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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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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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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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Ghielmetti G, Giger U. Mycobacterium avium: an Emerging Pathogen for Dog Breeds with Hereditary Immunodeficiencies. CURRENT CLINICAL MICROBIOLOGY REPORTS 2020; 7:67-80. [PMID: 33842195 DOI: 10.1007/s40588-020-00145-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Purpose of Review Among the nontuberculous mycobacteria (NTM), Mycobacterium avium complex (MAC) is the leading cause of pulmonary disease in humans. Innate and acquired immunodeficiencies have been associated with an increased host susceptibility to NTM infections. The underlying mechanisms predisposing humans and dogs to MAC infections is being elucidated. Recent Findings Although MAC infection is infrequently diagnosed in dogs, a strong breed predisposition particularly for Miniature Schnauzer and Basset Hound dogs is evident. A recessively inherited defect of the adaptor protein CARD9 has recently been documented to be responsible for the increased susceptibility to MAC in the Miniature Schnauzer breed. Summary Given the zoonotic potential of a MAC infected dog particularly to immunocompromised human patients, diseased dogs pose a public health risk. While not a reportable disease, treatment of systemic mycobacteriosis is generally not effective and discouraged in dogs. The collaborative efforts by microbiologists, veterinary clinicians, dog breeders, primary care physicians, and infectious disease specialists applying the One Health approach is therefore crucial for the best management and prevention of MAC infection.
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Affiliation(s)
- Giovanni Ghielmetti
- Institute for Food Safety and Hygiene, Section of Veterinary Bacteriology, University of Zurich, Winterthurerstrasse 270, 8057 Zurich, Switzerland
| | - Urs Giger
- Clinic for Small Animal Internal Medicine, Vetsuisse Faculty, University of Zurich, Winterthurerstrasse 260, 8057 Zürich, Switzerland
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Sharp E, Taylor S, O'Halloran C. Unusual presentation of canine Mycobacterium avium infection. Vet Rec 2019; 184:800. [PMID: 31164481 DOI: 10.1136/vr.105311] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 04/09/2019] [Accepted: 05/03/2019] [Indexed: 01/15/2023]
Abstract
This short communication describes the clinical and morphological findings, diagnosis and treatment of a case of Mycobacterium avium infection in a golden retriever that presented with a progressive nasal swelling and lymphadenopathy. Although well documented in cats, where cutaneous lesions are frequently recognised, canine M avium infection is less commonly reported, and cutaneous lesions are rare. To the authors' knowledge this is the first documented case of canine M avium infection that presented with a cutaneous lesion but no systemic clinical signs. It occurred in a dog with no previously reported breed predisposition and highlights that in cases of cutaneous histiocytic infiltrate in dogs mycobacterial infection should remain a differential diagnosis, even in the absence of suggestive organisms on histopathological examination.
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Affiliation(s)
- Emily Sharp
- Lumbry Park Veterinary Specialists, Alton, UK
| | | | - Conor O'Halloran
- Royal Dick School of Veterinary Studies, University of Edinburgh, Easter Bush, UK.,Roslin Institute, University of Edinburgh, Roslin, UK
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Moreno B, Aduriz G, Garrido JM, Sevilla I, Juste RA. Disseminated Mycobacterium avium subsp. avium infection in a pet Korean squirrel (Sciuris vulgaris coreae). Vet Pathol 2016; 44:123-5. [PMID: 17197638 DOI: 10.1354/vp.44-1-123] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A disseminated Mycobacterium avium subsp. avium infection was diagnosed in a pet Korean squirrel. Grossly, multiple small nodules in the lung, liver, spleen, and skin were observed. Adrenal glands were very enlarged. The only tissue exhibiting necrosis and calcification was a very enlarged bronchial lymph node. The remaining lymph nodes were slightly enlarged. Moderate ascites was also observed. Microscopically, a disseminated granulomatous inflammation with numerous lymphocytes was seen. Acid-fast bacilli were detected in macrophages, in giant cells, free in the interstitium, and in some lymphatic vessels, both within cells and free in the lumen. M. avium subsp. avium was isolated and identified by polymerase chain reaction-restriction endonuclease analysis.
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Affiliation(s)
- B Moreno
- Neiker (Instituto Vasco de Investigación y Desarrollo Agrario), Berreaga 1, 48160-Derio Bizkaia, Spain.
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Szaluś-Jordanow O, Augustynowicz-Kopeć E, Czopowicz M, Olkowski A, Łobaczewski A, Rzewuska M, Sapierzyński R, Wiatr E, Garncarz M, Frymus T. Intracardiac tuberculomas caused by Mycobacterium tuberculosis in a dog. BMC Vet Res 2016; 12:109. [PMID: 27301275 PMCID: PMC4908798 DOI: 10.1186/s12917-016-0731-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Accepted: 06/07/2016] [Indexed: 11/10/2022] Open
Abstract
Background This paper presents an unusual form of disseminated Mycobacterium tuberculosis infection in a dog. The infection lasted at least one year and its main gross lesions were massive cardiac tuberculomas. To the best of our knowledge, this is the first report of heart tuberculomas in a dog. Case presentation A 9-year-old mixed-breed male dog weighing 10 kg was referred to the clinic for cardiological evaluation before general anesthesia. The echocardiography revealed a lump of about 20 mm in diameter in the area of the left atrium. Almost one year later the same dog was presented again in severe clinical state (fever, anorexia, weight loss, depression, cough, dyspnea, lymphadenomegaly, vomiting, recent episodes of fainting). Due to progression of the disease and poor effects of treatment the owner decided to euthanize the dog. Most prominent lesions observed during autopsy were diffuse pneumonia, fibrinous pericarditis and epicarditis as well as large, yellow, semisolid masses of caseous necrosis in the left and right atrium (30 mm and 15 mm in diameter, respectively). From both pulmonary and cardiac lesions M. tuberculosis was isolated on Lowenstein-Jensen slants and in Bactec Mycobacteria Growth Indicator Tube 960 liquid media, and confirmed by BD ProbeTec ET Direct Detection Assay and spoligotyping. Conclusion Companion animals may occasionally suffer from tuberculosis but majority of cases probably remain misdiagnosed or undetected. Typically tuberculosis in dogs affects lungs and their regional lymph nodes. Even in humans tuberculomas are rare manifestation of mycobacterial infection, mostly seen in the central nervous system. Atypical location of main tuberculous lesions may account for lack of correct ante mortem diagnosis in this case.
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Affiliation(s)
- Olga Szaluś-Jordanow
- Department of Small Animal Diseases with Clinic, Division of Infectious Diseases, Warsaw University of Life Sciences-SGGW, Nowoursynowska 159c Street, 02-776, Warsaw, Poland.
| | - Ewa Augustynowicz-Kopeć
- Department of Microbiology, Institute of Tuberculosis and Lung Diseases, Płocka 26 Street, 01-138, Warsaw, Poland
| | - Michał Czopowicz
- Laboratory of Veterinary Epidemiology and Economics, Warsaw University of Life Sciences-SGGW, Nowoursynowska 159 Street, 02-776, Warsaw, Poland
| | - Arkadiusz Olkowski
- Veterinary Clinic "Auxilium" Arkadiusz Olkowski, Królewska St. 64, 05-822, Milanówek, Poland
| | - Andrzej Łobaczewski
- Veterinary Clinic "Auxilium" Arkadiusz Olkowski, Królewska St. 64, 05-822, Milanówek, Poland
| | - Magdalena Rzewuska
- Department of Preclinical Sciences, Division of Microbiology, Warsaw University of Life Sciences-SGGW, Ciszewskiego 8 Street, 02-786, Warsaw, Poland
| | - Rafał Sapierzyński
- Department of Pathology and Veterinary Diagnostics, Warsaw University of Life Sciences-SGGW, Nowoursynowska 159 Street, 02-776, Warsaw, Poland
| | - Elżbieta Wiatr
- Third Department of Lung Diseases, Institute of Tuberculosis and Lung Diseases, Płocka 26 Street, 01-138, Warsaw, Poland
| | - Magdalena Garncarz
- Department of Pathology and Veterinary Diagnostics, Warsaw University of Life Sciences-SGGW, Nowoursynowska 159 Street, 02-776, Warsaw, Poland
| | - Tadeusz Frymus
- Department of Small Animal Diseases with Clinic, Division of Infectious Diseases, Warsaw University of Life Sciences-SGGW, Nowoursynowska 159c Street, 02-776, Warsaw, Poland
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Kim MC, Kim J, Kang W, Jang Y, Kim Y. Systemic infection of Mycobacterium avium subspecies hominissuis and fungus in a pet dog. J Vet Med Sci 2015; 78:157-60. [PMID: 26412202 PMCID: PMC4751138 DOI: 10.1292/jvms.15-0285] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
A 3-year-old neutered female poodle with a long history of dermatophytic skin disease was
presented with lethargy, anorexia and progressive weight loss. Abdominal ultrasonography
revealed markedly enlarged mesenteric lymph nodes and multiple hypoechoic foci in the
spleen. Cytology of the mesenteric lymph nodes and spleen showed granulomatous
inflammation with fungal organisms and negatively stained intracytoplasmic bacterial rods
consistent with Mycobacteria spp. Based on culture, multiplex polymerase
chain reaction and sequence analysis, the bacterium was identified as
Mycobacterium avium subspecies hominissuis. Despite treatment with
antibiotics, the dog’s condition deteriorated, and it died approximately 3 weeks after
first presentation.
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Affiliation(s)
- Myung-Chul Kim
- Laboratory of Veterinary Clinical Pathology, College of Veterinary Medicine, Seoul National University, Seoul 151-742, Republic of Korea
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Hobi S, Bettenay S, Majzoub M, Mueller R, Moser I. Mycobacterium avium
subspecies
hominissuis
infection in a dog from Germany with multifocal alopecia, exfoliative dermatitis, hypercalcaemia and subsequent sebaceous atrophy. VETERINARY RECORD CASE REPORTS 2015. [DOI: 10.1136/vetreccr-2014-000168] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Stefan Hobi
- Small Animal Medicine ClinicCentre for Clinical Veterinary MedicineLudwig Maximilian UniversityMunichGermany
| | | | - Monir Majzoub
- Institute for Veterinary PathologyLudwig Maximilian UniversityMunichGermany
| | - Ralf Mueller
- Small Animal Medicine ClinicCentre for Clinical Veterinary MedicineLudwig Maximilian UniversityMunichGermany
| | - Irmgard Moser
- Friedrich‐Loeffler InstituteFederal Research Institute for Animal HealthInstitute of Molecular PathogenesisJenaGermany
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Gonçalves S, Garcia K, Amaral PS, D'Elia K, Magalhães A, Rocha V. Infecção sistêmica por Mycobacterium avium em cão: relato de caso. ARQ BRAS MED VET ZOO 2013. [DOI: 10.1590/s0102-09352013000400025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Infecções sistêmicas causadas pelo complexo Mycobacterium avium em cães são consideradas raras. Em cães e gatos, a infecção resulta da ingestão de carne ou do contato com solo ou fômites contaminados. As manifestações clínicas de cães infectados por M. avium tendem a ser vagas ou ausentes, logo o diagnóstico in vivo torna-se difícil. A suspeita de infecção sistêmica por micobacteriose ocorreu, neste relato, após a identificação de bacilos álcool-ácido resistentes na amostra de medula óssea, os quais foram identificados como Mycobacterium avium pelo método molecular de reação em cadeia da polimerase com análise de restrição (PCR-PRA). Este animal apresentava uma aplasia de medula óssea em decorrência de Erhlichia canis, corroborando a maioria dos relatos na literatura em que se associa essa infecção a pacientes imunossuprimidos.
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Hutchins RG, Breitschwerdt EB, Cullen JM, Bissett SA, Gookin JL. Limited yield of diagnoses of intrahepatic infectious causes of canine granulomatous hepatitis from archival liver tissue. J Vet Diagn Invest 2012; 24:888-94. [PMID: 22855374 DOI: 10.1177/1040638712453583] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Canine granulomatous hepatitis is an uncommon morphologic diagnosis that has been associated with a variety of diseases, including a number of systemic infectious etiologies. Formalin-fixed, paraffin-embedded (FFPE) tissues are typically the only source of liver tissue remaining for additional testing for the presence of infectious disease within granulomas. It is unclear if the more common infectious culprits of granulomatous hepatitis can be identified from such specimens. The aim of the current study was to retrospectively investigate archival FFPE liver tissue from dogs with granulomatous hepatitis for the presence of infectious agents. Semiquantitative analysis of copper accumulation in liver specimens was also performed. Medical records were examined for recorded evidence of systemic infectious disease diagnosis. Formalin-fixed, paraffin-embedded liver was prospectively evaluated for infectious agents via differential staining techniques (n = 13), eubacterial fluorescent in situ hybridization (n = 11), and Bartonella polymerase chain reaction assays (n = 15). An infectious cause of granulomatous hepatitis was not identified within liver tissue from any dog using these diagnostic methodologies. Six out of 25 (24%) dogs were diagnosed with concurrent systemic or localized bacterial infections at the time of presentation. Nine out of 17 (53%) dogs had excessive hepatic copper accumulation when evaluated by a semiquantitative histologic grading scheme or quantitative copper analysis. As definitive infectious causes of granulomatous hepatitis were not identified within archival liver biopsy samples, it was concluded that investigation of infectious etiologies within FFPE liver specimens using these diagnostic approaches may be of low yield.
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Affiliation(s)
- Rae G Hutchins
- Department of Clinical Sciences, North Carolina State University, 1060 William Moore Drive, Raleigh, NC 27607, USA
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12
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Barber RM, Porter BF, Li Q, May M, Claiborne MK, Allison AB, Howerth EW, Butler A, Wei S, Levine JM, Levine GJ, Brown DR, Schatzberg SJ. Broadly reactive polymerase chain reaction for pathogen detection in canine granulomatous meningoencephalomyelitis and necrotizing meningoencephalitis. J Vet Intern Med 2012; 26:962-8. [PMID: 22686439 PMCID: PMC7166683 DOI: 10.1111/j.1939-1676.2012.00954.x] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2011] [Revised: 03/25/2012] [Accepted: 04/23/2012] [Indexed: 12/01/2022] Open
Abstract
Background Granulomatous meningoencephalomyelitis (GME) and necrotizing meningoencephalitis (NME) are common inflammatory conditions of the central nervous system of dogs. Infectious pathogens, particularly viruses, are suspected to contribute to the etiopathogenesis of GME and NME. Hypothesis Broadly reactive PCR might aid in the identification of infectious agents in GME and NME. Animals Sixty‐eight client‐owned dogs evaluated by necropsy at 1 university referral hospital. Methods A mixed prospective/retrospective case‐control study was performed. Brain tissue prospectively collected at necropsy from GME, NME, and control cases was evaluated by broadly reactive polymerase chain reaction (PCR) for adenoviruses, bunyaviruses, coronaviruses, enteroviruses, flaviviruses, herpesviruses, paramyxoviruses, and parechoviruses. In addition, these tissues were retrospectively evaluated for the presence of mycoplasmas by PCR, culture, and immunohistochemistry (IHC). Results Brain tissue was collected from 11 GME and 27 NME cases and 30 controls. Viral nucleic acids were not identified in the 6 GME cases, 25 NME cases, and 2 controls evaluated by viral PCR. Mycoplasma canis was identified by Mycoplasma genus PCR in 1/5 GME and 4/25 NME cases and subsequently was cultured from 4/5 GME and 4/8 NME cases as well as 2/9 controls. The IHC did not detect M. canis in any of the 11 GME and 27 NME cases or 14 controls evaluated with strain PG14 polyclonal antiserum. Conclusions and Clinical Importance The negative results suggest that viral pathogens are not common in the brain tissue of dogs with GME and NME. Further investigation is warranted to determine the importance of M. canis in cases of GME and NME.
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Affiliation(s)
- R M Barber
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
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13
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Campora L, Corazza M, Zullino C, Ebani VV, Abramo F. Mycobacterium avium subspecies hominissuis disseminated infection in a Basset Hound dog. J Vet Diagn Invest 2012; 23:1083-7. [PMID: 21908381 DOI: 10.1177/1040638711418616] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
In the current report, a case in Italy of disseminated Mycobacterium avium subsp. hominissuis infection in a dog from an American lineage of Basset Hounds is described. A 2-year-old intact female Basset Hound presented with persistent lymphadenopathy, lameness, and a history characterized by coccidiosis, bacterial gastroenteritis, and alopecia. Lymphadenitis, with macrophages containing a few intracytoplasmic, negative staining, Ziehl-Neelsen-positive bacilli, was detected by a popliteal fine-needle aspirate leading to the diagnosis of mycobacteriosis. Ultrasound and X-ray examinations revealed visceral and mediastinal lymphadenopathy. Because of the extent of the disease, the dog was humanely euthanized. Significant gross abnormalities, such as enlargement of the cranial mediastinal lymph nodes with encapsulated areas of caseous necrosis and generalized lymphadenopathy, were observed at necropsy. Granulomatous lesions were histopathologically detected in the liver and spleen. Ziehl-Neelsen-positive bacilli were observed in all examined lymph node, liver, spleen, lung, and bone marrow smears. Lymph nodes and liver were collected in order to pursue speciation by bacterial culture and molecular biology; multiplex polymerase chain reaction results classified the pathogen as M. avium subsp. hominissuis. Although an immune system deficiency was not investigated, anamnesis suggests that the dog was immunocompromised. Furthermore, the dog came from an American stock of Basset Hound, and for some of this breed, a predisposition to this infection has been hypothesized.
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Affiliation(s)
- Luca Campora
- Department of Animal Pathology, University of Pisa, viale delle Piagge 2, 56124 Pisa, Italy.
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Abstract
This article serves to review the various infectious diseases that affect the liver primarily or as a part of systemic infection. Although bacterial infections are probably the most common cause of infectious hepatitis, the clinician should be aware of other potential organisms and other commonly involved systems. Therefore, this article includes a description of common bacterial, mycobacterial, viral, fungal, protozoal, parasitic, and rickettsial diseases in dogs and cats.
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Affiliation(s)
- Shawn Kearns
- Angell Animal Medical Center-Boston, Boston, MA, USA.
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15
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Affiliation(s)
- A G Gow
- Royal (Dick) School of Veterinary Studies, University of Edinburgh, Hospital for Small Animals, Easter Bush Veterinary Centre, Roslin, Midlothian
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Naughton JF, Mealey KL, Wardrop KJ, Oaks JL, Bradway DS. Systemic Mycobacterium avium infection in a dog diagnosed by polymerase chain reaction analysis of buffy coat. J Am Anim Hosp Assoc 2007; 41:128-32. [PMID: 15767657 DOI: 10.5326/0410128] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Dogs may be infected by Mycobacterium (M.) tuberculosis, M. bovis, and M. avium complex, and the clinical signs associated with each of these infections may be indistinguishable. Rapid speciation of the infecting organism is desirable because of the public health concerns associated with M. bovis and M. tuberculosis infections. A mycobacterial infection was suspected in the dog of this report based on acid-fast staining of organisms in macrophages obtained from liver aspirates and buffy-coat preparations. Polymerase chain reaction (PCR) analysis of a buffy-coat preparation identified M. avium.
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Affiliation(s)
- James F Naughton
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Washington State University, Pullman, Washington 99164-6610, USA>
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17
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O'Toole D, Tharp S, Thomsen BV, Tan E, Payeur JB. Fatal mycobacteriosis with hepatosplenomegaly in a young dog due to Mycobacterium avium. J Vet Diagn Invest 2005; 17:200-4. [PMID: 15825507 DOI: 10.1177/104063870501700220] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Cases of disseminated Mycobacterium avium infections in dogs are rare because it appears that the species is innately resistant to infection. A 2-year-old, castrated, 5 kg Shih Tzu-Poodle-cross developed anemia, abdominal pain, lethargy, and splenomegaly. Histological examination of surgically removed spleen indicated marked granulomatous splenitis with myriad intracytoplasmic acid-fast bacterial rods. Ultrastructural examination revealed the presence of 3-4-microm-long mycobacteria in phagolysosomes of epithelioid macrophages. Tissue extract of lightly fixed spleen was positive for M. avium 16S ribosomal RNA and negative for M. tuberculosis complex IS6110 DNA by polymerase chain reaction testing. Anemia was associated with the presence of mycobacteria-infected macrophages in bone marrow. The animal's condition deteriorated, and euthanasia was performed after a clinical course of 2 months. The principal morphological findings at necropsy were severe diffuse granulomatous hepatitis, enteric lymphadenomegaly, and segmental granulomatous enteritis with intralesional mycobacteria present. Mycobacterium avium was cultured from enteric lymph nodes sampled at necropsy. The source of infection was not established but was presumed to be environmental with an enteric portal of entry.
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Affiliation(s)
- D O'Toole
- Wyoming State Veterinary Laboratory, Laramie, WY 82070, USA
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18
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Schatzberg SJ, Haley NJ, Barr SC, Lahunta A, Sharp NJ. Polymerase Chain Reaction Screening for DNA Viruses in Paraffin-Embedded Brains from Dogs with Necrotizing Meningoencephalitis, Necrotizing Leukoencephalitis, and Granulomatous Meningoencephalitis. J Vet Intern Med 2005. [DOI: 10.1111/j.1939-1676.2005.tb02726.x] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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19
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Turinelli V, Ledieu D, Guilbaud L, Marchal T, Magnol JP, Fournel-Fleury C. Mycobacterium tuberculosis infection in a dog from Africa. Vet Clin Pathol 2005; 33:177-81. [PMID: 15334356 DOI: 10.1111/j.1939-165x.2004.tb00371.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A 4-year-old male Boxer dog with a history of vomiting, diarrhea, and weight loss moved from West Africa to Lyon, France, where it was further evaluated. Radiographs revealed pleural effusion and enlargement of tracheobronchial lymph nodes and liver. Cytologic examination of the pleural effusion and a fine needle aspirate specimen of the liver showed mixed mononuclear inflammation with nonstaining rod structures within epithelioid histiocytes. At necropsy, the main gross pathologic findings were exudative pleuritis, nodular hepatitis, and infarcts and caseous nodules in the kidneys. The main histologic lesions were granulomatous hepatitis, granulomatous pneumonia, fibrinous leukocytic pleuritis, necrotic and fibro-calcified granulomatous lymphadenitis, and granulomatous nephritis. A Ziehl-Neelsen stain applied to both cytologic and histologic samples was positive for acid-fast bacilli. Bacterial culture of the pleural fluid was positive for Mycobacterium tuberculosis. Cytology is a valuable tool in the diagnosis of this important zoonotic disease.
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Affiliation(s)
- V Turinelli
- Laboratoire d'Hématologie-Cytologie-Immunopathologie, Ecole Nationale Vétérinaire de Lyon, France.
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Bauer N, Burkhardt S, Kirsch A, Weiss R, Moritz A, Baumgaertner W. Lymphadenopathy and diarrhea in a Miniature Schnauzer. Vet Clin Pathol 2002; 31:61-4. [PMID: 12040486 DOI: 10.1111/j.1939-165x.2002.tb00281.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Natali Bauer
- Clinic for Internal Medicine and Forensic Affairs, Justus-Liebig-University, Giessen, Germany.
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21
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Horn B, Forshaw D, Cousins D, Irwin PJ. Disseminated Mycobacterium avium infection in a dog with chronic diarrhoea. Aust Vet J 2000; 78:320-5. [PMID: 10904815 DOI: 10.1111/j.1751-0813.2000.tb11781.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
A 3-year-old Maltese-cross dog presented with a 4-month history of chronic diarrhoea and inappetence. Poorly regenerative anaemia, leukocytosis and hypoproteinaemia were evident on several occasions. Biopsies of stomach, duodenum and colon revealed marked infiltration of mucosae by macrophages containing many acid-fast bacilli. Similar organisms were numerous in a faecal smear. Melaena, hematochezia and severe abdominal pain developed and were unresponsive to therapy. Following euthanasia and necropsy, histiocytic cells containing acid-fast bacilli were found throughout the gastrointestinal tract, mesenteric and peripheral lymph nodes, spleen, liver, kidney and lungs. The organism was identified as Mycobacterium avium by bacterial culture and polymerase chain reaction testing.
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Affiliation(s)
- B Horn
- School of Veterinary Clinical Science, Division of Veterinary and Biomedical Sciences, Murdoch University, Western Australia
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