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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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2
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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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3
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Han HS, Gunn-Moore D. First report of Mycobacteria avium complex ( Mycobacteria intracellulare) in a cat from Southeast Asia. JFMS Open Rep 2023; 9:20551169231194311. [PMID: 37810578 PMCID: PMC10559717 DOI: 10.1177/20551169231194311] [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] [Indexed: 10/10/2023] Open
Abstract
Case summary A 3-year-old castrated male domestic shorthaired cat, with indoor-outdoor access, was presented for chronic, progressive multinodular to generalised subcutaneous nodules covering much of its body. Previous medical treatment with doxycycline had been unhelpful. Fine-needle aspiration of the nodules revealed intra- and extracellular multibacillary negative staining rods in pyogranulomatous inflammation. Bacterial culture and susceptibility studies isolated Mycobacterium intracellulare, with zimine as the drug of choice for treatment. Initial triple therapy with rifampicin, azithromycin and pradofloxacin was ineffective, and was changed to triple therapy with clofazimine, clarithromycin and doxycycline once drug susceptibility was known, which was given for 3 months, after which long-term therapy with clofazimine and clarithromycin was continued. Relevance and novel information Slow growing M intracellulare, a member of the Mycobacterium avium complex (MAC), has never been reported to cause disease in cats from Singapore and, by extension, Southeast Asia. The infection in this patient resulted in subcutaneous nodules, which started on the face, then spread to the feet and much of the rest of its body. This is in contrast to that commonly reported for infection with M avium, which is also a member of MAC, and may not only present with similar signs in cats, but also progress to systemic spread. Susceptibility studies suggest clofazimine as the drug of choice when treating this infection, and this case supports its use as empirical therapy for veterinarians treating this disease in this region while awaiting culture and sensitivity results.
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Affiliation(s)
- Hock Siew Han
- Veterinary Emergency and Specialty Hospital, Singapore
| | - Danièlle Gunn-Moore
- The Royal (Dick) School of Veterinary Studies and The Roslin Institute, The University of Edinburgh, Edinburgh, Midlothian, UK
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4
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Martín‐Ambrosio Francés M, Pradel J, Domínguez E, Sharman M. Clinical resolution of systemic mycobacterial infection in a cat with a suspected spinal granuloma. VETERINARY RECORD CASE REPORTS 2023. [DOI: 10.1002/vrc2.576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
| | - Julie Pradel
- Animal Health Trust Newmarket UK
- The Ralph (Veterinary Referral Centre) Marlow UK
| | | | - Mellora Sharman
- Animal Health Trust Newmarket UK
- VetCT Consultants in Telemedicine Cambridge UK
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5
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Development of an enzyme-linked immunosorbent assay for the diagnosis of feline tuberculosis. Vet Immunol Immunopathol 2023; 255:110538. [PMID: 36543013 DOI: 10.1016/j.vetimm.2022.110538] [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: 07/10/2022] [Revised: 12/09/2022] [Accepted: 12/15/2022] [Indexed: 12/23/2022]
Abstract
Cases of feline tuberculosis (TB) can be challenging to diagnose. Currently, this is achieved through a combination of mycobacterial culture, polymerase chain reaction (PCR), or interferon-gamma release assay (IGRA); however, these each have limitations. There is limited data regarding the use of humoral immunodiagnostics for TB in cats. Therefore, we sought to develop an enzyme-linked immunosorbent assay (ELISA) to further facilitate the diagnosis of feline TB. A comparative PPD (purified protein derivative) antibody ELISA was optimised for use on serum and plasma, and was tested against samples from 14 cats with culture-confirmed TB and 24 uninfected controls. Selection of an appropriate positive cut-off value based on receiver-operator characteristic curve analysis gave test sensitivity of 64.3 % and specificity of 100 %. When tested on further samples from cats with strongly suspected mycobacteriosis, 32.9 % (23/70) were antibody positive. Notably, positive results were recorded in cats that failed to respond to the IGRA, and in one PCR and IGRA negative cat. No positive responses were identified in cats with non-tuberculous mycobacterial infections, or with non-mycobacterial diseases (n = 12). Therefore, antibody-based diagnostics may be useful adjunctive tests for cases of TB missed by the IGRA, helping protect both feline and, in turn, human health.
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Webster J, Marchesi F, Gunn-Moore D, Haining H, Ridyard AE. Disseminated Mycobacterium avium infection in a cat on long-term ciclosporin therapy and potential latent infection of an in-contact cat. JFMS Open Rep 2022; 8:20551169221109442. [PMID: 35966901 PMCID: PMC9373128 DOI: 10.1177/20551169221109442] [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] [Indexed: 11/16/2022] Open
Abstract
Case summary An 8-year-old domestic shorthair cat receiving long-term ciclosporin treatment was evaluated for a history of weight loss and hyporexia. The main clinical finding was a cluster of enlarged mesenteric lymph nodes. Cytological examination of fine-needle aspirates showed granulomatous inflammation with abundant acid-fast bacilli. A diagnosis of Mycobacterium avium complex (MAC) infection was confirmed by PCR. The cat’s clinical condition deteriorated rapidly despite appropriate antibiotic treatment and it was euthanased 2 weeks after initial presentation due to development of severe paraparesis and ataxia. Post-mortem examination revealed granulomatous inflammation affecting multiple lymph nodes and other organs with intrahistiocytic acid-fast bacilli consistent with mycobacteria when stained using Ziehl–Neelsen stain. Another cat in the same household was screened for infection using the interferon gamma release assay (IGRA), with the result being consistent with infection by non-tuberculous mycobacteria (NTM), which includes MAC; however, it had no grossly detectable disease. Relevance and novel information This case report is an unusual presentation of disseminated MAC infection in a cat, which remains a rare diagnosis. Clinicians should be aware of unusual and rare presentations of this infection. The clinical findings, progression of disease and histopathology results add to the current clinical database for feline disseminated MAC infections. Another cat in the same household tested positive for NTM by IGRA without any gross disease. This was suggestive of latent MAC infection which, to our knowledge, has not been previously reported in an in-contact cat.
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Affiliation(s)
- Jade Webster
- Small Animal Hospital, University of Glasgow, Glasgow, UK
| | | | - Danièlle Gunn-Moore
- Royal (Dick) School of Veterinary Studies and The Roslin Institute, University of Edinburgh, Edinburgh, UK
| | - Hayley Haining
- Veterinary Diagnostic Services, University of Glasgow, Glasgow, UK
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Mitchell JL, MacDougall L, Dobromylskyj MJ, Smith K, Stavinohova R, Gunn-Moore DA, Hope JC, Scurrell E. Ocular mycobacterial lesions in cats. Vet Pathol 2022; 59:792-805. [PMID: 35587045 PMCID: PMC9358306 DOI: 10.1177/03009858221098431] [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] [Indexed: 11/16/2022]
Abstract
Ocular mycobacterial infections are an under-recognized cause of morbidity in the
domestic cat. This study aimed to explore the distribution, histopathological
appearance, and severity of feline ocular mycobacterial lesions, and to
characterize the immune cell population with immunohistochemistry. Routine
histological staining with hematoxylin and eosin, and Masson’s trichrome, was
performed to identify ocular lesions and assign an inflammation score based on
the number of cells present. Acid-fast bacilli were detected with Ziehl-Neelsen,
and immunohistochemistry for ionized calcium-binding adaptor protein-1 (Iba1),
calprotectin, cluster of differentiation 3 (CD3), and Pax5 was undertaken on
formalin-fixed paraffin-embedded tissue samples from 24 cases of ocular
mycobacteriosis. Posterior or panuveitis with concurrent retinitis was
identified in 20/24 cases (83%), with retinal detachment in 16/20 (80%) of these
cases. Choroidal lesions had the highest median inflammation score.
Ziehl-Neelsen-positive organisms were detected in 20/24 cases (83%), with the
highest prevalence of acid-fast bacilli detected in choroidal lesions (16/20,
80%). Lesions were typically granulomatous to pyogranulomatous, characterized by
abundant numbers of Iba1-positive macrophages, followed by calprotectin-positive
granulocytes and monocytes, fewer T cells, and rarer B cells. However, where
iritis was identified, inflammation was typically lymphoplasmacytic (11/16
cases, 69%). Where diagnostic testing was performed, tuberculosis (ie, infection
with Mycobacterium bovis, Mycobacterium
microti, or a nonspeciated Mycobacterium
tuberculosis-complex pathogen) was diagnosed in 20/22 cats (91%),
with Mycobacterium lepraemurium infection identified in the
other 2/22 cats (9%). These results suggest the choroid is the primary site of
lesion development in most cases of feline ocular mycobacteriosis, and
inflammatory changes are associated with the presence of mycobacteria localized
to ocular tissues.
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Affiliation(s)
| | | | | | - Ken Smith
- Royal Veterinary College, Hatfield, UK
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8
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Mitchell JL, Ganis L, Blacklock BT, Petrushkin H, Hope JC, Gunn-Moore DA. Ocular Tuberculosis: More than 'Of Mice and Men'. Ocul Immunol Inflamm 2022; 30:34-38. [PMID: 32946291 DOI: 10.1080/09273948.2020.1797116] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Tuberculosis (TB), caused by infection with members of the Mycobacterium tuberculosis-complex, is one of the oldest known infectious disease entities, resulting in the death of millions of humans each year. It also results in a substantial degree of morbidity and mortality in animal species. Extrapulmonary TB is well recognized in humans, and the eye is one site that can be affected. Studies seeking to understand ocular TB have often relied on animal models; however, these have their limitations and may not truly reflect what happens in humans. We wish to raise awareness among ophthalmologists and vision scientists of naturally occurring cases of ocular TB in animals, namely cattle and domestic cats, and the possibilities of gaining further understanding of this presentation of TB by adopting a collaborative approach. This will hopefully improve outcomes for both human and animal patients.
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Affiliation(s)
- Jordan L Mitchell
- Royal (Dick) School of Veterinary Studies and the Roslin Institute, The University of Edinburgh, Midlothian, UK
| | - Laura Ganis
- Barts Health NHS Trust, The Royal London Hospital, London, UK
| | - Benjamin T Blacklock
- Royal (Dick) School of Veterinary Studies and the Roslin Institute, The University of Edinburgh, Midlothian, UK
| | - Harry Petrushkin
- Moorfields Eye Hospital Foundation Trust, Uveitis and Scleritis Service, London, UK.,Rheumatology Department, Great Ormond Street Hospital, London, UK
| | - Jayne C Hope
- Royal (Dick) School of Veterinary Studies and the Roslin Institute, The University of Edinburgh, Midlothian, UK
| | - Danièlle A Gunn-Moore
- Royal (Dick) School of Veterinary Studies and the Roslin Institute, The University of Edinburgh, Midlothian, UK
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9
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Mitchell JL, Raper A, Gunn-Moore DA, Hope JC. Recognition of recombinant interferon-gamma from Felidae species by anti-cat antibodies. Vet Immunol Immunopathol 2021; 241:110327. [PMID: 34564047 DOI: 10.1016/j.vetimm.2021.110327] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 09/15/2021] [Accepted: 09/18/2021] [Indexed: 11/29/2022]
Abstract
Mycobacterial infections cause a reasonable burden of morbidity and mortality in global feline populations, many of which are 'Vulnerable' or 'Endangered'. Identifying these infections may facilitate efforts to protect these animals. An interferon-gamma (IFNγ) release assay (IGRA) to diagnose mycobacteriosis in domestic cats has been adapted for use in lions; however, the development of species-specific antibodies may be laborious. Therefore, we investigated whether anti-cat IFNγ antibodies can bind to recombinant IFNγ (rIFNγ) from other Felidae species, permitting use of the feline IGRA in a wider range of felids. Unique Felidae IFNγ protein sequences and their corresponding coding nucleotide sequence were identified from online databases; plasmids with an IFNγ-gene insert were synthesised to transform E. coli-DH5α and subsequently transfect HEK 293 T cells to secrete rIFNγ. Enzyme-linked immunosorbent assay using a commercial anti-cat IFNγ kit was performed to detect rIFNγ from Felidae, the domestic dog and cattle. Five unique rIFNγ Felidae proteins were synthesised; anti-cat IFNγ antibodies were able to bind to all five proteins, while cross-reactivity with canine and bovine rIFNγ was negligible. This suggests that anti-cat IFNγ antibodies are sufficient for detection of IFNγ across other Felidae species, namely the lion, tiger, cheetah, cougar, Iberian lynx and the Canadian lynx.
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Affiliation(s)
- Jordan L Mitchell
- The Royal (Dick) School of Veterinary Studies and The Roslin Institute, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, United Kingdom.
| | - Anna Raper
- The Royal (Dick) School of Veterinary Studies and The Roslin Institute, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, United Kingdom
| | - Danièlle A Gunn-Moore
- The Royal (Dick) School of Veterinary Studies and The Roslin Institute, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, United Kingdom
| | - Jayne C Hope
- The Royal (Dick) School of Veterinary Studies and The Roslin Institute, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, United Kingdom
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10
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Mitchell JL, Stanley P, McDonald K, Burr P, Rhodes SG, Gunn-Moore DA, Hope JC. Diagnostic accuracy of the interferon-gamma release assay (IGRA) for cases of feline mycobacteriosis. Prev Vet Med 2021; 193:105409. [PMID: 34126470 DOI: 10.1016/j.prevetmed.2021.105409] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 05/22/2021] [Accepted: 06/06/2021] [Indexed: 10/21/2022]
Abstract
The aim of this study was to evaluate the sensitivity and specificity of the interferon-gamma release assay (IGRA) for diagnosing infections with members of the Mycobacterium (M.) tuberculosis-complex (MTBC) and non-tuberculous mycobacteria (NTM) in domestic cats, and to generate defined feline-specific cut-off values using receiver operating characteristic (ROC) curve analysis to improve test performance. Records of 594 cats that had been tested by IGRA were explored to identify individuals that had a culture and/or polymerase chain reaction (PCR)-confirmed case of mycobacterial disease, and those that had a final diagnosis of non-mycobacterial disease. A total of 117 cats - 80 with mycobacterial disease and 37 diagnosed with a condition other than mycobacteriosis - were identified for further detailed analysis. This population was used to estimate test sensitivity and specificity, as well as likelihood ratios for the IGRA to correctly identify a cat with or without mycobacterial disease. Agreement between IGRA results and culture/PCR using current and proposed new cut-off values was also determined. ROC analysis of defined confirmed infected and non-mycobacterial disease control cats allowed an adjustment of current test cut-offs that increased the overall test sensitivity for MTBC infections from 83.1 % (95 % confidence interval [CI]: 71.5-90.5 %) to 90.2 % (95 % CI: 80.2-95.4%), and M. bovis infection from 43 % (95 % CI: 28.2-60.7%) to 68 % (95 % CI: 51.4-82.1%) while maintaining high test specificity (100 % in both cases). Overall agreement between IGRA results and culture/PCR, while recognising that neither culture nor PCR tests have perfect sensitivity, improved from weak (κ = 0.57) to moderate (κ = 0.71) using new proposed IGRA test cut-off values. Application of these results, based upon the statistical analysis of accumulated test data, can improve the diagnostic performance of the feline IGRA, particularly for identifying infections with M. bovis, without compromising specificity.
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Affiliation(s)
- Jordan L Mitchell
- The Royal (Dick) School of Veterinary Studies and The Roslin Institute, The University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, United Kingdom.
| | - Paul Stanley
- The Royal (Dick) School of Veterinary Studies and The Roslin Institute, The University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, United Kingdom
| | - Kieran McDonald
- Biobest Laboratories Ltd, 6 Charles Darwin House, Edinburgh Technopole, Milton Bridge, Near Penicuik, EH26 0PY, United Kingdom
| | - Paul Burr
- Biobest Laboratories Ltd, 6 Charles Darwin House, Edinburgh Technopole, Milton Bridge, Near Penicuik, EH26 0PY, United Kingdom
| | - Shelley G Rhodes
- Animal & Plant Health Agency, Woodham Lane, New Haw, Addlestone, Surrey, KT15 3NB, United Kingdom
| | - Danièlle A Gunn-Moore
- The Royal (Dick) School of Veterinary Studies and The Roslin Institute, The University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, United Kingdom
| | - Jayne C Hope
- The Royal (Dick) School of Veterinary Studies and The Roslin Institute, The University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, United Kingdom
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Michelet L, Richomme C, Réveillaud E, De Cruz K, Moyen JL, Boschiroli ML. Mycobacterium microti Infection in Red Foxes in France. Microorganisms 2021; 9:1257. [PMID: 34207760 PMCID: PMC8227042 DOI: 10.3390/microorganisms9061257] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 06/04/2021] [Accepted: 06/05/2021] [Indexed: 11/16/2022] Open
Abstract
Mycobacterium microti, member of the Mycobacterium tuberculosis, complex is known to interfere in the screening and diagnosis of bovine tuberculosis. This pathogen is increasingly detected in the frame of surveillance programs for tuberculosis in livestock and wildlife. Recently, red foxes (Vulpes vulpes) were found infected by Mycobacterium bovis in four French endemic areas. M. microti infection was concomitantly found during this investigation. Rates of infection by M. microti and M. bovis are not different except in one of the four areas (lower prevalence for M. microti in Charente). As for M. bovis infection, none of the infected foxes presented gross TB-like lesions. Infection of red foxes by M. microti seems to occur by ingestion of contaminated food, as mesenteric lymph nodes are mostly infected albeit no fecal excretion could be detected. Red foxes appear to be susceptible to Mycobacterium microti infection but seem to play a role of dead-end host for the transmission of this bacillus.
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Affiliation(s)
- Lorraine Michelet
- Paris-Est University, National Reference Laboratory for Tuberculosis, Animal Health Laboratory, Anses, 94700 Maisons-Alfort, France; (L.M.); (K.D.C.)
| | - Céline Richomme
- Anses, Nancy Laboratory for Rabies and Wildlife, 54220 Malzéville, France;
| | - Edouard Réveillaud
- Regional Directorate for Food, Agriculture and Forest of Nouvelle-Aquitaine, 87000 Limoges, France;
| | - Krystel De Cruz
- Paris-Est University, National Reference Laboratory for Tuberculosis, Animal Health Laboratory, Anses, 94700 Maisons-Alfort, France; (L.M.); (K.D.C.)
| | - Jean-Louis Moyen
- Laboratoire Départemental d’Analyse et de Recherche de la Dordogne, 24660 Coulounieix-Chamiers, France;
| | - Maria Laura Boschiroli
- Paris-Est University, National Reference Laboratory for Tuberculosis, Animal Health Laboratory, Anses, 94700 Maisons-Alfort, France; (L.M.); (K.D.C.)
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12
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Mitchell JL, Del Pozo J, Woolley CSC, Dheendsa R, Hope JC, Gunn-Moore DA. Histological and immunohistochemical features suggesting aetiological differences in lymph node and (muco)cutaneous feline tuberculosis lesions. J Small Anim Pract 2021; 63:174-187. [PMID: 34101189 DOI: 10.1111/jsap.13386] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 04/20/2021] [Accepted: 05/16/2021] [Indexed: 12/01/2022]
Abstract
OBJECTIVES To identify and describe histological and immunohistochemical criteria that may differentiate between skin and lymph node lesions associated with Mycobacterium (M.) bovis and M. microti in a diagnostic pathology setting. MATERIALS AND METHODS Archived skin and lymph node biopsies of tuberculous lesions were stained with haematoxylin and eosin, Ziehl-Neelsen and Masson's Trichrome. Immunohistochemistry was performed to detect the expression of calprotectin, CD3 and Pax5. Samples were scored for histological parameters (i.e. granulomas with central necrosis versus small granulomas without central necrosis, percentage necrosis and/or multinucleated giant cells), number of acid-fast bacilli (bacterial index) and lesion percentage of fibrosis and positive immunohistochemical staining. RESULTS Twenty-two samples were examined (M. bovis n=11, M. microti n=11). When controlling for age, gender and tissue, feline M. bovis-associated lesions more often featured large multi-layered granulomas with central necrosis. Conversely, this presentation was infrequent in feline M. microti-associated lesions, where small granulomas without central necrosis predominated. The presence of an outer fibrous capsule was variable in both groups, as was the bacterial index. There were no differences in intralesional expression of immunohistochemical markers. CLINICAL SIGNIFICANCE Differences in the histological appearance of skin and lymph node lesions may help to infer feline infection with either M. bovis or M. microti at an earlier stage when investigating these cases, informing clinicians of the potential zoonotic risk. Importantly, cases of tuberculosis can present with numerous acid-fast bacilli. This implies that a high bacterial index does not infer infection with non-zoonotic non-tuberculous mycobacteria.
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Affiliation(s)
- J L Mitchell
- *Royal (Dick) School of Veterinary Studies and The Roslin Institute, The University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
| | - J Del Pozo
- *Royal (Dick) School of Veterinary Studies and The Roslin Institute, The University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
| | - C S C Woolley
- *Royal (Dick) School of Veterinary Studies and The Roslin Institute, The University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
| | - R Dheendsa
- *Royal (Dick) School of Veterinary Studies and The Roslin Institute, The University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
| | - J C Hope
- *Royal (Dick) School of Veterinary Studies and The Roslin Institute, The University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
| | - D A Gunn-Moore
- *Royal (Dick) School of Veterinary Studies and The Roslin Institute, The University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
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Serial Interferon-Gamma Release Assay (IGRA) Testing to Monitor Treatment Responses in Cases of Feline Mycobacteriosis. Pathogens 2021; 10:pathogens10060657. [PMID: 34073615 PMCID: PMC8226617 DOI: 10.3390/pathogens10060657] [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: 05/05/2021] [Revised: 05/24/2021] [Accepted: 05/25/2021] [Indexed: 11/16/2022] Open
Abstract
The interferon-gamma release assay (IGRA) is used to diagnose cases of feline mycobacteriosis, but the use of serial testing to monitor treatment responses has not been evaluated in this species. From a population of cats that underwent IGRA testing for diagnostic investigation, individuals were identified with a pre- and end-of-treatment IGRA that passed control thresholds. The number of cats which reverted to negative at the end-of-treatment IGRA, changes in paired antigen-specific optical density (OD) values and differences in the pre-treatment antigen-specific OD values for those which underwent reversion were compared. Factors to explain reversion or recurrence of disease post-treatment were explored. Four of 18 cats (22%) reverted to negativity at the point of clinical resolution (p = 0.33), there was no difference in paired antigen-specific OD values (p ≥ 0.12), and cats that reverted did not have a lower baseline OD value (p = 0.63). No statistically significant factors were identified to predict reversion (p ≥ 0.08). Remaining positive at the end of treatment IGRA was not associated with recurrence of disease post-treatment (p = 0.34). Overall, these data suggest there is limited value in the use of the IGRA to monitor treatment responses in cats.
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Carrisoza-Urbina J, Bedolla-Alva MA, Juárez-Ramírez M, Gutiérrez-Pabello JA. Ocular tuberculosis in a calf. BMC Vet Res 2021; 17:187. [PMID: 33964902 PMCID: PMC8106168 DOI: 10.1186/s12917-021-02893-y] [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: 03/05/2021] [Accepted: 04/29/2021] [Indexed: 11/15/2022] Open
Abstract
Background Bovine tuberculosis is a chronic inflammatory disease that causes granuloma formation mainly in retropharyngeal, tracheobronchial, mediastinal lymph nodes and lungs of bovines. The presence of these lesions in other tissues such as the eyeball is very rare and difficult to diagnose. This study describes macroscopic and microscopic pathological findings in a calf with ocular and meningeal tuberculosis. Case presentation March 2019, an eight-month-old Holstein Friesian calf was identified in a dairy farm located in central Mexico with a clinical cough, anorexia, incoordination, corneal opacity and vision loss. At necropsy, pneumonia, lymphadenitis, meningitis, and granulomatous iridocyclitis were observed. The histopathological examination revealed granulomatous lesions in lung tissue, lymph nodes, meninges and eyes with the presence of acid-fast bacilli associated with Mycobacterium spp. Conclusion To the best of our knowledge, this is the first report that describes macroscopic and microscopic pathological findings of ocular tuberculosis in cattle. This report highlights the importance of considering bovine tuberculosis in the differential diagnosis of corneal opacity and loss of vision in cattle.
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Affiliation(s)
- Jacobo Carrisoza-Urbina
- Laboratorio de Investigación en Tuberculosis Bovina, Departamento de Microbiología e Inmunología, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Mexico city, Mexico
| | - Mario A Bedolla-Alva
- Departamento de Patología, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Mexico city, Mexico
| | - Mireya Juárez-Ramírez
- Departamento de Patología, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Mexico city, Mexico
| | - José A Gutiérrez-Pabello
- Laboratorio de Investigación en Tuberculosis Bovina, Departamento de Microbiología e Inmunología, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Mexico city, Mexico.
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15
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Manou M, Milgram J, Kelly P, Hoey S, Kenny K, Warde S, Kirby B. Mycobacterium bovis BCG Danish Strain 1331 isolated from a periarticular lesion in a domestic cat. J Small Anim Pract 2021; 62:924-928. [PMID: 33496016 DOI: 10.1111/jsap.13287] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 11/12/2020] [Accepted: 11/26/2020] [Indexed: 11/30/2022]
Abstract
A 7-year-old male neutered domestic shorthair outdoor cat was referred for chronic left forelimb lameness, which had been treated with intra-articular injections of triamcinolone acetonide. A soft tissue swelling around the elbow joint, extending from the distal humerus to the proximal ulna, was surgically explored and biopsy samples obtained. Mycobacterium bovis was cultured from samples from the soft tissue and bone. The mycobacteria from the media were killed and the DNA extracted and tested on a multiplex real-time PCR for the absence of specific genes and the presence of mycobacterial genus markers. The PCR revealed bacillus Calmette-Guérin Danish Strain 1331; this was also isolated from the prescapular lymph node, muscle and bone, obtained at post mortem examination. Badgers had been vaccinated with the bacillus Calmette-Guérin vaccine SSI (Statens Serum Institute) in the area where the cat lived, in the spring and autumn of the previous year. To the authors' knowledge, this is the first report of infection with M. bovis bacillus Calmette-Guérin Danish Strain 1331 in a domestic cat, potentially associated with annual vaccination of badgers in the proximity of the cat's home.
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Affiliation(s)
- M Manou
- University College Dublin, University Veterinary Hospital, Belfield, Dublin 4, Ireland
| | - J Milgram
- The Hebrew University of Jerusalem, Koret School of Veterinary Medicine, P.O. Box 12, Rehovot, Israel
| | - P Kelly
- University College Dublin, University Veterinary Hospital, Belfield, Dublin 4, Ireland
| | - S Hoey
- University College Dublin, University Veterinary Hospital, Belfield, Dublin 4, Ireland
| | - K Kenny
- Department of Agriculture, Food and Marine, Co, Kildare, Ireland
| | - S Warde
- Department of Agriculture, Food and Marine, Co, Kildare, Ireland
| | - B Kirby
- University College Dublin, University Veterinary Hospital, Belfield, Dublin 4, Ireland
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Albuquerque CSC, Černá P, Gunn-Moore DA. Repeated bouts of pulmonary tuberculosis in a hunting cat: reinfection or recrudescence? JFMS Open Rep 2021; 7:2055116921990292. [PMID: 33953934 PMCID: PMC8044568 DOI: 10.1177/2055116921990292] [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] [Indexed: 11/29/2022] Open
Abstract
CASE SUMMARY A 7-year-old neutered male Siamese cat was referred for investigation of weight loss and hypercalcaemia (3.3 mmol/l; reference interval 2-3 mmol/l). Haematology, serum biochemistry, thoracic imaging, bronchoalveolar lavage (BAL), Ziehl-Neelsen staining of the BAL fluid and interferon gamma release assay (IGRA) were compatible with pneumonia caused by the less pathogenic member of the Mycobacterium tuberculosis complex, that is, M microti (the 'vole bacillus'), which is common in cats in the UK. Treatment with azithromycin, rifampicin and marbofloxacin was given for 2 months, followed by 4 months of azithromycin and marbofloxacin. Treatment recommendations for tuberculous pneumonia have since changed. The cat remained asymptomatic for 1 year but went on to develop M microti pneumonia on five other occasions, and was treated for 6-12 months on each occasion. The patient's clinical signs, hypercalcaemia and radiographic/CT pulmonary pathology always resolved completely, and the IGRA became negative, before antimycobacterial treatment was stopped. This suggests cure followed by reinfection owing to avid hunting behaviour. Alternatively, this could represent recrudescence of dormant disease. This case has previously been included in a study that described a series of cases of feline tuberculosis. RELEVANCE AND NOVEL INFORMATION This case shows that M microti infection in cats can present as recurrent episodes of pneumonia, even after prolonged treatment courses.
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Affiliation(s)
- Carolina SC Albuquerque
- Royal (Dick) School of Veterinary Studies and The Roslin Institute, University of Edinburgh, Easter Bush Campus, Roslin, UK
| | - Petra Černá
- Department of Clinical Sciences, Colorado State University, Fort Collins, CO, USA
| | - Danièlle A Gunn-Moore
- Royal (Dick) School of Veterinary Studies and The Roslin Institute, University of Edinburgh, Easter Bush Campus, Roslin, UK
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17
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Mycobacterium microti pulmonary infection with vertebrodiscitis and a psoas abscess. CLINICAL INFECTION IN PRACTICE 2021. [DOI: 10.1016/j.clinpr.2021.100064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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18
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Munro MJL, Byrne BA, Sykes JE. Feline mycobacterial disease in northern California: Epidemiology, clinical features, and antimicrobial susceptibility. J Vet Intern Med 2020; 35:273-283. [PMID: 33346952 PMCID: PMC7848370 DOI: 10.1111/jvim.16013] [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: 07/08/2020] [Revised: 12/06/2020] [Accepted: 12/07/2020] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Mycobacterial infections in cats are challenging to treat and incompletely described. HYPOTHESIS/OBJECTIVES To describe the features of mycobacterial infections in cats from northern California. ANIMALS Nineteen cats, all with nontuberculous mycobacterial (NTM) infections; 4 with Mycobacterium avium infection, 15 with rapid-growing mycobacterial (RGM) infection. METHODS Retrospective study. Cases with positive mycobacterial culture, species identification, and susceptibility testing were included. Descriptive statistics were used. Fisher's exact test and Mann-Whitney U test were used for comparisons between M avium and RGM infections (P ≤ .05). RESULTS Rapid-growing mycobacterial cases included Mycobacterium smegmatis (9), Mycobacterium fortuitum (4), Mycobacterium abscessus (1), and Mycobacterium thermoresistibile (1). Mycobacterium avium infections were more likely than RGM infections to be disseminated (3/4 vs 0/15; P = .004). Disease of the skin/subcutis (15/15 vs 0/4; P < .001) and outdoor access (14/15 vs 0/4; P = .001) were primary features of RGM infections. Resistance to fluoroquinolones and aminoglycosides was common among M avium isolates. A high prevalence of resistance to third- and fourth-generation cephalosporins was noted in RGM species. Death/euthanasia was noted only in M avium cases (3/4). Twelve of 15 cats with RGM infection had available follow-up; 4 of these cats achieved remission. CONCLUSIONS AND CLINICAL IMPORTANCE The most prevalent RGM species isolated from cats from northern California are M smegmatis and M fortuitum. Susceptibility to prescribed antimicrobials does not appear to guarantee treatment success. Combination drug treatment is recommended. Repeat culture and susceptibility testing should be performed when disease is persistent/relapsing.
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Affiliation(s)
- Matthew J L Munro
- Veterinary Medical Teaching Hospital, School of Veterinary Medicine, University of California, Davis, Davis, California, USA.,Department of Veterinary Clinical Sciences, The Melbourne Veterinary School, University of Melbourne, Werribee, Victoria, Australia
| | - Barbara A Byrne
- Department of Pathology, Microbiology, and Immunology, School of Veterinary Medicine, University of California, Davis, Davis, California, USA
| | - Jane E Sykes
- Veterinary Medical Teaching Hospital, School of Veterinary Medicine, University of California, Davis, Davis, California, USA.,Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California, Davis, Davis, California, USA
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Peterhans S, Landolt P, Friedel U, Oberhänsli F, Dennler M, Willi B, Senn M, Hinden S, Kull K, Kipar A, Stephan R, Ghielmetti G. Mycobacterium microti: Not Just a Coincidental Pathogen for Cats. Front Vet Sci 2020; 7:590037. [PMID: 33344530 PMCID: PMC7744565 DOI: 10.3389/fvets.2020.590037] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Accepted: 11/09/2020] [Indexed: 12/14/2022] Open
Abstract
Public interest in animal tuberculosis is mainly focused on prevention and eradication of bovine tuberculosis in cattle and wildlife. In cattle, immunodiagnostic tests such as the tuberculin skin test or the interferon gamma (IFN-γ) assay have been established and are commercially available. Feline tuberculosis is rather unknown, and the available diagnostic tools are limited. However, infections with Mycobacterium tuberculosis complex members need to be considered an aetiological differential diagnosis in cats with granulomatous lymphadenopathy or skin nodules and, due to the zoonotic potential, a time-efficient and accurate diagnostic approach is required. The present study describes 11 independent cases of Mycobacterium microti infection in domestic cats in Switzerland. For three cases, clinical presentation, diagnostic imaging, bacteriological results, immunodiagnostic testing, and pathological features are reported. An adapted feline IFN-γ release assay was successfully applied in two cases and appears to be a promising tool for the ante mortem diagnosis of tuberculosis in cats. Direct contact with M. microti reservoir hosts was suspected to be the origin of infection in all three cases. However, there was no evidence of M. microti infection in 346 trapped wild mice from a presumptive endemic region. Therefore, the source and modalities of infection in cats in Switzerland remain to be further elucidated.
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Affiliation(s)
- Sophie Peterhans
- Section of Veterinary Bacteriology, Vetsuisse Faculty, Institute for Food Safety and Hygiene, University of Zurich, Zurich, Switzerland
| | - Patricia Landolt
- Section of Veterinary Bacteriology, Vetsuisse Faculty, Institute for Food Safety and Hygiene, University of Zurich, Zurich, Switzerland
| | - Ute Friedel
- Section of Veterinary Bacteriology, Vetsuisse Faculty, Institute for Food Safety and Hygiene, University of Zurich, Zurich, Switzerland
| | | | - Matthias Dennler
- Clinic for Diagnostic Imaging, Department of Clinical Diagnostics and Services, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
| | - Barbara Willi
- Clinic for Small Animal Internal Medicine, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
| | | | | | - Karin Kull
- Dres. Kull, Gross- und Kleintierpraxis, Ernen, Switzerland
| | - Anja Kipar
- Vetsuisse Faculty, Institute of Veterinary Pathology, University of Zurich, Zurich, Switzerland
| | - Roger Stephan
- Section of Veterinary Bacteriology, Vetsuisse Faculty, Institute for Food Safety and Hygiene, University of Zurich, Zurich, Switzerland
| | - Giovanni Ghielmetti
- Section of Veterinary Bacteriology, Vetsuisse Faculty, Institute for Food Safety and Hygiene, University of Zurich, Zurich, Switzerland
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20
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Černá P, L. Mitchell J, Lodzinska J, Cazzini P, Varjonen K, Gunn-Moore DA. Systemic Mycobacterium kansasii Infection in Two Related Cats. Pathogens 2020; 9:E959. [PMID: 33218094 PMCID: PMC7698836 DOI: 10.3390/pathogens9110959] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 11/13/2020] [Accepted: 11/16/2020] [Indexed: 12/31/2022] Open
Abstract
Mycobacterial infections are a major concern in veterinary medicine because of the difficulty achieving an etiological diagnosis, the challenges and concerns of treatment, and the potential zoonotic risk. Mycobacterium kansasii, a slow-growing non-tuberculous mycobacteria, causes disease in both humans and animals. While infections have been well described in humans, where it may be misdiagnosed as tuberculosis, there are fewer reports in animals. Only four cases have been reported in the domestic cat. This case report describes systemic M. kansasii infection in two sibling indoor-only cats that presented two and half years apart with cutaneous disease that was found to be associated with osteolytic and pulmonary pathology. Infection with M. kansasii was confirmed in both cats by polymerase chain reaction on fine-needle aspirate of a lumbosacral soft tissue mass in one cat and on a tissue punch biopsy of a skin lesion in the other; interferon-gamma release assay inferred M. avium-complex and M. tuberculosis-complex infection in the two cats, respectively. Both patients made a full recovery following antimicrobial therapy with rifampicin, azithromycin, and pradofloxacin (plus N-acetyl cysteine in cat 2). This report highlights successful treatment of systemic M. kansasii mycobacteriosis in the cat and the challenge of accurately diagnosing this infection.
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Affiliation(s)
- Petra Černá
- Department of Clinical Sciences, Colorado State University, Fort Collins, Colorado, CO 80528, USA;
- The University of Veterinary and Pharmaceutical Sciences Brno, 612 42 Brno, Czech Republic
| | - Jordan L. Mitchell
- The Royal (Dick) School of Veterinary Studies and The Roslin Institute, Easter Bush Campus, University of Edinburgh, Midlothian EH25 9RG, UK; (J.L.); (P.C.); (D.A.G.-M.)
| | - Joanna Lodzinska
- The Royal (Dick) School of Veterinary Studies and The Roslin Institute, Easter Bush Campus, University of Edinburgh, Midlothian EH25 9RG, UK; (J.L.); (P.C.); (D.A.G.-M.)
| | - Paola Cazzini
- The Royal (Dick) School of Veterinary Studies and The Roslin Institute, Easter Bush Campus, University of Edinburgh, Midlothian EH25 9RG, UK; (J.L.); (P.C.); (D.A.G.-M.)
| | - Katarina Varjonen
- AniCura Djursjukhuset Albano, Rinkebyvägen 21A, 182 36 Danderyd, Sweden;
| | - Danièlle A. Gunn-Moore
- The Royal (Dick) School of Veterinary Studies and The Roslin Institute, Easter Bush Campus, University of Edinburgh, Midlothian EH25 9RG, UK; (J.L.); (P.C.); (D.A.G.-M.)
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21
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O'Halloran C, Tørnqvist-Johnsen C, Woods G, Mitchell J, Reed N, Burr P, Gascoyne-Binzi D, Wegg M, Beardall S, Hope J, Gunn-Moore D. Feline tuberculosis caused by Mycobacterium bovis infection of domestic UK cats associated with feeding a commercial raw food diet. Transbound Emerg Dis 2020; 68:2308-2320. [PMID: 33091235 DOI: 10.1111/tbed.13889] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 09/22/2020] [Accepted: 10/18/2020] [Indexed: 02/06/2023]
Abstract
Mycobacterium (M.) bovis can infect cats and is a demonstrated zoonosis. We describe an outbreak of M. bovis in pet cats across England and Scotland associated with feeding a commercial raw food diet. Forty-seven cats presented with (pyo)granulomatous lesions, lymphadenopathy, pulmonary and/or alimentary disease over a one-year period where M. bovis infection was suspected or definitively diagnosed, and the cats all consumed the same specific brand of commercial raw venison pet food. Infection with M. bovis genotype 10:a was confirmed by culture and DNA typing of isolates in a small number of cases (n = 5); PCR was used in combination with or as an alternative to culture (n = 12) and/or infection with a Mycobacterium tuberculosis complex group organism was strongly suggested by positive responses to an interferon-gamma release assay (IGRA; n = 34). Asymptomatic at-risk cats were screened by IGRA, identifying a further 83 infected cats. The five culture-positive cases were distributed across areas of England and Scotland at low risk of endemic bovine tuberculosis. Investigations revealed affected cats were mainly indoor-only, and had been fed the same commercial raw food as at least part of their diet. This diet was recalled by the manufacturer due to failure of statutory meat inspection of the component venison. As far as possible, other sources of infection were explored and excluded, including wildlife contact, access to raw milk and living with people with active M. bovis infection. Four owners and one veterinary surgeon were found to have high likelihood of latent tuberculosis infection. One owner required treatment. Although it was not possible to conclusively demonstrate a zoonotic origin for these infections, neither was it possible to eliminate the possibility. Our results provide compelling evidence that the commercial raw diet of these cats was the likely route of M. bovis infection in this outbreak of cases.
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Affiliation(s)
- Conor O'Halloran
- Royal (Dick) School of Veterinary Studies and The Roslin Institute, University of Edinburgh, Edinburgh, UK
| | - Camilla Tørnqvist-Johnsen
- Royal (Dick) School of Veterinary Studies and The Roslin Institute, University of Edinburgh, Edinburgh, UK
| | - Glynn Woods
- Royal (Dick) School of Veterinary Studies and The Roslin Institute, University of Edinburgh, Edinburgh, UK
| | - Jordan Mitchell
- Royal (Dick) School of Veterinary Studies and The Roslin Institute, University of Edinburgh, Edinburgh, UK
| | - Nicki Reed
- Veterinary Specialists Scotland, Livingston, UK
| | | | | | | | | | - Jayne Hope
- Royal (Dick) School of Veterinary Studies and The Roslin Institute, University of Edinburgh, Edinburgh, UK
| | - Danièlle Gunn-Moore
- Royal (Dick) School of Veterinary Studies and The Roslin Institute, University of Edinburgh, Edinburgh, UK
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22
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Michelet L, Boschiroli ML. Mycobacterium uberis Infection in the Subcutaneous Tissue of the Radius/Ulna Area of a Cow. Microorganisms 2020; 8:E1701. [PMID: 33143390 PMCID: PMC7692660 DOI: 10.3390/microorganisms8111701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Revised: 10/29/2020] [Accepted: 10/30/2020] [Indexed: 11/18/2022] Open
Abstract
Mycobacterium uberis (M. uberis) is a recently described non-tuberculous mycobacterium phylogenetically close to Mycobacterium leprae (M. leprae) and Mycobacterium lepromatosis (M. lepromatosis). This pathogen classically causes nodular thelitis in cattle and goats. Here, we discuss what seems to be the first described case of M. uberis infection in a novel anatomical site, in the proximal or distal position (information not available) of the radius/ulna area of a cow. As this case was discovered in the framework of bovine tuberculosis (bTB) surveillance program in France, this type of infection could interfere with the screening and diagnostic tools employed for bTB.
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Affiliation(s)
- Lorraine Michelet
- Laboratory for Animal Health, Tuberculosis National Reference Laboratory, ANSES, University Paris-Est, 94700 Maisons-Alfort, France;
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23
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Paharsingh I, Suepaul R, Gyan L, Hosein A, Pargass I. Disseminated Mycobacterium avium subsp. hominissuis infection and ascites in an FIV-positive cat. Vet Clin Pathol 2020; 49:465-469. [PMID: 32966658 DOI: 10.1111/vcp.12897] [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: 12/05/2019] [Revised: 02/07/2020] [Accepted: 02/10/2020] [Indexed: 11/29/2022]
Abstract
A domestic shorthair cat was presented to the Veterinary Teaching Hospital at The University of the West Indies with a history of anorexia, ataxia, and lethargy. On physical examination, moderate abdominal distension and a palpable abdominal fluid wave were noted. Dark yellow, cloudy fluid was collected via abdominocentesis. Fluid analysis indicated that the effusion was a transudate containing low numbers of macrophages and occasional neutrophils. Some of the macrophages contained rod-shaped nonstaining structures of variable length (2-4 um). These structures were also seen extracellularly in low numbers. The morphology of the structures was suggestive of Mycobacterium. The cat's condition continued to deteriorate, and it died within a few hours of being admitted. Further diagnostic tests revealed feline immunodeficiency virus (FIV) infection with concurrent Mycobacterium avium subsp hominissuis infection. To the authors' knowledge, this is the first reported case of nontubercular mycobacterial-related ascites in a cat.
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Affiliation(s)
- India Paharsingh
- School of Veterinary Medicine, Faculty of Medical Sciences, The University of the West Indies, Champs Fleurs, Trinidad and Tobago
| | - Rod Suepaul
- School of Veterinary Medicine, Faculty of Medical Sciences, The University of the West Indies, Champs Fleurs, Trinidad and Tobago
| | - Lana Gyan
- Veterinary Diagnostic Laboratory, Ministry of Agriculture, Land and Fisheries, Champs Fleurs, Trinidad and Tobago
| | - Ansarah Hosein
- School of Veterinary Medicine, Faculty of Medical Sciences, The University of the West Indies, Champs Fleurs, Trinidad and Tobago
| | - Indira Pargass
- School of Veterinary Medicine, Faculty of Medical Sciences, The University of the West Indies, Champs Fleurs, Trinidad and Tobago
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Johnson LR, Vidal SA, Brust KD, Keel MK, Steffey MA. Facial distortion due to chronic inflammation of unknown cause in a cat. JFMS Open Rep 2020; 6:2055116920957200. [PMID: 32983553 PMCID: PMC7498973 DOI: 10.1177/2055116920957200] [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] [Indexed: 11/17/2022] Open
Abstract
Case summary An 8-year-old neutered male indoor cat was presented for evaluation of a year-long
history of swelling over the bridge of the nose that extended from the subcutaneous
tissue of the right upper eyelid to the dorsum of the skull. Intermittent regression of
the mass lesion was reported with antibiotic or corticosteroid therapy; however,
progressive swelling, malaise and hiding behavior persisted. CT revealed an aggressive
osteolytic mass lesion in the right and left nasal cavities and extending into the
frontal sinuses. Rhinoscopy using a 2.8 mm rigid telescope revealed somewhat
normal-appearing turbinates rostrally and ventrally on the left side, with turbinate
destruction on the right. After obtaining a biopsy from the right side of the nasal
cavity, thick material filling the entire nasal cavity was visible caudally and was
extracted endoscopically from a rostral approach. Surgical biopsy of the dorsal nasal
bridge resulted in protrusion of inspissated material from the incision site.
Rhinoscopic exploration revealed that the material extended into both frontal sinuses.
Following extensive debridement and medical therapy, marked resolution of facial
asymmetry was achieved. Relevance and novel information Facial distortion is often considered suggestive of a neoplastic process; however, it
can also be seen with fungal and mycobacterial infections, and, in this case, an
inflammatory condition of unknown etiology. In this cat, aggressive intervention and
debridement of necrotic debris resulted in substantial bony remodeling of the skull and
return to normal activity levels.
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Affiliation(s)
- Lynelle R Johnson
- Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California-Davis, Davis, CA, USA
| | - Sarah A Vidal
- William R Pritchard Veterinary Medical Teaching Hospital, Davis, CA, USA
| | - Kelsey D Brust
- William R Pritchard Veterinary Medical Teaching Hospital, Davis, CA, USA
| | - M Kevin Keel
- Department of Pathology, Microbiology and Immunology, School of Veterinary Medicine, University of California-Davis, Davis, CA, USA
| | - Michele A Steffey
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California-Davis, Davis, CA, USA
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25
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O'Connor CM, Abid M, Walsh AL, Behbod B, Roberts T, Booth LV, Thomas HL, Smith NH, Palkopoulou E, Dale J, Nunez-Garcia J, Morgan D. Cat-to-Human Transmission of Mycobacterium bovis, United Kingdom. Emerg Infect Dis 2020; 25:2284-2286. [PMID: 31742516 PMCID: PMC6874266 DOI: 10.3201/eid2512.190012] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Human infection with Mycobacterium bovis is reported infrequently in the United Kingdom. Most cases involve previous consumption of unpasteurized milk. We report a rare occurrence of 2 incidents of cat-to-human transmission of M. bovis during a cluster of infection in cats.
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Dibaj R, Shojaei H, Narimani T. Identification and molecular characterization of mycobacteria isolated from animal sources in a developing country. Acta Trop 2020; 204:105297. [PMID: 31837313 DOI: 10.1016/j.actatropica.2019.105297] [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: 07/01/2019] [Revised: 10/07/2019] [Accepted: 12/10/2019] [Indexed: 01/15/2023]
Abstract
The essential role of animals in the transmission of infectious diseases has long been recognized. Apart from zoonosis due to Mycobacterium bovis in domestic cattle, acquired mycobacterial zoonosis from animals are vastly under-reported worldwide. This is partly the result of not recognizing that animals can be the source of zoonotic nontuberculous mycobacteria (NTM) infection. The present study intended to be a contribution to the knowledge of somewhat neglected role of animals in harboring, maintenance and dissemination of NTM in the environment. A total of 326 samples from 250 animals were collected and analyzed for the presence of mycobacteria using standard protocols. The preliminary identification and Runyon's classification of isolates were performed by conventional tests. The PCR amplification of a 228 bp fragment of 65-kDa heat shock protein (hsp) gene was applied for the genus identification and the partial sequence analysis of 16S rRNA was applied for the species identification. In total 32 isolates including 26 rapidly growing and 6 slowly growing mycobacteria were recovered from 250 animal samples (12.8%). The isolates recovered from 21 (65.60%) fish, 8 (25%) insects and 3 (9.4%) house cats, dogs and mice. M. fortuitum was the most frequent Mycobacterium spp (13 isolates; 40.6% of all isolates), followed by M. abscessus-chelonae-M. saopaulense group, (5 isolates; 15.6% of all isolates), M. iranicum (3 isolates; 9.4% of all isolates),and M. marinum, M. terrae complex and M. chlorophenolicum (2 isolates each; 18.8% of all isolates), and the single isolates of M. mucogenicum, M. neoaurum, M. conceptionense, M. virginiense, and M. gordonae (5 isolates; 15.6% of all isolates). The current study indicates that a variety of animals can be a permanent or transient source of mycobacterial agents. This ensures the life cycle of the bacteria and the chance of their survival in the environment, which may pose a potential threat to human health.
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Mitchell J, Gunn-Moore D, Burr P. Feline mycobacterial infections. Vet Rec 2019; 185:347-348. [DOI: 10.1136/vr.l5594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Jordan Mitchell
- Royal (Dick) School of Veterinary Studies and The Roslin Institute, University of Edinburgh; Easter Bush Midlothian EH25 9RG
| | - Danielle Gunn-Moore
- Royal (Dick) School of Veterinary Studies and The Roslin Institute, University of Edinburgh; Easter Bush Midlothian EH25 9RG
| | - Paul Burr
- Biobest Laboratories; 6 Charles Darwin House, The Edinburgh Technopole, Milton Bridge, Penicuik Midlothian EH26 0PY
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O’Halloran C, Ioannidi O, Reed N, Murtagh K, Dettemering E, Van Poucke S, Gale J, Vickers J, Burr P, Gascoyne-Binzi D, Howe R, Dobromylskyj M, Mitchell J, Hope J, Gunn-Moore D. Tuberculosis due to Mycobacterium bovis in pet cats associated with feeding a commercial raw food diet. J Feline Med Surg 2019; 21:667-681. [PMID: 31082328 PMCID: PMC10814295 DOI: 10.1177/1098612x19848455] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
OBJECTIVES Mycobacterium bovis, a member of the Mycobacterium tuberculosis complex, can infect cats and has proven zoonotic risks for owners. Infected cats typically present with a history of outdoor lifestyle and hunting behaviour, and cutaneous granulomas are most commonly observed. The aim of this study is to describe an outbreak of tuberculous disease commencing with six young cats, living exclusively indoors in five different households across England, being presented to separate veterinarians across the UK with a variety of clinical signs. METHODS Investigations into the pyogranulomatous lesions, lymphadenopathy and/or pulmonary disease of these cases consistently identified infection with M bovis. Infection was confirmed by PCR, where possible, or was indicated with a positive interferon-gamma release assay (IGRA), where material for PCR was unavailable. In-contact, cohabiting cats were screened by IGRA and follow-up testing was undertaken/advised where results were positive. A lifestyle investigation was undertaken to identify the source of infection. RESULTS Six clinically sick cats and seven in-contact cats were identified with evidence of M bovis infection. Five clinical cases were either too sick to treat or deteriorated despite therapy, giving a mortality rate of 83%. Lifestyle investigations revealed the common factors between clusters to be that affected cats had mycobacterial infections speciated to M bovis, were exclusively indoor cats and were fed a commercially available raw food product produced by a single manufacturer. The Food Standards Agency, Animal & Plant Health Agency, Public Health England and the food manufacturer concerned have been notified/informed. Other possible sources of exposure for these cats to M bovis were explored and were excluded, including wildlife contact, access to raw milk, the presence of rodent populations inside the buildings in which the cats lived and exposure to known infectious humans. CONCLUSIONS AND RELEVANCE Upon investigations, our results provide compelling, if circumstantial, evidence of an association between the commercial raw diet of these cats and their M bovis infections.
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Affiliation(s)
- Conor O’Halloran
- Royal (Dick) School of Veterinary Studies and The Roslin Institute, University of Edinburgh, Edinburgh, UK
| | | | | | - Kevin Murtagh
- Anderson Moores Veterinary Specialists, Winchester, UK
| | | | | | | | | | | | | | | | | | - Jordan Mitchell
- Royal (Dick) School of Veterinary Studies and The Roslin Institute, University of Edinburgh, Edinburgh, UK
| | - Jayne Hope
- Royal (Dick) School of Veterinary Studies and The Roslin Institute, University of Edinburgh, Edinburgh, UK
| | - Danièlle Gunn-Moore
- Royal (Dick) School of Veterinary Studies and The Roslin Institute, University of Edinburgh, Edinburgh, UK
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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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Stavinohova R, O'Halloran C, Newton JR, Oliver JAC, Scurrell E, Gunn-Moore DA. Feline Ocular Mycobacteriosis: Clinical Presentation, Histopathological Features, and Outcome. Vet Pathol 2019; 56:749-760. [PMID: 31132943 DOI: 10.1177/0300985819844819] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This study describes clinical and histopathological features, treatment, and outcome of cats diagnosed with ocular mycobacteriosis. Cases diagnosed from 2012 to 2017 were reviewed for (a) histopathological evidence of ocular (pyo)granulomatous inflammation containing acid-fast bacilli with mycobacterial morphology, (b) positive mycobacterial culture and/or mycobacterial DNA identified by polymerase chain reaction of ocular tissue, or (c) presumed mycobacteriosis based on ophthalmic examination and positive interferon-gamma release assay. Twenty-five cats (31 eyes) were included; 14 cats (17/31 eyes, 55%) were blind at presentation (unilateral: n = 12 cats; bilateral: n = 2 cats); one unilaterally affected cat later became bilaterally blind. Another 5 cats (7/31 eyes, 23%) became blind after initially being bilaterally visual (unilateral: n = 3 cats; bilateral: n = 2 cats). The commonest ocular finding was uveitis (87%). The main histopathological features were granulomatous to pyogranulomatous chorioretinitis with retinal detachment, anterior uveitis, optic neuritis, episcleritis, scleritis, and/or retrobulbar cellulitis. Nineteen cats (76%) had systemic signs, with disseminated disease being diagnosed in 9, defined by interstitial pulmonary disease, generalized lymphadenopathy, and/or nonocular infection. Nine cats were diagnosed with Mycobacterium bovis, 2 with Mycobacterium microti, 1 with Mycobacterium tuberculosis complex, and 1 with Mycobacterium avium-intracellulare complex. The infecting species was unknown in the remaining cats. Combined surgery (enucleation: n = 5 cats; biopsy: n = 3 cats) and systemic treatment with 2 or 3 appropriate antibiotics for 2 to 7 months resulted in remission in 8 of the 10 cats treated; however, the cat treated with dual therapy relapsed after 8 months. A total of 16 cats (64%) were euthanized; 2 were lost to follow-up.
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Affiliation(s)
- Renata Stavinohova
- 1 Unit of Comparative Ophthalmology, Centre for Small Animal Studies, Animal Health Trust, Kentford, Newmarket, UK
| | - Conor O'Halloran
- 2 The Royal (Dick) School of Veterinary Studies and The Roslin Institute, University of Edinburgh, Midlothian, UK
| | - Jonathan Richard Newton
- 3 Epidemiology and Disease Surveillance Department, Centre for Preventive Medicine, Animal Health Trust, Kentford, Newmarket, UK
| | - James Andrew Clive Oliver
- 1 Unit of Comparative Ophthalmology, Centre for Small Animal Studies, Animal Health Trust, Kentford, Newmarket, UK
| | | | - Danièlle Audry Gunn-Moore
- 2 The Royal (Dick) School of Veterinary Studies and The Roslin Institute, University of Edinburgh, Midlothian, UK
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31
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O'Halloran C, McCulloch L, Rentoul L, Alexander J, Hope JC, Gunn-Moore DA. Cytokine and Chemokine Concentrations as Biomarkers of Feline Mycobacteriosis. Sci Rep 2018; 8:17314. [PMID: 30470763 PMCID: PMC6251861 DOI: 10.1038/s41598-018-35571-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Accepted: 11/02/2018] [Indexed: 12/16/2022] Open
Abstract
Mycobacteriosis is an emerging zoonotic disease of domestic cats and timely, accurate diagnosis is currently challenging. To identify differential cytokine/chemokine concentrations in serum/plasma of cats, which could be diagnostic biomarkers of infection we analysed plasma/serum from 116 mycobacteria-infected cats, 16 healthy controls and six cats hospitalised for unrelated reasons was analysed using the Milliplex MAP Feline Cytokine Magnetic Bead multiplex assay. Three cytokines; sFAS, IL-13 and IL-4 were reduced while seven; GM-CSF, IL-2, PDGF-BB, IL-8, KC, RANTES and TNF-α were elevated in mycobacteria-infected cats compared to healthy controls. However, IL-8 and KC concentrations were not significantly different from cats hospitalised for other reasons. Elevations in TNF-α and PDGF-BB may have potential to identify M. bovis and M. microti infected cats specifically while GM-CSF, IL-2 and FLT3L were increased in MTBC infected cats. This study demonstrates potential use of feline tuberculosis as a spontaneously occurring model of this significant human disease. Cytokine profiling has clear diagnostic potential for mycobacteriosis of cats and could be used discriminate tuberculous from non-tuberculous disease to rapidly inform on zoonotic risk. Future work should focus on the in-field utility of these findings to establish diagnostic sensitivity and specificity of these markers.
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Affiliation(s)
- C O'Halloran
- Royal (Dick) School of Veterinary Studies and The Roslin Institute, University of Edinburgh, Easter Bush Campus, Edinburgh, Scotland, EH25 9RG, UK. conor.o'
| | - L McCulloch
- UK Dementia Research Institute, Edinburgh Medical School, University of Edinburgh, Edinburgh, Scotland, EH16 4SB, UK
| | - L Rentoul
- MilliporeSigma (a Division of Merck KGaA, Darmstadt, Germany), 3050, Spruce Street, St. Louis, MO, USA
| | - J Alexander
- Waltham Centre for Pet Nutrition, Leicestershire, UK
| | - J C Hope
- Royal (Dick) School of Veterinary Studies and The Roslin Institute, University of Edinburgh, Easter Bush Campus, Edinburgh, Scotland, EH25 9RG, UK
| | - D A Gunn-Moore
- Royal (Dick) School of Veterinary Studies and The Roslin Institute, University of Edinburgh, Easter Bush Campus, Edinburgh, Scotland, EH25 9RG, UK
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Černá P, O'Halloran C, SjatkovskaJ O, Gunn-Moore DA. Outbreak of tuberculosis caused by Mycobacterium bovis in a cattery of Abyssinian cats in Italy. Transbound Emerg Dis 2018; 66:250-258. [PMID: 30179308 DOI: 10.1111/tbed.13010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 08/10/2018] [Accepted: 08/14/2018] [Indexed: 12/16/2022]
Abstract
Mycobacterium bovis is a re-emerging zoonosis; it was diagnosed in five Abyssinian cats in a breeding cattery in Italy. The infection entered the cattery with an imported kitten (cat A); it had a suspected bite wound on its leg that had been treated at a veterinary clinic in Kiev, Ukraine, which is probably where it became infected with M. bovis. When the kitten arrived in Italy, there were four cats in the cattery; an adult female, her two kittens and a kitten imported from Russia. These were all healthy, and had no outdoor access. All five cats developed tuberculous interstitial pneumonia; in cat A this occurred 6 weeks after importation, the others were diagnosed 4-6 weeks later. Three cats were euthanised with deteriorating pneumonia while two cats remained clinically well on antibiotic therapy (marbofloxacin, doxycycline and azithromycin). The latter cases were euthanised after 5 weeks, as required by Italian law once M. bovis infection was suspected. Changes consistent with tuberculosis on gross post-mortem examination included mesenteric and mediastinal lymphadenopathy, splenomegaly and hepatomegaly, and the presence of disseminated focal white lesions on the cut surface of the spleen, liver and lungs. Visible acid-fast bacteria (cats A, B and C) were confirmed as Mycobacterium tuberculosis complex by PCR (cats A, B, C, D and E), refined to M. bovis (cats A, B and D), spoligotype SB0950 (cats A and D).
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Affiliation(s)
- Petra Černá
- University of Veterinary and Pharmaceutical Sciences Brno, Brno, Czech Republic
| | - Conor O'Halloran
- Royal (Dick) School of Veterinary Studies and The Roslin Institute, The University of Edinburgh, Roslin, UK
| | | | - Danièlle A Gunn-Moore
- Royal (Dick) School of Veterinary Studies and The Roslin Institute, The University of Edinburgh, Roslin, UK
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Niederhäuser S, Klauser L, Bolliger J, Friedel U, Schmitt S, Ruetten M, Greene CE, Ghielmetti G. First report of nodular skin lesions caused by Mycobacterium nebraskense in a 9-year-old cat. JFMS Open Rep 2018; 4:2055116918792685. [PMID: 30186616 PMCID: PMC6113737 DOI: 10.1177/2055116918792685] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Case summary A 9-year-old cat was referred with multiple, raised, ulcerative skin nodules in the region of the neck and dorsal head. Histopathological findings of a biopsied nodule were granulomatous dermatitis and panniculitis without multinucleated giant cells or caseous necrosis. In addition, by Ziehl–Neelsen staining numerous acid-fast intracellular bacilli were observed within the lesions. Mycobacterial culture showed growth of rough scotochromogenic colonies after 3 weeks of incubation. Molecular characterisation of the isolate identified Mycobacterium nebraskense as the cause of the infection. No phenotypic resistance was detected for the antimycobacterial agents tested. The cat was successfully treated with a combination of surgical excision and a 12 week course of antimicrobial therapy, including rifampicin combined with clarithromycin. Relevance and novel information To our knowledge, this is the first documented case of mycobacterial granulomatous dermatitis and panniculitis due to M nebraskense infection in a cat. The successful surgical and antimycobacterial treatment regimen is described.
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Affiliation(s)
| | | | | | - Ute Friedel
- Institute of Veterinary Bacteriology, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
| | - Sarah Schmitt
- Institute of Veterinary Bacteriology, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
| | | | - Craig E Greene
- Department of Small Animal Medicine and Surgery, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
| | - Giovanni Ghielmetti
- Institute of Veterinary Bacteriology, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
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Kayanuma H, Ogihara K, Yoshida S, Yamamoto K, Wada T, Yamamoto T, Tsuyuki Y, Madarame H. Disseminated nontuberculous mycobacterial disease in a cat caused by Mycobacterium sp. strain MFM001. Vet Microbiol 2018; 220:90-96. [PMID: 29885807 DOI: 10.1016/j.vetmic.2018.05.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2018] [Revised: 05/10/2018] [Accepted: 05/18/2018] [Indexed: 10/16/2022]
Abstract
Mycobacterium sp. strain MFM001 (MFM001), a new strain of slow-growing nontuberculous mycobacteria not associated with the Mycobacterium avium complex, led to disseminated mycobacterial disease characterized by transmural granulomatous gastroenterocolitis of lepromatous type in a cat treated with immunosuppressive medication. MFM001 was found to be closely related to M. kyorinense or M. celatum by partial sequence of 16S rDNA, and identical with an unspecified M. sp. strain B10-07.09.0206 isolated from a human pulmonary infection in Germany. MFM001 should be considered as a pathogenic organism in cats, especially in immunocompromised animals.
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Affiliation(s)
- Hideki Kayanuma
- Laboratory of Veterinary Radiology, Department of Veterinary Medicine, Azabu University, 1-17-71, Fuchinobe, Chuo, Sagamihara, Kanagawa, 252-5201, Japan
| | - Kikumi Ogihara
- Laboratory of Pathology, School of Life and Environmental Science, Azabu University, 1-17-71, Fuchinobe, Chuo, Sagamihara, Kanagawa, 252-5201, Japan
| | - Shiomi Yoshida
- Clinical Research Centre, National Hospital Organization Kinki-chuo Chest Medical Centre, 1180 Nagasone-cho, Kita-ku, Sakai-shi, Osaka, 591-8555, Japan; Graduate School of Biomedical Sciences, Nagasaki University, 1-12-4 Sakamoto, Nagasaki, Nagasaki, 852-8523, Japan
| | - Kaori Yamamoto
- Graduate School of Biomedical Sciences, Nagasaki University, 1-12-4 Sakamoto, Nagasaki, Nagasaki, 852-8523, Japan; Division of Microbiology Microbiology Section, Osaka Institute of Public Health, 8-34 Tojo-cho, Tennoji-ku, Osaka, 543-0026, Japan
| | - Takayuki Wada
- Department of International Health, Institute of Tropical Medicine, Nagasaki University, 1-12-4 Sakamoto, Nagasaki, Nagasaki, 852-8523, Japan; School of Tropical Medicine and Global Health, Nagasaki University, 1-12-4, Sakamoto, Nagasaki, Nagasaki, 852-8523, Japan
| | - Taro Yamamoto
- Graduate School of Biomedical Sciences, Nagasaki University, 1-12-4 Sakamoto, Nagasaki, Nagasaki, 852-8523, Japan; Department of International Health, Institute of Tropical Medicine, Nagasaki University, 1-12-4 Sakamoto, Nagasaki, Nagasaki, 852-8523, Japan
| | - Yuzo Tsuyuki
- Sanritsu Zelkova Veterinary Laboratory, 2-5-8 Kuji, Takatsu-ku, Kawasaki, Kanagawa, 213-0032, Japan
| | - Hiroo Madarame
- Laboratory of Small Animal Clinics, Veterinary Teaching Hospital, Azabu University, 1-17-71, Fuchinobe, Chuo, Sagamihara, Kanagawa, 252-5201, Japan.
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Pekkarinen H, Airas N, Savolainen LE, Rantala M, Kilpinen S, Miuku O, Speeti M, Karkamo V, Malkamäki S, Vaara M, Sukura A, Syrjä P. Non-tuberculous Mycobacteria can Cause Disseminated Mycobacteriosis in Cats. J Comp Pathol 2018; 160:1-9. [PMID: 29729715 PMCID: PMC7094269 DOI: 10.1016/j.jcpa.2018.02.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Revised: 01/11/2018] [Accepted: 02/21/2018] [Indexed: 11/30/2022]
Abstract
Mycobacteriosis caused by non-tuberculous mycobacteria (NTM) is a rising concern in human medicine both in immunocompromised and immunocompetent patients. In cats, mycobacteriosis caused by NTM is considered mostly to be a focal or dermal infection, with disseminated disease mostly caused by Mycobacterium avium. We describe three cases of disseminated mycobacteriosis in cats, caused by Mycobacterium malmoense, Mycobacterium branderi/shimoidei and M. avium, with no identified underlying immunosuppression. In all cases, extracellular mycobacteria were seen in the pulmonary epithelium, intestinal lumen and glomerular tufts, which could affect the shedding of the organism. The present study highlights the importance of mycobacteriosis as a differential even in immunocompetent animals. Considering the close relationship of owners and pets and the potential presence of free mycobacteria in secretions, cats should be considered as a possible environmental reservoir for mycobacteria.
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Affiliation(s)
- H Pekkarinen
- Department of Veterinary Biosciences, Faculty of Veterinary Medicine, PO Box 66, University of Helsinki, Finland.
| | - N Airas
- Department of Veterinary Biosciences, Faculty of Veterinary Medicine, PO Box 66, University of Helsinki, Finland
| | - L E Savolainen
- Department of Clinical Microbiology, University of Helsinki and Helsinki University Hospital, HUSLAB, Finland
| | - M Rantala
- Department of Equine and Small Animal Medicine, Faculty of Veterinary Medicine, PO Box 57, University of Helsinki, Finland
| | - S Kilpinen
- Department of Equine and Small Animal Medicine, Faculty of Veterinary Medicine, PO Box 57, University of Helsinki, Finland
| | - O Miuku
- Department of Equine and Small Animal Medicine, Faculty of Veterinary Medicine, PO Box 57, University of Helsinki, Finland
| | - M Speeti
- Herttoniemi Veterinary Clinic, Hiihtomäentie 35, Finland
| | - V Karkamo
- Pathology Research Unit, Finnish Food Safety Authority Evira, Mustialankatu 3, Helsinki, Finland
| | - S Malkamäki
- Department of Veterinary Biosciences, Faculty of Veterinary Medicine, PO Box 66, University of Helsinki, Finland
| | - M Vaara
- Department of Clinical Microbiology, University of Helsinki and Helsinki University Hospital, HUSLAB, Finland
| | - A Sukura
- Department of Veterinary Biosciences, Faculty of Veterinary Medicine, PO Box 66, University of Helsinki, Finland
| | - P Syrjä
- Department of Veterinary Biosciences, Faculty of Veterinary Medicine, PO Box 66, University of Helsinki, Finland
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Major A, O’Halloran C, Holmes A, Lalor S, Littler R, Spence S, Schwarz T, Gunn-Moore D. Use of computed tomography imaging during long-term follow-up of nine feline tuberculosis cases. J Feline Med Surg 2018; 20:189-199. [PMID: 29366400 PMCID: PMC11129261 DOI: 10.1177/1098612x17699476] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Case series summary Feline tuberculosis is an increasingly recognised potential zoonosis of cats. Treatment is challenging and prognosis can vary greatly between cases. Pulmonary infection requires extended courses of antibiotics, but methodologies for sensitively monitoring response to treatment are currently lacking. In this case series, we retrospectively examined the serial computed tomography (CT) findings in nine cats that had been diagnosed with tuberculosis. Changes in pathology (where applicable to tuberculosis) were correlated with the clinical presentation of each of the cats, the treatment protocol, and previous and contemporary diagnostic investigations. This study found that changes in CT findings during the medium- to long-term management of feline tuberculosis were highly variable between cats. The majority of cats had reduced pathology at re-examination during anti-tuberculous therapy, but pathology only resolved in a minority of cases. In some cases recurrence of pathology detected by CT imaging preceded clinical deterioration, allowing for rapid therapeutic intervention. Relevance and novel information When considered in combination with clinical findings, CT studies can aid in decision making regarding tapering of antibiotic protocols, or reintroduction of therapy in cases of recurrence or reinfection. This series also highlights that, in some cases, persistent abnormalities can be detected by CT, so complete resolution of CT pathology should not always be a goal in the management of feline tuberculosis.
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Affiliation(s)
- Alison Major
- School of Clinical Veterinary Science, University of Bristol/Langford Veterinary Services, Bristol, UK
- Alison Major and Conor O’Halloran should be considered joint first authors
| | - Conor O’Halloran
- Royal (Dick) School of Veterinary Studies and The Roslin Institute, Division of Veterinary Clinical Sciences, The University of Edinburgh, Hospital for Small Animals, Easter Bush Veterinary Centre, Roslin, Midlothian, UK
- Alison Major and Conor O’Halloran should be considered joint first authors
| | - Andrea Holmes
- School of Clinical Veterinary Science, University of Bristol/Langford Veterinary Services, Bristol, UK
| | - Stephanie Lalor
- Willows Veterinary Centre & Referral Service, Solihull, West Midlands, UK
| | - Rebecca Littler
- Northwest Surgeons, Delamere House, Sutton Weaver, Cheshire, UK
| | - Susanna Spence
- Small Animal Hospital, University of Glasgow, Glasgow, UK
| | - Tobias Schwarz
- Royal (Dick) School of Veterinary Studies and The Roslin Institute, Division of Veterinary Clinical Sciences, The University of Edinburgh, Hospital for Small Animals, Easter Bush Veterinary Centre, Roslin, Midlothian, UK
- Tobias Schwarz and Danièlle Gunn-Moore should be considered joint last authors
| | - Danièlle Gunn-Moore
- Royal (Dick) School of Veterinary Studies and The Roslin Institute, Division of Veterinary Clinical Sciences, The University of Edinburgh, Hospital for Small Animals, Easter Bush Veterinary Centre, Roslin, Midlothian, UK
- Tobias Schwarz and Danièlle Gunn-Moore should be considered joint last authors
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O'Halloran C, Dobromylskyj M. Clinical mycobacterial diseases of companion animals: part 2. Management of companion animal mycobacteriosis. ACTA ACUST UNITED AC 2017. [DOI: 10.12968/coan.2017.22.11.652] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Conor O'Halloran
- Royal (Dick) School of Veterinary Studies and the Roslin Institute, Easter Bush Campus, The University of Edinburgh, EH25 9RG
| | - Melanie Dobromylskyj
- Finn Pathologists, Histopathology Department, One Eyed Lane, Weybread, Diss, Norfolk IP21 5TT
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Backel K, Cain C. Skin as a marker of general feline health: Cutaneous manifestations of infectious disease. J Feline Med Surg 2017; 19:1149-1165. [PMID: 29068251 PMCID: PMC10816623 DOI: 10.1177/1098612x17735764] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Practical relevance: Infectious disease in feline patients often presents a diagnostic challenge. This article reviews the most relevant viral, bacterial and protozoal diseases and their cutaneous manifestations. Many of the diseases discussed have overlapping presentations or may mimic more common noninfectious disease processes. The purpose of the article is to reinforce knowledge of common and uncommon infectious diseases, help practitioners identify possible infectious dermatoses, create a comprehensive and prioritized differential list, and provide guidance for the diagnosis of these diseases. A working knowledge of these clinical syndromes is important if what is thought to be a case of a common disease does not respond to conventional management. AUDIENCE This review is aimed at veterinarians who treat cats and especially those with an interest in feline dermatology. Tables are included to allow the reader to formulate a concise list of differential diagnoses for clinically similar presentations. The diagnostic approach to a case of ulcerative facial dermatitis is reviewed in a Case Notes quiz. Evidence base: This article includes up-to-date information regarding dermatologic manifestations of less commonly encountered feline cutaneous infectious diseases. Information has been drawn from the published, peer-reviewed literature and the most recent textbook chapters with a particular aim of describing and differentiating clinical lesions and the diagnostic approach to cutaneous disease, especially in unusual cases.
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Affiliation(s)
- Katherine Backel
- Department of Clinical Sciences and Advanced Medicine, University of Pennsylvania, School of Veterinary Medicine, 3900 Spruce Street, Philadelphia, PA 19104, USA
| | - Christine Cain
- Department of Clinical Sciences and Advanced Medicine, University of Pennsylvania, School of Veterinary Medicine, 3900 Spruce Street, Philadelphia, PA 19104, USA
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40
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Lalor SM, Clarke S, Pink J, Parry A, Scurrell E, Fitzpatrick N, Watson F, O'Halloran C, Gunn-Moore D. Tuberculosis joint infections in four domestic cats. JFMS Open Rep 2017; 3:2055116917719401. [PMID: 28804639 PMCID: PMC5533263 DOI: 10.1177/2055116917719401] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Case series summary This paper describes the clinical presentation, diagnostic imaging findings and outcome in four cats with confirmed joint-associated tuberculosis. The cats were 2–6 years of age, and immune competent. Three cases had tuberculosis affecting only one joint, whereas one case had at least three joints affected. Two cases were caused by Mycobacterium bovis, and the other two were caused by Mycobacterium microti. Radiological findings included osteolysis, periosteal reaction and associated soft tissue swelling. Two cases were euthanased and two cases responded well to amputation and follow-on antibiotic therapy. Relevance and novel information To our knowledge, this is the first publication of a series of cats with joint-associated tuberculosis. Although tuberculosis is not common, a high degree of suspicion is needed to avoid delayed diagnosis. This case series highlights the importance of considering mycobacterial disease as a differential for joint disease in cats.
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Affiliation(s)
- Stephanie M Lalor
- Willows Veterinary Centre and Referral Service, Highlands Road, Solihull, UK
| | - Stephen Clarke
- Willows Veterinary Centre and Referral Service, Highlands Road, Solihull, UK
| | - Jonathan Pink
- Willows Veterinary Centre and Referral Service, Highlands Road, Solihull, UK
| | - Andrew Parry
- Willows Veterinary Centre and Referral Service, Highlands Road, Solihull, UK
| | | | | | | | - Conor O'Halloran
- Royal (Dick) School of Veterinary Studies and the Roslin Institute, Easter Bush Veterinary Centre, Roslin, UK
| | - Danielle Gunn-Moore
- Royal (Dick) School of Veterinary Studies and the Roslin Institute, Easter Bush Veterinary Centre, Roslin, UK
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O'Halloran C, Dobromylskyj M. Clinical mycobacterial diseases of companion animals: part I. ACTA ACUST UNITED AC 2017. [DOI: 10.12968/coan.2017.22.6.325] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Conor O'Halloran
- Royal (Dick) School of Veterinary Studies and the Roslin Institute, Easter Bush Campus, The University of Edinburgh EH25 9RG
| | - Melanie Dobromylskyj
- Finn Pathologists, Histopathology Department, One Eyed Lane, Weybread, Diss, Norfolk IP21 5TT
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O’Brien CR, Malik R, Globan M, Reppas G, McCowan C, Fyfe JA. Feline leprosy due to Candidatus 'Mycobacterium tarwinense':Further clinical and molecular characterisation of 15 previously reported cases and an additional 27 cases. J Feline Med Surg 2017; 19:498-512. [PMID: 28438086 PMCID: PMC10816531 DOI: 10.1177/1098612x17706467] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVES This paper, the first in a series of three on 'feline leprosy', provides a detailed description of disease referable to Candidatus 'Mycobacterium tarwinense', the most common cause of feline leprosy in Victoria, Australia. METHODS Cases were sourced retrospectively and prospectively for this observational study, describing clinical, geographical and molecular microbiological data for cats definitively diagnosed with Candidatus 'M tarwinense' infection. RESULTS A total of 145 cases of feline leprosy were scrutinised; 114 'new' cases were sourced from the Victorian Infectious Diseases Reference Laboratory records, veterinary pathology laboratories or veterinarians, and 31 cases were derived from six published studies. Forty-two cats were definitively diagnosed with Candidatus 'M tarwinense' infection. Typically, cats were between 3 and 11 years of age, with no gender predilection, and were generally systemically well. All had outdoor access. Most cats underwent surgical resection of lesions with adjunctive medical therapy, often utilising a combination of oral clarithromycin and rifampicin for at least 3 months. Prognosis for recovery was generally good. Resolution of lesions was not observed in the absence of treatment, but a number of untreated cats continued to enjoy an acceptable quality of life despite persistence of the disease, which extended locally but did not appear to disseminate to internal organs. Preliminary results of draft genome sequencing confirmed that the species is a member of the Mycobacterium simiae complex. CONCLUSIONS AND RELEVANCE Candidatus 'M tarwinense', a fastidious member of the M simiae complex, is capable of causing feline leprosy with a tendency to produce lesions on the head, particularly involving the eyes and periocular skin. The disease has an indolent clinical course and generally responds favourably to therapy despite lesions often containing large numbers of organisms. Detailed genomic analysis may yield clues as to the environmental niche and culture requirement of this elusive organism. Prospective treatment trials and/or drug susceptibility testing in specialised systems would further inform treatment recommendations.
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Affiliation(s)
- Carolyn R O’Brien
- Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Werribee, VIC 3030, Australia
| | - Richard Malik
- Centre for Veterinary Education, The University of Sydney, NSW 2006, Australia
| | - Maria Globan
- Victorian Infectious Diseases Reference Laboratory, Melbourne, VIC 3000, Australia
| | - George Reppas
- Vetnostics, 60 Waterloo Road, North Ryde, NSW 2113, Australia
| | - Christina McCowan
- Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Werribee, VIC 3030, Australia
- Department of Environment and Primary Industries, Bundoora, VIC 3083, Australia
| | - Janet A Fyfe
- Victorian Infectious Diseases Reference Laboratory, Melbourne, VIC 3000, Australia
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Fitzgerald SD, Hollinger C, Mullaney TP, Bruning-Fann CS, Tilden J, Smith R, Averill J, Kaneene JB. Herd outbreak of bovine tuberculosis illustrates that route of infection correlates with anatomic distribution of lesions in cattle and cats. J Vet Diagn Invest 2016; 28:129-32. [PMID: 26965232 DOI: 10.1177/1040638715626484] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
An outbreak of bovine tuberculosis (TB) in a Michigan dairy herd resulted in quarantine, depopulation, pathology, and epidemiologic investigations. This herd, compared to other TB-infected herds in Michigan, was unusual in the long-term feeding of waste milk to its replacement calves. The herd had 80 cattle with positive results on caudal fold test or gamma interferon testing, which were reclassified as suspects because the herd had never been known to be tuberculous previously. Autopsy revealed striking variation in the anatomic distribution of gross anatomic lesions, microscopic lesions, and culture-positive lymph nodes between the adult cattle, the calves, and the domestic cats present on the farm. Adult cattle had lesions and culture-positive lymph nodes predominantly within the thoracic lymph nodes, whereas cats had 50% of their lesions and culture-positive lymph nodes in their abdomens, and 50% of positive calves had culture-positive lymph nodes in their abdomens. This difference in anatomic distribution correlated with the likely routes of infection, which are believed to be by direct airborne transmission in adult cattle and indirect ingestion of contaminated milk in both calves and cats. Although TB literature over the past 100-plus years states that the route of infection may manifest itself in differences in lesion anatomic distribution, our team has been working with TB for over 20 years, and we have never encountered such striking variation between different groups of animals on the same farm.
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Affiliation(s)
- Scott D Fitzgerald
- Diagnostic Center for Population and Animal Health, Michigan State University, Lansing, MI (Fitzgerald, Hollinger, Mullaney)District Office, Animal Plant Health Inspection Service, U.S. Department of Agriculture, East Lansing, MI (Bruning-Fann)Food Safety Planning and Response Unit, Michigan Department of Agriculture and Rural Development, Lansing, MI (Tilden)State Veterinarian's Office, Michigan Department of Agriculture and Rural Development, Lansing, MI (Smith, Averill)Center for Comparative Epidemiology, Michigan State University, East Lansing, MI (Kaneene)
| | - Charlotte Hollinger
- Diagnostic Center for Population and Animal Health, Michigan State University, Lansing, MI (Fitzgerald, Hollinger, Mullaney)District Office, Animal Plant Health Inspection Service, U.S. Department of Agriculture, East Lansing, MI (Bruning-Fann)Food Safety Planning and Response Unit, Michigan Department of Agriculture and Rural Development, Lansing, MI (Tilden)State Veterinarian's Office, Michigan Department of Agriculture and Rural Development, Lansing, MI (Smith, Averill)Center for Comparative Epidemiology, Michigan State University, East Lansing, MI (Kaneene)
| | - Thomas P Mullaney
- Diagnostic Center for Population and Animal Health, Michigan State University, Lansing, MI (Fitzgerald, Hollinger, Mullaney)District Office, Animal Plant Health Inspection Service, U.S. Department of Agriculture, East Lansing, MI (Bruning-Fann)Food Safety Planning and Response Unit, Michigan Department of Agriculture and Rural Development, Lansing, MI (Tilden)State Veterinarian's Office, Michigan Department of Agriculture and Rural Development, Lansing, MI (Smith, Averill)Center for Comparative Epidemiology, Michigan State University, East Lansing, MI (Kaneene)
| | - Colleen S Bruning-Fann
- Diagnostic Center for Population and Animal Health, Michigan State University, Lansing, MI (Fitzgerald, Hollinger, Mullaney)District Office, Animal Plant Health Inspection Service, U.S. Department of Agriculture, East Lansing, MI (Bruning-Fann)Food Safety Planning and Response Unit, Michigan Department of Agriculture and Rural Development, Lansing, MI (Tilden)State Veterinarian's Office, Michigan Department of Agriculture and Rural Development, Lansing, MI (Smith, Averill)Center for Comparative Epidemiology, Michigan State University, East Lansing, MI (Kaneene)
| | - John Tilden
- Diagnostic Center for Population and Animal Health, Michigan State University, Lansing, MI (Fitzgerald, Hollinger, Mullaney)District Office, Animal Plant Health Inspection Service, U.S. Department of Agriculture, East Lansing, MI (Bruning-Fann)Food Safety Planning and Response Unit, Michigan Department of Agriculture and Rural Development, Lansing, MI (Tilden)State Veterinarian's Office, Michigan Department of Agriculture and Rural Development, Lansing, MI (Smith, Averill)Center for Comparative Epidemiology, Michigan State University, East Lansing, MI (Kaneene)
| | - Rick Smith
- Diagnostic Center for Population and Animal Health, Michigan State University, Lansing, MI (Fitzgerald, Hollinger, Mullaney)District Office, Animal Plant Health Inspection Service, U.S. Department of Agriculture, East Lansing, MI (Bruning-Fann)Food Safety Planning and Response Unit, Michigan Department of Agriculture and Rural Development, Lansing, MI (Tilden)State Veterinarian's Office, Michigan Department of Agriculture and Rural Development, Lansing, MI (Smith, Averill)Center for Comparative Epidemiology, Michigan State University, East Lansing, MI (Kaneene)
| | - James Averill
- Diagnostic Center for Population and Animal Health, Michigan State University, Lansing, MI (Fitzgerald, Hollinger, Mullaney)District Office, Animal Plant Health Inspection Service, U.S. Department of Agriculture, East Lansing, MI (Bruning-Fann)Food Safety Planning and Response Unit, Michigan Department of Agriculture and Rural Development, Lansing, MI (Tilden)State Veterinarian's Office, Michigan Department of Agriculture and Rural Development, Lansing, MI (Smith, Averill)Center for Comparative Epidemiology, Michigan State University, East Lansing, MI (Kaneene)
| | - John B Kaneene
- Diagnostic Center for Population and Animal Health, Michigan State University, Lansing, MI (Fitzgerald, Hollinger, Mullaney)District Office, Animal Plant Health Inspection Service, U.S. Department of Agriculture, East Lansing, MI (Bruning-Fann)Food Safety Planning and Response Unit, Michigan Department of Agriculture and Rural Development, Lansing, MI (Tilden)State Veterinarian's Office, Michigan Department of Agriculture and Rural Development, Lansing, MI (Smith, Averill)Center for Comparative Epidemiology, Michigan State University, East Lansing, MI (Kaneene)
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Day MJ. Cats are not small dogs: is there an immunological explanation for why cats are less affected by arthropod-borne disease than dogs? Parasit Vectors 2016; 9:507. [PMID: 27646278 PMCID: PMC5028948 DOI: 10.1186/s13071-016-1798-5] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Accepted: 09/14/2016] [Indexed: 12/28/2022] Open
Abstract
It is widely recognized that cats appear to be less frequently affected by arthropod-borne infectious diseases than dogs and share fewer zoonotic pathogens with man. This impression is supported by the relative lack of scientific publications related to feline vector-borne infections. This review explores the possible reasons for the difference between the two most common small companion animal species, including the hypothesis that cats might have a genetically-determined immunological resistance to arthropod vectors or the microparasites they transmit. A number of simple possibilities might account for the lower prevalence of these diseases in cats, including factors related to the lifestyle and behaviour of the cat, lesser spend on preventative healthcare for cats and reduced opportunities for research funding for these animals. The dog and cat have substantially similar immune system components, but differences in immune function might in part account for the markedly distinct prevalence and clinicopathological appearance of autoimmune, allergic, idiopathic inflammatory, immunodeficiency, neoplastic and infectious diseases in the two species. Cats have greater genetic diversity than dogs with much lower linkage disequilibrium in feline compared with canine breed groups. Immune function is intrinsically related to the nature of the intestinal microbiome and subtle differences between the canine and feline microbial populations might also impact on immune function and disease resistance. The reasons for the apparent lesser susceptibility of cats to arthropod-borne infectious diseases are likely to be complex, but warrant further investigation.
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Affiliation(s)
- Michael J Day
- School of Veterinary Sciences, University of Bristol, Langford, North Somerset, BS40 5DU, UK.
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Major A, Holmes A, Warren-Smith C, Lalor S, Littler R, Schwarz T, Gunn-Moore D. Computed tomographic findings in cats with mycobacterial infection. J Feline Med Surg 2016; 18:510-7. [PMID: 26045480 PMCID: PMC11185229 DOI: 10.1177/1098612x15588799] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVES The objective of this study was to describe the CT imaging findings associated with confirmed mycobacterial infection in cats. METHODS CT images from 20 cats with confirmed mycobacterial disease were retrospectively reviewed. Five cats underwent conscious full-body CT in a VetMouseTrap device. All other cats had thoracic CT performed under general anaesthesia, with the addition of CT investigation of the head/neck, abdomen and limbs in some cases. RESULTS Mycobacterial infection was seen most frequently in adult (mean age 7.4 years; range 0.6-14 years) neutered male cats (11/20). The most common infections were Mycobacterium microti (6/20) and Mycobacterium bovis (6/20). CT abnormalities were most commonly seen in the thorax, consisting of bronchial (9/20), alveolar (8/20), ground glass (6/20) or structured interstitial (15/20) lung patterns, which were often mixed. Tracheobronchial, sternal and cranial mediastinal lymphadenomegaly were common (16/20). Other abnormalities included abdominal (8/13) or peripheral (10/18) lymphadenomegaly, hepatosplenomegaly (7/13), mixed osteolytic/osteoproliferative skeletal lesions (7/20) and cutaneous or subcutaneous soft tissue masses/nodules (4/20). CONCLUSIONS AND RELEVANCE CT of feline mycobacteriosis shows a wide range of abnormalities, often involving multiple organ systems and mimicking many other feline diseases. Mycobacteriosis should be considered in the differential diagnosis of thoracic, abdominal and skeletal disorders in cats.
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Affiliation(s)
- Alison Major
- Alison Major MA, VetMB, MRCVS, Royal (Dick) School of Veterinary Studies and the Roslin Institute, Division of Veterinary Clinical Sciences, The University of Edinburgh, Hospital for Small Animals, Easter Bush Veterinary Centre, Roslin, Midlothian, EH25 9RG, UK
| | - Andrea Holmes
- School of Clinical Veterinary Science, University of Bristol/Langford Veterinary Services, Langford, Bristol, UK
| | - Christopher Warren-Smith
- School of Clinical Veterinary Science, University of Bristol/Langford Veterinary Services, Langford, Bristol, UK
| | - Stephanie Lalor
- Willows Veterinary Centre and Referral Service, Solihull, UK
| | | | - Tobias Schwarz
- Royal (Dick) School of Veterinary Studies and the Roslin Institute, Division of Veterinary Clinical Sciences, The University of Edinburgh, Hospital for Small Animals, Easter Bush Veterinary Centre, Roslin, UK
| | - Danièlle Gunn-Moore
- Royal (Dick) School of Veterinary Studies and the Roslin Institute, Division of Veterinary Clinical Sciences, The University of Edinburgh, Hospital for Small Animals, Easter Bush Veterinary Centre, Roslin, UK
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O'Halloran C, Gunn-Moore D, Hope J. Diagnosis of feline mycobacteriosis: Feline mycobacteriosis. Vet Rec 2016; 178:145. [DOI: 10.1136/vr.i686] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- Conor O'Halloran
- Royal (Dick) School of Veterinary Studies and the Roslin Institute; University of Edinburgh; Easter Bush Midlothian EH25 9RG
| | - Daniélle Gunn-Moore
- Royal (Dick) School of Veterinary Studies and the Roslin Institute; University of Edinburgh; Easter Bush Midlothian EH25 9RG
| | - Jayne Hope
- Royal (Dick) School of Veterinary Studies and the Roslin Institute; University of Edinburgh; Easter Bush Midlothian EH25 9RG
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Murray A, Dineen A, Kelly P, McGoey K, Madigan G, NiGhallchoir E, Gunn-Moore DA. Nosocomial spread of Mycobacterium bovis in domestic cats. J Feline Med Surg 2015; 17:173-80. [PMID: 24710594 PMCID: PMC10816426 DOI: 10.1177/1098612x14529768] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/10/2024]
Abstract
Five domestic cats were euthanased owing to confirmed or suspected Mycobacterium bovis infection. The initial source of infection remains unclear. Cat A was presented to a veterinary clinic in County Kildare, Ireland, with a discharging submandibular lesion. The infection appears to have been transmitted to four other cats through direct (cats B and C living in the same household as cat A) and non-direct (nosocomial spread during routine operations; cats D and E) contact over a 13.5-week period. Of the five cases, two (B and D) had post-mortem examinations in which gross changes consistent with tuberculosis were seen, moderate numbers of acid-fast bacteria (AFB) were seen on microscopy and M bovis (spoligotype SB0978) was confirmed on culture. Of the remaining three cats, one had a swab taken from its draining ovariohysterectomy wound, which revealed large numbers of AFB with morphology consistent with M bovis (cat E). Two cases were euthanased without diagnostic tests; however, their history and clinical presentations were highly suggestive of tuberculosis (cats A and C). To our knowledge, this is the first documented case of nosocomial spread of M bovis in cats.
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Affiliation(s)
| | - Andrea Dineen
- UCD School of Veterinary Medicine, Belfield, University College Dublin, Dublin, Ireland
| | - Pamela Kelly
- School of Veterinary Medicine, Veterinary Sciences Centre, University College Dublin, Dublin, Ireland
| | | | - Gillian Madigan
- National Mycobacterial Reference Laboratory at the Central Veterinary Research Laboratory of the Department of Agriculture, Food and the Marine, Kildare, Ireland
| | - Eadaoin NiGhallchoir
- National Mycobacterial Reference Laboratory at the Central Veterinary Research Laboratory of the Department of Agriculture, Food and the Marine, Kildare, Ireland
| | - Danièlle A Gunn-Moore
- Royal (Dick) School of Veterinary Studies and The Roslin Institute, University of Edinburgh, Hospital for Small Animals, Easter Bush Veterinary Centre, Roslin, UK
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Abstract
We describe here 35 animal cases of tuberculosis due to Mycobacterium microti in France (2002-2014). Recently, molecular tools that overcome the difficulty of confirming infection by this potentially zoonotic agent have revealed an increasing number of cases, suggesting that its prevalence may have been underestimated.
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49
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Multi-species visit rates to farmyards: implications for biosecurity. Vet J 2014; 203:126-8. [PMID: 25458881 DOI: 10.1016/j.tvjl.2014.10.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Revised: 10/10/2014] [Accepted: 10/14/2014] [Indexed: 11/21/2022]
Abstract
Disease transmission dynamics between wildlife and livestock are likely to be affected by contacts between the two populations. In this study, rates of visitation of rodents, badgers, red foxes and cats to 11 farmyards were quantified from July 2012 to August 2013. There was variation in rates of visitation between different species and between farmyards. Rates of visitation were 60.3% (n = 2374) for cats, 19.1% (n = 751) for rodents, 16.7% (n = 657) for red foxes and 3.9% (n = 153) for badgers. Multi-species visits are relevant to disease transmission, highlighting the need for increased biosecurity on farms.
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Pesciaroli M, Alvarez J, Boniotti M, Cagiola M, Di Marco V, Marianelli C, Pacciarini M, Pasquali P. Tuberculosis in domestic animal species. Res Vet Sci 2014; 97 Suppl:S78-85. [DOI: 10.1016/j.rvsc.2014.05.015] [Citation(s) in RCA: 103] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2013] [Revised: 04/07/2014] [Accepted: 05/19/2014] [Indexed: 02/03/2023]
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