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Abstract
We describe a case of septic arthritis caused by Staphylococcus pseudintermedius, a common colonizer of dogs that has emerged as a rare human pathogen. Our patient presented with ankle pain and swelling and was treated adequately with cefazolin/cephalexin and arthrotomy. S. pseudintermedius is often misidentified as other coagulase-positive staphylococcal species and has high rates of methicillin and nonpenicillin antibiotic resistance.
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Affiliation(s)
| | | | | | | | - Andrew S Handel
- Division of Infectious Diseases, Department of Pediatrics, Stony Brook Children's Hospital, Stony Brook, NY
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Kitagawa H, Hisatsune J, Ohge H, Kutsuno S, Hara T, Masuda K, Aziz F, Sugai M. Implanted Port Catheter System Infection Caused by Methicillin-resistant Staphylococcus pseudintermedius ST71-SCCmec type III. Intern Med 2021; 60:2337-2340. [PMID: 33583884 PMCID: PMC8355384 DOI: 10.2169/internalmedicine.5579-20] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Staphylococcus pseudintermedius is commonly associated with skin and soft tissue infections in dogs. However, infections caused by S. pseudintermedius are only rarely reported in humans, and this pathogen is frequently misidentified as S. aureus. We herein report a case of an implanted port catheter system infection caused by methicillin-resistant S. pseudintermedius (MRSP) in a patient with hepatocellular carcinoma. The patient was also a dog owner. S. pseudintermedius was first identified using the Vitek2 system (BioMérieux). Whole-genome sequencing revealed that this MRSP was a sequence type 71-carrying staphylococcal cassette chromosome mec type III (ST71-SCCmec III) isolate.
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Affiliation(s)
- Hiroki Kitagawa
- Project Research Center for Nosocomial Infectious Diseases, Hiroshima University, Japan
- Department of Infectious Diseases, Hiroshima University Hospital, Japan
- Department of Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Japan
| | - Junzo Hisatsune
- Project Research Center for Nosocomial Infectious Diseases, Hiroshima University, Japan
- Antimicrobial Resistance Research Center, National Institute of Infectious Diseases, Japan
- Department of Antimicrobial Resistance, Graduate School of Biomedical and Health Sciences, Hiroshima University, Japan
| | - Hiroki Ohge
- Project Research Center for Nosocomial Infectious Diseases, Hiroshima University, Japan
- Department of Infectious Diseases, Hiroshima University Hospital, Japan
| | - Shoko Kutsuno
- Project Research Center for Nosocomial Infectious Diseases, Hiroshima University, Japan
- Antimicrobial Resistance Research Center, National Institute of Infectious Diseases, Japan
- Department of Antimicrobial Resistance, Graduate School of Biomedical and Health Sciences, Hiroshima University, Japan
| | - Toshinori Hara
- Project Research Center for Nosocomial Infectious Diseases, Hiroshima University, Japan
- Department of Antimicrobial Resistance, Graduate School of Biomedical and Health Sciences, Hiroshima University, Japan
- Section of Clinical Laboratory, Division of Clinical Support, Hiroshima University Hospital, Japan
| | - Kanako Masuda
- Project Research Center for Nosocomial Infectious Diseases, Hiroshima University, Japan
- Department of Antimicrobial Resistance, Graduate School of Biomedical and Health Sciences, Hiroshima University, Japan
| | - Fatkhanuddin Aziz
- Project Research Center for Nosocomial Infectious Diseases, Hiroshima University, Japan
- Department of Antimicrobial Resistance, Graduate School of Biomedical and Health Sciences, Hiroshima University, Japan
- Department of Bioresources Technology and Veterinary, Vocational College, Universitas Gadjah Mada, Indonesia
| | - Motoyuki Sugai
- Project Research Center for Nosocomial Infectious Diseases, Hiroshima University, Japan
- Antimicrobial Resistance Research Center, National Institute of Infectious Diseases, Japan
- Department of Antimicrobial Resistance, Graduate School of Biomedical and Health Sciences, Hiroshima University, Japan
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Uchida-Fujii E, Niwa H, Kinoshita Y, Nukada T. Matrix-Assisted Laser Desorption Ionization-Time of Flight Mass Spectrometry (MALDI-TOF MS) for Identification of Bacterial Isolates From Horses. J Equine Vet Sci 2020; 95:103276. [PMID: 33276932 DOI: 10.1016/j.jevs.2020.103276] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 09/15/2020] [Accepted: 09/16/2020] [Indexed: 11/17/2022]
Abstract
Matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS) is used for bacterial identification by analyzing the spectra of isolates and comparing them against a database of reference spectra; it is known for its rapidity and accuracy. Although MALDI-TOF MS is used for identification of bacterial isolates from animals, not all animal pathogens are identified correctly. In this study, we used a commercial MALDI-TOF MS identification system to examine 3724 bacterial isolates from horses and their environments. Isolates that could not be identified with MALDI-TOF MS were identified by 16S rRNA gene sequence taxonomic analysis. MALDI-TOF MS could identify 86.2% of the isolates from horses to the species level, showing that this method could be successfully applied for bacterial identification in horses. However, some species known to be equine pathogenic agents including Taylorella equigenitalis and Rhodococcus equi were difficult to identify with MALDI-TOF MS, which might be the result of an inadequate reference database. Some Prevotella, Staphylococcus, and Streptococcus isolates, which could not be identified with either MALDI-TOF MS or 16S rRNA gene sequencing analysis, formed clusters in the 16S rRNA phylogenic tree, and might be unknown species isolated from horses. Adding the spectra of isolates identified in this study to an in-house database might make MALDI-TOF MS a more useful tool for identifying equine isolates.
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Affiliation(s)
- Eri Uchida-Fujii
- Microbiology Division, Equine Research Institute, Japan Racing Association, Shimotsuke, Tochigi, Japan.
| | - Hidekazu Niwa
- Microbiology Division, Equine Research Institute, Japan Racing Association, Shimotsuke, Tochigi, Japan
| | - Yuta Kinoshita
- Microbiology Division, Equine Research Institute, Japan Racing Association, Shimotsuke, Tochigi, Japan
| | - Toshio Nukada
- Microbiology Division, Equine Research Institute, Japan Racing Association, Shimotsuke, Tochigi, Japan
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Vrbovská V, Sedláček I, Zeman M, Švec P, Kovařovic V, Šedo O, Laichmanová M, Doškař J, Pantůček R. Characterization of Staphylococcus intermedius Group Isolates Associated with Animals from Antarctica and Emended Description of Staphylococcus delphini. Microorganisms 2020; 8:microorganisms8020204. [PMID: 32024111 PMCID: PMC7074773 DOI: 10.3390/microorganisms8020204] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 01/23/2020] [Accepted: 01/30/2020] [Indexed: 11/16/2022] Open
Abstract
Members of the genus Staphylococcus are widespread in nature and occupy a variety of niches, however, staphylococcal colonization of animals in the Antarctic environment has not been adequately studied. Here, we describe the first isolation and characterization of two Staphylococcus intermedius group (SIG) members, Staphylococcus delphini and Staphylococcus pseudintermedius, in Antarctic wildlife. Staphylococcus delphini were found exclusively in Adélie penguins. The report of S. pseudintermedius from Weddell seals confirmed its occurrence in all families of the suborder Caniformia. Partial RNA polymerase beta-subunit (rpoB) gene sequencing, repetitive PCR fingerprinting with the (GTG)5 primer, and matrix-assisted laser-desorption/ionization time-of-flight mass spectrometry gave consistent identification results and proved to be suitable for identifying SIG members. Comparative genomics of S. delphini isolates revealed variable genomic elements, including new prophages, a novel phage-inducible chromosomal island, and numerous putative virulence factors. Surface and extracellular protein distribution were compared between genomes and showed strain-specific profiles. The pathogenic potential of S. delphini was enhanced by a novel type of exfoliative toxin, trypsin-like serine protease cluster, and enterotoxin C. Detailed analysis of phenotypic characteristics performed on six Antarctic isolates of S. delphini and eight reference strains from different animal sources enabled us to emend the species description of S. delphini.
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Affiliation(s)
- Veronika Vrbovská
- Division of Genetics and Molecular Biology, Department of Experimental Biology, Faculty of Science, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic; (V.V.); (M.Z.); (V.K.); (J.D.)
| | - Ivo Sedláček
- Czech Collection of Microorganisms, Department of Experimental Biology, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic; (I.S.); (P.Š.); (M.L.)
| | - Michal Zeman
- Division of Genetics and Molecular Biology, Department of Experimental Biology, Faculty of Science, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic; (V.V.); (M.Z.); (V.K.); (J.D.)
- Czech Collection of Microorganisms, Department of Experimental Biology, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic; (I.S.); (P.Š.); (M.L.)
| | - Pavel Švec
- Czech Collection of Microorganisms, Department of Experimental Biology, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic; (I.S.); (P.Š.); (M.L.)
| | - Vojtěch Kovařovic
- Division of Genetics and Molecular Biology, Department of Experimental Biology, Faculty of Science, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic; (V.V.); (M.Z.); (V.K.); (J.D.)
| | - Ondrej Šedo
- Central European Institute of Technology, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic;
| | - Monika Laichmanová
- Czech Collection of Microorganisms, Department of Experimental Biology, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic; (I.S.); (P.Š.); (M.L.)
| | - Jiří Doškař
- Division of Genetics and Molecular Biology, Department of Experimental Biology, Faculty of Science, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic; (V.V.); (M.Z.); (V.K.); (J.D.)
| | - Roman Pantůček
- Division of Genetics and Molecular Biology, Department of Experimental Biology, Faculty of Science, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic; (V.V.); (M.Z.); (V.K.); (J.D.)
- Correspondence: ; Tel.: +420-549-49-6379
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