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Takai S, Sawada N, Nakayama Y, Ishizuka S, Nakagawa R, Kawashima G, Sangkanjanavanich N, Sasaki Y, Kakuda T, Suzuki Y. Reinvestigation of the virulence of Rhodococcus equi isolates from patients with and without AIDS. Lett Appl Microbiol 2020; 71:679-683. [PMID: 32920889 DOI: 10.1111/lam.13386] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 09/02/2020] [Accepted: 09/03/2020] [Indexed: 11/29/2022]
Abstract
Rhodococcus equi emerged as a zoonotic pathogen of human immunodeficiency virus-infected patients over the last three decades. Two virulence plasmid types of R. equi, pVAPA and pVAPB associated with equine and porcine isolates, have been recognized, and more recently, pVAPN, a novel host-associated virulence plasmid in R. equi, was found in bovine and caprine isolates. We reinvestigated 39 previously reported isolates of R. equi from patients with and without acquired immunodeficiency syndrome (AIDS) by detecting vapA, vapB and vapN using PCR and plasmid profiling. After excluding one isolate that could not be cultured from frozen storage, eight isolates carried a virulence plasmid encoding vapA (pVAPA), 10 carried a virulence plasmid encoding vapB (pVAPB), seven carried a virulence plasmid encoding vapN (pVAPN) and 13 were negative for those genes. Of the 29 isolates from patients with AIDS, 7, 10 and 5 harboured pVAPA, pVAPB and pVAPN respectively. Among nine isolates from patients without AIDS, one and two harboured pVAPA and pVAPN respectively. This study demonstrated that pVAPN-positive R. equi existed in human isolates before 1994 and reaffirmed that equine-associated pVAPA-positive, porcine-associated pVAPB-positive and bovine- or caprine-associated pVAPN-positive R. equi are widely spread globally. Because domestic animals might be major sources of human infection, further research is needed to reveal the prevalence of pVAPN-positive R. equi infection in cattle and goats.
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Affiliation(s)
- S Takai
- Laboratory of Animal Hygiene, Kitasato University School of Veterinary Medicine, Towada, Aomori, Japan
| | - N Sawada
- Laboratory of Animal Hygiene, Kitasato University School of Veterinary Medicine, Towada, Aomori, Japan
| | - Y Nakayama
- Laboratory of Animal Hygiene, Kitasato University School of Veterinary Medicine, Towada, Aomori, Japan
| | - S Ishizuka
- Laboratory of Animal Hygiene, Kitasato University School of Veterinary Medicine, Towada, Aomori, Japan
| | - R Nakagawa
- Laboratory of Animal Hygiene, Kitasato University School of Veterinary Medicine, Towada, Aomori, Japan
| | - G Kawashima
- Laboratory of Animal Hygiene, Kitasato University School of Veterinary Medicine, Towada, Aomori, Japan
| | - N Sangkanjanavanich
- Laboratory of Animal Hygiene, Kitasato University School of Veterinary Medicine, Towada, Aomori, Japan.,Faculty of Veterinary Medicine, Mahanakorn University of Technology, Bangkok, Thailand
| | - Y Sasaki
- Laboratory of Animal Hygiene, Kitasato University School of Veterinary Medicine, Towada, Aomori, Japan
| | - T Kakuda
- Laboratory of Animal Hygiene, Kitasato University School of Veterinary Medicine, Towada, Aomori, Japan
| | - Y Suzuki
- Laboratory of Animal Hygiene, Kitasato University School of Veterinary Medicine, Towada, Aomori, Japan
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Löhr CV, O'Neill TW, Daw DN, Pitel MO, Schlipf JW. Pyogranulomatous enteritis and mesenteric lymphadenitis in an adult llama caused by Rhodococcus equi carrying virulence-associated protein A gene. J Vet Diagn Invest 2019; 31:747-751. [PMID: 31272304 DOI: 10.1177/1040638719862834] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
We report herein Rhodococcus equi infection in an 11-y-old, male llama with a history of diarrhea and endoparasitism. Postmortem examination revealed granulomatous and ulcerative enteritis, pyogranulomatous mesenteric lymphadenitis, fibrinosuppurative peritonitis, and granulomatous hepatitis. Intralesional macrophages were laden with gram-positive cocci. Bacteriology identified R. equi, and cultures tested positive for R. equi choE and vapA genes by PCR. This case expands the reported spectrum of lesions associated with R. equi infections in llamas from pyogranulomatous bronchopneumonia and peripheral lymphadenitis to pyogranulomatous mesenteric lymphadenitis and enteritis. We also link a R. equi that is carrying the virulent-associated protein gene VapA to clinical disease in New World camelids.
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Affiliation(s)
- Christiane V Löhr
- Oregon Veterinary Diagnostic Laboratory, Departments of Biomedical Sciences (Löhr, O'Neill).,Clinical Sciences (Daw, Pitel, Schlipf), Carlson College of Veterinary Medicine, Oregon State University, Corvallis, OR
| | - T William O'Neill
- Oregon Veterinary Diagnostic Laboratory, Departments of Biomedical Sciences (Löhr, O'Neill).,Clinical Sciences (Daw, Pitel, Schlipf), Carlson College of Veterinary Medicine, Oregon State University, Corvallis, OR
| | - Danielle N Daw
- Oregon Veterinary Diagnostic Laboratory, Departments of Biomedical Sciences (Löhr, O'Neill).,Clinical Sciences (Daw, Pitel, Schlipf), Carlson College of Veterinary Medicine, Oregon State University, Corvallis, OR
| | - Mariya O Pitel
- Oregon Veterinary Diagnostic Laboratory, Departments of Biomedical Sciences (Löhr, O'Neill).,Clinical Sciences (Daw, Pitel, Schlipf), Carlson College of Veterinary Medicine, Oregon State University, Corvallis, OR
| | - John W Schlipf
- Oregon Veterinary Diagnostic Laboratory, Departments of Biomedical Sciences (Löhr, O'Neill).,Clinical Sciences (Daw, Pitel, Schlipf), Carlson College of Veterinary Medicine, Oregon State University, Corvallis, OR
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