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Sánchez-Carvajal JM, Vera-Salmoral E, Huerta B, Galán-Relaño Á, Ruedas-Torres I, Larenas-Muñoz F, Luque I, Carrasco L, Gómez-Laguna J. Droplet digital PCR as alternative to microbiological culture for Mycobacterium tuberculosis complex detection in bovine lymph node tissue samples. Front Cell Infect Microbiol 2024; 14:1349999. [PMID: 38469351 PMCID: PMC10925636 DOI: 10.3389/fcimb.2024.1349999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Accepted: 02/07/2024] [Indexed: 03/13/2024] Open
Abstract
Introduction Bovine tuberculosis (bTB) caused by Mycobacterium tuberculosis complex (MTC) remains a significant concern for public health. Direct real-time PCR and droplet digital PCR (ddPCR) are proposed as alternative tools to enhance diagnostic precision and efficiency. This study aims to assess the diagnostic performance of a ddPCR assay targeting IS6110 for the detection of MTC DNA in both microbiological culture and fresh lymph node (LN) tissue samples obtained from cattle, in comparison with the established reference standard, the microbiological culture followed by real-time PCR. Methods The fresh LNs (N=100) were collected each from a different cattle carcass at the slaughterhouse. The limit of detection of ddPCR-IS6110 was set to 101 copies per 20 μl reaction. Results DdPCR-IS6110 detected 44 out of 49 reference-standard positive samples and yielded negative results in 47 out of 51 reference-standard negative samples, resulting in adjusted sensitivity (Se) and specificity (Sp) of 90.76% [95% confidence interval (CI): 82.58 - 98.96%)], and 100% (95% CI: 100%) respectively. The estimated adjusted false negative rate (FNR) was 9.23% (95% CI: 1.04 - 17.42%) and the false positive rate (FPR) was 0% (95% CI: 0%). When directly applied from fresh bovine LN tissues, ddPCR-IS6110 identified 47 out of 49 reference-standard positive samples as ddPCR-IS6110-positive and 42 out of 51 reference-standard negative samples as ddPCR-IS6110-negative, resulting in adjusted Se and Sp values of 94.80% [95% (CI): 88.52 - 100%] and 100% (95% CI: 100%), respectively. The adjusted FNR was 5.20% (95% CI: 0 - 11.50%) and the FPR was 0% (95% CI: 0%). Noteworthy, ddPCR-IS6110 disclosed as positive 9 samples negative to reference-standard. Discussion DdPCR-IS6110 proved to be a rapid, highly sensitive, and specific diagnostic tool as an alternative to reference-standard method.
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Affiliation(s)
- José María Sánchez-Carvajal
- Department of Anatomy and Comparative Pathology and Toxicology, Pathology and Immunology Group (UCO-PIG), Unidad de Investigación Competitiva (UIC) Zoonosis y Enfermedades Emergentes ENZOEM, University of Córdoba, Córdoba, Spain
| | - Eduardo Vera-Salmoral
- Department of Anatomy and Comparative Pathology and Toxicology, Pathology and Immunology Group (UCO-PIG), Unidad de Investigación Competitiva (UIC) Zoonosis y Enfermedades Emergentes ENZOEM, University of Córdoba, Córdoba, Spain
- Department of Animal Health, Unidad de Investigación Competitiva (UIC) Zoonosis y Enfermedades Emergentes (ENZOEM), University of Córdoba, University of Córdoba, Córdoba, Spain
| | - Belén Huerta
- Department of Animal Health, Unidad de Investigación Competitiva (UIC) Zoonosis y Enfermedades Emergentes (ENZOEM), University of Córdoba, University of Córdoba, Córdoba, Spain
| | - Ángela Galán-Relaño
- Department of Animal Health, Unidad de Investigación Competitiva (UIC) Zoonosis y Enfermedades Emergentes (ENZOEM), University of Córdoba, University of Córdoba, Córdoba, Spain
| | - Inés Ruedas-Torres
- Department of Anatomy and Comparative Pathology and Toxicology, Pathology and Immunology Group (UCO-PIG), Unidad de Investigación Competitiva (UIC) Zoonosis y Enfermedades Emergentes ENZOEM, University of Córdoba, Córdoba, Spain
- UK Health Security Agency (UKHSA), Salisbury, United Kingdom
| | - Fernanda Larenas-Muñoz
- Department of Anatomy and Comparative Pathology and Toxicology, Pathology and Immunology Group (UCO-PIG), Unidad de Investigación Competitiva (UIC) Zoonosis y Enfermedades Emergentes ENZOEM, University of Córdoba, Córdoba, Spain
| | - Inmaculada Luque
- Department of Animal Health, Unidad de Investigación Competitiva (UIC) Zoonosis y Enfermedades Emergentes (ENZOEM), University of Córdoba, University of Córdoba, Córdoba, Spain
| | - Librado Carrasco
- Department of Anatomy and Comparative Pathology and Toxicology, Pathology and Immunology Group (UCO-PIG), Unidad de Investigación Competitiva (UIC) Zoonosis y Enfermedades Emergentes ENZOEM, University of Córdoba, Córdoba, Spain
| | - Jaime Gómez-Laguna
- Department of Anatomy and Comparative Pathology and Toxicology, Pathology and Immunology Group (UCO-PIG), Unidad de Investigación Competitiva (UIC) Zoonosis y Enfermedades Emergentes ENZOEM, University of Córdoba, Córdoba, Spain
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Cooke DM, Clarke C, Kerr TJ, Warren RM, Witte C, Miller MA, Goosen WJ. Detection of Mycobacterium bovis in nasal swabs from communal goats ( Capra hircus) in rural KwaZulu-Natal, South Africa. Front Microbiol 2024; 15:1349163. [PMID: 38419629 PMCID: PMC10899470 DOI: 10.3389/fmicb.2024.1349163] [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: 12/04/2023] [Accepted: 02/01/2024] [Indexed: 03/02/2024] Open
Abstract
Animal tuberculosis, caused by Mycobacterium bovis, presents a significant threat to both livestock industries and public health. Mycobacterium bovis tests rely on detecting antigen specific immune responses, which can be influenced by exposure to non-tuberculous mycobacteria, test technique, and duration and severity of infection. Despite advancements in direct M. bovis detection, mycobacterial culture remains the primary diagnostic standard. Recent efforts have explored culture-independent PCR-based methods for identifying mycobacterial DNA in respiratory samples. This study aimed to detect M. bovis in nasal swabs from goats (Capra hircus) cohabiting with M. bovis-infected cattle in KwaZulu-Natal, South Africa. Nasal swabs were collected from 137 communal goats exposed to M. bovis-positive cattle and 20 goats from a commercial dairy herd without M. bovis history. Swabs were divided into three aliquots for analysis. The first underwent GeneXpert® MTB/RIF Ultra assay (Ultra) screening. DNA from the second underwent mycobacterial genus-specific PCR and Sanger sequencing, while the third underwent mycobacterial culture followed by PCR and sequencing. Deep sequencing identified M. bovis DNA in selected Ultra-positive swabs, confirmed by region-of-difference (RD) PCR. Despite no other evidence of M. bovis infection, viable M. bovis was cultured from three communal goat swabs, confirmed by PCR and sequencing. Deep sequencing of DNA directly from swabs identified M. bovis in the same culture-positive swabs and eight additional communal goats. No M. bovis was found in commercial dairy goats, but various NTM species were detected. This highlights the risk of M. bovis exposure or infection in goats sharing pastures with infected cattle. Rapid Ultra screening shows promise for selecting goats for further M. bovis testing. These techniques may enhance M. bovis detection in paucibacillary samples and serve as valuable research tools.
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Affiliation(s)
- Deborah M. Cooke
- Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Sciences, DSI-NRF Centre of Excellence for Biomedical Tuberculosis Research, South African Medical Research Council Centre for Tuberculosis Research, Stellenbosch University, Stellenbosch, South Africa
| | - Charlene Clarke
- Faculty of Natural and Agricultural Sciences, Department of Zoology and Entomology, University of Pretoria, Pretoria, South Africa
| | - Tanya J. Kerr
- Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Sciences, DSI-NRF Centre of Excellence for Biomedical Tuberculosis Research, South African Medical Research Council Centre for Tuberculosis Research, Stellenbosch University, Stellenbosch, South Africa
| | - Robin M. Warren
- Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Sciences, DSI-NRF Centre of Excellence for Biomedical Tuberculosis Research, South African Medical Research Council Centre for Tuberculosis Research, Stellenbosch University, Stellenbosch, South Africa
| | - Carmel Witte
- Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Sciences, DSI-NRF Centre of Excellence for Biomedical Tuberculosis Research, South African Medical Research Council Centre for Tuberculosis Research, Stellenbosch University, Stellenbosch, South Africa
- The Center for Wildlife Studies, South Freeport, ME, United States
| | - Michele A. Miller
- Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Sciences, DSI-NRF Centre of Excellence for Biomedical Tuberculosis Research, South African Medical Research Council Centre for Tuberculosis Research, Stellenbosch University, Stellenbosch, South Africa
| | - Wynand J. Goosen
- Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Sciences, DSI-NRF Centre of Excellence for Biomedical Tuberculosis Research, South African Medical Research Council Centre for Tuberculosis Research, Stellenbosch University, Stellenbosch, South Africa
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Sawyer J, Rhodes S, Jones GJ, Hogarth PJ, Vordermeier HM. Mycobacterium bovis and its impact on human and animal tuberculosis. J Med Microbiol 2023; 72. [PMID: 37962183 DOI: 10.1099/jmm.0.001769] [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] [Indexed: 11/15/2023] Open
Abstract
Graphical abstract
Mycobacterium bovis
is a slow-growing (16–20 h generation time), Gram-positive and acid-fast bacterium member of the
Mycobacterium tuberculosis
complex pathogen group (MTBC). They are characterized by a complex, protective cell wall containing mycolic acids. The MTBCs are the causative agents of tuberculosis (TB). Following initial infection, subsequent pathological changes, and the progress of infection depend on the interplay between host defence mechanisms and mycobacterial virulence factors and the balance between the immunologic protective responses and the damaging inflammatory processes. Progression of the disease is characterized by the formation of typical caseous tuberculous granuloma (inflammatory mononuclear cell aggregates) because of the host's immune response to infection. The transmission and epidemiology of
Mycobacterium bovis
are complex and vary depending on the situation and ecosystem. In the UK, the spread of BTB in the UK cattle herd can occur by transmitting the disease from cattle to cattle and between badgers but also between badgers and cattle. The disease is thought to be primarily a respiratory disease with spread between individuals through mechanisms such as coughing or transfer of bacteria in respiratory secretions. It is also thought that environmental contamination may also lead to some transmission. The protective cell wall of the organism is believed to allow the organism to survive outside an animal host, which can then transfer to new hosts following subsequent environmental exposure. In some situations, ingestion of pathogens in food can lead to infection. The relative contribution of these routes and precise transmission mechanisms needs to be better understood.
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Affiliation(s)
- Jason Sawyer
- Animal and Plant Health Agency and WOAH Reference Laboratory for Mammalian TB, Addlestone, Surrey, UK
| | - Shelley Rhodes
- Animal and Plant Health Agency and WOAH Reference Laboratory for Mammalian TB, Addlestone, Surrey, UK
| | - Gareth J Jones
- Animal and Plant Health Agency and WOAH Reference Laboratory for Mammalian TB, Addlestone, Surrey, UK
| | - Philip J Hogarth
- Animal and Plant Health Agency and WOAH Reference Laboratory for Mammalian TB, Addlestone, Surrey, UK
| | - H Martin Vordermeier
- Animal and Plant Health Agency and WOAH Reference Laboratory for Mammalian TB, Addlestone, Surrey, UK
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Vera-Salmoral E, Gómez-Laguna J, Galán-Relaño Á, Ruedas-Torres I, Carrasco L, Luque I, Huerta B, Sánchez-Carvajal JM. Optimization of real-time PCR protocols from lymph node bovine tissue for direct detection of Mycobacterium tuberculosis complex. Microbiol Spectr 2023; 11:e0034823. [PMID: 37707455 PMCID: PMC10581224 DOI: 10.1128/spectrum.00348-23] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2023] [Accepted: 07/22/2023] [Indexed: 09/15/2023] Open
Abstract
Bovine tuberculosis (bTB) is a zoonotic disease and a global health problem that is subjected to obligatory eradication programs in the European Union. Microbiological culture is an imperfect technique for bTB diagnosis. This study aims to compare and validate two DNA isolation protocols and three different specific DNA targets, IS6110, IS4, and mpb70, to confirm Mycobacterium tuberculosis complex (MTC) infection by real-time PCR directly from fresh tissue samples. Fresh lymph node samples were collected from 81 cattle carcasses at the slaughterhouse. A comparison of both extraction protocols was performed with IS6110-real-time PCR, showing an adjusted sensitivity (SE) of 78.34% and 95.9% for protocols 1 and 2, respectively, while the specificity (SP) was 100% in both cases. Afterward, the comparison between IS4 and mpb70 targets was performed from the samples extracted with protocol 2, obtaining an adjusted SE of 90.87% and 83.3%, respectively, and an SP of 100% in both cases. The positive likelihood ratio was ∞ for the three targets, and the negative likelihood ratio was 0.04, 0.091, and 0.16 for IS6110, IS4, and mpb70, respectively. Negative predictive values were ≥90%, ≥85%, and ≥80% for real-time PCR targeting IS6110, IS4, and mpb70, respectively, when the true prevalence is ≤60%, and the positive predictive value is 100% in any scenario of true prevalence. According to these results, the DNA extraction protocol 2 and real-time PCR targeting IS6110 or IS4 could be potential first-choice molecular assays to detect MTC directly in fresh bovine tissue samples. IMPORTANCE Bovine tuberculosis (bTB), a chronic infectious and zoonotic disease caused by Mycobacterium tuberculosis complex (MTC), is considered a neglected disease of global importance, causing a detrimental impact on public health, particularly in developing countries where tuberculosis remains a major health problem. However, debate around the efficacy of control measures is still an ongoing matter of concern, with poor diagnostic performance being considered one of the most relevant factors involved in the failure to eradicate the disease since many truly infected animals will be misclassified as bTB-free. This study highlights a DNA extraction protocol and real-time PCR targeting IS6110 or IS4 as potential first-choice molecular assays to detect MTC directly in fresh bovine tissue samples, providing rapid, highly sensitive, and specific diagnostic tools as an alternative to microbiology, which could take up to 3 months to complete, shortening the turnaround time for decision makers to be promptly informed.
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Affiliation(s)
- Eduardo Vera-Salmoral
- Department of Anatomy and Comparative Pathology and Toxicology, Pathology and Immunology Group (UCO-PIG), UIC Zoonosis y Enfermedades Emergentes ENZOEM, University of Córdoba, International Excellence Agrifood Campus ‘CeiA3’, Córdoba, Spain
- Department of Animal Health, UIC Zoonosis y Enfermedades Emergentes ENZOEM, International Excellence Agrifood Campus ‘CeiA3’, University of Córdoba, Córdoba, Spain
| | - Jaime Gómez-Laguna
- Department of Anatomy and Comparative Pathology and Toxicology, Pathology and Immunology Group (UCO-PIG), UIC Zoonosis y Enfermedades Emergentes ENZOEM, University of Córdoba, International Excellence Agrifood Campus ‘CeiA3’, Córdoba, Spain
| | - Ángela Galán-Relaño
- Department of Animal Health, UIC Zoonosis y Enfermedades Emergentes ENZOEM, International Excellence Agrifood Campus ‘CeiA3’, University of Córdoba, Córdoba, Spain
| | - Inés Ruedas-Torres
- Department of Anatomy and Comparative Pathology and Toxicology, Pathology and Immunology Group (UCO-PIG), UIC Zoonosis y Enfermedades Emergentes ENZOEM, University of Córdoba, International Excellence Agrifood Campus ‘CeiA3’, Córdoba, Spain
| | - Librado Carrasco
- Department of Anatomy and Comparative Pathology and Toxicology, Pathology and Immunology Group (UCO-PIG), UIC Zoonosis y Enfermedades Emergentes ENZOEM, University of Córdoba, International Excellence Agrifood Campus ‘CeiA3’, Córdoba, Spain
| | - Inmaculada Luque
- Department of Animal Health, UIC Zoonosis y Enfermedades Emergentes ENZOEM, International Excellence Agrifood Campus ‘CeiA3’, University of Córdoba, Córdoba, Spain
| | - Belén Huerta
- Department of Animal Health, UIC Zoonosis y Enfermedades Emergentes ENZOEM, International Excellence Agrifood Campus ‘CeiA3’, University of Córdoba, Córdoba, Spain
| | - José María Sánchez-Carvajal
- Department of Anatomy and Comparative Pathology and Toxicology, Pathology and Immunology Group (UCO-PIG), UIC Zoonosis y Enfermedades Emergentes ENZOEM, University of Córdoba, International Excellence Agrifood Campus ‘CeiA3’, Córdoba, Spain
- Institute of Virology and Immunology IVI, Sensemattstrasse, Mittelhäusern, Switzerland
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Accuracy of Tests for Diagnosis of Animal Tuberculosis: Moving Away from the Golden Calf (and towards Bayesian Models). Transbound Emerg Dis 2023. [DOI: 10.1155/2023/7615716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
The last decades have seen major efforts to develop new and improved tools to maximize our ability to detect tuberculosis-infected animals and advance towards the objective of disease control and ultimately eradication. Nevertheless, there is still uncertainty regarding test performance due to the wide range of specificity and especially sensitivity estimates published in the scientific literature. Here, we performed a systematic review of the literature on studies that evaluated the performance of tuberculosis diagnostic tests used in animals through Bayesian Latent Class Models (BLCMs), which do not require the application of a (fallible) reference procedure to classify animals as infected with tuberculosis or not. BLCM-based sensitivity and specificity estimates deviated from those obtained using a reference procedure for certain antemortem tests: an overall lower sensitivity of skin tests and serology and a higher sensitivity of interferon-gamma (IFN-γ) assays was reported. In the case of postmortem diagnostic tests, sensitivity estimates from BLCMs were similar to estimates from studies based on other methodologies. For specificity, the range of BLCM-based estimates was narrower than those based on a reference test, reaching values close to 100% (but lower in the case of IFN-γ assays). In conclusion, Bayesian methods have been increasingly applied for the evaluation of tuberculosis diagnostic tests in animals, yielding results that differ (sometimes substantially) from previously reported test performance in the literature, particularly for in vivo tests and sensitivity estimates. Newly developed models that allow adjustment for relevant factors (e.g., age, breed, region, and herd size) can contribute to the generation of more unbiased estimates of test performance. Nevertheless, although BLCMs for tuberculosis do not require the use of an imperfect reference procedure and are therefore not influenced by its limited performance, they require careful implementation, and transparent systematic reporting should be the norm.
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Diagnostic accuracy of the Enferplex Bovine Tuberculosis antibody test in cattle sera. Sci Rep 2023; 13:1875. [PMID: 36726018 PMCID: PMC9892036 DOI: 10.1038/s41598-023-28410-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Accepted: 01/18/2023] [Indexed: 02/03/2023] Open
Abstract
Bovine tuberculosis is a contagious bacterial disease of worldwide economic, zoonotic and welfare importance caused mainly by Mycobacterium bovis infection. Current regulatory diagnostic methods lack sensitivity and require improvement. We have developed a multiplex serological test for bovine tuberculosis and here we provide an estimate of the diagnostic accuracy of the test in cattle. Positive and negative reference serum samples were obtained from animals from Europe and the United States of America. The diagnostic specificity estimate was 98.4% and 99.7% using high sensitivity and high specificity settings of the test respectively. Tuberculin boosting did not affect the overall specificity estimate. The diagnostic sensitivity in samples from Mycobacterium bovis culture positive animals following tuberculin boosting was 93.9%.The relative sensitivity following boosting in tuberculin test positive, lesion positive animals and interferon gamma test positive, lesion positive animals was 97.2% and 96.9% respectively. In tuberculin test negative, lesion positive animals and in interferon gamma test negative, lesion positive animals, the relative sensitivity following tuberculin boosting was 88.2% and 83.6% respectively. The results show that the test has high diagnostic sensitivity and specificity and can detect infected animals that are missed by tuberculin and interferon gamma testing.
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Asadian M, Hassanzadeh SM, Safarchi A, Douraghi M. The effect of in vitro consecutive passages and culture medium on the genetic variations in BCG Pasteur 1173P2 vaccine. PLoS One 2023; 18:e0280294. [PMID: 36689397 PMCID: PMC9870133 DOI: 10.1371/journal.pone.0280294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Accepted: 12/24/2022] [Indexed: 01/24/2023] Open
Abstract
Since the introduction of the Bacillus Calmette-Guérin (BCG) vaccine, the genomes of vaccine strains have undergone variations due to repeated passages in different laboratories and vaccine production facilities. Genetic variations have been considered as one of the effective factors in the BCG variable protective efficacy. Consecutive subcultures have been shown to play an essential role in causing genetic variations in several microorganisms, including Mycobacterium bovis BCG. Therefore, the world health organization (WHO) recommendation to limit the passages of master seed lot in the BCG vaccine production should be considered. Besides, the role of other external variables such as quality of the raw ingredients of the culture media, the type of the culture medium and the cultivation methods in the vaccine production has been poorly studied. Here, the effect of passages and culture medium on genetic variations in a BCG seed lot was investigated during a year. The findings of this study revealed a total of 19 variants compared to seed lot while the passages were more than the number recommended by WHO. The first culture of seed lot in the Sauton broth and Middlebrook 7H9 media, and the last subculture in Sauton broth had the least and the most variants, respectively. The observation of the higher number of variants in the last cultures on Sauton broth and Middlebrook 7H9 in comparison to the first and the middle cultures may indicate the effect of passages on the genetic variations in BCG. Additionally, more variants in BCG grown in the Sauton broth do not necessarily represent the greater ability of this medium to cause genetic mutations. For a better conclusion, it is required to examine the medium components as independent variables.
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Affiliation(s)
- Mahla Asadian
- Division of Microbiology, Department of Pathobiology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Azadeh Safarchi
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, Australia
| | - Masoumeh Douraghi
- Division of Microbiology, Department of Pathobiology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
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Kelly DJ, Marples NM, Byrne RL, Fogarty U, Kenny K, Cameron H, Griffin D, Holland CV. An investigation of Mycobacterium bovis and helminth coinfection in the European badger Meles meles. INTERNATIONAL JOURNAL FOR PARASITOLOGY: PARASITES AND WILDLIFE 2022; 19:311-316. [DOI: 10.1016/j.ijppaw.2022.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 11/07/2022] [Accepted: 11/07/2022] [Indexed: 11/11/2022]
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Borham M, Oreiby A, El-Gedawy A, Hegazy Y, Khalifa HO, Al-Gaabary M, Matsumoto T. Review on Bovine Tuberculosis: An Emerging Disease Associated with Multidrug-Resistant Mycobacterium Species. Pathogens 2022; 11:pathogens11070715. [PMID: 35889961 PMCID: PMC9320398 DOI: 10.3390/pathogens11070715] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Revised: 06/16/2022] [Accepted: 06/18/2022] [Indexed: 12/26/2022] Open
Abstract
Bovine tuberculosis is a serious infectious disease affecting a wide range of domesticated and wild animals, representing a worldwide economic and public health burden. The disease is caused by Mycobacteriumbovis and infrequently by other pathogenic mycobacteria. The problem of bovine tuberculosis is complicated when the infection is associated with multidrug and extensively drug resistant M. bovis. Many techniques are used for early diagnosis of bovine tuberculosis, either being antemortem or postmortem, each with its diagnostic merits as well as limitations. Antemortem techniques depend either on cellular or on humoral immune responses, while postmortem diagnosis depends on adequate visual inspection, palpation, and subsequent diagnostic procedures such as bacterial isolation, characteristic histopathology, and PCR to reach the final diagnosis. Recently, sequencing and bioinformatics tools have gained increasing importance for the diagnosis of bovine tuberculosis, including, but not limited to typing, detection of mutations, phylogenetic analysis, molecular epidemiology, and interactions occurring within the causative mycobacteria. Consequently, the current review includes consideration of bovine tuberculosis as a disease, conventional and recent diagnostic methods, and the emergence of MDR-Mycobacterium species.
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Affiliation(s)
- Mohamed Borham
- Bacteriology Department, Animal Health Research Institute Matrouh Lab, Matrouh 51511, Egypt;
| | - Atef Oreiby
- Department of Animal Medicine (Infectious Diseases), Faculty of Veterinary Medicine, Kafrelsheikh University, Kafr El-Sheik 33516, Egypt; (A.O.); (Y.H.); (M.A.-G.)
| | - Attia El-Gedawy
- Bacteriology Department, Animal Health Research Institute, Giza 12618, Egypt;
| | - Yamen Hegazy
- Department of Animal Medicine (Infectious Diseases), Faculty of Veterinary Medicine, Kafrelsheikh University, Kafr El-Sheik 33516, Egypt; (A.O.); (Y.H.); (M.A.-G.)
| | - Hazim O. Khalifa
- Department of Infectious Diseases, Graduate School of Medicine, International University of Health and Welfare, Narita 286-0048, Japan
- Department of Pharmacology, Faculty of Veterinary Medicine, Kafrelsheikh University, Kafr El-Sheikh 33516, Egypt
- Antimicrobial Resistance Research Center, National Institute of Infectious Diseases, Higashimurayama, Tokyo 189-0002, Japan
- Correspondence: (H.O.K.); (T.M.)
| | - Magdy Al-Gaabary
- Department of Animal Medicine (Infectious Diseases), Faculty of Veterinary Medicine, Kafrelsheikh University, Kafr El-Sheik 33516, Egypt; (A.O.); (Y.H.); (M.A.-G.)
| | - Tetsuya Matsumoto
- Department of Infectious Diseases, Graduate School of Medicine, International University of Health and Welfare, Narita 286-0048, Japan
- Correspondence: (H.O.K.); (T.M.)
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Larenas-Muñoz F, Sánchez-Carvajal JM, Galán-Relaño Á, Ruedas-Torres I, Vera-Salmoral E, Gómez-Gascón L, Maldonado A, Carrasco L, Tarradas C, Luque I, Rodríguez-Gómez IM, Gómez-Laguna J. The Role of Histopathology as a Complementary Diagnostic Tool in the Monitoring of Bovine Tuberculosis. Front Vet Sci 2022; 9:816190. [PMID: 35647097 PMCID: PMC9136683 DOI: 10.3389/fvets.2022.816190] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Accepted: 03/24/2022] [Indexed: 12/01/2022] Open
Abstract
The diagnosis of bovine tuberculosis (bTB) is based on the single intradermal tuberculin test (SIT), interferon gamma, and compulsory slaughter of reactor animals. Culture and PCR from fresh tissue are regarded as gold standard techniques for post-mortem confirmation, with the former being time-consuming and presenting moderate to low sensitivity and the latter presenting promising results. Histopathology has the advantage to identify and categorize lesions in both reactor and non-reactor animals. Therefore, this study aims to highlight the role of histopathology in the systematic diagnosis of bTB to shorten the time to disclose positive animals. Blood (212) and lymph node (681) samples were collected for serological, bacteriological, and histopathological analyses from a total of 230 cattle subjected to the Spanish bTB eradication program. Seventy-one lymph nodes and 59 cattle yielded a positive result to bacteriology, with 59 lymph nodes and 48 cattle presenting a positive result in real-time PCR from fresh tissue. Roughly 19% (40/212) of sera samples gave a positive result to ELISA. Tuberculosis-like lesions (TBLs) were observed in 11.9% (81/681) of the lymph nodes and 30.9% (71/230) of cattle. Noteworthy, TBLs were evidenced in 18 out of 83 SIT− and real-time PCR and bacteriology negative animals, with 11/18 disclosing a positive result to Ziehl-Neelsen technique and two of them to ddPCR from paraffin blocks targeting IS6110. Six out of these 11 ZN+ corresponded with mesenteric LN and were confirmed positive to paratuberculosis. Histopathology yielded a sensitivity of 91.3% (CI95 83.2–99.4%) and a specificity of 84.4% (CI95 78.6–89.3%) with good agreement (κ = 0.626) when compared with real-time PCR. Our results confirm that histopathology allows a rapid confirmation of real-time PCR and bacteriology, emphasizing its contribution to bTB control and monitoring.
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Affiliation(s)
- Fernanda Larenas-Muñoz
- Department of Anatomy and Comparative Pathology and Toxicology, University of Córdoba, International Excellence Agrifood Campus ‘CeiA3’, Córdoba, Spain
- *Correspondence: Fernanda Larenas-Muñoz
| | - José M. Sánchez-Carvajal
- Department of Anatomy and Comparative Pathology and Toxicology, University of Córdoba, International Excellence Agrifood Campus ‘CeiA3’, Córdoba, Spain
| | - Ángela Galán-Relaño
- Department of Animal Health, University of Córdoba, International Excellence Agrifood Campus ‘CeiA3’, Córdoba, Spain
| | - Inés Ruedas-Torres
- Department of Anatomy and Comparative Pathology and Toxicology, University of Córdoba, International Excellence Agrifood Campus ‘CeiA3’, Córdoba, Spain
| | - Eduardo Vera-Salmoral
- Department of Anatomy and Comparative Pathology and Toxicology, University of Córdoba, International Excellence Agrifood Campus ‘CeiA3’, Córdoba, Spain
- Department of Animal Health, University of Córdoba, International Excellence Agrifood Campus ‘CeiA3’, Córdoba, Spain
| | - Lidia Gómez-Gascón
- Department of Animal Health, University of Córdoba, International Excellence Agrifood Campus ‘CeiA3’, Córdoba, Spain
| | - Alfonso Maldonado
- Department of Animal Health, University of Córdoba, International Excellence Agrifood Campus ‘CeiA3’, Córdoba, Spain
| | - Librado Carrasco
- Department of Anatomy and Comparative Pathology and Toxicology, University of Córdoba, International Excellence Agrifood Campus ‘CeiA3’, Córdoba, Spain
| | - Carmen Tarradas
- Department of Animal Health, University of Córdoba, International Excellence Agrifood Campus ‘CeiA3’, Córdoba, Spain
| | - Inmaculada Luque
- Department of Animal Health, University of Córdoba, International Excellence Agrifood Campus ‘CeiA3’, Córdoba, Spain
| | - Irene M. Rodríguez-Gómez
- Department of Anatomy and Comparative Pathology and Toxicology, University of Córdoba, International Excellence Agrifood Campus ‘CeiA3’, Córdoba, Spain
| | - Jaime Gómez-Laguna
- Department of Anatomy and Comparative Pathology and Toxicology, University of Córdoba, International Excellence Agrifood Campus ‘CeiA3’, Córdoba, Spain
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11
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Lekko YM, Che-Amat A, Ooi PT, Omar S, Ramanoon SZ, Mazlan M, Jesse FFA, Jasni S, Ariff Abdul-Razak MF. Mycobacterium Tuberculosis and Avium Complex Investigation among Malaysian Free-Ranging Wild Boar and Wild Macaques at Wildlife-Livestock-Human Interface. Animals (Basel) 2021; 11:3252. [PMID: 34827984 PMCID: PMC8614387 DOI: 10.3390/ani11113252] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Revised: 09/27/2021] [Accepted: 09/28/2021] [Indexed: 01/23/2023] Open
Abstract
Wild animals are considered reservoirs, contributing to the transmission of emerging zoonotic diseases such as tuberculosis (TB). A cross-sectional study was conducted by opportunistic sampling from fresh carcasses of free-ranging wild boar (n = 30), and free-ranging wild macaques (n = 42). Stained smears from these tissues were tested for acid-fast bacilli (AFB) with Ziehl-Neelsen staining. Mycobacterial culture was conducted using Lowenstein-Jensen media and Middlebrook 7H11 agar media. Polymerase chain reaction (PCR) was performed through the detection of the 16S rRNA gene, with multiple sets of primers for the detection of Mycobacterium tuberculosis complex (MTBC) and Mycobacterium avium complex (MAC). In wild boars, 30% (9/30; 95% Confidence Interval: 16.7-47.9%) of examined samples showed gross tuberculosis-like lesions (TBLLs). Multiple nodular lesions that were necrotic/miliary with cavitation were found in the submandibular lymph nodes, tonsils, lungs, kidney and liver, while single nodular lesions were found in the mediastinal lymph nodes, spleen and mesenteric lymph nodes. Conventional PCR on the submandibular lymphoid tissues of wild boar (nine samples with TBLLs and three non-TBLL samples) showed that 75% (9/12) were positive for Mycobacterium bovis (95% CI: 46.8-91.1), and 91% (CI: 64.6-98.5) were positive for Mycobacterium avium. For macaques, 33.3% (10/30) were positive for M. avium (95% CI: 19.2-51.2) but negative for MTBC.
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Affiliation(s)
- Yusuf Madaki Lekko
- Department of Veterinary Clinical Studies, Faculty of Veterinary Medicine, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia; (Y.M.L.); (P.T.O.); (F.F.A.J.)
- Department of Veterinary Medicine, Faculty of Veterinary Medicine, Universiti of Maidugu-ri, Maiduguri PMB 1069, Borno State, Nigeria
| | - Azlan Che-Amat
- Department of Veterinary Clinical Studies, Faculty of Veterinary Medicine, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia; (Y.M.L.); (P.T.O.); (F.F.A.J.)
| | - Peck Toung Ooi
- Department of Veterinary Clinical Studies, Faculty of Veterinary Medicine, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia; (Y.M.L.); (P.T.O.); (F.F.A.J.)
| | - Sharina Omar
- Department of Veterinary Pathology & Microbiology, Faculty of Veterinary Medicine, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia; (S.O.); (M.M.)
| | - Siti Zubaidah Ramanoon
- Farm and Exotic Animal Medicine and Surgery, Faculty of Veterinary Medicine, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia;
| | - Mazlina Mazlan
- Department of Veterinary Pathology & Microbiology, Faculty of Veterinary Medicine, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia; (S.O.); (M.M.)
| | - Faez Firdaus Abdullah Jesse
- Department of Veterinary Clinical Studies, Faculty of Veterinary Medicine, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia; (Y.M.L.); (P.T.O.); (F.F.A.J.)
| | - Sabri Jasni
- Department of Paraclinical, Faculty of Veterinary Medicine, Universiti Malaysia Kelantan, Kota Bharu 16100, Kelantan, Malaysia;
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12
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Ejo M, Haile B, Tariku T, Nigatu S, Kebede E, Bitew AB, Demessie Y, Getaneh G, Alebie A, Girma M, Ota F, Nuru A. Bacteriological and molecular characterization of Mycobacterium bovis isolates from tuberculous lesions collected among slaughtered cattle, Northwest Ethiopia. BMC Microbiol 2021; 21:286. [PMID: 34666679 PMCID: PMC8527785 DOI: 10.1186/s12866-021-02349-1] [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: 07/05/2021] [Accepted: 10/01/2021] [Indexed: 12/02/2022] Open
Abstract
Background In Ethiopia, the distribution of bovine tuberculosis (BTB) has long been known and documented as a major problem of animal health. However, the burden of circulating M. bovis strains is poorly understood in the country. Therefore; this study aimed to identify and characterize the mycobacterial isolates responsible for BTB in Northwest Ethiopia. Methods A cross-sectional study was conducted on tuberculous lesions that had been collected from slaughtered cattle between September 2018 to June 2019. Collected lesions were cultured and tested for tuberculous bacilli. The MPT64 assay and Genotype line probe assay (LPA) were used for identification of mycobacterial isolates, and region of deletion 4 (RD4) typing and spoligotyping were used to characterize the M. bovis strains. Results Of the total 1458 examined slaughtered cattle, only 62 (4.3, 95%CI; 0.0328–0.0542) had tuberculous lesions. The highest number of gross tuberculous lesions were observed from the lymph nodes of the thoracic cavity; at the mediastinal (40.3%, 25/62) and bronchial (22.6%, 14/62) lymph nodes. Of the 62 collected tuberculous lesions; 18 (29.0%) were culture positive for mycobacterium isolates, and only five isolates were confirmed for M. tuberculosis complex (MTBc) by the MPT64 assay and LPA. All the five MTBc isolates were positive for RD4 typing of M. bovis with a PCR product size of 446 bp, and no isolate was noticed to have M. tuberculosis. The detected M. bovis strains displayed five spoligotypes; with the common SB1176 and SB0133 M. bovis strains, although the two spoligotypes had not been previously reported. Conclusion The present study shows that BTB in North Gondar, Ethiopia, is caused by M. bovis strains SB1176 and SB0033, with low frequency. Thus, the finding highlights the importance of continuous surveillance for mycobacterial strains in cattle populations. Supplementary Information The online version contains supplementary material available at 10.1186/s12866-021-02349-1.
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Affiliation(s)
- Mebrat Ejo
- Department of Biomedical Sciences, College of Veterinary Medicine and Animal Sciences, University of Gondar, P.O. Box 196, Gondar, Ethiopia.
| | - Belete Haile
- Department of Veterinary Epidemiology and Public Health, College of Veterinary Medicine and Animal Sciences, University of Gondar, P.O. Box 196, Gondar, Ethiopia
| | - Tsegaye Tariku
- Department of Biomedical Sciences, College of Veterinary Medicine and Animal Sciences, University of Gondar, P.O. Box 196, Gondar, Ethiopia.,School of Veterinary Medicine, Woldia University, P.O. Box 400, Woldia, Ethiopia
| | - Seleshe Nigatu
- Department of Veterinary Epidemiology and Public Health, College of Veterinary Medicine and Animal Sciences, University of Gondar, P.O. Box 196, Gondar, Ethiopia
| | - Elias Kebede
- Department of Veterinary Pharmacy, College of Veterinary Medicine and Animal Sciences, University of Gondar, P.O. Box 196, Gondar, Ethiopia
| | - Abebe Belete Bitew
- Department of Veterinary Epidemiology and Public Health, College of Veterinary Medicine and Animal Sciences, University of Gondar, P.O. Box 196, Gondar, Ethiopia
| | - Yitayew Demessie
- Department of Biomedical Sciences, College of Veterinary Medicine and Animal Sciences, University of Gondar, P.O. Box 196, Gondar, Ethiopia
| | - Gashaw Getaneh
- Department of Biomedical Sciences, College of Veterinary Medicine and Animal Sciences, University of Gondar, P.O. Box 196, Gondar, Ethiopia
| | - Atnaf Alebie
- Department of Biomedical Sciences, College of Veterinary Medicine and Animal Sciences, University of Gondar, P.O. Box 196, Gondar, Ethiopia
| | - Musse Girma
- Aklilu Lema Institute of Pathobiology, Addis Ababa University, P.O. Box 9086, Addis Ababa, Ethiopia
| | - Fusao Ota
- Medical Department, Seto Institute for Health Care, Tokushima University, 163-2, 7-chome, Dokihigashi, Kagawa-ken, Marugame-shi, 763-0082, Japan
| | - Anwar Nuru
- Department of Paraclinical Sciences, College of Veterinary Medicine and Animal Sciences, University of Gondar, P.O. Box 196, Gondar, Ethiopia
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13
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Sánchez-Carvajal JM, Galán-Relaño Á, Ruedas-Torres I, Jurado-Martos F, Larenas-Muñoz F, Vera E, Gómez-Gascón L, Cardoso-Toset F, Rodríguez-Gómez IM, Maldonado A, Carrasco L, Tarradas C, Gómez-Laguna J, Luque I. Real-Time PCR Validation for Mycobacterium tuberculosis Complex Detection Targeting IS 6110 Directly From Bovine Lymph Nodes. Front Vet Sci 2021; 8:643111. [PMID: 33981742 PMCID: PMC8109245 DOI: 10.3389/fvets.2021.643111] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Accepted: 02/22/2021] [Indexed: 11/25/2022] Open
Abstract
Rapid and accurate diagnostic tools, such as Real-Time PCR (qPCR), need to be implemented as a confirmatory test in the framework of bovine tuberculosis (bTB) surveillance and control programs, shortening the turnaround time to confirm bTB infection. The present study aimed to evaluate a direct qPCR from fresh tissue samples targeting the insertion sequence IS6110 using individually homogenized bovine lymph nodes compared with microbiological culture. Retropharyngeal, tracheobronchial, and mesenteric lymph nodes fresh tissue samples (n = 687) were collected from 230 different cattle carcasses at the slaughterhouse. Only 23 of the 230 examined animals showed tuberculosis-like lesions, with 62 of 230 considered as positive. Among these 62 animals, 61 resulted as culture-positive, whereas 48 were qPCR-positive. Thus, this qPCR targeting IS6110 showed an apparent diagnostic sensitivity and specificity values of 77.1% [95% confidence interval (CI): 66.5–87.6%] and 99.4% (95% CI: 98.3–100.6%), respectively, and a positive predictive value of 97.9% (95% CI: 93.9–102.0%) and negative predictive value of 92.3% (95% CI: 88.4–96.2%). Positive and negative likelihood ratios were 130.2 and 0.2, respectively, and the agreement between microbiological culture and this qPCR was almost perfect (κ = 0.82). These results highlight this qPCR targeting IS6110 as a suitable complementary method to confirm bTB in animals with either tuberculosis-like lesions or non-tuberculosis-like lesions, decreasing the number of samples subjected to microbiological culture and, hence, its overall associated costs and the turnaround time (under 48 h) to confirm bTB infection. Besides, sampling mesenteric lymph node, which is uncommonly sampled, together with tracheobronchial and retropharyngeal ones, is advisable during postmortem inspection in bTB surveillance programs at the slaughterhouse, especially in areas with a low bTB prevalence scenario.
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Affiliation(s)
| | | | - Inés Ruedas-Torres
- Department of Anatomy and Comparative Pathology and Toxicology, University of Córdoba, Córdoba, Spain
| | | | - Fernanda Larenas-Muñoz
- Department of Anatomy and Comparative Pathology and Toxicology, University of Córdoba, Córdoba, Spain
| | - Eduardo Vera
- Department of Anatomy and Comparative Pathology and Toxicology, University of Córdoba, Córdoba, Spain.,Department of Animal Health, University of Córdoba, Córdoba, Spain
| | | | | | | | | | - Librado Carrasco
- Department of Anatomy and Comparative Pathology and Toxicology, University of Córdoba, Córdoba, Spain
| | - Carmen Tarradas
- Department of Animal Health, University of Córdoba, Córdoba, Spain
| | - Jaime Gómez-Laguna
- Department of Anatomy and Comparative Pathology and Toxicology, University of Córdoba, Córdoba, Spain
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14
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Direct PCR on Tissue Samples To Detect Mycobacterium tuberculosis Complex: an Alternative to the Bacteriological Culture. J Clin Microbiol 2021; 59:JCM.01404-20. [PMID: 33239374 DOI: 10.1128/jcm.01404-20] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Accepted: 11/17/2020] [Indexed: 12/20/2022] Open
Abstract
Bovine tuberculosis (bTB) is an ongoing issue in several countries within the European Union. Microbiological culture is the official confirmation technique for the presence of Mycobacterium tuberculosis complex (MTBC) members in bovine tissues, but several methodological issues, such as moderate sensitivity and long incubation times, require the development of more sensitive and rapid techniques. This study evaluates the analytical and diagnostic performance, comparative to culture, of a real-time PCR targeting the MTBC-specific IS6110 transposon using a panel of bovine tissue samples sourced from the Spanish bTB eradication campaign. Robustness and repeatability were evaluated in an interlaboratory trial between European Union National Reference Laboratories. The limit of detection with 95% confidence was established at 65 fg/reaction of purified genomic equivalents. Diagnostic sensitivity (Se) and specificity (Sp) were, respectively, 96.45% and 93.66%, and the overall agreement (κ) was 0.88. Cross-reactivity was detected against two mycobacterial isolates identified as Mycobacterium marinum and "Mycobacterium avium subsp. hominissuis," and whole-genome sequencing (WGS) analysis of the latter isolate revealed an IS6110-like sequence with 83% identity. An identical IS-like element was found in other Mycobacterium avium complex species in the NCBI nucleotide and WGS databases. Despite this finding, this methodology is considered a valuable alternative to culture, and the strategy of use should be defined depending on the control or eradication programs.
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15
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Santos E, Fehlberg I, Fernandes B, Alcântara AD, Silva B, Cerqueira R. Detection of Mycobacterium sp. by multiplex PCR directly from suspicious granulomas from cold chambers in the state of Bahia, Brazil. ARQUIVOS DO INSTITUTO BIOLÓGICO 2021. [DOI: 10.1590/1808-1657000592020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
| | | | | | | | - Bianca Silva
- Universidade Federal do Recôncavo da Bahia, Brazil
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16
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Martucciello A, Vitale N, Mazzone P, Dondo A, Archetti I, Chiavacci L, Cerrone A, Gamberale F, Schiavo L, Pacciarini ML, Boniotti MB, De Carlo E. Field Evaluation of the Interferon Gamma Assay for Diagnosis of Tuberculosis in Water Buffalo ( Bubalus bubalis) Comparing Four Interpretative Criteria. Front Vet Sci 2020; 7:563792. [PMID: 33335916 PMCID: PMC7736034 DOI: 10.3389/fvets.2020.563792] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Accepted: 11/05/2020] [Indexed: 12/30/2022] Open
Abstract
Bovine tuberculosis (bTB) is a worldwide zoonosis that affects many species of domestic and wild animals. Mycobaterium bovis is the main cause of infection in water buffalo (Bubalus bubalis) and bovines and is of great concern for human health and for buffalo producers in Italy. The bTB eradication programme is based on slaughterhouse surveillance and intradermal skin tests. Other in vivo diagnostic methods such as the interferon-gamma (IFN-γ) assay have been developed and are widely used in cattle to accelerate the elimination of bTB positive animals. The present study is the first to assess the use and performance of IFN-γ assays, which is used as an ancillary test for bTB diagnosis in water buffalo, and presents the results of a field-evaluation of the assay from 2012 to 2019 during the buffalo bTB eradication programme in Italy. The study involved 489 buffaloes with a positive result to the single intradermal tuberculin test (SITT). The IFN-γ assays and single intradermal comparative tuberculin test were used as confirmation tests. Then, a total of 458 buffaloes, reared on officially tuberculosis-free (OTF) herds, that were confirmed bTB-free for at least the last 6 years were subjected to IFN-γ testing. Furthermore, to evaluate the IFN-γ test in an OTF herd with Paratuberculosis (PTB) infection, 103 buffaloes were subjected to SITT and IFN-γ test simultaneously. Four interpretative criteria were used, and the IFN-γ test showed high levels of accuracy, with sensitivity levels between 75.3% (CI 95% 71.2–79.0%) and 98.4% (CI 95% 96.7–99.4%) and specificity levels between 94.3% (CI 95% 91.2–96.50%) and 98.5% (CI 95% 96.9–99.4%), depending on the criterion used. Finally, in the OTF herd with PTB infection, in buffalo, the IFN-γ test displayed high specificity values according to all 4 interpretative criteria, with specificity levels between 96.7% (CI 95% 88.4–99.5%) and 100% (CI 95% 96.2–100%), while SITT specificity proved unsatisfactory, with a level of 45.3% (CI 95% 35.0–55.7%). Our results showed that the IFN-γ test in the buffalo species could reach high Sensitivity and Specificity values, and that the level of Sensitivity and Specificity could be chosen based on the interpretative criterion and the antigens used depending on the health status of the herd and the epidemiological context of the territory. The IFN-γ test and the use of different interpretative criteria proved to be useful to implement bTB diagnostic strategies in buffalo herds, with the possibility of a flexible use of the assay.
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Affiliation(s)
- Alessandra Martucciello
- National Reference Centre for Hygiene and Technologies of Water Buffalo Farming and Productions, Istituto Zooprofilattico Sperimentale del Mezzogiorno, Salerno, Italy
| | - Nicoletta Vitale
- Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, Turin, Italy
| | - Piera Mazzone
- Istituto Zooprofilattico Sperimentale dell'Umbria e delle Marche "Togo Rosati", Perugia, Italy
| | - Alessandro Dondo
- Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, Turin, Italy
| | - Ivonne Archetti
- National Reference Centre for Bovine Tuberculosis, Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna, Brescia, Italy
| | - Laura Chiavacci
- Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, Turin, Italy
| | - Anna Cerrone
- National Reference Centre for Hygiene and Technologies of Water Buffalo Farming and Productions, Istituto Zooprofilattico Sperimentale del Mezzogiorno, Salerno, Italy
| | | | - Lorena Schiavo
- National Reference Centre for Hygiene and Technologies of Water Buffalo Farming and Productions, Istituto Zooprofilattico Sperimentale del Mezzogiorno, Salerno, Italy
| | - Maria Lodovica Pacciarini
- National Reference Centre for Bovine Tuberculosis, Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna, Brescia, Italy
| | - Maria Beatrice Boniotti
- National Reference Centre for Bovine Tuberculosis, Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna, Brescia, Italy
| | - Esterina De Carlo
- National Reference Centre for Hygiene and Technologies of Water Buffalo Farming and Productions, Istituto Zooprofilattico Sperimentale del Mezzogiorno, Salerno, Italy
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17
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Lekko YM, Ooi PT, Omar S, Mazlan M, Ramanoon SZ, Jasni S, Jesse FFA, Che-Amat A. Mycobacterium tuberculosis complex in wildlife: Review of current applications of antemortem and postmortem diagnosis. Vet World 2020; 13:1822-1836. [PMID: 33132593 PMCID: PMC7566238 DOI: 10.14202/vetworld.2020.1822-1836] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Accepted: 07/16/2020] [Indexed: 12/31/2022] Open
Abstract
Tuberculosis (TB) is a chronic inflammatory and zoonotic disease caused by Mycobacterium tuberculosis complex (MTBC) members, which affects various domestic animals, wildlife, and humans. Some wild animals serve as reservoir hosts in the transmission and epidemiology of the disease. Therefore, the monitoring and surveillance of both wild and domestic hosts are critical for prevention and control strategies. For TB diagnosis, the single intradermal tuberculin test or the single comparative intradermal tuberculin test, and the gamma-interferon test, which is regarded as an ancillary test, are used. Postmortem examination can identify granulomatous lesions compatible with a diagnosis of TB. In contrast, smears of the lesions can be stained for acid-fast bacilli, and samples of the affected organs can be subjected to histopathological analyses. Culture is the gold standard test for isolating mycobacterial bacilli because it has high sensitivity and specificity compared with other methods. Serology for antibody detection allows the testing of many samples simply, rapidly, and inexpensively, and the protocol can be standardized in different laboratories. Molecular biological analyses are also applicable to trace the epidemiology of the disease. In conclusion, reviewing the various techniques used in MTBC diagnosis can help establish guidelines for researchers when choosing a particular diagnostic method depending on the situation at hand, be it disease outbreaks in wildlife or for epidemiological studies. This is because a good understanding of various diagnostic techniques will aid in monitoring and managing emerging pandemic threats of infectious diseases from wildlife and also preventing the potential spread of zoonotic TB to livestock and humans. This review aimed to provide up-to-date information on different techniques used for diagnosing TB at the interfaces between wildlife, livestock, and humans.
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Affiliation(s)
- Yusuf Madaki Lekko
- Department of Veterinary Clinical Studies, Faculty of Veterinary Medicine, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia.,Department of Veterinary Medicine, Faculty of Veterinary Medicine, University of Maiduguri, 1069 PMB, Maiduguri, Borno State, Nigeria
| | - Peck Toung Ooi
- Department of Veterinary Clinical Studies, Faculty of Veterinary Medicine, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
| | - Sharina Omar
- Department of Veterinary Pathology and Microbiology, Faculty of Veterinary Medicine, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
| | - Mazlina Mazlan
- Department of Veterinary Pathology and Microbiology, Faculty of Veterinary Medicine, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
| | - Siti Zubaidah Ramanoon
- Department of Farm and Exotic Animal Medicine and Surgery, Faculty of Veterinary Medicine, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
| | - Sabri Jasni
- Department of Paraclinical, Faculty of Veterinary Medicine, Universiti Malaysia Kelantan, Pengkalan Chepa, 16100 Kota Bharu, Kelantan, Malaysia
| | - Faez Firdaus Abdullah Jesse
- Department of Veterinary Clinical Studies, Faculty of Veterinary Medicine, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
| | - Azlan Che-Amat
- Department of Veterinary Clinical Studies, Faculty of Veterinary Medicine, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
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18
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Elsohaby I, Mahmmod YS, Mweu MM, Ahmed HA, El-Diasty MM, Elgedawy AA, Mahrous E, El Hofy FI. Accuracy of PCR, mycobacterial culture and interferon-γ assays for detection of Mycobacterium bovis in blood and milk samples from Egyptian dairy cows using Bayesian modelling. Prev Vet Med 2020; 181:105054. [PMID: 32554290 DOI: 10.1016/j.prevetmed.2020.105054] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2020] [Revised: 06/05/2020] [Accepted: 06/05/2020] [Indexed: 01/31/2023]
Abstract
The number of bovine tuberculosis (bTB) infected dairy herds in Egypt is growing and this calls for accurate and reliable diagnostic methods at cow level for cost-effective bTB eradication as culling of the whole herd is not economically sustainable. The present study aimed to estimate the sensitivity (Se) and specificity (Sp) of PCR, mycobacterial culture and interferon-γ (IFN-γ) assays for Mycobacterium bovis (M. bovis) detection in blood and milk samples from dairy cows in Egyptian dairy herds within a Bayesian framework. As a secondary objective, the distribution of true within-herd prevalence of M. bovis infection was estimated. Blood and milk samples were collected from 245 Holstein dairy cows in 11 Egyptian dairy herds and subjected to PCR, mycobacterial culture and IFN-γ testing. With respect to the detection of M. bovis in blood, IFN-γ recorded higher Se [0.97 (95% Posterior Credible Interval (PCI): 0.87-1.00)] than PCR [0.68 (95% PCI: 0.53-0.95)] and culture [0.22 (95% PCI: 0.13-0.37)]. However, Sp estimates of PCR [0.98 (95% PCI: 0.95-1.00)], culture [0.99 (95% PCI: 0.98-1.00)] and IFN-γ [0.97 (95% PCI: 0.88-1.00)] were comparable. As for milk samples, Se estimate of PCR [0.29 (95% PCI: 0.01-0.60)] was higher than that of culture [0.08 (95% PCI: 0.001-0.23)]. However, the Sp estimates of both tests were statistically similar. The estimated true within-herd prevalences of M. bovis varied across the tested bovine subpopulations and ranged between 0.06 and 0.66. In conclusion, IFN-γ registered a similar overall performance to PCR but was superior to mycobacterial culture. With its good accuracy and wide applicability, IFN-γ lends itself to use in the Egyptian bTB eradication program.
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Affiliation(s)
- Ibrahim Elsohaby
- Department of Animal Medicine, Division of Infectious Diseases, Faculty of Veterinary Medicine, Zagazig University, Egypt; Department of Health Management, Atlantic Veterinary College, University of Prince Edward Island, Canada.
| | - Yasser S Mahmmod
- Department of Animal Medicine, Division of Infectious Diseases, Faculty of Veterinary Medicine, Zagazig University, Egypt; Section of Veterinary Sciences, Health Sciences Division, Al Ain Men's College, Higher Colleges of Technology, United Arab Emirates
| | - Marshal M Mweu
- School of Public Health, College of Health Sciences, University of Nairobi, Nairobi, Kenya
| | - Heba A Ahmed
- Department of Zoonoses, Faculty of Veterinary Medicine, Zagazig University, Egypt
| | | | | | - Eman Mahrous
- Animal Health Research Institute, Dokki, 12618, Giza, Egypt
| | - Fatma I El Hofy
- Department of Bacteriology, Immunology and Mycology, Faculty of Veterinary Medicine, Benha University, Egypt
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Angelidou A, Diray-Arce J, Conti MG, Smolen KK, van Haren SD, Dowling DJ, Husson RN, Levy O. BCG as a Case Study for Precision Vaccine Development: Lessons From Vaccine Heterogeneity, Trained Immunity, and Immune Ontogeny. Front Microbiol 2020; 11:332. [PMID: 32218774 PMCID: PMC7078104 DOI: 10.3389/fmicb.2020.00332] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Accepted: 02/14/2020] [Indexed: 12/11/2022] Open
Abstract
Vaccines have been traditionally developed with the presumption that they exert identical immunogenicity regardless of target population and that they provide protection solely against their target pathogen. However, it is increasingly appreciated that vaccines can have off-target effects and that vaccine immunogenicity can vary substantially with demographic factors such as age and sex. Bacille Calmette-Guérin (BCG), the live attenuated Mycobacterium bovis vaccine against tuberculosis (TB), represents a key example of these concepts. BCG vaccines are manufactured under different conditions across the globe generating divergent formulations. Epidemiologic studies have linked early life immunization with certain BCG formulations to an unanticipated reduction (∼50%) in all-cause mortality, especially in low birthweight males, greatly exceeding that attributable to TB prevention. This mortality benefit has been related to prevention of sepsis and respiratory infections suggesting that BCG induces "heterologous" protection against unrelated pathogens. Proposed mechanisms for heterologous protection include vaccine-induced immunometabolic shifts, epigenetic reprogramming of innate cell populations, and modulation of hematopoietic stem cell progenitors resulting in altered responses to subsequent stimuli, a phenomenon termed "trained immunity." In addition to genetic differences, licensed BCG formulations differ markedly in content of viable mycobacteria key for innate immune activation, potentially contributing to differences in the ability of these diverse formulations to induce TB-specific and heterologous protection. BCG immunomodulatory properties have also sparked interest in its potential use to prevent or alleviate autoimmune and inflammatory diseases, including type 1 diabetes mellitus and multiple sclerosis. BCG can also serve as a model: nanoparticle vaccine formulations incorporating Toll-like receptor 8 agonists can mimic some of BCG's innate immune activation, suggesting that aspects of BCG's effects can be induced with non-replicating stimuli. Overall, BCG represents a paradigm for precision vaccinology, lessons from which will help inform next generation vaccines.
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Affiliation(s)
- Asimenia Angelidou
- Division of Newborn Medicine, Boston Children’s Hospital and Beth Israel Deaconess Medical Center, Boston, MA, United States
- Precision Vaccines Program, Boston Children’s Hospital, Boston, MA, United States
- Harvard Medical School, Boston, MA, United States
| | - Joann Diray-Arce
- Precision Vaccines Program, Boston Children’s Hospital, Boston, MA, United States
- Harvard Medical School, Boston, MA, United States
- Division of Infectious Diseases, Boston Children’s Hospital, Boston, MA, United States
| | - Maria Giulia Conti
- Precision Vaccines Program, Boston Children’s Hospital, Boston, MA, United States
- Department of Maternal and Child Health, Sapienza University of Rome, Rome, Italy
| | - Kinga K. Smolen
- Precision Vaccines Program, Boston Children’s Hospital, Boston, MA, United States
- Harvard Medical School, Boston, MA, United States
- Division of Infectious Diseases, Boston Children’s Hospital, Boston, MA, United States
| | - Simon Daniël van Haren
- Precision Vaccines Program, Boston Children’s Hospital, Boston, MA, United States
- Harvard Medical School, Boston, MA, United States
- Division of Infectious Diseases, Boston Children’s Hospital, Boston, MA, United States
| | - David J. Dowling
- Precision Vaccines Program, Boston Children’s Hospital, Boston, MA, United States
- Harvard Medical School, Boston, MA, United States
- Division of Infectious Diseases, Boston Children’s Hospital, Boston, MA, United States
| | - Robert N. Husson
- Harvard Medical School, Boston, MA, United States
- Division of Infectious Diseases, Boston Children’s Hospital, Boston, MA, United States
| | - Ofer Levy
- Precision Vaccines Program, Boston Children’s Hospital, Boston, MA, United States
- Harvard Medical School, Boston, MA, United States
- Division of Infectious Diseases, Boston Children’s Hospital, Boston, MA, United States
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20
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Angelidou A, Conti MG, Diray-Arce J, Benn CS, Shann F, Netea MG, Liu M, Potluri LP, Sanchez-Schmitz G, Husson R, Ozonoff A, Kampmann B, van Haren SD, Levy O. Licensed Bacille Calmette-Guérin (BCG) formulations differ markedly in bacterial viability, RNA content and innate immune activation. Vaccine 2020; 38:2229-2240. [PMID: 32005538 PMCID: PMC7556328 DOI: 10.1016/j.vaccine.2019.11.060] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2019] [Revised: 10/24/2019] [Accepted: 11/25/2019] [Indexed: 12/12/2022]
Abstract
BACKGROUND Bacille Calmette-Guérin (BCG), the live attenuated tuberculosis vaccine, is manufactured under different conditions across the globe generating formulations that may differ in clinical efficacy. Innate immune recognition of live BCG contributes to immunogenicity suggesting that differences in BCG viability may contribute to divergent activity of licensed formulations. METHODS We compared BCG-Denmark (DEN), -Japan (JPN), -India (IND), -Bulgaria (BUL) and -USA in vitro with respect to a) viability as measured by colony-forming units (CFU), mycobacterial membrane integrity, and RNA content, and b) cytokine/chemokine production in newborn cord and adult peripheral blood. RESULTS Upon culture, relative growth was BCG-USA > JPN ≫ DEN > BUL = IND. BCG-IND and -BUL demonstrated >1000-fold lower growth than BCG-JPN in 7H9 medium and >10-fold lower growth in commercial Middlebrook 7H11 medium. BCG-IND demonstrated significantly decreased membrane integrity, lower RNA content, and weaker IFN-γ inducing activity in whole blood compared to other BCGs. BCG-induced whole blood cytokines differed significantly by age, vaccine formulation and concentration. BCG-induced cytokine production correlated with CFU, suggesting that mycobacterial viability may contribute to BCG-induced immune responses. CONCLUSIONS Licensed BCG vaccines differ markedly in their content of viable mycobacteria possibly contributing to formulation-dependent activation of innate and adaptive immunity and distinct protective effects.
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Affiliation(s)
- Asimenia Angelidou
- Division of Newborn Medicine, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA; Precision Vaccines Program, Division of Infectious Diseases, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA; Department of Pediatrics, Harvard Medical School, Boston, MA 02115, USA.
| | - Maria-Giulia Conti
- Precision Vaccines Program, Division of Infectious Diseases, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA; Department of Pediatrics, Sapienza University of Rome, Rome 00185, Italy.
| | - Joann Diray-Arce
- Precision Vaccines Program, Division of Infectious Diseases, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA.
| | - Christine S Benn
- OPEN, Odense Patient Data Explorative Network, Odense University Hospital/Institute of Clinical Research, University of Southern Denmark, 5000 Odense C, Denmark.
| | - Frank Shann
- Department of Pediatrics, Royal Children's Hospital, University of Melbourne, Victoria 3052 Australia.
| | - Mihai G Netea
- Department of Internal Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, Netherlands; Department for Genomics & Immunoregulation, Life and Medical Sciences Institute (LIMES), University of Bonn, 53115 Bonn, Germany.
| | - Mark Liu
- Precision Vaccines Program, Division of Infectious Diseases, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Lakshmi Prasad Potluri
- Precision Vaccines Program, Division of Infectious Diseases, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA.
| | - Guzman Sanchez-Schmitz
- Precision Vaccines Program, Division of Infectious Diseases, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA; Department of Pediatrics, Harvard Medical School, Boston, MA 02115, USA.
| | - Robert Husson
- Precision Vaccines Program, Division of Infectious Diseases, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA; Department of Pediatrics, Harvard Medical School, Boston, MA 02115, USA.
| | - Al Ozonoff
- Precision Vaccines Program, Division of Infectious Diseases, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA; Department of Pediatrics, Harvard Medical School, Boston, MA 02115, USA.
| | - Beate Kampmann
- Vaccine Centre, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, Keppel Street, London WC1E 7HT, UK; Vaccines & Immunity Theme, Medical Research Council Unit The Gambia at the London School of Hygiene and Tropical Medicine, Fajara, PO Box 273, Banjul, Gambia.
| | - Simon Daniël van Haren
- Precision Vaccines Program, Division of Infectious Diseases, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA; Department of Pediatrics, Harvard Medical School, Boston, MA 02115, USA.
| | - Ofer Levy
- Precision Vaccines Program, Division of Infectious Diseases, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA; Department of Pediatrics, Harvard Medical School, Boston, MA 02115, USA; Broad Institute of MIT & Harvard, Cambridge, MA 02142, USA.
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21
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Richomme C, Courcoul A, Moyen JL, Reveillaud É, Maestrini O, de Cruz K, Drapeau A, Boschiroli ML. Tuberculosis in the wild boar: Frequentist and Bayesian estimations of diagnostic test parameters when Mycobacterium bovis is present in wild boars but at low prevalence. PLoS One 2019; 14:e0222661. [PMID: 31550287 PMCID: PMC6759143 DOI: 10.1371/journal.pone.0222661] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Accepted: 09/04/2019] [Indexed: 12/25/2022] Open
Abstract
The Eurasian wild boar (Sus scrofa) is increasingly considered as a relevant actor in the epidemiology of animal tuberculosis (TB). Therefore, monitoring TB in this species is key when establishing comprehensive control schemes for this disease still present in Europe. No data are available on direct and indirect TB diagnostic methods in wild boars in epidemiological contexts where TB is endemic in cattle and detected in wild boars at low prevalence. We aimed to estimate and compare sensitivity and specificity values for bacterial culture, PCR and three commercial ELISAs, i.e. the TB ELISA-VK (using the bPPD antigen), INgezim TB Porcine and IDEXX M. bovis Ab Test (both using the MPB83 and MPB70 antigens), under field conditions in France. We used frequentist methods, with bacteriology as the gold standard, and a Bayesian formulation of the latent class analysis (LCA), without using a gold standard. Submandibular lymph nodes and sera from 495 wild boars hunter-harvested in three endemic areas (Aquitaine region, Côte d’Or region, and Corsica region) were collected between 2014 and 2016. Only eight individuals were positive for M. bovis by bacteriology (1.61%; CI95% 0.70–3.51%). The LCA method provided high specificities (99.2%; CI95% 98.2–99.8% for INgezim TB Porcine and 99.7%; CI95% 98.8–100% for IDEXX M. bovis Ab Test) and sensitivities (78.5%; CI95% 65.1–88.8% for INgezim TB Porcine and 83.9%; CI95% 58.9–97.2% for IDEXX M. bovis Ab Test) for both ELISAs using the MPB83 and MPB70 antigens. Bacterial culture showed limited sensitivity (42.8%; CI95% 19.0–70.6%), estimated as the probability of a positive result in an animal exposed to M. bovis. PCR and ELISA using the bPPD antigens demonstrated high specificities, and sensitivities intermediates between culture and the ELISAs using the MPB83 and MPB70 antigens. These results suggest that ELISA tests using the MPB83 and MPB70 antigens are useful to detect and monitor TB exposure of wild boar populations in field conditions in France.
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Affiliation(s)
- Céline Richomme
- Nancy Laboratory for Rabies and Wildlife, ANSES, Malzéville, France
| | - Aurélie Courcoul
- University Paris-Est, Laboratory for Animal Health, Epidemiology Unit, ANSES, Maisons-Alfort, France
| | - Jean-Louis Moyen
- Laboratoire Départemental d’Analyse et de Recherche de la Dordogne, Coulounieix-Chamiers, France
| | - Édouard Reveillaud
- Unit of Coordination and Support to Surveillance, ANSES, Maisons-Alfort, France
| | | | - Krystel de Cruz
- University Paris-Est, Laboratory for Animal Health, Tuberculosis National Reference Laboratory, ANSES, Maisons-Alfort, France
| | - Antoine Drapeau
- University Paris-Est, Laboratory for Animal Health, Tuberculosis National Reference Laboratory, ANSES, Maisons-Alfort, France
| | - Maria Laura Boschiroli
- University Paris-Est, Laboratory for Animal Health, Tuberculosis National Reference Laboratory, ANSES, Maisons-Alfort, France
- * E-mail:
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22
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Evaluation of post-mortem diagnostic tests' sensitivity and specificity for bovine tuberculosis using Bayesian latent class analysis. Res Vet Sci 2019; 125:14-23. [PMID: 31108426 DOI: 10.1016/j.rvsc.2019.04.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 04/18/2019] [Accepted: 04/22/2019] [Indexed: 12/27/2022]
Abstract
This study aimed to evaluate the performance of real-time PCR (qPCR), ELISA IDEXX™, and bacterial isolation as post-mortem diagnostic tests in animals with lesions compatible with bovine tuberculosis detected by Brazilian Federal Inspection Service as part of the bovine tuberculosis active surveillance. Bayesian latent class models were used to estimate diagnostic tests' sensitivity, specificity, correlations, predictive values and frequency of infected animals. Samples of tuberculosis-suggestive lesions collected by FIS sanitary inspection routine in slaughterhouses from 11 Brazilian states were analyzed. Isolation was the most sensitive technique, 94.54% (95% Credible Interval (CrI) 90.09%-97.65%), qPCR was 64.69% (95% CrI 54.41%-74.15%) sensitive and ELISA IDEXX™ 26.74% (95% CrI 22.82%-30.97%). Tests' specificities were 98.19% (95% CrI 95.75%-99.45%), 93.49% (95% CrI 79.28%-99.66%), 95.53% (95% CrI 91.71%-98.02%) respectively. Despite its low sensitivity, ELISA IDEXX™ was able to identify positive samples that were not detected by the other techniques. These samples had high probability to be true positives given ELISA's positive predictive value. The correlations between qPCR and isolation were neither biologically nor statistically significant. The low sensitivity of the qPCR is a limiting factor to its use as a post-mortem diagnosis in bovine tuberculosis suggestive lesions. Its use could be recommended in situations of high prevalence, or in parallel association with other tests, such as ELISA IDEXX™. ELISA IDDEX™ should not be used as a unique test, or in substitution of the other tests, for the post-mortem diagnosis of bovine tuberculosis due to its sensitivity.
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23
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Lorente-Leal V, Liandris E, Castellanos E, Bezos J, Domínguez L, de Juan L, Romero B. Validation of a Real-Time PCR for the Detection of Mycobacterium tuberculosis Complex Members in Bovine Tissue Samples. Front Vet Sci 2019; 6:61. [PMID: 30886855 PMCID: PMC6409304 DOI: 10.3389/fvets.2019.00061] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 02/12/2019] [Indexed: 11/25/2022] Open
Abstract
Although the post-mortem diagnosis of bovine tuberculosis is mainly achieved through microbiological culture, the development of other techniques to detect Mycobacterium tuberculosis complex (MTBC) members directly from tissue samples has been pursued. The present study describes the development, optimization and validation of a Real-Time PCR based on the mpb70 gene to detect MTBC members in clinical tissue samples from cattle. Specific primers and a hybridization probe were used to amplify MTBC-specific sequences in order to avoid cross-reaction with non-MTBC species. An Internal Amplification Control (IAC) was included in order to assess the presence of PCR inhibitors in the samples. The PCR was optimized to achieve maximum efficiency, and the limit of detection, limit of quantification and dynamic range of the reaction were determined. The specificity of the reaction was tested against 34 mycobacterial and non-mycobacterial species. The diagnostic sensitivity, specificity and positive and negative predictive values (PPV and NPV) of the method were assessed on 200 bovine tissue samples in relation to bacteriological culture. The dynamic range of the reaction spanned from 5 ng/reaction (106 genome equivalents) to 50 fg/reaction (10 genome equivalents). The efficiency of the reaction was 102.6% and the achieved R2 was 0.999. The limit of detection with 95% confidence was 10 genome equivalents/reaction. No cross-reactions with non-MTBC species were observed. The diagnostic sensitivity and specificity values of the mpb70 specific Real-Time PCR respect to culture were 94.59% (95% CI: 86.73–98.51%) and 96.03% (95% CI: 90.98–98.70%), respectively, with a PPV of 93.33% (95% CI: 85.55–97.07%) and a NPV of 96.80% (95% CI: 92.10–98.74%). The concordance of the Real-Time PCR based on mpb70 is comparable to that of culture (K = 0.904) showing a great potential for the detection of members of the MTBC in animal tissues.
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Affiliation(s)
- Victor Lorente-Leal
- VISAVET Health Surveillance Center, Complutense University of Madrid, Madrid, Spain.,Animal Health Department, Veterinary Faculty, Complutense University of Madrid, Madrid, Spain
| | - Emmanouil Liandris
- VISAVET Health Surveillance Center, Complutense University of Madrid, Madrid, Spain
| | | | - Javier Bezos
- VISAVET Health Surveillance Center, Complutense University of Madrid, Madrid, Spain.,Animal Health Department, Veterinary Faculty, Complutense University of Madrid, Madrid, Spain
| | - Lucas Domínguez
- VISAVET Health Surveillance Center, Complutense University of Madrid, Madrid, Spain.,Animal Health Department, Veterinary Faculty, Complutense University of Madrid, Madrid, Spain
| | - Lucía de Juan
- VISAVET Health Surveillance Center, Complutense University of Madrid, Madrid, Spain.,Animal Health Department, Veterinary Faculty, Complutense University of Madrid, Madrid, Spain
| | - Beatriz Romero
- VISAVET Health Surveillance Center, Complutense University of Madrid, Madrid, Spain
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24
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Grooms DL, Bolin SR, Plastow JL, Lim A, Hattey J, Durst PT, Rust SR, Allen MS, Buskirk DD, Smith RW. Survival of Mycobacterium bovis during forage ensiling. Am J Vet Res 2019; 80:87-94. [PMID: 30605026 DOI: 10.2460/ajvr.80.1.87] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To determine whether Mycobacterium bovis remains viable in ensiled forages. SAMPLE Alfalfa, mixed mostly grass, and corn silages. PROCEDURES For each of 10 sampling days, six 250-g replicate samples of each feedstuff were created and placed in a film pouch that could be vacuum sealed to simulate the ensiling process. Within each set of replicate samples, 4 were inoculated with 10 mL of mycobacterial liquid culture medium containing viable M bovis and 2 were inoculated with 10 mL of sterile mycobacterial liquid culture medium (controls) on day 0. Pouches were vacuum sealed and stored in the dark at room temperature. On the designated sampling day, 1 control pouch was submitted for forage analysis, and the other pouches were opened, and forage samples were obtained for M bovis culture and analysis with a PCR assay immediately and 24 hours later. RESULTS None of the control samples had positive M bovis culture or PCR assay results. Among M bovis-inoculated samples, the organism was not cultured from alfalfa and corn silage for > 2 days but was cultured from mixed mostly grass silage for 28 days after inoculation and ensiling initiation. Mycobacterium bovis DNA was detected by PCR assay in samples of all 3 feedstuffs throughout the 112-day observation period. CONCLUSIONS AND CLINICAL RELEVANCE Results suggested that properly ensiled forages would be an unlikely source for M bovis transmission to cattle. Further research is necessary to determine whether ensiling kills M bovis or forces it to become dormant and, if the latter, elucidate the conditions that cause it to revert to an infectious state.
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Sattar A, Zakaria Z, Abu J, Aziz SA, Gabriel RP. Evaluation of six decontamination procedures for isolation of Mycobacterium avium complex from avian feces. PLoS One 2018; 13:e0202034. [PMID: 30096205 PMCID: PMC6086441 DOI: 10.1371/journal.pone.0202034] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Accepted: 07/26/2018] [Indexed: 11/18/2022] Open
Abstract
Culture is considered the gold standard for definitive diagnosis of mycobacterial infections. However, consensus about the most suitable culture procedure for isolation of nontuberculous mycobacteria is lacking. The study compared the recoveries of mycobacteria after decontamination of spiked and fresh avian feces with 4% sodium hydroxide (NaOH), 12% sulfuric acid (H2SO4), or 1% cetylperidinium chloride (CPC), with and without mixture of three antibiotics, namely vancomycin (VAN, 100 μg/ml), nalidixic acid (NAL, 100 μg/ml), and amphotericin B (AMB, 100 μg/ml). The antibiotic mixture was referred to as VNA. Decontamination procedures were evaluated using two (n = 2) avian fecal samples spiked with 106, 104, and 102 CFU/ml of Mycobacterium avium subsp. avium (ATCC 15769) and fresh avian feces (n = 42). M. avium subsp. avium was detected on the culture media from spiked samples (106 and 104 CFU/ml) decontaminated with NaOH, NaOH-VNA, H2SO4, and H2SO4 -VNA for 2-6 weeks. These bacteria were detected in 2-4 weeks when using CPC and CPC-VNA. M. avium subsp. avium cannot be isolated on culture media from spiked samples (102 CFU/ml) decontaminated with any decontaminating agent. Two mycobacterial isolates, namely, Mycobacterium terrae and M. engbaekii, were isolated from field samples decontaminated with NaOH and CPC-VNA. With regard to the contamination rate, the use of CPC-VNA showed lower contamination rates (5.5% and 19.0%) from spiked and field samples than those of the other methods (NaOH: 22.2% and 59.5%, NaOH-VNA: 16.7% and 21.4%, H2SO4: 11.1% and 40.5%, H2SO4-VNA: 5.5% and 21.4%, and CPC: 66.7% and 50%). In conclusion, the decontamination of fecal samples following a two-step procedure with 1% CPC and VNA can ensure high recovery rate of many mycobacteria with the lowest contamination in cultures.
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Affiliation(s)
- Abdul Sattar
- Department of Veterinary Pathology and Microbiology, Faculty of Veterinary Medicine, Universiti Putra Malaysia UPM, Selangor, Malaysia
| | - Zunita Zakaria
- Department of Veterinary Pathology and Microbiology, Faculty of Veterinary Medicine, Universiti Putra Malaysia UPM, Selangor, Malaysia
| | - Jalila Abu
- Department of Clinical Studies, Faculty of Veterinary Medicine, Universiti Putra Malaysia UPM, Selangor, Malaysia
| | - Saleha A. Aziz
- Department of Veterinary Pathology and Microbiology, Faculty of Veterinary Medicine, Universiti Putra Malaysia UPM, Selangor, Malaysia
| | - Rojas-Ponce Gabriel
- Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Canada
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Willeberg PW, McAloon CG, Houtsma E, Higgins I, Clegg TA, More SJ. The Herd-Level Sensitivity of Abattoir Surveillance for Bovine Tuberculosis: Simulating the Effects of Current and Potentially Modified Meat Inspection Procedures in Irish Cattle. Front Vet Sci 2018; 5:82. [PMID: 29876359 PMCID: PMC5974157 DOI: 10.3389/fvets.2018.00082] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Accepted: 04/03/2018] [Indexed: 11/13/2022] Open
Abstract
The European Food Safety Authority (EFSA) has published a series of opinions to assess the impact of changing from the current meat inspection procedures (CMI) to visual-only inspection (VOI) procedures. Concern has been raised that changes from CMI to VOI would adversely affect the effectiveness of surveillance for bovine tuberculosis (bTB) in EU member states, both for countries with and without official status of bTB freedom (OTF and non-OTF countries, respectively). This study was conducted to estimate the impact of a change from CMI to VOI in abattoirs on herd-level detection sensitivity in Ireland, a non-OTF country. Using national Irish data, we identified all herds that sold at least one animal to slaughter during 2010-12 whilst unrestricted for bTB. For each of these herds, we calculated the number of cattle sent to slaughter whilst unrestricted, the number of factory lesion tests (FLT) that had been performed, and estimated the apparent within-herd prevalence (APwh). A FLT is a whole-herd test conducted in a herd following the confirmation of bTB in an animal at slaughter. We considered five different inspection scenarios, each based on meat inspection and bacteriology in series, including current meat inspection (CMI) and four visual-only inspection scenarios (VOI2, VOI3, VOI4, VOI5) with reducing inspection sensitivities. Separately for each inspection scenario, a simulation model was used to estimate the herd-level detection sensitivity and the number of bTB-herds (that is, herds that sent at least one animal detected with M. bovis to slaughter when unrestricted during 2010-12) that would and would not be detected. The simulated mean herd-level detection sensitivity estimates were 0.24 for CMI, and 0.16, 0.12, 0.10 and 0.08 for VOI2-5, assuming a 2-, 3-, 4- and 5-fold decrease, respectively, in the animal-level detection sensitivity of VOI relative to that of CMI. The estimated number of non-detected bTB-herds is substantial with CMI, and increases in the series of VOI scenarios with decreasing herd-level detection sensitivity. If VOI were introduced without alternative surveillance means to compensate for the decrease in animal-level inspection sensitivity, such changes might jeopardise bTB surveillance, control and eradication programmes in cattle herds of non-OTF countries, including Ireland.
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Affiliation(s)
- Preben W. Willeberg
- Department of Diagnostic and Scientific Advice, National Veterinary Institute, Technical University of Denmark, Copenhagen, Denmark
| | - Conor G. McAloon
- Section of Herd Health and Animal Husbandry, UCD School of Veterinary Medicine, University College Dublin, Dublin, Ireland
| | - Erik Houtsma
- Centre for Veterinary Epidemiology and Risk Analysis, UCD School of Veterinary Medicine, University College Dublin, Dublin, Ireland
| | - Isabella Higgins
- Centre for Veterinary Epidemiology and Risk Analysis, UCD School of Veterinary Medicine, University College Dublin, Dublin, Ireland
| | - Tracy Ann Clegg
- Centre for Veterinary Epidemiology and Risk Analysis, UCD School of Veterinary Medicine, University College Dublin, Dublin, Ireland
| | - Simon J. More
- Centre for Veterinary Epidemiology and Risk Analysis, UCD School of Veterinary Medicine, University College Dublin, Dublin, Ireland
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27
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Djemal SE, Siala M, Smaoui S, Kammoun S, Marouane C, Bezos J, Messadi-Akrout F, Romero B, Gdoura R. Genetic diversity assessment of Tunisian Mycobacterium bovis population isolated from cattle. BMC Vet Res 2017; 13:393. [PMID: 29246228 PMCID: PMC5732386 DOI: 10.1186/s12917-017-1314-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Accepted: 12/06/2017] [Indexed: 12/16/2022] Open
Abstract
Background The genetic diversity of M. bovis in Tunisia is still underestimated despite the implementation of an eradication program. The lack of data about spatial distribution of the M. bovis population hinders the control of bovine tuberculosis (bTB) progress. This study represents the largest molecular analysis of M. bovis isolates in Tunisia. It is aimed to upgrade the understanding of bTB epidemiology and the geographical distribution of the infection. Tuberculosis research was performed in cattle (n = 149) with TB-compatible lesions collected over 5 months from a slaughterhouse located in Sfax, Tunisia. Results Ninety-four animals were found to be infected by M. bovis and two others by M. caprae. Spoligotyping revealed twenty-five patterns, SB0120, SB0134, and SB0121 being the most prevalent profiles (36.4%, 11.4%, and 7.2%, respectively). Three new spoligotypes were detected: SB2345, SB2344 and SB2343. MIRU-VNTR analysis classified the isolates in seventy-three profiles and showed a large genotypic variety observed within the main spoligotype which was split into several MIRU-VNTR types: 29 in SB0120 (h = 0.983), 10 in SB0134 (h = 0.981) and 7 in SB0121 (h = 1). Genotyping revealed a common pattern in different geographic regions. It also showed that Sfax, located in southern-Tunisia, represents a high-risk area with an elevated genetic diversity. Conclusions Spatial analysis may provide insights into disease transmission, which affects the effectiveness of eradication campaigns in cattle. Electronic supplementary material The online version of this article (10.1186/s12917-017-1314-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Saif Eddine Djemal
- Department of Life Sciences, Research Laboratory of Environmental Toxicology-Microbiology and Health (LR17ES06), Faculty of Sciences, University of Sfax-Tunisia, Sfax, Tunisia.
| | - Mariam Siala
- Department of Life Sciences, Research Laboratory of Environmental Toxicology-Microbiology and Health (LR17ES06), Faculty of Sciences, University of Sfax-Tunisia, Sfax, Tunisia.,Department of Biology, Preparatory Institute for Engineering Studies, University of Sfax-Tunisia, Sfax, Tunisia
| | - Salma Smaoui
- Department of Microbiology, Regional Hygiene Care Mycobacteriology Laboratory, Hedi-Chaker University Hospital, Sfax, Tunisia.,Department of Biology, Faculty of Pharmacy, University of Monastir-Tunisia, Monastir, Tunisia.,Department of Microbiology, National Reference Laboratory of Mycobacteria, Research Unit (UR12SP18), A, Mami University Hospital of Pneumology, Ariana, Tunisia
| | - Sana Kammoun
- Department of Microbiology, Regional Hygiene Care Mycobacteriology Laboratory, Hedi-Chaker University Hospital, Sfax, Tunisia.,Department of Biology, Faculty of Pharmacy, University of Monastir-Tunisia, Monastir, Tunisia.,Department of Microbiology, National Reference Laboratory of Mycobacteria, Research Unit (UR12SP18), A, Mami University Hospital of Pneumology, Ariana, Tunisia
| | - Chema Marouane
- Department of Microbiology, Regional Hygiene Care Mycobacteriology Laboratory, Hedi-Chaker University Hospital, Sfax, Tunisia.,Department of Biology, Faculty of Pharmacy, University of Monastir-Tunisia, Monastir, Tunisia.,Department of Microbiology, National Reference Laboratory of Mycobacteria, Research Unit (UR12SP18), A, Mami University Hospital of Pneumology, Ariana, Tunisia
| | - Javier Bezos
- , MAEVA SERVET SL. C/ de la Fragua 3, 28749, Alameda del Valle, Madrid, Spain.,Centro de Vigilancia Sanitaria Veterinaria (VISAVET), Universidad Complutense, Avda. Puerta de Hierro s/n, 28040, Madrid, Spain
| | - Feriele Messadi-Akrout
- Department of Microbiology, Regional Hygiene Care Mycobacteriology Laboratory, Hedi-Chaker University Hospital, Sfax, Tunisia.,Department of Biology, Faculty of Pharmacy, University of Monastir-Tunisia, Monastir, Tunisia.,Department of Microbiology, National Reference Laboratory of Mycobacteria, Research Unit (UR12SP18), A, Mami University Hospital of Pneumology, Ariana, Tunisia
| | - Beatriz Romero
- Centro de Vigilancia Sanitaria Veterinaria (VISAVET), Universidad Complutense, Avda. Puerta de Hierro s/n, 28040, Madrid, Spain
| | - Radhouane Gdoura
- Department of Life Sciences, Research Laboratory of Environmental Toxicology-Microbiology and Health (LR17ES06), Faculty of Sciences, University of Sfax-Tunisia, Sfax, Tunisia
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Leth C, Varadharajan A, Mester P, Fischaleck M, Rossmanith P, Schmoll F, Fink M. Matrixlysis, an improved sample preparation method for recovery of Mycobacteria from animal tissue material. PLoS One 2017; 12:e0181157. [PMID: 28723969 PMCID: PMC5517009 DOI: 10.1371/journal.pone.0181157] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Accepted: 06/27/2017] [Indexed: 11/18/2022] Open
Abstract
Mycobacterium caprae, a member of the Mycobacterium tuberculosis complex, is the main causative agent of bovine tuberculosis in alpine regions. Bacterial culture is the gold standard in bovine tuberculosis diagnostic but takes up to twelve weeks. This increases the time and costs for stocks affected with bovine tuberculosis. Hence this study focused on the implementation of a fast and precise mycobacterial detection method and compared it with currently used methods. Matrix lysis is a chemical lysis using high concentrations of urea to solubilize bovine and red deer tissue and was used to detect even smallest amounts or non-visible lesions of mycobacteria. A total of 64 samples collected from 44 animals (37 red deer and 7 cattle) were tested by Matrix lysis. Forty-three of these samples were used for Mycobacterium tuberculosis complex detection by quantitative PCR and other 21 for subtyping the genetically different variants of M. caprae. Furthermore, three Matrix lysis samples were used for Next Generation Sequencing. Our results confirm that Matrix lysis is a fast and precise method for detecting Mycobacterium tuberculosis complex in native tissue samples. However, at the moment it reaches its limits when the samples were analyzed by Next Generation Sequencing and RD4 subtyping.
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Affiliation(s)
- Christoph Leth
- Austrian Agency for Health and Food Safety, Institute for Veterinary Disease Control, Moedling, Lower Austria, Austria
- University of Applied Sciences FH Campus Wien, Vienna, Austria
| | - Ashok Varadharajan
- Laboratory for Functional Genome Analysis (LAFUGA), Gene Centre, LMU Munich, Munich, Germany
| | - Patrick Mester
- Christian Doppler Laboratory for Monitoring of Microbial Contaminants, University of Veterinary Medicine, Vienna, Austria
| | - Marlis Fischaleck
- Laboratory for Functional Genome Analysis (LAFUGA), Gene Centre, LMU Munich, Munich, Germany
| | - Peter Rossmanith
- Christian Doppler Laboratory for Monitoring of Microbial Contaminants, University of Veterinary Medicine, Vienna, Austria
| | - Friedrich Schmoll
- Austrian Agency for Health and Food Safety, Institute for Veterinary Disease Control, Moedling, Lower Austria, Austria
| | - Maria Fink
- Austrian Agency for Health and Food Safety, Institute for Veterinary Disease Control, Moedling, Lower Austria, Austria
- * E-mail:
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29
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Yates GF, Price-Carter M, Bland K, Joyce MA, Khan F, Surrey M, de Lisle GW. Comparison of the BBL mycobacteria growth indicator tube, the BACTEC 12B, and solid media for the isolation of Mycobacterium bovis. J Vet Diagn Invest 2017; 29:508-512. [PMID: 28460600 DOI: 10.1177/1040638717697763] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
We compared different methods for their ability to isolate Mycobacterium bovis from tissue samples from animals with lesions resembling bovine tuberculosis. In the first trial, M. bovis was isolated from 86 of 200 tissue samples that were cultured using 2 liquid media, BACTEC 12B and BBL mycobacteria growth indicator tube (MGIT), and a solid medium, Middlebrook 7H11 supplemented with pyruvate (7H11P). M. bovis was isolated from 2 samples with MGIT but not BACTEC 12B. M. bovis was isolated from 9 samples with BACTEC but not MGIT; these 9 samples came from the North Canterbury/Marlborough region of New Zealand. The proportion of tissues from which M. bovis was isolated with BACTEC 12B or MGIT and the mean time for isolation was different for samples from the North Canterbury/Marlborough region but not the rest of New Zealand. In the second trial, M. bovis was isolated from 401 of 1,033 tissues that were cultured using MGIT, Middlebrook 7H9 broth, or solid 7H11P. The proportion of isolates of M. bovis and the mean time for their isolation with MGIT was different for the North Canterbury/Marlborough and the rest of New Zealand. The reason for this difference was not determined but may be related to the genotypes present in this region. Genotyping using variable number tandem repeats (VNTRs) of 197 isolates of M. bovis revealed that the 44 isolates from North Canterbury/Marlborough were represented by 2 closely related VNTR types that were not found in 153 isolates from the remainder of New Zealand.
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Affiliation(s)
- Gary F Yates
- AgResearch Limited, Hopkirk Research Institute, Grasslands Research Centre, Palmerston North, New Zealand
| | - Marian Price-Carter
- AgResearch Limited, Hopkirk Research Institute, Grasslands Research Centre, Palmerston North, New Zealand
| | - Kirstie Bland
- AgResearch Limited, Hopkirk Research Institute, Grasslands Research Centre, Palmerston North, New Zealand
| | - Maree A Joyce
- AgResearch Limited, Hopkirk Research Institute, Grasslands Research Centre, Palmerston North, New Zealand
| | - Farina Khan
- AgResearch Limited, Hopkirk Research Institute, Grasslands Research Centre, Palmerston North, New Zealand
| | - Melissa Surrey
- AgResearch Limited, Hopkirk Research Institute, Grasslands Research Centre, Palmerston North, New Zealand
| | - Geoffrey W de Lisle
- AgResearch Limited, Hopkirk Research Institute, Grasslands Research Centre, Palmerston North, New Zealand
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30
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Cheng G, Xu D, Wang J, Liu C, Zhou Y, Cui Y, Liu H, Wan K, Zhou X. Isolation and identification of multiple drug resistant nontuberculous mycobacteria from organs of cattle produced typical granuloma lesions. Microb Pathog 2017; 107:313-316. [PMID: 28392413 DOI: 10.1016/j.micpath.2017.03.047] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Revised: 02/23/2017] [Accepted: 03/30/2017] [Indexed: 11/19/2022]
Abstract
Nontuberculosis mycobacteria are widespread in the environment and some are zoonotic. 320 tissue samples with visible lesions were obtained from dairy cows and examined by histopathology. Eleven samples showed typical granulomatous lesions and a total of 8 strains were cultured. Three genes (16S rRNA, hsp65 and rpoB) were sequenced for species identification. All mycobacterial isolates were tested for rifampicin, isoniazid, ethambutol, streptomycin, capreomycin, kanamycin, para-aminosalicylic acid susceptibility. Six strains were identified as M. fortuitum, 1 was M. avium, 1 was M. conceptionense, isolated from cattle for the first time. Seven of the 8 isolated strains showed multiple drug resistance.
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Affiliation(s)
- Guangyu Cheng
- National Animal Transmissible Spongiform Encephalopathy Laboratory, Key Laboratory of Animal Epidemiology and Zoonosis of Ministry of Agriculture, College of Veterinary Medicine and State Key Lab of Agrobiotechnology, China Agricultural University, 100193 Beijing, China.
| | - Donglei Xu
- National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, National Tuberculosis Reference Laboratory, Changping, 100193 Beijing, China.
| | - Jinling Wang
- College of Veterinary Medicine, Inner Mongolia Agricultural University, 010018 Huhhot, China.
| | - Chunfa Liu
- National Animal Transmissible Spongiform Encephalopathy Laboratory, Key Laboratory of Animal Epidemiology and Zoonosis of Ministry of Agriculture, College of Veterinary Medicine and State Key Lab of Agrobiotechnology, China Agricultural University, 100193 Beijing, China.
| | - Yang Zhou
- National Animal Transmissible Spongiform Encephalopathy Laboratory, Key Laboratory of Animal Epidemiology and Zoonosis of Ministry of Agriculture, College of Veterinary Medicine and State Key Lab of Agrobiotechnology, China Agricultural University, 100193 Beijing, China.
| | - Yongyong Cui
- National Animal Transmissible Spongiform Encephalopathy Laboratory, Key Laboratory of Animal Epidemiology and Zoonosis of Ministry of Agriculture, College of Veterinary Medicine and State Key Lab of Agrobiotechnology, China Agricultural University, 100193 Beijing, China.
| | - Hancan Liu
- National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, National Tuberculosis Reference Laboratory, Changping, 100193 Beijing, China.
| | - Kanglin Wan
- National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, National Tuberculosis Reference Laboratory, Changping, 100193 Beijing, China.
| | - Xiangmei Zhou
- National Animal Transmissible Spongiform Encephalopathy Laboratory, Key Laboratory of Animal Epidemiology and Zoonosis of Ministry of Agriculture, College of Veterinary Medicine and State Key Lab of Agrobiotechnology, China Agricultural University, 100193 Beijing, China.
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31
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Cvetkovikj I, Mrenoshki S, Krstevski K, Djadjovski I, Angjelovski B, Popova Z, Janevski A, Dodovski A, Cvetkovikj A. Bovine Tuberculosis in the Republic of Macedonia: Postmortem, Microbiological and Molecular Study in Slaughtered Reactor Cattle. MACEDONIAN VETERINARY REVIEW 2017. [DOI: 10.1515/macvetrev-2016-0097] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Bovine tuberculosis is a chronic infectious disease in cattle caused mainly by Mycobacterium bovis and to a lesser extent by Mycobacterium caprae. The other members of the Mycobacterium tuberculosis complex (MTBC) can also cause the disease in domestic and wild animals and all of them have a zoonotic potential. The main purpose of the study was to determine the presence and distribution of the tuberculous lesions in reactor cattle, and to isolate and identify the causative agents of bovine tuberculosis in the Republic of Macedonia. Lymph nodes and affected organs from 188 reactor cattle slaughtered due to a positive intradermal comparative cervical tuberculin test were analyzed by detection of tuberculous lesions, followed by isolation and molecular identification of the isolated mycobacteria. The isolation was performed on selective media - Lowenstein Jensen with glycerol, Lowenstein Jensen without glycerol and Stonebrink medium supplemented with pyruvate. The molecular identification of the MTBC members was performed by analysis of the Regions of difference (RD1, RD9 and RD4) and detection of single nucleotide polymorphisms in the lepA gene for Mycobacterium caprae. Typical tuberculous lesions were detected in 62 animals (33.0%) and the lesions were most prevalent in the mediastinal lymph nodes (47.5%). The isolated mycobacteria in the MTBC were identified as Mycobacterium bovis and Mycobacterium caprae and were found in both animals with visible lesions (82.2%) and animals without visible lesions (27.7%). The slaughterhouse postmortem examinations and laboratory investigations should be included on regular bases in order to improve the National eradication program.
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Affiliation(s)
- Iskra Cvetkovikj
- Veterinary Institute, Faculty of Veterinary Medicine , Ss. Cyril and Methodius University in Skopje , Lazar Pop Trajkov 5-7, 1000 Skopje , Macedonia (the former Yugoslav Republic of)
| | - Slavcho Mrenoshki
- Veterinary Institute, Faculty of Veterinary Medicine , Ss. Cyril and Methodius University in Skopje , Lazar Pop Trajkov 5-7, 1000 Skopje , Macedonia (the former Yugoslav Republic of)
| | - Kiril Krstevski
- Veterinary Institute, Faculty of Veterinary Medicine , Ss. Cyril and Methodius University in Skopje , Lazar Pop Trajkov 5-7, 1000 Skopje , Macedonia (the former Yugoslav Republic of)
| | - Igor Djadjovski
- Veterinary Institute, Faculty of Veterinary Medicine , Ss. Cyril and Methodius University in Skopje , Lazar Pop Trajkov 5-7, 1000 Skopje , Macedonia (the former Yugoslav Republic of)
| | - Branko Angjelovski
- Veterinary Institute, Faculty of Veterinary Medicine , Ss. Cyril and Methodius University in Skopje , Lazar Pop Trajkov 5-7, 1000 Skopje , Macedonia (the former Yugoslav Republic of)
| | - Zagorka Popova
- Veterinary Institute, Faculty of Veterinary Medicine , Ss. Cyril and Methodius University in Skopje , Lazar Pop Trajkov 5-7, 1000 Skopje , Macedonia (the former Yugoslav Republic of)
| | - Aleksandar Janevski
- Veterinary Institute, Faculty of Veterinary Medicine , Ss. Cyril and Methodius University in Skopje , Lazar Pop Trajkov 5-7, 1000 Skopje , Macedonia (the former Yugoslav Republic of)
| | - Aleksandar Dodovski
- Veterinary Institute, Faculty of Veterinary Medicine , Ss. Cyril and Methodius University in Skopje , Lazar Pop Trajkov 5-7, 1000 Skopje , Macedonia (the former Yugoslav Republic of)
| | - Aleksandar Cvetkovikj
- Veterinary Institute, Faculty of Veterinary Medicine , Ss. Cyril and Methodius University in Skopje , Lazar Pop Trajkov 5-7, 1000 Skopje , Macedonia (the former Yugoslav Republic of)
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32
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de Azevedo Issa M, Martins Soares Filho P, Fonseca Júnior AA, Arrais Hodon M, Cristian Dos Santos L, Karlisson Pimenta Dos Reis J, Cerqueira Leite R. Comparative study of Mycobacterium bovis primary isolation methods. Braz J Microbiol 2016; 48:139-144. [PMID: 27818094 PMCID: PMC5220631 DOI: 10.1016/j.bjm.2016.07.026] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Accepted: 07/31/2016] [Indexed: 12/01/2022] Open
Abstract
For the definitive diagnosis of bovine tuberculosis, isolation of the etiologic agent is required. However, there is no consensus on the best methodology for isolation of Mycobacterium bovis in Brazil. This study evaluated the most used decontaminants and culture media in the country, in order to identify the best combination for the Brazilian samples. Three decontaminants – 2% sodium hydroxide (w/v), 0.75% hexadecylpiridinium chloride (w/v) and 5% sulphuric acid (v/v) and four culture media – 7H11 Middlebrook with additives and OADC supplement “A” (7H11 A), the same media with another supplement trademark (7H11 B), tuberculosis blood agar (B83) and Stonebrink's medium were compared. Regarding the isolation, there were no significant differences between the decontaminants and media combinations, except 7H11A combined to any decontaminant. However, the mean colonies score was significantly greater when the samples were decontaminated with 5% sulphuric acid and inoculated in 7H11 B or SB, without significant difference between them, although colonies appeared earlier on 7H11B than on SB. The trademark of OADC supplement influenced the isolation rate and the number of isolated colonies in Middlebrook 7H11. An incubation time of four weeks was required to detect all positive samples in 7H11 B after decontamination with 5% sulphuric acid but there was an increase in the number of colonies until the sixth week of incubation. Overall, the best strategy for the primary isolation of M. bovis from Brazilian samples was the decontamination with 5% sulphuric acid (final concentration) and inoculation in Middlebrook 7H11 medium formulated with OADC supplement “B”.
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Affiliation(s)
| | | | | | - Mikael Arrais Hodon
- Laboratório Nacional Agropecuário de Minas Gerais, Pedro Leopoldo, MG, Brazil
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33
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Swift BMC, Convery TW, Rees CED. Evidence of Mycobacterium tuberculosis complex bacteraemia in intradermal skin test positive cattle detected using phage-RPA. Virulence 2016; 7:779-88. [PMID: 27197018 DOI: 10.1080/21505594.2016.1191729] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Abstract
Bovine tuberculosis is a zoonotic infectious disease caused by Mycobacterium bovis that affects cattle and can cause tuberculosis in a range of wildlife animals. A bacteriophage-based method combined with PCR (phage-PCR) has been recently used to detect and identify viable pathogenic mycobacteria in the peripheral blood mononuclear cells (PBMCs) of animals suffering from paratuberculosis. To adapt this method for the detection of M. bovis in blood, a new isothermal DNA amplification protocol using Recombinase Polymerase Amplification (RPA) was developed and was found to be able to detect M. bovis BCG within 48 h, with a limit of detection of approximately 10 cells per ml of blood for artificially inoculated blood samples. When blood samples (2 ml) from a Single Comparative Cervical Intradermal Tuberculin (SCCIT)- negative beef herd were tested, Mycobacterium tuberculosis complex (MTC) cells were not detected from any (45) of the blood samples. However when blood samples from SCCIT-positive animals were tested, viable MTC bacteria were detected in 66 % (27/41) of samples. Of these 41 animals sampled, 32 % (13) had visible lesions. In the visible lesion (VL) group, 85 % (11/13) had detectable levels of MTC whereas only 57 % (16/28) of animals which had no visible lesions (NVL) were found to have detectable mycobacteraemia. These results indicated that this simple, rapid method can be applied for the study of M. bovis infections. The frequency with which viable mycobacteria were detected in the peripheral blood of SCCIT-positive animals changes the paradigm of this disease.
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Affiliation(s)
- Benjamin M C Swift
- a School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington Campus , Nr Loughbotough, Leics , UK
| | - Thomas W Convery
- b School of Biosciences, University of Nottingham, Sutton Bonington Campus , Nr Loughbotough, Leics , UK
| | - Catherine E D Rees
- b School of Biosciences, University of Nottingham, Sutton Bonington Campus , Nr Loughbotough, Leics , UK
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34
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Byrne A, Kenny K, Fogarty U, O’Keeffe J, More S, McGrath G, Teeling M, Martin S, Dohoo I. Spatial and temporal analyses of metrics of tuberculosis infection in badgers ( Meles meles ) from the Republic of Ireland: Trends in apparent prevalence. Prev Vet Med 2015; 122:345-54. [DOI: 10.1016/j.prevetmed.2015.10.013] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2015] [Revised: 10/18/2015] [Accepted: 10/22/2015] [Indexed: 11/16/2022]
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35
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Cazola DDO, Jorge KDS, Zumárraga MJ, Souza-Filho AF, Araújo FR, Osório ALA. Identificação e genotipagem de Mycobacterium bovis em bovinos positivos no teste intradérmico para tuberculose em Mato Grosso do Sul. PESQUISA VETERINÁRIA BRASILEIRA 2015. [DOI: 10.1590/s0100-736x2015000200008] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Neste estudo, realizou-se genotipagem de isolados de Mycobacterium bovis, provenientes de amostras de tecidos de bovinos positivos no teste cervical comparativo (TCC) para tuberculose em Mato Grosso do Sul, por meio da técnica de spoligotyping. Tecidos de 13 bovinos positivos, oriundos de diferentes municípios do estado, foram cultivados em meio de Stonebrink. As colônias resultantes foram submetidas à coloração de Ziehl-Neelsen e todos os isolados apresentaram características tintoriais de BAAR. Os 13 isolados de BAAR foram identificados por PCR multiplex (mPCR). O gene hsp65 foi alvo para identificação de Mycobacterium spp, a sequência de inserção IS6110 foi alvo para identificação de complexo Mycobacterium tuberculosis (CMT) e a região rvd1rv2031c foi explorada para detecção de M. bovis. Os isolados micobacterianos foram genotipados pela técnica de spoligotyping. Dos 13 bovinos, sete tinham pelo menos uma lesão sugestiva de tuberculose em linfonodos retrofaríngeos, parotídeos e pulmonares ou no pulmão, e em seis não foram encontradas lesões visíveis sugestivas da doença. Na mPCR, 11/13 (84,6%) isolados foram positivos para Mycobacterium spp; 8/13 (61,5%) positivos para CMT e 7/13 (53,8%) positivos para M. bovis. Com base no spoligotyping, oito isolados de BAAR foram agrupados dentro de três diferentes agrupamentos de genótipos e uma amostra remanescente apresentou perfil único, sendo quatro isolados com padrão de espoligotipo SB0121, dois SB1145, dois SB0881 e um SB0140. A técnica de spoligotyping demonstrou que há diversidade genética entre os espoligotipos presentes no estado de Mato Grosso do Sul, embora predomine o perfil SB0121
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36
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Cardoso-Toset F, Luque I, Amarilla SP, Gómez-Gascón L, Fernández L, Huerta B, Carrasco L, Ruiz P, Gómez-Laguna J. Evaluation of rapid methods for diagnosis of tuberculosis in slaughtered free-range pigs. Vet J 2015; 204:232-4. [PMID: 25920761 DOI: 10.1016/j.tvjl.2015.01.022] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Revised: 01/13/2015] [Accepted: 01/24/2015] [Indexed: 11/28/2022]
Abstract
Free-range pigs can be infected by Mycobacterium tuberculosis complex (MTC) and may contribute to the spread of bovine tuberculosis (bTB). In the present study, the diagnostic values of bacteriological culture, a duplex real-time quantitative PCR and an antibody ELISA were evaluated in an abattoir study of submandibular lymph nodes and serum samples from 73 pigs with and without lesions consistent with bTB. The duplex qPCR was an accurate method for diagnosis of TB in pigs (specificity 100%; sensitivity 80%). Combining qPCR with histopathology improved sensitivity and had very good concordance (κ = 0.94) with the reference method. Serological results suggest that the antibody ELISA can be used for monitoring herds but not individuals.
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Affiliation(s)
- Fernando Cardoso-Toset
- Department of Animal Health, University of Córdoba, International Excellence Agrifood Campus 'CeiA3', University Campus of Rabanales, Córdoba 14071, Spain; CICAP - Food Research Centre, Pozoblanco 14400, Córdoba, Spain.
| | - Inmaculada Luque
- Department of Animal Health, University of Córdoba, International Excellence Agrifood Campus 'CeiA3', University Campus of Rabanales, Córdoba 14071, Spain
| | - Shyrley Paola Amarilla
- Department of Anatomy and Comparative Pathology, University of Córdoba, International Excellence Agrifood Campus 'CeiA3', University Campus of Rabanales, Córdoba 14071, Spain
| | - Lidia Gómez-Gascón
- Department of Animal Health, University of Córdoba, International Excellence Agrifood Campus 'CeiA3', University Campus of Rabanales, Córdoba 14071, Spain
| | - Layla Fernández
- CICAP - Food Research Centre, Pozoblanco 14400, Córdoba, Spain
| | - Belén Huerta
- Department of Animal Health, University of Córdoba, International Excellence Agrifood Campus 'CeiA3', University Campus of Rabanales, Córdoba 14071, Spain
| | - Librado Carrasco
- Department of Anatomy and Comparative Pathology, University of Córdoba, International Excellence Agrifood Campus 'CeiA3', University Campus of Rabanales, Córdoba 14071, Spain
| | - Pilar Ruiz
- Microbiology Service, Reina Sofia University Hospital, Mycobacteria Reference Center, Avd. Méndez Pidal s/n, Córdoba 14004, Spain
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37
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Costa P, Botelho A, Couto I, Viveiros M, Inácio J. Standing of nucleic acid testing strategies in veterinary diagnosis laboratories to uncover Mycobacterium tuberculosis complex members. Front Mol Biosci 2014; 1:16. [PMID: 25988157 PMCID: PMC4428369 DOI: 10.3389/fmolb.2014.00016] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Accepted: 09/25/2014] [Indexed: 12/03/2022] Open
Abstract
Nucleic acid testing (NAT) designate any molecular approach used for the detection, identification, and characterization of pathogenic microorganisms, enabling the rapid, specific, and sensitive diagnostic of infectious diseases, such as tuberculosis. These assays have been widely used since the 90s of the last century in human clinical laboratories and, subsequently, also in veterinary diagnostics. Most NAT strategies are based in the polymerase chain reaction (PCR) and its several enhancements and variations. From the conventional PCR, real-time PCR and its combinations, isothermal DNA amplification, to the nanotechnologies, here we review how the NAT assays have been applied to decipher if and which member of the Mycobacterium tuberculosis complex is present in a clinical sample. Recent advances in DNA sequencing also brought new challenges and have made possible to generate rapidly and at a low cost, large amounts of sequence data. This revolution with the high-throughput sequencing (HTS) technologies makes whole genome sequencing (WGS) and metagenomics the trendiest NAT strategies, today. The ranking of NAT techniques in the field of clinical diagnostics is rising, and we provide a SWOT (Strengths, Weaknesses, Opportunities, and Threats) analysis with our view of the use of molecular diagnostics for detecting tuberculosis in veterinary laboratories, notwithstanding the gold standard being still the classical culture of the agent. The complementary use of both classical and molecular diagnostics approaches is recommended to speed the diagnostic, enabling a fast decision by competent authorities and rapid tackling of the disease.
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Affiliation(s)
- Pedro Costa
- Instituto Nacional de Investigação Agrária e Veterinária IPLisboa, Portugal
- Grupo de Micobactérias, Unidade de Microbiologia Médica, Instituto de Higiene e Medicina Tropical da Universidade Nova de LisboaLisboa, Portugal
| | - Ana Botelho
- Instituto Nacional de Investigação Agrária e Veterinária IPLisboa, Portugal
| | - Isabel Couto
- Grupo de Micobactérias, Unidade de Microbiologia Médica, Instituto de Higiene e Medicina Tropical da Universidade Nova de LisboaLisboa, Portugal
- Centro de Recursos Microbiológicos (CREM), Universidade Nova de LisboaCaparica, Portugal
| | - Miguel Viveiros
- Grupo de Micobactérias, Unidade de Microbiologia Médica, Instituto de Higiene e Medicina Tropical da Universidade Nova de LisboaLisboa, Portugal
- Centro de Malária e Outras Doenças Tropicais, Instituto de Higiene e Medicina Tropical da Universidade Nova de LisboaLisboa, Portugal
| | - João Inácio
- School of Pharmacy and Biomolecular Sciences, University of BrightonBrighton, UK
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Bacteriological diagnosis and molecular strain typing of Mycobacterium bovis and Mycobacterium caprae. Res Vet Sci 2014; 97 Suppl:S30-43. [DOI: 10.1016/j.rvsc.2014.04.010] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2013] [Revised: 04/08/2014] [Accepted: 04/24/2014] [Indexed: 11/24/2022]
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Neeraja D, Veeregowda B, Rani MS, Rathnamma D, Narayanasw H, Venkatesha M, Leena G, Apsana R, Somshekhar S, Saminathan M, Dhama K, Chakrabort S. Identification of Mycobacterium tuberculosis Complex by Culture and Duplex Polymerase Chain Reaction in Bovines. ACTA ACUST UNITED AC 2014. [DOI: 10.3923/ajava.2014.506.512] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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40
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Forgrave R, Donaghy J, Fisher A, Rowe M. Optimization of modified Middlebrook 7H11 agar for isolation of Mycobacterium bovis
from raw milk cheese. Lett Appl Microbiol 2014; 59:384-90. [DOI: 10.1111/lam.12290] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2014] [Revised: 05/23/2014] [Accepted: 05/26/2014] [Indexed: 11/28/2022]
Affiliation(s)
- R. Forgrave
- Department of Food Microbiology; Queen's University Belfast; Belfast Northern Ireland
- Food Science Branch; Agri-Food and Biosciences Institute; Belfast Northern Ireland
| | - J.A. Donaghy
- Food Science Branch; Agri-Food and Biosciences Institute; Belfast Northern Ireland
| | - A. Fisher
- Food Science Branch; Agri-Food and Biosciences Institute; Belfast Northern Ireland
| | - M.T. Rowe
- Department of Food Microbiology; Queen's University Belfast; Belfast Northern Ireland
- Food Science Branch; Agri-Food and Biosciences Institute; Belfast Northern Ireland
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41
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Characterization of Mycobacterium bovis from Humans and Cattle in Namwala District, Zambia. Vet Med Int 2014; 2014:187842. [PMID: 24847441 PMCID: PMC4009325 DOI: 10.1155/2014/187842] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2013] [Accepted: 03/18/2014] [Indexed: 11/28/2022] Open
Abstract
Tuberculosis remains a major public health problem in Zambia. While human to human transmission of Mycobacterium tuberculosis is of major importance in driving the tuberculosis epidemic, the impact of Mycobacterium bovis transmission from infected cattle is largely unknown. This cross-sectional study aimed at molecular characterization of M. bovis in humans and cattle. A total of 100 human sputum samples and 67 bovine tissues were collected and analyzed for the presence of mycobacteria. Of 65 human samples that harbored acid fast bacteria (AFB), 55 isolates were obtained of which 34 were identified as M. tuberculosis and 2 as M. bovis. AFB-positive bovine samples (n = 67) yielded 47 mycobacterial isolates among which 25 were identified as M. bovis and no M. tuberculosis was found. Among the M. bovis isolates, spoligotyping revealed a high homogeneity in genotypes circulating in Namwala district. Human and cattle isolates shared identical MIRU-VNTR genotypes, suggesting that transmission between the two hosts may occur. Therefore, this study has documented zoonotic TB in human patients in Namwala district of Zambia. However, further molecular epidemiological studies in the study area are recommended.
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Courcoul A, Moyen JL, Brugère L, Faye S, Hénault S, Gares H, Boschiroli ML. Estimation of sensitivity and specificity of bacteriology, histopathology and PCR for the confirmatory diagnosis of bovine tuberculosis using latent class analysis. PLoS One 2014; 9:e90334. [PMID: 24625670 PMCID: PMC3953111 DOI: 10.1371/journal.pone.0090334] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Accepted: 01/31/2014] [Indexed: 11/18/2022] Open
Abstract
Bacteriology and histopathology are the most commonly used tests used for official confirmatory diagnosis of bovine tuberculosis (bTB) in cattle in most countries. PCR is also being used increasingly because it allows a fast diagnosis. This test could be applied as a supplement to or replacement for current bTB confirmatory diagnostic tests but its characteristics have first to be evaluated. The aim of this study was to estimate and compare sensitivities and specificities of bacteriology, histopathology and PCR under French field conditions, in the absence of a gold standard using latent class analysis. The studied population consisted of 5,211 animals from which samples were subjected to bacteriology and PCR (LSI VetMAX™ Mycobacterium tuberculosis Complex PCR Kit, Life Technologies) as their herd of origin was either suspected or confirmed infected with bTB or because bTB-like lesions were detected during slaughterhouse inspection. Samples from 697 of these animals (all with bTB-like lesions) were subjected to histopathology. Bayesian models were developed, allowing for dependence between bacteriology and PCR, while assuming independence from histopathology. The sensitivity of PCR was higher than that of bacteriology (on average 87.7% [82.5–92.3%] versus 78.1% [72.9–82.8%]) while specificity of both tests was very good (on average 97.0% for PCR [94.3–99.0%] and 99.1% for bacteriology [97.1–100.0%]). Histopathology was at least as sensitive as PCR (on average 93.6% [89.9–96.9%]) but less specific than the two other tests (on average 83.3% [78.7–87.6%]). These results suggest that PCR has the potential to replace bacteriology to confirm bTB in samples submitted from suspect cattle.
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Affiliation(s)
- Aurélie Courcoul
- Epidemiology Unit, Paris-Est University, Anses, Laboratory for Animal Health, Maisons-Alfort, France
| | - Jean-Louis Moyen
- Regional Analysis and Research Laboratory of Dordogne (LDAR24), Coulounieix-Chamiers, France
| | - Laure Brugère
- Regional Analysis and Research Laboratory of Dordogne (LDAR24), Coulounieix-Chamiers, France
| | - Sandy Faye
- Regional Analysis and Research Laboratory of Dordogne (LDAR24), Coulounieix-Chamiers, France
| | - Sylvie Hénault
- Bovine Tuberculosis Reference Laboratory, Paris-Est University, Anses, Laboratory for Animal Health, Bacterial Zoonoses Unit, Maisons-Alfort, France
| | - Hélène Gares
- Regional Analysis and Research Laboratory of Dordogne (LDAR24), Coulounieix-Chamiers, France
| | - Maria-Laura Boschiroli
- Bovine Tuberculosis Reference Laboratory, Paris-Est University, Anses, Laboratory for Animal Health, Bacterial Zoonoses Unit, Maisons-Alfort, France
- * E-mail:
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43
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Costa P, Ferreira AS, Amaro A, Albuquerque T, Botelho A, Couto I, Cunha MV, Viveiros M, Inácio J. Enhanced detection of tuberculous mycobacteria in animal tissues using a semi-nested probe-based real-time PCR. PLoS One 2013; 8:e81337. [PMID: 24278425 PMCID: PMC3836791 DOI: 10.1371/journal.pone.0081337] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2013] [Accepted: 10/11/2013] [Indexed: 11/22/2022] Open
Abstract
Bovine tuberculosis has been tackled for decades by costly eradication programs in most developed countries, involving the laboratory testing of tissue samples from allegedly infected animals for detection of Mycobacterium tuberculosis complex (MTC) members, namely Mycobacterium bovis. Definitive diagnosis is usually achieved by bacteriological culture, which may take up to 6–12 weeks, during which the suspect animal carcass and herd are under sanitary arrest. In this work, a user-friendly DNA extraction protocol adapted for tissues was coupled with an IS6110-targeted semi-nested duplex real-time PCR assay to enhance the direct detection of MTC bacteria in animal specimens, reducing the time to achieve a diagnosis and, thus, potentially limiting the herd restriction period. The duplex use of a novel β-actin gene targeted probe, with complementary targets in most mammals, allowed the assessment of amplification inhibitors in the tissue samples. The assay was evaluated with a group of 128 fresh tissue specimens collected from bovines, wild boars, deer and foxes. Mycobacterium bovis was cultured from 57 of these samples. Overall, the full test performance corresponds to a diagnostic sensitivity and specificity of 98.2% (CIP95% 89.4–99.9%) and 88.7% (CIP95% 78.5–94.7%), respectively. An observed kappa coefficient was estimated in 0.859 (CIP95% 0.771–0.948) for the overall agreement between the semi-nested PCR assay and the bacteriological culture. Considering only bovine samples (n = 69), the diagnostic sensitivity and specificity were estimated in 100% (CIP95% 84.0–100%) and 97.7% (CIP95% 86.2–99.9%), respectively. Eight negative culture samples exhibiting TB-like lesions were detected by the semi-nested real-time PCR, thus emphasizing the increased potential of this molecular approach to detect MTC-infected animal tissues. This novel IS6110-targeted assay allows the fast detection of tuberculous mycobacteria in animal specimens with very high sensitivity and specificity, being amenable and cost effective for use in the routine veterinary diagnostic laboratory with further automation possibilities.
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Affiliation(s)
- Pedro Costa
- Unidade Estratégica de Investigação e Serviços em Produção e Saúde Animal, Instituto Nacional de Investigação Agrária e Veterinária, I.P., (INIAV, I.P.), Lisboa, Portugal
- Grupo de Micobactérias, Unidade de Ensino e Investigação de Microbiologia Médica, Instituto de Higiene e Medicina Tropical, Universidade Nova de Lisboa, Lisboa, Portugal
| | - Ana S. Ferreira
- Unidade Estratégica de Investigação e Serviços em Produção e Saúde Animal, Instituto Nacional de Investigação Agrária e Veterinária, I.P., (INIAV, I.P.), Lisboa, Portugal
- Instituto de Ciências Biomédicas de Abel Salazar, Universidade do Porto, Porto, Portugal
| | - Ana Amaro
- Unidade Estratégica de Investigação e Serviços em Produção e Saúde Animal, Instituto Nacional de Investigação Agrária e Veterinária, I.P., (INIAV, I.P.), Lisboa, Portugal
| | - Teresa Albuquerque
- Unidade Estratégica de Investigação e Serviços em Produção e Saúde Animal, Instituto Nacional de Investigação Agrária e Veterinária, I.P., (INIAV, I.P.), Lisboa, Portugal
| | - Ana Botelho
- Unidade Estratégica de Investigação e Serviços em Produção e Saúde Animal, Instituto Nacional de Investigação Agrária e Veterinária, I.P., (INIAV, I.P.), Lisboa, Portugal
| | - Isabel Couto
- Grupo de Micobactérias, Unidade de Ensino e Investigação de Microbiologia Médica, Instituto de Higiene e Medicina Tropical, Universidade Nova de Lisboa, Lisboa, Portugal
- Centro de Recursos Microbiológicos (CREM), Universidade Nova de Lisboa, Lisboa, Portugal
| | - Mónica V. Cunha
- Unidade Estratégica de Investigação e Serviços em Produção e Saúde Animal, Instituto Nacional de Investigação Agrária e Veterinária, I.P., (INIAV, I.P.), Lisboa, Portugal
| | - Miguel Viveiros
- Grupo de Micobactérias, Unidade de Ensino e Investigação de Microbiologia Médica, Instituto de Higiene e Medicina Tropical, Universidade Nova de Lisboa, Lisboa, Portugal
- Centro de Malária e Outras Doenças Tropicais, Instituto de Higiene e Medicina Tropical, Universidade Nova de Lisboa, Lisboa, Portugal
| | - João Inácio
- Unidade Estratégica de Investigação e Serviços em Produção e Saúde Animal, Instituto Nacional de Investigação Agrária e Veterinária, I.P., (INIAV, I.P.), Lisboa, Portugal
- * E-mail:
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Jones RM, Ashford R, Cork J, Palmer S, Wood E, Spyvee P, Parks S, Bennett A, Brewer J, Delahay R, Chambers M, Sawyer J. Evaluation of a method to detect Mycobacterium bovis in air samples from infected Eurasian badgers (Meles meles) and their setts. Lett Appl Microbiol 2013; 56:361-5. [PMID: 23384280 DOI: 10.1111/lam.12055] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2012] [Revised: 01/24/2013] [Accepted: 01/31/2013] [Indexed: 11/29/2022]
Abstract
Environmental air sampling was evaluated as a method to detect the presence of M. bovis in the vicinity of infected badgers and their setts. Airborne particles were collected on gelatine filters using a commercially available air sampling instrument and tested for the presence of M. bovis using bacteriological culture and real-time PCR. The sensitivity of bacteriological culture was broadly similar to that of real-time PCR when testing samples artificially spiked with M. bovis. Sampling was undertaken from directly under the muzzles of badgers which had been experimentally infected with M. bovis (37 samples), within enclosures housing the experimentally infected animals (50 samples), and in the vicinity of setts with resident infected wild badgers (52 samples). The methods employed did not detect M. bovis from either infected badgers or artificial or natural setts known to contain infected animals. However, samples taken at four of the six natural setts were positive for Mycobacterium gordonae.
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Affiliation(s)
- R M Jones
- Animal Health and Veterinary Laboratories Agency Weybridge, Addlestone, UK
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Zerom K, Tessema TS, Mamo G, Bayu Y, Ameni G. Tuberculosis in dromedaries in eastern Ethiopia: Abattoir-based prevalence and molecular typing of its causative agents. Small Rumin Res 2013. [DOI: 10.1016/j.smallrumres.2012.07.030] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Epidemiological significance of the domestic black pig (Sus scrofa) in maintenance of bovine tuberculosis in Sicily. J Clin Microbiol 2012; 50:1209-18. [PMID: 22322347 DOI: 10.1128/jcm.06544-11] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Bovine tuberculosis (bTB) is an emerging disease among wild animals in many parts of the world. Wildlife reservoir hosts may thus represent a potential source of infection for livestock and humans. We investigated the role played by the Sicilian black pig, an autochthonous free- or semi-free-ranging domestic pig breed, as a potential source of bTB infection in an area where bTB prevalence in cattle is high. We initially performed a preliminary field study to assess the occurrence of bTB in such animals. We sampled 119 pigs at abattoir and found 6.7% and 3.4% of them to be affected by gross tuberculous-like lesions (TBL) and Mycobacterium bovis culture positive, respectively. We then proceeded to investigate the dissemination and characteristics of lesions in a second field study performed on 100 animals sampled from infected herds. Here, tissues collected at the abattoir were examined macroscopically, microscopically, and by culture tests. Most pigs with TBL showed generalized lesions in both gross and histological examinations (53% and 65.5%, respectively). Head lymph nodes were the most frequently affected in both localized and generalized TB cases observed macroscopically and microscopically. M. bovis was the most frequently isolated etiologic agent. The molecular characterization of isolates from both field studies by spoligotyping and analysis of 12 mycobacterial interspersed repetitive-unit-variable number tandem repeat (MIRU-VNTR) loci, followed by their comparison to isolates of cattle origin, suggested a potential transmission of mycobacteria from domestic animals to black pigs and vice versa. Our findings, along with ethological, ecological, and management considerations, suggest that the black pig might act as a bTB reservoir in the ecosystem under study. However, additional studies will be necessary to establish the true epidemiological significance of the Sicilian black pig.
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