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Agrawal G, Borody TJ, Aitken JM. Mapping Crohn's Disease Pathogenesis with Mycobacterium paratuberculosis: A Hijacking by a Stealth Pathogen. Dig Dis Sci 2024:10.1007/s10620-024-08508-4. [PMID: 38896362 DOI: 10.1007/s10620-024-08508-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Accepted: 05/21/2024] [Indexed: 06/21/2024]
Abstract
Mycobacterium avium ssp. paratuberculosis (MAP) has been implicated in the development of Crohn's disease (CD) for over a century. Similarities have been noted between the (histo)pathological presentation of MAP in ruminants, termed Johne's disease (JD), and appearances in humans with CD. Analyses of disease presentation and pathology suggest a multi-step process occurs that consists of MAP infection, dysbiosis of the gut microbiome, and dietary influences. Each step has a role in the disease development and requires a better understanding to implementing combination therapies, such as antibiotics, vaccination, faecal microbiota transplants (FMT) and dietary plans. To optimise responses, each must be tailored directly to the activity of MAP, otherwise therapies are open to interpretation without microbiological evidence that the organism is present and has been influenced. Microscopy and histopathology enables studies of the mycobacterium in situ and how the associated disease processes manifest in the patient e.g., granulomas, fissuring, etc. The challenge for researchers has been to prove the relationship between MAP and CD with available laboratory tests and methodologies, such as polymerase chain reaction (PCR), MAP-associated DNA sequences and bacteriological culture investigations. These have, so far, been inconclusive in revealing the relationship of MAP in patients with CD. Improved and accurate methods of detection will add to evidence for an infectious aetiology of CD. Specifically, if the bacterial pathogen can be isolated, identified and cultivated, then causal relationships to disease can be confirmed, especially if it is present in human gut tissue. This review discusses how MAP may cause the inflammation seen in CD by relating its known pathogenesis in cattle, and from examples of other mycobacterial infections in humans, and how this would impact upon the difficulties with diagnostic tests for the organism.
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Affiliation(s)
- Gaurav Agrawal
- Division of Diabetes & Nutritional Sciences, King's College London, Franklin-Wilkins Building, London, SE1 9NH, UK.
- , Sydney, Australia.
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Barker EN, O'Halloran C, Gunn-Moore DA. Review canine tuberculosis - An emerging concern. Vet J 2024; 305:106111. [PMID: 38604331 DOI: 10.1016/j.tvjl.2024.106111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 03/21/2024] [Accepted: 04/08/2024] [Indexed: 04/13/2024]
Abstract
Canine mycobacterial disease was first recognised over 100 years ago but is now an emerging concern. All reported cases of tuberculous disease in dogs have been caused by infection with one of three Mycobacterium tuberculosis-complex (MTBC) organisms (M. tuberculosis, Mycobacterium bovis, and Mycobacterium microti). Molecular PCR and interferon-gamma release assays offer alternative or complementary diagnostic pathways to that of specialist culture, which is limited by availability, sensitivity, and the time it takes to get a result. Optimised triple antimicrobial protocols offer an excellent chance of a successful outcome in dogs where treatment can be considered and is attempted. In this review, the clinical presentation, diagnosis, treatment, and prognosis of canine tuberculosis are discussed.
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Affiliation(s)
- Emi N Barker
- Langford Vets, University of Bristol, Langford BS40 5DU, United Kingdom; Bristol Veterinary School, University of Bristol, Langford BS40 5DU, United Kingdom.
| | - Conor O'Halloran
- Royal (Dick) School of Veterinary Studies and The Roslin Institute, University of Edinburgh, Easter Bush Campus, Midlothian EH25 9RG, United Kingdom
| | - Danièlle A Gunn-Moore
- Royal (Dick) School of Veterinary Studies and The Roslin Institute, University of Edinburgh, Easter Bush Campus, Midlothian EH25 9RG, United Kingdom
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Mizukami K, Dorsey-Oresto A, Raj K, Eringis A, Furrow E, Martin E, Yamanaka D, Kehl A, Kolicheski A, Jagannathan V, Leeb T, Lionakis MS, Giger U. Increased susceptibility to Mycobacterium avium complex infection in miniature Schnauzer dogs caused by a codon deletion in CARD9. Sci Rep 2024; 14:10346. [PMID: 38710903 PMCID: PMC11074286 DOI: 10.1038/s41598-024-61054-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2024] [Accepted: 04/30/2024] [Indexed: 05/08/2024] Open
Abstract
Mammals are generally resistant to Mycobacterium avium complex (MAC) infections. We report here on a primary immunodeficiency disorder causing increased susceptibility to MAC infections in a canine breed. Adult Miniature Schnauzers developing progressive systemic MAC infections were related to a common founder, and pedigree analysis was consistent with an autosomal recessive trait. A genome-wide association study and homozygosity mapping using 8 infected, 9 non-infected relatives, and 160 control Miniature Schnauzers detected an associated region on chromosome 9. Whole genome sequencing of 2 MAC-infected dogs identified a codon deletion in the CARD9 gene (c.493_495del; p.Lys165del). Genotyping of Miniature Schnauzers revealed the presence of this mutant CARD9 allele worldwide, and all tested MAC-infected dogs were homozygous mutants. Peripheral blood mononuclear cells from a dog homozygous for the CARD9 variant exhibited a dysfunctional CARD9 protein with impaired TNF-α production upon stimulation with the fungal polysaccharide β-glucan that activates the CARD9-coupled C-type lectin receptor, Dectin-1. While CARD9-deficient knockout mice are susceptible to experimental challenges by fungi and mycobacteria, Miniature Schnauzer dogs with systemic MAC susceptibility represent the first spontaneous animal model of CARD9 deficiency, which will help to further elucidate host defense mechanisms against mycobacteria and fungi and assess potential therapies for animals and humans.
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Affiliation(s)
- Keijiro Mizukami
- Section of Medical Genetics, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, USA.
- RIKEN Center for Integrative Medical Sciences, Laboratory for Genotyping Development, Yokohama, Kanagawa, Japan.
| | - Angella Dorsey-Oresto
- Section of Medical Genetics, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Karthik Raj
- Section of Medical Genetics, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Anna Eringis
- Section of Medical Genetics, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Eva Furrow
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, University of Minnesota, Saint Paul, MN, USA
| | - Errolyn Martin
- Wildlife Center of North Georgia, Inc., Acworth, GA, USA
| | - Daisuke Yamanaka
- Fungal Pathogenesis Section, Laboratory of Clinical Immunology and Microbiology (LCIM), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, USA
- Laboratory for Immunopharmacology of Microbial Products, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | | | - Ana Kolicheski
- Department of Veterinary Pathobiology, College of Veterinary Medicine, University of Missouri, Columbia, MO, USA
| | - Vidhya Jagannathan
- Institute of Genetics, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Tosso Leeb
- Institute of Genetics, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Michail S Lionakis
- Fungal Pathogenesis Section, Laboratory of Clinical Immunology and Microbiology (LCIM), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Urs Giger
- Section of Medical Genetics, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, USA.
- Vetsuisse Faculty, University of Zürich, Zurich, Switzerland.
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O'Halloran C, Barker EN, Hope JC, Gunn-Moore DA. Canine tuberculosis: A review of 18 new and 565 previously reported confirmed cases. Vet J 2024; 304:106089. [PMID: 38412886 DOI: 10.1016/j.tvjl.2024.106089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 01/30/2024] [Accepted: 02/23/2024] [Indexed: 02/29/2024]
Abstract
Cases of canine tuberculosis, a zoonotic infection of significant public health significance, are typically only sporadically reported in the literature. For this observational study, case details were collated both retrospectively and prospectively for dogs infected with Mycobacterium tuberculosis-complex (MTBC) organisms. A total of 18 previously unreported cases as well as 565 historically reported confirmed cases were reviewed. A variety of diagnostic techniques were used to make a confirmed diagnosis of tuberculosis (culture, interferon-gamma release assay [IGRA], and PCR). The reference standard for diagnosis is culture; however, this was negative or not attempted in some dogs. Where fully speciated, all cases were caused by infection with one of three MTBC organisms: M. tuberculosis, Mycobacterium bovis, or Mycobacterium microti. This study includes the first documented canine infections with M. microti in the UK. All cases were assigned to one of four clinical groups based on the presenting signs: 44.1% were primarily pulmonary, 14.5% were primarily abdominal, and the remainder were disseminated or miscellaneous. The development of adjunctive tests remains necessary to support early treatment decisions pending reporting of culture for MTBC organisms, which can take weeks to months. Definitive treatment, where attempted, was successful in most cases. Of the 13 dogs treated by the authors with triple combination antimicrobial therapy, a good clinical outcome was seen in 12 (92%) of them.
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Affiliation(s)
- Conor O'Halloran
- Royal (Dick) School of Veterinary Studies and The Roslin Institute, University of Edinburgh, Easter Bush Campus, Midlothian, EH25 9RG United Kingdom.
| | - Emi N Barker
- Langford Vets, University of Bristol, Langford BS40 5DU, United Kingdom; Bristol Veterinary School, University of Bristol, Langford BS40 5DU, United Kingdom
| | - Jayne C Hope
- Royal (Dick) School of Veterinary Studies and The Roslin Institute, University of Edinburgh, Easter Bush Campus, Midlothian, EH25 9RG United Kingdom
| | - Danièlle A Gunn-Moore
- Royal (Dick) School of Veterinary Studies and The Roslin Institute, University of Edinburgh, Easter Bush Campus, Midlothian, EH25 9RG United Kingdom
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Barandiaran S, Ponce L, Piras I, Rosas AC, Peña Martinez J, Marfil MJ. Detection of non-tuberculous mycobacteria in native wildlife species at conservation risk of Argentina. Front Vet Sci 2024; 11:1346514. [PMID: 38420209 PMCID: PMC10899436 DOI: 10.3389/fvets.2024.1346514] [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: 11/29/2023] [Accepted: 01/29/2024] [Indexed: 03/02/2024] Open
Abstract
Introduction Non-tuberculous Mycobacteria (NTM) are mainly environmental but can cause opportunistic infections and diseases in humans and animals. Livestock and wild animals can be infected with NTM. In Argentina, there are native wild species facing conservation risks, and they are the focus of protection and reintroduction projects designed to preserve biodiversity in various ecoregions. The aim of this study was to report the presence of NTM in samples collected from four endangered native wild species from nine Argentine provinces, as part of their pre-release health assessment. Methods A total of 165 samples from giant anteater, peccary, tapir and pampas deer were obtained, these included either bronchoalveolar or endotracheal lavages, or oropharyngeal, nasopharyngeal or tracheal swabs. Bacteriological culture followed by molecular identification and sequencing were performed. Results A total of 27 NTM were detected, including Mycobacterium avium subsp. hominissuis, M. intracellulare, M. terrae, M. gordonense, M. kumamotonense, M. fortuitum, M. saskatchewanense, and M. genavense. Results revealed a 16,36% NTM recovery rate, with the giant anteater showing the highest prevalence among the mammals under study. Discussion In Argentina, due to extensive production systems, the interaction between domestic and wild species sharing the same environment is frequent, increasing the exposure of all the species to these NTM. In this way, the transmission of infectious agents from one to another is feasible. Moreover, NTMs might interfere with the diagnosis of bovine tuberculosis and paratuberculosis. These findings emphasize the importance of active health surveillance in conservation programs. It highlights the need to address NTM epidemiology in wildlife and its impact on conservation and public health.
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Affiliation(s)
- Soledad Barandiaran
- Laboratorio de Tuberculosis, Instituto de Investigaciones en Producción Animal (INPA), Universidad de Buenos Aires-CONICET, Buenos Aires, Argentina
- Cátedra de Enfermedades Infecciosas, Facultad de Ciencias Veterinarias, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Loreana Ponce
- Laboratorio de Tuberculosis, Instituto de Investigaciones en Producción Animal (INPA), Universidad de Buenos Aires-CONICET, Buenos Aires, Argentina
- Cátedra de Enfermedades Infecciosas, Facultad de Ciencias Veterinarias, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Indiana Piras
- Cátedra de Enfermedades Infecciosas, Facultad de Ciencias Veterinarias, Universidad de Buenos Aires, Buenos Aires, Argentina
| | | | | | - María Jimena Marfil
- Laboratorio de Tuberculosis, Instituto de Investigaciones en Producción Animal (INPA), Universidad de Buenos Aires-CONICET, Buenos Aires, Argentina
- Cátedra de Enfermedades Infecciosas, Facultad de Ciencias Veterinarias, Universidad de Buenos Aires, Buenos Aires, Argentina
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Prentice KD, Callahan‐Clark JE, Parry NM, Schwarz LA, Webster CRL. Characterization of clinical presentation, histological features, ultrasonographic findings, and survival in 29 dogs with granulomatous hepatitis. J Vet Intern Med 2024; 38:167-175. [PMID: 37994296 PMCID: PMC10800208 DOI: 10.1111/jvim.16937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Accepted: 11/02/2023] [Indexed: 11/24/2023] Open
Abstract
BACKGROUND Granulomatous hepatitis (GH) is a form of chronic hepatitis (CH) in dogs for which limited information is published. HYPOTHESIS Describe the clinical presentation, clinical pathology, ultrasound, and hepatic histopathology findings and to report survival times in dogs with GH. ANIMALS Twenty-nine client-owned dogs with GH. METHODS Retrospective observational study. Pathology records were searched. Inclusion criteria included a histopathologic diagnosis of GH, absence of an identified etiology or evidence of extrahepatic granulomatous disease, and a medical record available for review. Clinical presentation, clinical pathologic findings, treatment protocols, and survival times were recorded. Available hepatic biopsy material was graded and scored, and ultrasound evaluations reviewed. RESULTS The median age was 7 years (range, 0.66-12 years). Nineteen breeds were represented. Decreased appetite (19/29), lethargy (16/29), and fever (13/29) were seen most commonly. All dogs had increased serum transaminase activities, whereas 21/29 and 12/24 had hyperbilirubinemia and neutrophilia, respectively. Ultrasonographic findings included hepatomegaly (12/22), nodular parenchymal lesions (9/22), and hyperechoic parenchymal bands (8/22). Histopathologic necroinflammatory scores were moderate to severe in 16/19 dogs, and fibrosis scores were mild in 14/19 dogs. Treatments varied and included antibiotics, immunosuppressive drugs, and hepatoprotectants. Overall median survival was 635 days (range, 1-2482 days). CONCLUSION AND CLINICAL IMPORTANCE Granulomatous hepatitis in dogs is associated with high histopathologic grade, fever, neutrophilia, and a high incidence of hepatomegaly and focal parenchymal lesions on ultrasound examination. Despite disease severity on presentation, dogs with GH can have a good outcome with prolonged survival.
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Affiliation(s)
- Kayla D. Prentice
- Cummings School of Veterinary Medicine at Tufts UniversityNorth GraftonMassachusettsUSA
| | | | - Nicola M. Parry
- Cummings School of Veterinary Medicine at Tufts UniversityNorth GraftonMassachusettsUSA
- Present address:
CBSET, IncLexingtonMassachusettsUSA
| | - Leslie A. Schwarz
- Cummings School of Veterinary Medicine at Tufts UniversityNorth GraftonMassachusettsUSA
| | - Cynthia R. L. Webster
- Cummings School of Veterinary Medicine at Tufts UniversityNorth GraftonMassachusettsUSA
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Faccin M, Wiener DJ, Rech RR, Santoro D, Rodrigues Hoffmann A. Common superficial and deep cutaneous bacterial infections in domestic animals: A review. Vet Pathol 2023; 60:796-811. [PMID: 37264789 DOI: 10.1177/03009858231176558] [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: 06/03/2023]
Abstract
The skin covers the external surface of animals, and it is constantly exposed to and inhabited by different microorganisms, including bacteria. Alterations in the skin barrier allow commensal and/or pathogenic bacteria to proliferate and penetrate deep into the lower layers of the skin. Being the first barrier to the external environment, the skin is prone to injuries, allowing the penetration of microorganisms that may lead to severe deep infections. Companion animals, especially dogs, are prone to bacterial infections, often secondary to allergic dermatitis. When environmental conditions are unfavorable, horses, cattle, sheep, and goats can develop superficial infections, such as those caused by Dermatophilus congolensis. Deep inflammation is commonly caused by Mycobacterium spp., which results in granulomatous to pyogranulomatous dermatitis and panniculitis. Likewise, bacteria such as Nocardia spp. and Actinomyces spp. can cause deep pyogranulomatous inflammation. Bacteria that lead to deep necrotizing lesions (eg, necrotizing fasciitis/flesh-eating bacteria) can be severe and even result in death. This review includes an overview of the most common cutaneous bacterial infections of domestic animals, highlighting the main features and histologic morphology of the bacteria, cutaneous structures involved, and the type of inflammatory infiltrates.
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Orłowska B, Majchrzak M, Didkowska A, Anusz K, Krajewska-Wędzina M, Zabost A, Brzezińska S, Kozińska M, Augustynowicz-Kopeć E, Urbańska K, Welz M, Parniewski P. Mycobacterial Interspersed Repeat Unit-Variable Number Tandem Repeat Typing of Mycobacterium avium Strains Isolated from the Lymph Nodes of Free-Living Carnivorous Animals in Poland. Pathogens 2023; 12:1184. [PMID: 37764992 PMCID: PMC10536629 DOI: 10.3390/pathogens12091184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 09/14/2023] [Accepted: 09/17/2023] [Indexed: 09/29/2023] Open
Abstract
Non-tuberculous mycobacteria (NTM) are ubiquitous organisms, of which some, especially those of the Mycobacterium avium complex (MAC), may be opportunistic animal and human pathogens. Infection with NTM can interfere with tuberculosis (TB) diagnosis and induce zoonoses, especially in immunocompromised individuals. Diseases caused by NTM have become more readily recognized; however, they are likely still underestimated. In this study, we identified and genotyped Mycobacterium avium strains that were isolated during TB monitoring among free-living carnivorous animals from southeastern Poland. In 2011-2020, lymph node samples from 192 such animals were tested for mycobacteria. A total of 41 isolates of M. avium strains were detected with the use of IS901, IS900, IS1245, and mycobacterial interspersed repeat unit-variable number tandem repeat (MIRU-VNTR) identification. Thirty-three were identified as M. avium subsp. avium. These strains were derived from 1 beech marten (Martes foina), 1 common buzzard (Buteo buteo), 2 European badgers (Meles meles), 3 wolves (Canis lupus), and 26 red foxes (Vulpes vulpes). One strain isolated from a wolf was identified as M. avium subsp. hominissuis. The results show the widespread occurrence of MAC bacilli in the studied environment and additionally comprise new data on the molecular characteristics of M. avium subspecies carried by free-living southeastern Polish carnivores.
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Affiliation(s)
- Blanka Orłowska
- Department of Food Hygiene and Public Health Protection, Institute of Veterinary Medicine, Warsaw University of Life Sciences (SGGW), Nowoursynowska 159, 02-776 Warsaw, Poland; (A.D.); (K.A.)
| | - Marta Majchrzak
- Institute of Medical Biology, Polish Academy of Sciences, Lodowa 106, 93-232 Lodz, Poland
| | - Anna Didkowska
- Department of Food Hygiene and Public Health Protection, Institute of Veterinary Medicine, Warsaw University of Life Sciences (SGGW), Nowoursynowska 159, 02-776 Warsaw, Poland; (A.D.); (K.A.)
| | - Krzysztof Anusz
- Department of Food Hygiene and Public Health Protection, Institute of Veterinary Medicine, Warsaw University of Life Sciences (SGGW), Nowoursynowska 159, 02-776 Warsaw, Poland; (A.D.); (K.A.)
| | - Monika Krajewska-Wędzina
- Department of Microbiology, National Veterinary Research Institute, Aleja Partyzantów 57, 24-100 Puławy, Poland;
| | - Anna Zabost
- Department of Microbiology, National Tuberculosis Reference Laboratory, National Tuberculosis and Lung Diseases Research Institute, Płocka 26, 01-138 Warsaw, Poland; (A.Z.); (S.B.); (M.K.); (E.A.-K.)
| | - Sywia Brzezińska
- Department of Microbiology, National Tuberculosis Reference Laboratory, National Tuberculosis and Lung Diseases Research Institute, Płocka 26, 01-138 Warsaw, Poland; (A.Z.); (S.B.); (M.K.); (E.A.-K.)
| | - Monika Kozińska
- Department of Microbiology, National Tuberculosis Reference Laboratory, National Tuberculosis and Lung Diseases Research Institute, Płocka 26, 01-138 Warsaw, Poland; (A.Z.); (S.B.); (M.K.); (E.A.-K.)
| | - Ewa Augustynowicz-Kopeć
- Department of Microbiology, National Tuberculosis Reference Laboratory, National Tuberculosis and Lung Diseases Research Institute, Płocka 26, 01-138 Warsaw, Poland; (A.Z.); (S.B.); (M.K.); (E.A.-K.)
| | - Kaja Urbańska
- Department of Morphological Sciences, Division of Histology and Embryology, Institute of Veterinary Medicine, Warsaw University of Life Sciences (SGGW), Nowoursynowska 159, 02-776 Warsaw, Poland;
| | - Mirosław Welz
- Provincial Veterinary Inspectorate, Piotra Ścigiennego 6a, 38-400 Krosno, Poland;
| | - Paweł Parniewski
- Institute of Medical Biology, Polish Academy of Sciences, Lodowa 106, 93-232 Lodz, Poland
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Hashemzadeh M, Dezfuli AA, Khosravi AD, Bandbal MM, Ghorbani A, Hamed M, Dezfuli SK. Molecular identification of non-tuberculous mycobacterial species isolated from extrapulmonary samples using real-time PCR and rpoB sequence analysis. AMB Express 2023; 13:43. [PMID: 37147556 PMCID: PMC10163175 DOI: 10.1186/s13568-023-01553-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Accepted: 04/25/2023] [Indexed: 05/07/2023] Open
Abstract
Tuberculosis (TB) is one of the leading causes of mortality among infectious diseases and accounts for a serious health hazard wordwide. Apart from TB, the members of non-tuberculous mycobacteria (NTM), which includes around 170 species, may also cause different diseases in humans. Therefore this study aimed to investigate the distribution of NTM strains isolated from extrapulmonary (EP) samples by Real-Time PCR and PCR-sequencing methods in Southwest Iran. Three hundred and twenty-five suspected EP samples were collected from patients referred to the referral hospitals in Ahvaz, Iran. The isolates were initially screened by acid fast staining and identified by phenotypic culture and biochemical tests. The Real-Time PCR and rpoB- based PCR methods were performed followed by sequence analysis of rpoB gene. From 124 samples, 77 (62%) were positive for NTM by culture and rpoB sequence analysis. M. fortuitum was the most commonly isolated NTM in present study. In Real-Time PCR, only 69 (55.64%) isolates showed more homology with standard NTM isolates. In general, the growing trend of EPNTM infections in Iran needs specific programs and resources to get a better diagnosis. PCR sequencing is a reliable method, it can be used for definitive identification of positive cultures for identification of NTM species.
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Affiliation(s)
- Mohammad Hashemzadeh
- Infectious and Tropical Diseases Research Center, Health Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
- Department of Microbiology, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Aram Asarehzadegan Dezfuli
- Department of Microbiology, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Azar Dokht Khosravi
- Infectious and Tropical Diseases Research Center, Health Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
- Department of Microbiology, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
| | - Maryam Moradi Bandbal
- Department of Microbiology, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Atousa Ghorbani
- Department of Microbiology, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Mahtab Hamed
- Immunobiology Center of Pasteur Medical Laboratory, Ahvaz, Iran
| | - Soolmaz Khandan Dezfuli
- Department of Microbiology, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
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Tikute P, Narang D, Chandra M, Turkar S, Gupta K. Detection of the Mycobacterium avium complex in dogs with lymphadenitis. IRANIAN JOURNAL OF VETERINARY RESEARCH 2023; 24:320-327. [PMID: 38799288 PMCID: PMC11127736 DOI: 10.22099/ijvr.2023.45268.6651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 10/03/2023] [Accepted: 10/16/2023] [Indexed: 05/29/2024]
Abstract
Background Mycobacterium avium complex (MAC) is connected to human immunosuppressive diseases, including HIV-AIDS, and may pose a zoonotic threat. MAC causes lymphadenopathy in children, respiratory infection in adults, and generalized infection in immunocompromised individuals. Infection with nontuberculous Mycobacteria (NTM) in humans is now primarily brought on by MAC. Recently, MAC members have emerged as pathogenic organisms for animals and humans. While dogs are generally resistant to mycobacterial infections, there have been some cases of infection that result in systemic or disseminated diseases. The organisms can be transmitted to dogs through oral contact, and their faeces can be a possible source of infection for dog owners. It is important to note that this ailment is zoonotic, especially if infected pet dogs are in prolonged contact with their humans. Aims The study was planned to demonstrate the occurrence of MAC organisms and other Mycobacteria in dogs associated with lymphadenopathy cases with special emphasis on lymphadenitis. Methods A total of 123 samples (100 lymph node aspirates, 15 lymph node tissues, and 8 blood samples) from 83 dogs suspected of lymphadenitis accompanied by gastroenteritis, chronic skin infections, immunosuppression, chronic pulmonary diseases, and other chronic undiagnosed diseases were studied. The samples were processed for cytological and microscopic examination by Ziehl-Neelsen staining. Following the decontamination procedure, the aspiration and lymph node tissue samples were inoculated into Middlebrook 7H11 media for up to 8 weeks. The aspirated material was also directly used for molecular detection by triplex-nested polymerase chain reaction (nPCR) assay. Results A cytological study revealed pyogranulomatous inflammation of the lymph node tissue. Impression smears from lymph node tissues displayed the presence of acid-fast organisms. Out of 83 cases of dogs, 8 were found to be positive for Mycobacterium spp. Among those 8 positive cases, 3 were confirmed to belong to MAC, and 5 belonged to the Mycobacterium tuberculosis complex (MTB complex). Conclusion MAC and MTB are the underestimated bacteria that could be the causative agents of lymphadenitis in animals.
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Affiliation(s)
- P. Tikute
- MVSc Student in Veterinary Microbiology, Department of Veterinary Microbiology, College of Veterinary Science, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana-141004, Punjab, India
| | - D. Narang
- Department of Veterinary Microbiology, College of Veterinary Science, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana-141004, Punjab, India
| | - M. Chandra
- Department of Veterinary Microbiology, College of Veterinary Science, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana-141004, Punjab, India
| | - S. Turkar
- Department of Veterinary Medicine, College of Veterinary Science, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana-141004, Punjab, India
| | - K. Gupta
- Department of Veterinary Pathology, College of Veterinary Science, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana-141004, Punjab, India
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Borrás P, Marfil MJ, Tellado M, Hernandez D, Osacar JM, Piras I, Martinez Vivot M, Barandiaran S. Mycobacterium avium in miniature schnauzer from Argentina: a series of cases. Top Companion Anim Med 2022; 51:100698. [PMID: 35985408 DOI: 10.1016/j.tcam.2022.100698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 07/21/2022] [Accepted: 08/11/2022] [Indexed: 10/31/2022]
Abstract
Environmental mycobacteria such as those from the Mycobacterium avium-intacellulare complex may cause disseminated and severe disease in dogs with genetic predisposition. A series of cases of four miniature schnauzers with nonspecific clinical signs and the diagnostic tests are described. Complementary means of diagnosis including complete blood count, biochemical serum analyses and fine needle aspiration cytology staining were performed. The bacteriological culture followed by PCR amplification of 1245 and 901 insertion sequences, allowed the identification of Mycobacterium avium subsp. hominissuis. This environmental Mycobacteria normally do not cause severe disease in dogs or other species, but when CARD-9 gene presents mutations, dogs may become extremely susceptible and disease is fast, disseminated and fatal. Antibiotic therapy can be applied under veterinary consideration in specific situations, as treatment is usually applied for a long period of time. Although zoonotic risk is low as the Mycobacterium is environmental, contamination of the location may be high, and immunosuppressed animals and humans can develop infection as well. This report may aid clinical veterinarians in the diagnosis, treatment, and prognosis in similar cases of this breed and others with the genetic predisposition.
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Affiliation(s)
- Pablo Borrás
- Servicio de Enfermedades Infecciosas y Parasitarias en Animales de Compañía, Clínica Veterinaria Panda. Ciudad Autónoma de Buenos Aires, Argentina
| | - María Jimena Marfil
- Universidad de Buenos Aires, Facultad de Ciencias Veterinarias, Cátedra de Enfermedades Infecciosas. Buenos Aires, Argentina.
| | - Matias Tellado
- VetOncologia Cancer Clinic, Ciudad Autónoma de Buenos Aires, Argentina
| | - Diego Hernandez
- Centro Este Medicina Veterinaria. General Pico, La Pampa, Argentina
| | | | - Indiana Piras
- Universidad de Buenos Aires, Facultad de Ciencias Veterinarias, Cátedra de Enfermedades Infecciosas. Buenos Aires, Argentina
| | - Marcela Martinez Vivot
- Universidad de Buenos Aires, Facultad de Ciencias Veterinarias, Cátedra de Enfermedades Infecciosas. Buenos Aires, Argentina
| | - Soledad Barandiaran
- Universidad de Buenos Aires, Facultad de Ciencias Veterinarias, Cátedra de Enfermedades Infecciosas. Buenos Aires, Argentina; Instituto de Investigaciones en Producción Animal (INPA), Consejo Nacional de Investigaciones Científicas y Técnicas-Universidad de Buenos Aires, Buenos Aires, Argentina
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12
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Häußler TC, Thom N, Prenger-Berninghoff E, Köhler K, Barth SA. Challenging diagnosis and successful treatment of localised Mycobacterium avium subsp. hominissuis glossitis in a dog on long-term immunomodulatory therapy. N Z Vet J 2022; 70:340-348. [PMID: 35968551 DOI: 10.1080/00480169.2022.2113166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
Abstract
CASE HISTORY A 3-year-old, intact female mixed-breed dog, weighing 7 kg, was presented with generalised swelling of the tongue, leading to impaired deglutition and episodes of dyspnoea. From the age of 2 years the dog had been under immunosuppressive therapy due to atopic dermatitis. CLINICAL FINDINGS AND TREATMENT Multiple nodular lesions at the apex of the tongue were noted as well as mandibular and retropharyngeal lymph node enlargement. Serum biochemistry results showed inflammatory changes. The results of several biopsies taken over 7 months indicated persistent pyogranulomatous and necrotising glossitis despite ongoing antimicrobial treatment with first amoxicillin/clavulanic acid and then pradofloxacin. No foreign material, acid-fast bacteria or fungal hyphae were detected throughout. The final diagnosis of Mycobacterium avium subsp. hominissuis (Mah) was reached after PCR and bacterial culture were carried out on the third biopsy sample. Therapy was initiated with rifampicin, clarithromycin and doxycycline, leading to complete remission of the lesions. DIAGNOSIS Severe chronic pyogranulomatous and necrotising glossitis associated with infection by Mah. CLINICAL RELEVANCE This report describes challenges in the diagnosis and therapy of a localised Mah infection in an iatrogenically immunocompromised dog. Successful treatment was only achieved with a specific combination of antibiotics administered long-term.
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Affiliation(s)
- T C Häußler
- Clinic for Small Animals, Surgical Department, Justus Liebig University, Giessen, Germany
| | - N Thom
- Clinic for Small Animals, Department of Dermatology, Justus Liebig University, Giessen, Germany
| | - E Prenger-Berninghoff
- Institute of Hygiene and Infectious Diseases of Animals, Justus Liebig University, Giessen, Germany
| | - K Köhler
- Institute of Veterinary Pathology, Justus Liebig University, Giessen, Germany
| | - S A Barth
- Friedrich-Loeffler-Institute/Federal Research Institute for Animal Health, Institute of Molecular Pathogenesis, Jena, Germany
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13
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Mycobacterium intracellulare induces a Th17 immune response via M1-like macrophage polarization in canine peripheral blood mononuclear cells. Sci Rep 2022; 12:11818. [PMID: 35821058 PMCID: PMC9276657 DOI: 10.1038/s41598-022-16117-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Accepted: 07/05/2022] [Indexed: 11/11/2022] Open
Abstract
Mycobacterium avium-intracellulare complex (MAC) is one of the most prevalent pathogenic nontuberculous mycobacteria that cause chronic pulmonary disease. The prevalence of MAC infection has been rising globally in a wide range of hosts, including companion animals. MAC infection has been reported in dogs; however, little is known about interaction between MAC and dogs, especially in immune response. In this study, we investigated the host immune response driven by M. intracellulare using the co-culture system of canine T helper cells and autologous monocyte-derived macrophages (MDMs). Transcriptomic analysis revealed that canine MDMs differentiated into M1-like macrophages after M. intracellulare infection and the macrophages secreted molecules that induced Th1/Th17 cell polarization. Furthermore, canine lymphocytes co-cultured with M. intracellulare-infected macrophages induced the adaptive Th17 responses after 5 days. Taken together, our results indicate that M. intracellulare elicits a Th17 response through macrophage activation in this system. Those findings might help the understanding of the canine immune response to MAC infection and diminishing the potential zoonotic risk in One Health aspect.
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Mycobacterium tuberculosis infection in a free-ranging urban dog from Argentina. Vet Res Commun 2022; 46:781-788. [PMID: 35133571 DOI: 10.1007/s11259-022-09898-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Accepted: 02/02/2022] [Indexed: 10/19/2022]
Abstract
Mycobacterium bovis and Mycobacterium avium are the most important Mycobacteria isolated from diseased dogs, but Mycobacterium tuberculosis can be isolated as well, especially when close contact with humans exists. Free ranging street dogs may carry zoonotic diseases, being a potential health risk to new owners after adoption. In this study, the clinical case of a dog affected by Mycobacterium tuberculosis is described. A six-year-old bitch that had been living with a homeless man was rescued and put for adoption in dog shelter. After being adopted, her health declined, and abdominal ultrasound and exploratory laparoscopy were performed. A tuberculosis-like lesion in the liver was biopsied and histopathological, bacteriological, and molecular analyses were carried out. Then, the animal was euthanized and necropsied, and disseminated macroscopic tuberculosis-like lesions were observed in abdominal organs. Mycobacterium presence was confirmed by histopathological and bacteriological methods. Genotyping identified a SIT-1228 Mycobacterium tuberculosis strain. Notification to the sanitary authorities was performed and the couple that had contact with the dog were alerted and sent to the hospital for assessment, as Mycobacterium tuberculosis is a primary pathogenic agent for humans. The epidemiology in this clinical case is unclear, but the most likely source of infection might have been consumption of sputum contaminated food during the years that this bitch lived with the homeless man, because this person had died with chronic respiratory symptoms. Veterinarians must consider this disease and perform a complete diagnosis when dogs that used to live on the streets show nonspecific clinical signs.
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Gelendi S, Taylor S, D'Aout C, Pitchford C, Coldrick O, Sanchez-Jimenez C, O'Halloran C. Mycobacterium avium infection associated with sterile polyarthritis in a dog. J Small Anim Pract 2021; 63:154-158. [PMID: 34468983 DOI: 10.1111/jsap.13420] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 08/04/2021] [Accepted: 08/06/2021] [Indexed: 01/06/2023]
Abstract
A 1-year-old male neutered Portuguese Podengo dog was presented for lameness, inappetence, pyrexia, diarrhoea and abdominal moderate to severe lymphadenomegaly. Cytology of synovial fluid revealed neutrophilic inflammation in multiple joints suggestive of immune-mediated polyarthritis. Cytology of fine-needle-aspiration material obtained from lymph nodes revealed macrophages with intracytoplasmic, rod-like Ziehl-Neelsen positive staining structures, indicative of mycobacteria. Four-month treatment with enrofloxacin, rifampicin and clarithromycin resulted in clinical improvement and resolution of polyarthritis as evidenced on repeat synoviocentesis, but diarrhoea recurred, Ziehl-Neelsen positive organisms were again found on lymph node cytology and analysis of the 16S rRNA-gene using the Basic Local Alignment Search Tool facility resulted in a match to Mycobacterium avium with 100% sequence identity. Treatment was adjusted to include pradofloxacin, doxycycline, rifampicin and ethambutol and 3 months later the dog is clinically normal. Based on the literature search, this is the first time canine Mycobacterium avium infection associated with immune-mediated polyarthritis is reported. Based on scoping searches, this is the first report of canine Mycobacterium avium infection associated with immune-mediated polyarthritis.
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Affiliation(s)
- S Gelendi
- Department of Internal Medicine, Lumbry Park Veterinary Specialists, Alton, Hampshire, GU34 3HL, UK
| | - S Taylor
- Department of Internal Medicine, Lumbry Park Veterinary Specialists, Alton, Hampshire, GU34 3HL, UK
| | - C D'Aout
- Department of Internal Medicine, Lumbry Park Veterinary Specialists, Alton, Hampshire, GU34 3HL, UK
| | - C Pitchford
- Department of Clinical Pathology, Synlab VPG, Exeter, Devon, EX5 2FN, UK
| | - O Coldrick
- Department of Clinical Pathology, Synlab VPG, Exeter, Devon, EX5 2FN, UK
| | - C Sanchez-Jimenez
- Department of Internal Medicine, Lumbry Park Veterinary Specialists, Alton, Hampshire, GU34 3HL, UK
| | - C O'Halloran
- Division of Infection and Immunity, The Royal (Dick) School of Veterinary Studies, Edinburgh, Midlothian, EH25 9RG, UK
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Unusual Presentation of Feline Leprosy Caused by Mycobacterium lepraemurium in the Alpine Region. Pathogens 2021; 10:pathogens10060687. [PMID: 34206105 PMCID: PMC8226594 DOI: 10.3390/pathogens10060687] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Revised: 05/27/2021] [Accepted: 05/28/2021] [Indexed: 12/31/2022] Open
Abstract
A 9-year-old cat was referred with multiple, raised, ulcerative and non-ulcerative nodules in the periocular area, sclera and ear-base region, and on the ventral aspect of the tongue. In addition, a progressive ulcerative skin nodule on the tail was observed. Fine-needle aspirations of multiple nodules from the eyelid and sclera revealed the presence of histiocytes with numerous acid-fast intracellular bacilli. The replication of slowly growing mycobacteria in liquid media was detected from biopsied nodules after three months of incubation. The molecular characterization of the isolate identified Mycobacterium (M.) lepraemurium as the cause of the infection. The cat was treated with a combination of surgical excision and a four-week course of antimicrobial therapy including rifampicin combined with clarithromycin. This is an unusual manifestation of feline leprosy and the first molecularly confirmed M. lepraemurium infection in a cat with ocular involvement in Europe. The successful combination of a surgical and antimycobacterial treatment regimen is reported.
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Rokhsar JL, Canino J, Raj K, Yuhnke S, Slutsky J, Giger U. Web resource on available DNA variant tests for hereditary diseases and genetic predispositions in dogs and cats: An Update. Hum Genet 2021; 140:1505-1515. [PMID: 33547946 DOI: 10.1007/s00439-021-02256-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 01/11/2021] [Indexed: 11/26/2022]
Abstract
Vast progress has been made in the clinical diagnosis and molecular basis of hereditary diseases and genetic predisposition in companion animals. The purpose of this report is to provide an update on the availability of DNA testing for hereditary diseases and genetic predispositions in dogs and cats utilizing the WSAVA-PennGen DNA Testing Database web resource (URL: http://research.vet.upenn.edu/WSAVA-LabSearch ). Information on hereditary diseases, DNA tests, genetic testing laboratories and afflicted breeds added to the web-based WSAVA-PennGen DNA Testing Database was gathered. Following verification through original research and clinical studies, searching various databases on hereditary diseases in dogs and cats, and contacting laboratories offering DNA tests, the data were compared to the resource reported on in 2013. The number of molecularly defined Mendelian inherited diseases and variants in companion animals listed in the WSAVA-PennGen DNA Testing Database in 2020 drastically increased by 112% and 141%, respectively. The number of DNA variant tests offered by each laboratory has also doubled for dogs and cats. While the overall number of laboratories has only slightly increased from 43 to 47, the number of larger corporate laboratories increased, while academic laboratories have declined. In addition, there are now several laboratories that are offering breed-specific or all-breed panel tests rather than single-DNA tests for dogs and cats. This unique regularly updated searchable web-based database allows veterinary clinicians, breeders and pet owners to readily find available DNA tests, laboratories performing these DNA tests worldwide, and canine and feline breeds afflicted and also serves as a valuable resource for comparative geneticists.
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Affiliation(s)
- Jennifer L Rokhsar
- Section of Medical Genetics (PennGen Laboratories), School of Veterinary Medicine, University of Pennsylvania, 3900 Delancey St., Philadelphia, PA, 19104-6010, USA
| | - Julia Canino
- Section of Medical Genetics (PennGen Laboratories), School of Veterinary Medicine, University of Pennsylvania, 3900 Delancey St., Philadelphia, PA, 19104-6010, USA
| | - Karthik Raj
- Section of Medical Genetics (PennGen Laboratories), School of Veterinary Medicine, University of Pennsylvania, 3900 Delancey St., Philadelphia, PA, 19104-6010, USA
| | - Scott Yuhnke
- Section of Medical Genetics (PennGen Laboratories), School of Veterinary Medicine, University of Pennsylvania, 3900 Delancey St., Philadelphia, PA, 19104-6010, USA
| | - Jeffrey Slutsky
- Section of Medical Genetics (PennGen Laboratories), School of Veterinary Medicine, University of Pennsylvania, 3900 Delancey St., Philadelphia, PA, 19104-6010, USA
| | - Urs Giger
- Section of Medical Genetics (PennGen Laboratories), School of Veterinary Medicine, University of Pennsylvania, 3900 Delancey St., Philadelphia, PA, 19104-6010, USA.
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Kim S, Park HE, Park WB, Kim SY, Park HT, Yoo HS. Mycobacterium avium Modulates the Protective Immune Response in Canine Peripheral Blood Mononuclear Cells. Front Cell Infect Microbiol 2021; 10:609712. [PMID: 33520738 PMCID: PMC7840563 DOI: 10.3389/fcimb.2020.609712] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Accepted: 11/30/2020] [Indexed: 12/31/2022] Open
Abstract
Mycobacterium avium, an opportunistic intracellular pathogen, is a member of the non-tuberculous mycobacteria species. M. avium causes respiratory disease in immunosuppressed individuals and a wide range of animals, including companion dogs and cats. In particular, the number of infected companion dogs has increased, although the underlying mechanism of M. avium pathogenesis in dogs has not been studied. Therefore, in the present study, the host immune response against M. avium in dogs was investigated by transcriptome analysis of canine peripheral blood mononuclear cells. M. avium was shown to induce different immune responses in canine peripheral blood mononuclear cells at different time points after infection. The expression of Th1-associated genes occurred early during M. avium infection, while that of Th17-associated genes increased after 12 h. In addition, the expression of apoptosis-related genes decreased and the abundance of intracellular M. avium increased in monocyte-derived macrophages after infection for 24 h. These results reveal the M. avium induces Th17 immune response and avoids apoptosis in infected canine cells. As the number of M. avium infection cases increases, the results of the present study will contribute to a better understanding of host immune responses to M. avium infection in companion dogs.
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Affiliation(s)
- Suji Kim
- Department of Infectious Diseases, College of Veterinary Medicine, Seoul National University, Seoul, South Korea
- BK21 FOUR Future Veterinary Medicine Leading Education and Research Center, Seoul National University, Seoul, South Korea
| | - Hyun-Eui Park
- Department of Microbiology, College of Medicine, Gyeongsang National University, Jinju, South Korea
| | - Woo Bin Park
- Department of Infectious Diseases, College of Veterinary Medicine, Seoul National University, Seoul, South Korea
| | - Seo Yihl Kim
- Department of Veterinary Physiology, College of Veterinary Medicine, Seoul National University, Seoul, South Korea
| | - Hong-Tae Park
- Department of Infectious Diseases, College of Veterinary Medicine, Seoul National University, Seoul, South Korea
| | - Han Sang Yoo
- Department of Infectious Diseases, College of Veterinary Medicine, Seoul National University, Seoul, South Korea
- BK21 FOUR Future Veterinary Medicine Leading Education and Research Center, Seoul National University, Seoul, South Korea
- Bio-MAX/N-Bio Institute, Seoul National University, Seoul, South Korea
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