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Piksa M, Fortuna W, Lian C, Gacka M, Samuel IDW, Matczyszyn K, Pawlik KJ. Treatment of antibiotic-resistant bacteria colonizing diabetic foot ulcers by OLED induced antimicrobial photodynamic therapy. Sci Rep 2023; 13:14087. [PMID: 37640720 PMCID: PMC10462621 DOI: 10.1038/s41598-023-39363-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Accepted: 07/24/2023] [Indexed: 08/31/2023] Open
Abstract
We evaluate the efficacy of antimicrobial Photodynamic Therapy (APDT) for inactivating a variety of antibiotic-resistant clinical strains from diabetic foot ulcers. Here we are focused on APDT based on organic light-emitting diodes (OLED). The wound swabs from ten patients diagnosed with diabetic foot ulcers were collected and 32 clinical strains comprising 22 bacterial species were obtained. The isolated strains were identified with the use of mass spectrometry coupled with a protein profile database and tested for antibiotic susceptibility. 74% of isolated bacterial strains exhibited adaptive antibiotic resistance to at least one antibiotic. All strains were subjected to the APDT procedure using an OLED as a light source and 16 µM methylene blue as a photosensitizer. APDT using the OLED led to a large reduction in all cases. For pathogenic bacteria, the reduction ranged from 1.1-log to > 8 log (Klebsiella aerogenes, Enterobacter cloaca, Staphylococcus hominis) even for high antibiotic resistance (MRSA 5-log reduction). Opportunistic bacteria showed a range from 0.4-log reduction for Citrobacter koseri to > 8 log reduction for Kocuria rhizophila. These results show that OLED-driven APDT is effective against pathogens and opportunistic bacteria regardless of drug resistance.
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Affiliation(s)
- Marta Piksa
- Ludwik Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Weigla 12, 53-114, Wroclaw, Poland
| | - Wojciech Fortuna
- Ludwik Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Weigla 12, 53-114, Wroclaw, Poland
- Department of Neurosurgery, Wroclaw Medical University, Borowska 213, 50-556, Wroclaw, Poland
| | - Cheng Lian
- Organic Semiconductor Centre, School of Physics and Astronomy, SUPA, University of St Andrews, St Andrews, KY16 9SS, UK
| | | | - Ifor D W Samuel
- Organic Semiconductor Centre, School of Physics and Astronomy, SUPA, University of St Andrews, St Andrews, KY16 9SS, UK
| | - Katarzyna Matczyszyn
- Advanced Materials Engineering and Modelling Group, Faculty of Chemistry, Wroclaw University of Science and Technology, Wyb. Wyspianskiego 27, 50-370, Wroclaw, Poland.
| | - Krzysztof J Pawlik
- Ludwik Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Weigla 12, 53-114, Wroclaw, Poland.
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2
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Drobeniuc A, Traenkner J, Rebolledo PA, Ghazaryan V, Rouphael N. Staphylococcus simulans: A rare uropathogen. IDCases 2021; 25:e01202. [PMID: 34195001 PMCID: PMC8225963 DOI: 10.1016/j.idcr.2021.e01202] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2021] [Revised: 06/15/2021] [Accepted: 06/15/2021] [Indexed: 11/25/2022] Open
Abstract
Urinary tract infections (UTIs) are clinically and economically burdensome. Gram positive causative uropathogens are rare, and Staphylococcus simulans has infrequently been isolated as a causative agent for UTIs. Here, we present two cases of S. simulans causing complicated urinary tract infections.
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Affiliation(s)
- Ana Drobeniuc
- Hope Clinic of the Emory Vaccine Center, Division of Infectious Diseases, Department of Medicine, School of Medicine, Decatur, GA, USA
| | - Jessica Traenkner
- Hope Clinic of the Emory Vaccine Center, Division of Infectious Diseases, Department of Medicine, School of Medicine, Decatur, GA, USA
| | - Paulina A Rebolledo
- Hope Clinic of the Emory Vaccine Center, Division of Infectious Diseases, Department of Medicine, School of Medicine, Decatur, GA, USA
| | - Varduhi Ghazaryan
- Division of Microbiology and Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Nadine Rouphael
- Hope Clinic of the Emory Vaccine Center, Division of Infectious Diseases, Department of Medicine, School of Medicine, Decatur, GA, USA
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Syed MA, Ullah H, Tabassum S, Fatima B, Woodley TA, Ramadan H, Jackson CR. Staphylococci in poultry intestines: a comparison between farmed and household chickens. Poult Sci 2020; 99:4549-4557. [PMID: 32867999 PMCID: PMC7598113 DOI: 10.1016/j.psj.2020.05.051] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Accepted: 05/03/2020] [Indexed: 01/29/2023] Open
Abstract
Both pathogenic as well as nonpathogenic species of staphylococci have been reported in poultry, but these studies have not compared staphylococcal flora of both farmed and household broiler chickens. Staphylococci from farmed (n = 51) and household chicken intestines (n = 43) were isolated and tested for resistance to antimicrobials, presence of resistance genes, and inhibitory activity against other bacteria; correlation of resistance phenotype and genotype was also evaluated. At least 12 staphylococcal species were identified; Staphylococcus carnosus subspecies carnosus was the predominant species from both sources. Most farmed chicken staphylococci were resistant to tigecycline (38/51; 74.8%) while the highest level of resistance among the household chicken staphylococci was to clindamycin (31/43; 72.1%). The mecA gene was only detected in staphylococci from household chickens, whereas ermC and tetK or tetM were found in staphylococci from both groups of birds. Multidrug resistance (resistance ≥ 2 antimicrobial classes) was observed in 88% of resistant staphylococci ranging from 2 to 8 classes and up to 10 antimicrobials. Isolates produced inhibitory activity against 7 clinical bacterial strains primarily Enterococcus faecalis (25/88; 28.4%) and Escherichia coli (22/88; 25%). This study demonstrated that the staphylococcal population among farmed and household chickens varies by species and resistance to antimicrobials. These results may reflect the influence of the environment or habitat of each bird type on the intestinal microflora. As resistance in the staphylococci to antimicrobials used to treat human infections was detected, further study is warranted to determine strategies to prevent transfer of these resistant populations to humans via contamination of the poultry meat.
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Affiliation(s)
- Muhammad Ali Syed
- Department of Microbiology, The University of Haripur, Haripur, Pakistan
| | - Hakim Ullah
- Department of Zoology, Hazara University, Mansehra, Pakistan
| | - Sadia Tabassum
- Department of Zoology, Hazara University, Mansehra, Pakistan
| | - Bushra Fatima
- Department of Microbiology, The University of Haripur, Haripur, Pakistan
| | - Tiffanie A Woodley
- Bacterial Epidemiology and Antimicrobial Resistance Research Unit, USDA-ARS, U.S. National Poultry Research Center, Athens, GA
| | - Hazem Ramadan
- Hygiene and Zoonoses Department, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
| | - Charlene R Jackson
- Bacterial Epidemiology and Antimicrobial Resistance Research Unit, USDA-ARS, U.S. National Poultry Research Center, Athens, GA.
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Gonçalves TG, Timm CD. Biofilm production by coagulase-negative Staphylococcus: a review. ARQUIVOS DO INSTITUTO BIOLÓGICO 2020. [DOI: 10.1590/1808-1657001382018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
ABSTRACT: This review aimed to describe the biofilm formation ability of coagulase-negative Staphylococcus, addressing its impact to the food industry. Coagulase-negative Staphylococcus have the ability to produce enterotoxins in food, making it an important line of study, as it constitutes a risk to public health. The biofilm formation by these microorganisms requires physicochemical processes, such as hydrophobic forces, which are essential for the first phase of fixing the biofilm on the surface. In industrial facilities, stainless steel equipment is the most associated with the formation of biofilms, due to the presence grooves and cracks. Many species of coagulase-negative Staphylococcus produce biofilm, but the most studied is S. epidermidis, as it is the most frequently isolated from food. Coagulase-negative Staphylococcus form biofilm on different surfaces in the food industry, and can become a source of permanent contamination, that can be present in the final product, intended for human consumption. Among other alternatives to combat the formation of biofilm in industrial food facilities, there is the implementation of Good Manufacturing Practices, which is effective in preventing bacterial adhesion, and therefore, the formation of biofilm. However, further studies are needed in order to quantify the occurrence of coagulase-negative Staphylococcus biofilms in the food industry.
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Morrell JM, Núñez-González A, Crespo-Félez I, Martínez-Martínez S, Martínez Alborcia MJ, Fernández-Alegre E, Dominguez JC, Gutiérrez-Martín CB, Martínez-Pastor F. Removal of bacteria from boar semen using a low-density colloid. Theriogenology 2018; 126:272-278. [PMID: 30594102 DOI: 10.1016/j.theriogenology.2018.12.028] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Revised: 11/18/2018] [Accepted: 12/14/2018] [Indexed: 11/28/2022]
Abstract
Antibiotics are added to semen extenders when preparing commercial semen doses for artificial insemination according to national and international guidelines. However, this addition of antibiotics represents non-therapeutic usage and could be contributing to the development of antibiotic resistance. Colloid centrifugation was shown to reduce the load of bacteria present in boar semen and was capable of removing all bacteria if performed directly after semen collection, albeit with some loss of spermatozoa. The present experiment was conducted with a low density colloid to investigate whether it was possible to separate all of the spermatozoa from seminal plasma i.e. without selection for robust spermatozoa, or whether this would have a detrimental effect on sperm quality. Ejaculates from nine boars were extended in Beltsville Thawing Solution without antibiotics and were transported to the laboratory for Single Layer Centrifugation (SLC) on modified Porcicoll i.e. at a low density (S). A further modification was that a sterile inner tube was included inside some of the 50 mL centrifuge tubes to facilitate harvesting of the sperm pellet (M). Aliquots of all samples (control, S and M) were cultured for bacterial quantification and identification using standard microbiological methods. Sperm quality was evaluated daily. Three of the C and M samples and five of the S samples did not contain any bacteria. Mean bacterial counts for the remaining samples (colony forming units/mL) were as follows: C 259 ± 216; S 30 ± 22; M 33 ± 15 (P < 0.01). Citrobacter spp., Staphylococcus simulans, Klebsiella variicola, Escherichia coli, Myroides odoratimimus, Proteus spp. and Enterococcus faecalis were identified in the control samples. There were marginal differences in sperm quality among treatments, with sperm velocity and linearity being higher in S and M samples than in C at all time points. However, sperm viability, capacitation and acrosome status were marginally better in controls than in S or M on day 0, but these differences disappeared during storage. Conclusions: centrifugation through a low density colloid can remove or reduce bacterial contamination in boar ejaculates without using antibiotics. Furthermore, it is possible to collect boar ejaculates without bacterial contamination by paying strict attention to hygiene.
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Affiliation(s)
- J M Morrell
- Clinical Sciences, Swedish University of Agricultural Sciences, 75007, Uppsala, Sweden.
| | - A Núñez-González
- Institute of Animal Health and Cattle Development (INDEGSAL), Universidad de León, 24071, León, Spain
| | - I Crespo-Félez
- Institute of Animal Health and Cattle Development (INDEGSAL), Universidad de León, 24071, León, Spain
| | | | | | - E Fernández-Alegre
- Institute of Animal Health and Cattle Development (INDEGSAL), Universidad de León, 24071, León, Spain
| | - J C Dominguez
- Institute of Animal Health and Cattle Development (INDEGSAL), Universidad de León, 24071, León, Spain; Department of Animal Medicine, Surgery and Anatomy (Animal Medicine and Surgery), Universidad de León, 24071, León, Spain
| | | | - F Martínez-Pastor
- Institute of Animal Health and Cattle Development (INDEGSAL), Universidad de León, 24071, León, Spain; Department of Molecular Biology (Cell Biology), Universidad de León, 24071, León, Spain
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First Case of Pleural Empyema Caused by Staphylococcus simulans: Review of the Literature. Case Rep Infect Dis 2018; 2018:7831284. [PMID: 30405924 PMCID: PMC6201379 DOI: 10.1155/2018/7831284] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 09/16/2018] [Accepted: 09/23/2018] [Indexed: 11/17/2022] Open
Abstract
Staphylococcus simulans is a coagulase-negative organism, mainly an animal pathogen. Reports of human infection have been infrequent, mainly in patients with repeated animal contact. We report the first case of pleural empyema in an elderly woman. S. simulans tends to cause more severe infection because of a biofilm layer which helps in adherence and colonization of smooth surfaces, especially prosthetic devices, shunts, and catheters. The challenging problem even after CoNS isolation and identification is the assessment of their clinical relevance. Major factors that inhibit the penetration of antibiotics is the large-sized effusions/empyema, thickness of pleura, and the nature of antibiotic itself. Source control for septic patients remains the cornerstone of treatment along with optimal antimicrobial coverage. Staphylococcus simulans, a coagulase-negative staphylococcus, is emerging as an important cause of virulent infections with high mortality in humans. Given its propensity for multidrug resistance, including vancomycin, there is an imperative for early and accurate identification of the isolate. Despite aggressive treatment, the patient succumbed to her illness.
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Abstract
Coagulase-negative staphylococcus organisms may be normal flora of human skin, however these bacteria can also be pathogens in skin and soft tissue infections. A summary of skin and soft tissue infections caused by coagulase-negative staphylococcus species is provided in this review. We conducted a search of the PubMed database using the following terms: abscess, auricularis, biofilm, capitis, cellulitis, coagulase, contaminant, cyst, draining, epidermidis, felon, folliculitis, furuncle, haemolyticus, hominis, indolent, infection, lugdunensis, mecA, microbiome, negative, osteomyelitis, paronychia, saprophyticus, skin, simulans, sinus, soft, staphylococcus, systemic, tissue, virulence, virulent, and vulvar. The relevant papers, and their references, generated by the search were reviewed. Skin and soft tissue infections have been observed to be caused by many coagulase-negative staphylococcus organisms: Staphylococcus auricularis, Staphylococcus capitis, Staphylococcus epidermidis, Staphylococcus haemolyticus, Staphylococcus hominis, Staphylococcus lugdunensis, Staphylococcus saprophyticus, and Staphylococcus simulans. Coagulase-negative staphylococcus skin infections predominantly present as abscesses and paronychia. They are most common in elderly patients or those individuals who are immunosuppressed, and tend to be broadly susceptible to antibiotic treatment. In conclusion, albeit less common, coagulase-negative staphylococcus organisms can result in skin and soft tissue infections, particularly in older and/or immunocompromised individuals. A review of the literature found that coagulase-negative staphylococcus organisms are most commonly grown in cultures of abscesses and paronychia. Therefore, coagulase-negative staphylococcal organisms should not always be considered as contaminants or normal flora, but rather as causative pathogens. They are usually susceptible to antibiotics used to treat methicillin-sensitive Staphylococcus aureus.
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8
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Stępień-Pyśniak D, Wilczyński J, Marek A, Śmiech A, Kosikowska U, Hauschild T. Staphylococcus simulans associated with endocarditis in broiler chickens. Avian Pathol 2016; 46:44-51. [PMID: 27329995 DOI: 10.1080/03079457.2016.1203392] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
This report suggests a strong association between coagulase-negative Staphylococcus simulans and endocarditis in broiler chickens of a single flock. Clinical signs included increased mortality and lameness, and some dead chickens were found on their backs. Lesions included cauliflower-like, fibrinous vegetative lesions on the left atrioventricular valve; cream-coloured, necrotic foci of varying size in the liver; and necrosis of the femoral head. Histopathological examination of the heart revealed multifocal conglomerates of bacterial colonies attached to the valvular endocardium, threads of fibrin, and inflammatory cells with the presence of heterophils. S. simulans strains were first identified by API ID32, and then confirmed with Matrix-Assisted Laser Desorption Ionization Time-of-Flight Mass Spectrometry and by partial sequencing of the rpoB and dnaJ genes. These bacteria were resistant to methicillin but sensitive to vancomycin and characterized by slime production and protease activity.
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Affiliation(s)
- D Stępień-Pyśniak
- a Department of Veterinary Prevention and Avian Diseases , Institute of Biological Bases of Animal Diseases, Faculty of Veterinary Medicine, University of Life Sciences in Lublin , Lublin , Poland
| | - J Wilczyński
- b Veterinary Diagnostic Laboratory Lab - Vet , Tarnowo Podgórne , Poland
| | - A Marek
- a Department of Veterinary Prevention and Avian Diseases , Institute of Biological Bases of Animal Diseases, Faculty of Veterinary Medicine, University of Life Sciences in Lublin , Lublin , Poland
| | - A Śmiech
- c Department of Pathological Anatomy, Faculty of Veterinary Medicine , University of Life Sciences in Lublin , Lublin , Poland
| | - U Kosikowska
- d Department of Pharmaceutical Microbiology with Laboratory for Microbiological Diagnostics , Medical University in Lublin , Lublin , Poland
| | - T Hauschild
- e Department of Microbiology , Institute of Biology, University of Bialystok , Bialystok , Poland
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9
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Neas ED, Dunn JA, Silva ED, Chambers AM, Luckasen GJ, Jaskowiak A. Peroxy Pyruvic Acid-Containing Topical Anti-Infective: A Potential Candidate for a Wound Instillation Solution. Adv Wound Care (New Rochelle) 2016; 5:432-443. [PMID: 27785377 DOI: 10.1089/wound.2015.0682] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Accepted: 02/01/2016] [Indexed: 12/17/2022] Open
Abstract
Objective: Evaluate the therapeutic properties of a peroxy pyruvic acid (PPA)-containing topical anti-infective in a human ex-vivo model that replicates the natural conditions of a human chronic wound. Approach: Wound material was extracted from patients with nonhealing diabetic ulcers, venous stasis ulcers, and arterial wounds. Microbial species were identified, and wound colonization was quantified. Extracted samples were then exposed to a PPA-containing topical anti-infective as an instillation solution with negative pressure wound therapy NPWT at concentrations of 1,000, 1,500, or 2,500 ppm for a period of 1, 5, or 10 min to determine the effect of exposure on isolated pathogens, including effect on proteins. Results: A total of 32 samples were collected from patients. Samples presented with a range of bacteria and fungi representing 14 genera and 22 species, many of which are or are evolving to be resistant to many, if not most, current systemic antibiotics. Thirteen of twenty-three samples (57%) from chronic wounds had bacteria counts ≥105 and most were 6 logs or more. Seven of 10 samples (70%) from acute wounds had bacteria counts ≤105 and most were much lower. Exposure to PPA-containing topical anti-infective at 1,000 ppm killed all bacteria and fungi in all samples within 1 min of exposure. Innovation: PPA-containing topical anti-infective is a potentially valuable clinical option for NPWT. Conclusion: PPA-containing topical anti-infective is a potential candidate for use as an NPWT instillation solution for the treatment of wound infections caused by susceptible pathogens.
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Affiliation(s)
| | - Julie A. Dunn
- UC Health: Medial Center of the Rockies, Loveland, Colorado
| | | | | | - Gary J. Luckasen
- UC Health Research: Medical Center of the Rockies, Loveland, Colorado
| | - Adam Jaskowiak
- UC Health Research: Medical Center of the Rockies, Loveland, Colorado
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Chen J, Dong H, Murfin KE, Feng C, Wu S, Zheng B. Active site analysis of sortase A from Staphylococcus simulans indicates function in cleavage of putative cell wall proteins. Biochem Biophys Res Commun 2016; 478:1653-9. [PMID: 27591898 DOI: 10.1016/j.bbrc.2016.08.175] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Accepted: 08/30/2016] [Indexed: 12/22/2022]
Abstract
Sortase mediated transpeptidation reactions play a significant role in covalent attachment of surface proteins to the cell wall of Gram-positive bacteria. Earlier studies have shown that sortase A (StrA) is required for the virulence of Staphylococci. The human pathogen Staphylococcus simulans CJ16 carries a putative sortase A (SsiStrA) encoding gene, but neither transpeptidation activity nor biochemical characteristics of SsiStrA have been investigated. Here, we identified and characterized StrA from coagulase-negative Staphylococci. SsiStrA was cloned and overexpressed in Escherichia coli BL21 in a soluble form. Size-exclusion chromatography, cross-linking and dynamic light scattering demonstrated that SsiStrA existed as monomer-dimer equilibrium in vitro. We further demonstrated that SsiStrA has sortase activity, and it recognized and cleaved the sorting motif LXPTG. H117, C180 and R193 residues were critical for enzyme activity, and calcium ions enhanced activity.
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Affiliation(s)
- Jian Chen
- Intensive Care Unit, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Huihui Dong
- State Key Laboratory for Diagnosis and Treatment of Infectious Disease, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Kristen E Murfin
- Section of Infectious Diseases, Department of Internal Medicine, Yale University School of Medicine, New Haven, USA
| | - Chunyan Feng
- Institute of Animal Quarantine, Chinese Academy of Inspection and Quarantine, Beijing, China
| | - Shaoqiang Wu
- Institute of Animal Quarantine, Chinese Academy of Inspection and Quarantine, Beijing, China.
| | - Beiwen Zheng
- State Key Laboratory for Diagnosis and Treatment of Infectious Disease, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China.
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Désidéri-Vaillant C, Nédelec Y, Guichon JM, Le Louarn S, Noyer V, Sapin-Lory J, Le Guen P, Nicolas X. Staphylococcus simulans osteitis in a diabetic patient. DIABETES & METABOLISM 2011; 37:560-2. [PMID: 22074636 DOI: 10.1016/j.diabet.2011.09.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2011] [Revised: 09/23/2011] [Accepted: 09/27/2011] [Indexed: 11/25/2022]
Abstract
Staphylococcus simulans was identified as the aetiological agent of osteitis in a diabetic woman. Its identifying characteristics and antibiogram were confirmed. Diabetic foot frequently becomes infected and the spread of infection to bone is a major causal factor behind lower-limb amputation. Early diagnosis and appropriate treatment are essential in such cases.
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Affiliation(s)
- C Désidéri-Vaillant
- Federation of laboratory, Army Hospital Clermont Tonnerre, 29240 Brest cedex 9, France.
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12
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Mallet M, Loiez C, Melliez H, Yazdanpanah Y, Senneville E, Lemaire X. Staphylococcus simulans as an authentic pathogenic agent of osteoarticular infections. Infection 2011; 39:473-6. [PMID: 21830134 DOI: 10.1007/s15010-011-0173-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2011] [Accepted: 07/27/2011] [Indexed: 01/18/2023]
Abstract
OBJECTIVES To evaluate the role of Staphylococcus simulans in bone and joint infections (BJI) and determine their main characteristics. METHODS A search of the database of the microbiology laboratories of Lille hospital and Tourcoing hospital was performed. Only results from blood, bone, and orthopedic device cultures were taken into account for hospitalized patients between January 2004 and January 2009. We considered cases in which S. simulans was the only bacteria isolated in all of the patients' biological samples with clinical and laboratory signs of infection. For patients with complete medical records, we recorded the clinical and epidemiological data. RESULTS Six cases of BJI due to S. simulans were recorded, with five cases related to orthopedic devices infections. Three patients lived in rural areas. In four out of six patients, S. simulans was isolated in intraoperative biopsy material. In one patient, S. simulans grew in synovial fluid and in another in blood cultures only. The latter patient had a spondylodiscitis, and chronic foot ulcers due to gout disease were suspected to be the origin of the infection. All patients were healed after a mean follow up of 9 ± 3 months. Orthopedic devices were removed in four of the five patients concerned. The combination of rifampicin plus levofloxacin was used in four patients. CONCLUSION The present data suggest that, even though S. simulans remains rarely observed in clinical pathology, its role in osteoarticular infections, especially in the case of infected orthopedic devices, is not exceptional. As for the antibiotic treatment, the combination of rifampicin and levofloxacin seems to be an effective strategy according to our clinical results.
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Affiliation(s)
- M Mallet
- Infectious Diseases Department, Dron Hospital, Tourcoing, France
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13
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Isolation ofStaphylococcus simulansfrom Dermatitis in a Captive African Pygmy Hedgehog. J Zoo Wildl Med 2011; 42:277-80. [DOI: 10.1638/2009-0140.1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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14
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Vallianou N, Evangelopoulos A, Makri P, Zacharias G, Stefanitsi P, Karachalios A, Avgerinos PC. Vertebral osteomyelitis and native valve endocarditis due to Staphylococcus simulans: a case report. J Med Case Rep 2008; 2:183. [PMID: 18510763 PMCID: PMC2426703 DOI: 10.1186/1752-1947-2-183] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2007] [Accepted: 05/29/2008] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Staphylococcus simulans is a common animal pathogen that occasionally can colonize human skin. Unlike other coagulase-negative staphylococci, S. simulans tends to cause more severe infections that resemble those caused by S. aureus. We present a case of vertebral osteomyelitis and endocarditis due to S. simulans. To the best of our knowledge, this is the first report of vertebral osteomyelitis associated with native valve endocarditis rather than orthopedic surgery. CASE PRESENTATION A 46-year-old male butcher was admitted to the hospital with a 4-week history of high fever with profound sweating. He reported weakness in his legs and low back pain that compromised his walking ability. Blood cultures yielded Gram-positive cocci on Gram stain. These cocci were identified to the species level as S. simulans, a coagulase-negative staphylococcus. The patient was treated with antibiotics, which were discontinued after 6 months. CONCLUSION This case illustrates the importance of identifying coagulase-negative staphylococci to the species level. Accurate identification of S. simulans would further help investigations defining its pathogenic role in human infections.
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Affiliation(s)
- Natalia Vallianou
- Department of Internal Medicine, Polykliniki General Hospital, Athens, Greece.
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15
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Razonable RR, Lewallen DG, Patel R, Osmon DR. Vertebral osteomyelitis and prosthetic joint infection due to Staphylococcus simulans. Mayo Clin Proc 2001; 76:1067-70. [PMID: 11605694 DOI: 10.4065/76.10.1067] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Staphylococcus simulans, a coagulase-negative staphylococcus, is a common animal pathogen that is rarely encountered in human infections. We describe a 70-year-old man who developed multifocal vertebral osteomyelitis and late prosthetic joint infection caused by this pathogen. The patient was a farmer who had daily contact with cows and drank unpasteurized milk, although the portal of the pathogen's entry remains speculative. Culture of the vertebral disk biopsy specimen and cultures during resection arthroplasty yielded S. simulans. A review of the literature suggests that S. simulans may be more virulent than other species of coagulase-negative staphylococci. Accurate identification of S. simulans isolates would facilitate studies to further define its pathogenic role in human infections.
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Affiliation(s)
- R R Razonable
- Division of Infectious Diseases and Internal Medicine, Mayo Clinic, Rochester, Minn 55905, USA
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Kloos WE, Bannerman TL. Update on clinical significance of coagulase-negative staphylococci. Clin Microbiol Rev 1994; 7:117-40. [PMID: 8118787 PMCID: PMC358308 DOI: 10.1128/cmr.7.1.117] [Citation(s) in RCA: 501] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
The clinical significance of coagulase-negative Staphylococcus species (CNS) continues to increase as strategies in medical practice lead to more invasive procedures. Hospitalized patients that are immunocompromised and/or suffering from chronic diseases are the most vulnerable to infection. Since CNS are widespread on the human body and are capable of producing very large populations, distinguishing the etiologic agent(s) from contaminating flora is a serious challenge. For this reason, culture identification should proceed to the species and strain levels. A much stronger case can be made for the identification of a CNS etiologic agent if the same strain is repeatedly isolated from a series of specimens as opposed to the isolation of different strains of one or more species. Strain identity initially can be based on colony morphology, and then one or more molecular approaches can be used to gain information on the genotype. Many of the CNS species are commonly resistant to antibiotics that are being indicated for staphylococcal infections, with the exception of vancomycin. The widespread use of antibiotics in hospitals has provided a reservoir of antibiotic-resistant genes. The main focus on mechanisms of pathogenesis has been with foreign body infections and the role of specific adhesins and slime produced by Staphylococcus epidermidis. Slime can reduce the immune response and opsonophagocytosis, thereby interfering with host defense mechanisms. As we become more aware of the various strategies used by CNS, we will be in a better position to compromise their defense mechanisms and improve treatment.
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Affiliation(s)
- W E Kloos
- Department of Genetics, North Carolina State University, Raleigh 27695-7614
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