Perugia, Italy
| | - Linda Petrucci
- Istituto Zooprofilattico Sperimentale dell'Umbria e delle Marche "Togo Rosati", Perugia, Italy
| | - Carla Sebastiani
- Istituto Zooprofilattico Sperimentale dell'Umbria e delle Marche "Togo Rosati", Perugia, Italy
| | - Marcella Ciullo
- Istituto Zooprofilattico Sperimentale dell'Umbria e delle Marche "Togo Rosati", Perugia, Italy
| | - Ludovica Curcio
- Istituto Zooprofilattico Sperimentale dell'Umbria e delle Marche "Togo Rosati", Perugia, Italy
| | - Massimo Biagetti
- Istituto Zooprofilattico Sperimentale dell'Umbria e delle Marche "Togo Rosati", Perugia, Italy
| | - Paola Papa
- Istituto Zooprofilattico Sperimentale dell'Umbria e delle Marche "Togo Rosati", Perugia, Italy
| | - Silva Costarelli
- Istituto Zooprofilattico Sperimentale dell'Umbria e delle Marche "Togo Rosati", Perugia, Italy
| | - Monica Cagiola
- Istituto Zooprofilattico Sperimentale dell'Umbria e delle Marche "Togo Rosati", Perugia, Italy
| | - Alessandro Dondo
- Istituto Zooprofilattico Sperimentale del Piemonte Liguria e Valle d'Aosta, Torino, Italy
| | - Piera Mazzone
- Istituto Zooprofilattico Sperimentale dell'Umbria e delle Marche "Togo Rosati", Perugia, Italy
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Blanco Vázquez C, Balseiro A, Alonso-Hearn M, Juste RA, Iglesias N, Canive M, Casais R. Bovine Intelectin 2 Expression as a Biomarker of Paratuberculosis Disease Progression. Animals (Basel) 2021; 11:ani11051370. [PMID: 34065919 PMCID: PMC8151335 DOI: 10.3390/ani11051370] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 05/02/2021] [Accepted: 05/06/2021] [Indexed: 01/09/2023] Open
Abstract
Simple Summary The potential of the bovine intelectin 2 as a biomarker of Mycobacterium avium subsp. paratuberculosis infection was investigated using quantitative immunohistochemical analysis of ileocecal valve samples of animals with increasing degrees of lesion severity (focal, multifocal and diffuse histological lesions) and control animals without detected lesions. Significant differences were observed in the mean number of intelectin 2 immunolabelled cells between the three histopathological types and the control. Specifically, the mean number of intelectin 2 labelled cells was indicative of disease progression as the focal group had the highest number of intelectin 2 secreting cells followed by the multifocal, diffuse and control groups indicating that intelectin 2 is a good biomarker for the different stages of Mycobacterium avium subsp. paratuberculosis infection. Quantification of bovine intelectin 2 secreting cells could constitute a good post-mortem tool, complementary to histopathology, to improve detection of Mycobacterium avium subsp. Paratuberculosis infections, especially latent forms of infection. Abstract Paratuberculosis (PTB), a chronic granulomatous enteritis caused by Mycobacterium avium subsp. paratuberculosis (MAP), is responsible for important economic losses in the dairy industry. Our previous RNA-sequencing (RNA-Seq) analysis showed that bovine intelectin 2 (ITLN2) precursor gene was overexpressed in ileocecal valve (ICV) samples of animals with focal (log2 fold-change = 10.6) and diffuse (log2 fold-change = 6.8) PTB-associated lesions compared to animals without lesions. This study analyzes the potential use of ITLN2, a protein that has been described as fundamental in the innate immune response to infections, as a biomarker of MAP infection. The presence of ITLN2 was investigated by quantitative immunohistochemical analysis of ICV samples of 20 Holstein Friesian cows showing focal (n = 5), multifocal (n = 5), diffuse (n = 5) and no histological lesions (n = 5). Significant differences were observed in the mean number of ITLN2 immunostained goblet and Paneth cells between the three histopathological types and the control. The number of immunolabelled cells was higher in the focal histopathological type (116.9 ± 113.9) followed by the multifocal (108.7 ± 140.5), diffuse (76.5 ± 97.8) and control types (41.0 ± 81.3). These results validate ITLN2 as a post-mortem biomarker of disease progression.
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Affiliation(s)
- Cristina Blanco Vázquez
- Center for Animal Biotechnology, Servicio Regional de Investigación y Desarrollo Agroalimentario (SERIDA), 33394 Deva, Spain; (C.B.V.); (N.I.)
| | - Ana Balseiro
- Departamento de Sanidad Animal, Facultad de Veterinaria, Universidad de León, 24071 León, Spain;
- Departamento de Sanidad Animal, Instituto de Ganadería de Montaña (CSIC-Universidad de León), Finca Marzanas, Grulleros, 24346 León, Spain
| | - Marta Alonso-Hearn
- Department of Animal Health, NEIKER-Basque Institute for Agricultural Research and Development, Basque Research and Technology Alliance (BRTA), Parque Científico y Tecnológico de Bizkaia, P812, E-48160 Derio, Spain; (M.A.-H.); (R.A.J.); (M.C.)
| | - Ramón A. Juste
- Department of Animal Health, NEIKER-Basque Institute for Agricultural Research and Development, Basque Research and Technology Alliance (BRTA), Parque Científico y Tecnológico de Bizkaia, P812, E-48160 Derio, Spain; (M.A.-H.); (R.A.J.); (M.C.)
| | - Natalia Iglesias
- Center for Animal Biotechnology, Servicio Regional de Investigación y Desarrollo Agroalimentario (SERIDA), 33394 Deva, Spain; (C.B.V.); (N.I.)
| | - Maria Canive
- Department of Animal Health, NEIKER-Basque Institute for Agricultural Research and Development, Basque Research and Technology Alliance (BRTA), Parque Científico y Tecnológico de Bizkaia, P812, E-48160 Derio, Spain; (M.A.-H.); (R.A.J.); (M.C.)
| | - Rosa Casais
- Center for Animal Biotechnology, Servicio Regional de Investigación y Desarrollo Agroalimentario (SERIDA), 33394 Deva, Spain; (C.B.V.); (N.I.)
- Correspondence:
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50
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Bhat AM, Malik HU, Chaubey KK, Hussain T, Mir AQ, Nabi SU, Gupta S, Singh SV. Bio-typing of Mycobacterium avium subspecies paratuberculosis isolates recovered from the Himalayan sheep and goats. Trop Anim Health Prod 2021; 53:237. [PMID: 33791865 DOI: 10.1007/s11250-021-02682-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Accepted: 03/22/2021] [Indexed: 12/01/2022]
Abstract
Information on bio-type profile of Mycobacterium avium subspecies paratubeculosis (MAP) in sheep flocks and goat herds of Himalayan region is not reported earlier. The aim of our study was to determine the bio-type of MAP infecting livestock of this region. A total of 71 faecal samples (sheep-57, goats-14) were screened by Ziehl-Neelsen (ZN) staining and IS900 PCR, and then processed for culture on Herrold's egg yolk medium (HEYM) having mycobactin J (MJ). Out of 71 faecal samples, MAP colonies were seen only in four samples (sheep-3 and goat-1). Isolates were confirmed as MAP on the basis of slow growth, acid fastness, MJ dependency, IS900 and IS1311 PCR. All the IS900 and IS1311 PCR positive samples were bio-typed by IS1311 PCR-REA (restriction endonuclease analysis), which confirmed all four isolates as 'bison type.' In IS1311 based phylogeny of MAP isolates by ClustalW method of the MegAlign program of DNASTAR Lasergene software, the four sequences of MAP isolates (NCBI sequence nos. MH988763, MH988765, MH988766 and MH988764) did not show any distinct clustering/grouping pattern. However, these four isolates showed a bit of closeness to the MAP sequences (KC990353.1 and KC990352.1) of 'bison type' isolated from wood bison in Canada. In conclusion, this is the first report on isolation and bio-type profile of MAP infecting sheep and goats of Himalayan region. Study will help in devising prevention and control strategies against spread of MAP infection in livestock population of Himalayan region.
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Affiliation(s)
- Adil Majid Bhat
- Division of Clinical Veterinary Medicine, Ethics and Jurisprudence, Faculty of Veterinary Sciences and Animal Husbandry, Shuhama, Srinagar, Jammu and Kashmir, India. .,Department of Veterinary Medicine, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, Punjab, India.
| | - Hamid Ullah Malik
- Division of Clinical Veterinary Medicine, Ethics and Jurisprudence, Faculty of Veterinary Sciences and Animal Husbandry, Shuhama, Srinagar, Jammu and Kashmir, India
| | - Kundan Kumar Chaubey
- Microbiology Lab, Animal Health Division, Central Institute for Research on Goats, Mathura, U.P., India.,Mountain Research Centre for Sheep and Goats, Faculty of Veterinary Sciences and Animal Husbandry, Shuhama, Srinagar, Jammu and Kashmir, India
| | - Tufail Hussain
- Division of Clinical Veterinary Medicine, Ethics and Jurisprudence, Faculty of Veterinary Sciences and Animal Husbandry, Shuhama, Srinagar, Jammu and Kashmir, India
| | - Abdul Qayoom Mir
- Mountain Research Centre for Sheep and Goats, Faculty of Veterinary Sciences and Animal Husbandry, Shuhama, Srinagar, Jammu and Kashmir, India
| | - Showkat Un Nabi
- Division of Clinical Veterinary Medicine, Ethics and Jurisprudence, Faculty of Veterinary Sciences and Animal Husbandry, Shuhama, Srinagar, Jammu and Kashmir, India
| | - Saurabh Gupta
- Microbiology Lab, Animal Health Division, Central Institute for Research on Goats, Mathura, U.P., India.,Department of Biotechnology, GLA University, Mathura, U.P., India
| | - Shoor Vir Singh
- Microbiology Lab, Animal Health Division, Central Institute for Research on Goats, Mathura, U.P., India.,Department of Biotechnology, GLA University, Mathura, U.P., India
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