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Zhang J, Conly J, McClure J, Wu K, Petri B, Barber D, Elsayed S, Armstrong G, Zhang K. A Murine Skin Infection Model Capable of Differentiating the Dermatopathology of Community-Associated MRSA Strain USA300 from Other MRSA Strains. Microorganisms 2021; 9:microorganisms9020287. [PMID: 33573328 PMCID: PMC7912111 DOI: 10.3390/microorganisms9020287] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 01/23/2021] [Accepted: 01/26/2021] [Indexed: 12/31/2022] Open
Abstract
USA300 is a predominant and highly virulent community-associated methicillin-resistant Staphylococcus aureus (CA-MRSA) strain that is a leading cause of skin and soft tissue infections. We established a murine intradermal infection model capable of demonstrating dermatopathological differences between USA300 and other MRSA strains. In this model, USA300 induced dermonecrosis, uniformly presenting as extensive open lesions with a histologically documented profound inflammatory cell infiltrate extending below the subcutis. In contrast, USA400 and a colonizing control strain M92 caused only localized non-ulcerated skin infections associated with a mild focal inflammatory infiltrate. It was also determined that the dermonecrosis induced by USA300 was associated with significantly increased neutrophil recruitment, inhibition of an antibacterial response, and increased production of cytokines/chemokines associated with disease severity. These results suggest that induction of severe skin lesions by USA300 is related to over-activation of neutrophils, inhibition of host antibacterial responses, and selective alteration of host cytokine/chemokine profiles.
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Affiliation(s)
- Jack Zhang
- Department of Pathology & Laboratory Medicine, University of Calgary, Calgary, AB T2N4N1, Canada; (J.Z.); (J.C.); (J.M.); (K.W.); (D.B.)
- Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, AB T2N4N1, Canada; (B.P.); (S.E.); (G.A.)
| | - John Conly
- Department of Pathology & Laboratory Medicine, University of Calgary, Calgary, AB T2N4N1, Canada; (J.Z.); (J.C.); (J.M.); (K.W.); (D.B.)
- Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, AB T2N4N1, Canada; (B.P.); (S.E.); (G.A.)
- Department of Medicine, University of Calgary, Calgary, AB T2N4N1, Canada
- Centre for Antimicrobial Resistance, Alberta Health Services, Alberta Precision Laboratories, University of Calgary, Calgary, AB T2N4N1, Canada
- The Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB T2N4N1, Canada
| | - JoAnn McClure
- Department of Pathology & Laboratory Medicine, University of Calgary, Calgary, AB T2N4N1, Canada; (J.Z.); (J.C.); (J.M.); (K.W.); (D.B.)
- Centre for Antimicrobial Resistance, Alberta Health Services, Alberta Precision Laboratories, University of Calgary, Calgary, AB T2N4N1, Canada
| | - Kaiyu Wu
- Department of Pathology & Laboratory Medicine, University of Calgary, Calgary, AB T2N4N1, Canada; (J.Z.); (J.C.); (J.M.); (K.W.); (D.B.)
- Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, AB T2N4N1, Canada; (B.P.); (S.E.); (G.A.)
| | - Bjӧrn Petri
- Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, AB T2N4N1, Canada; (B.P.); (S.E.); (G.A.)
- The Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB T2N4N1, Canada
| | - Duane Barber
- Department of Pathology & Laboratory Medicine, University of Calgary, Calgary, AB T2N4N1, Canada; (J.Z.); (J.C.); (J.M.); (K.W.); (D.B.)
| | - Sameer Elsayed
- Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, AB T2N4N1, Canada; (B.P.); (S.E.); (G.A.)
- Department of Medicine, University of Western Ontario, London, ON N6A5C1, Canada
| | - Glen Armstrong
- Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, AB T2N4N1, Canada; (B.P.); (S.E.); (G.A.)
| | - Kunyan Zhang
- Department of Pathology & Laboratory Medicine, University of Calgary, Calgary, AB T2N4N1, Canada; (J.Z.); (J.C.); (J.M.); (K.W.); (D.B.)
- Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, AB T2N4N1, Canada; (B.P.); (S.E.); (G.A.)
- Department of Medicine, University of Calgary, Calgary, AB T2N4N1, Canada
- Centre for Antimicrobial Resistance, Alberta Health Services, Alberta Precision Laboratories, University of Calgary, Calgary, AB T2N4N1, Canada
- The Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB T2N4N1, Canada
- Correspondence: ; Tel.: +1-403-210-8484
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Lepuschitz S, Huhulescu S, Hyden P, Springer B, Rattei T, Allerberger F, Mach RL, Ruppitsch W. Characterization of a community-acquired-MRSA USA300 isolate from a river sample in Austria and whole genome sequence based comparison to a diverse collection of USA300 isolates. Sci Rep 2018; 8:9467. [PMID: 29930324 PMCID: PMC6013426 DOI: 10.1038/s41598-018-27781-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Accepted: 06/11/2018] [Indexed: 01/17/2023] Open
Abstract
The increasing emergence of multi-resistant bacteria in healthcare settings, in the community and in the environment represents a major health threat worldwide. In 2016, we started a pilot project to investigate antimicrobial resistance in surface water. Bacteria were enriched, cultivated on selective chromogenic media and species identification was carried out by MALDI-TOF analysis. From a river in southern Austria a methicillin resistant Staphylococcus aureus (MRSA) was isolated. Whole genome sequence analysis identified the isolate as ST8, spa type t008, SCCmecIV, PVL and ACME positive, which are main features of CA-MRSA USA300. Whole genome based cgMLST of the water isolate and comparison to 18 clinical MRSA USA300 isolates from the Austrian national reference laboratory for coagulase positive staphylococci originating from 2004, 2005 and 2016 and sequences of 146 USA300 isolates arbitrarily retrieved from the Sequence Read Archive revealed a close relatedness to a clinical isolate from Austria. The presence of a CA-MRSA USA300 isolate in an aquatic environment might pose a public health risk by serving as a potential source of infection or a source for emergence of new pathogenic MRSA clones.
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Affiliation(s)
- Sarah Lepuschitz
- Austrian Agency for Health and Food Safety, National Reference Laboratory for Coagulase Positive Staphylococci including Staphylococcus aureus, Graz, Austria.
- Vienna University of Technology, Research Area of Biochemical Technology, Institute of Chemical, Biological and Environmental Engineering, Vienna, Austria.
| | - Steliana Huhulescu
- Austrian Agency for Health and Food Safety, National Reference Laboratory for Coagulase Positive Staphylococci including Staphylococcus aureus, Graz, Austria
| | - Patrick Hyden
- University of Vienna, Department of Microbiology and Ecosystem Science, Vienna, Austria
| | - Burkhard Springer
- Austrian Agency for Health and Food Safety, National Reference Laboratory for Coagulase Positive Staphylococci including Staphylococcus aureus, Graz, Austria
| | - Thomas Rattei
- University of Vienna, Department of Microbiology and Ecosystem Science, Vienna, Austria
| | - Franz Allerberger
- Austrian Agency for Health and Food Safety, National Reference Laboratory for Coagulase Positive Staphylococci including Staphylococcus aureus, Graz, Austria
| | - Robert L Mach
- Vienna University of Technology, Research Area of Biochemical Technology, Institute of Chemical, Biological and Environmental Engineering, Vienna, Austria
| | - Werner Ruppitsch
- Austrian Agency for Health and Food Safety, National Reference Laboratory for Coagulase Positive Staphylococci including Staphylococcus aureus, Graz, Austria
- University of Natural Resources and Life Sciences, Department of Biotechnology, Vienna, Austria
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