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Gaber Y, TumAllah HM, AbdelAllah NH, Al-Zereini WA, Abu-Lubad MA, Aqel AA, Elkhatib WF, Goering RV, Soliman AM. Emergence and Genomic Characterization of a spa Type t4407 ST6-SCC mec Type IVa Methicillin-Resistant Staphylococcus aureus Strain Isolated from Al-Karak Hospital, Jordan. Medicina (Kaunas) 2024; 60:295. [PMID: 38399582 PMCID: PMC10890080 DOI: 10.3390/medicina60020295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 01/28/2024] [Accepted: 01/29/2024] [Indexed: 02/25/2024]
Abstract
Background and Objectives: Methicillin-resistant Staphylococcus aureus (MRSA) is a major concern in Jordanian hospitals in terms of infection control. The purpose of this study was to identify the resistance patterns of Staphylococcus aureus strains isolated from surfaces of critical locations within the Al-Karak Governmental Hospital in 2019. Additionally, the study aimed to conduct whole-genome sequencing on the isolates. Materials and Methods: In February 2019, fourteen S. aureus strains were isolated from surfaces in critical sites in the Al-Karak Governmental Hospital. These isolates underwent antibiogram testing to determine their resistance profile. Genome sequencing using the Illumina MiSeq platform was applied to the extracted DNA from these isolates. The genomic data, including coding sequences, were analyzed to identify lineage, resistance genes, and plasmids. Results: The antibiogram results revealed that 11 of the 14 isolates were resistant to oxacillin, 6 to linezolid, and 1 to rifampicin, while none showed resistance to chloramphenicol. Eleven isolates were identified as MRSA, with a novel spa type (t4407) not previously reported in Jordan. High-quality sequencing data were obtained for only one isolate, i.e., A29, the genome showed 2,789,641 bp with a 32.7% GC content and contained 2650 coding sequences. Genomic analysis indicated the ST6 lineage, mecA gene (SCCmec type IVa(2B)), and a hybrid plasmid (pJOR_blaZ) carrying the blaZ gene for β-lactam resistance. Genomic data were deposited in NCBI (CP104989). The A29 genome closely resembled an MRSA genome isolated from a Danish hospital in 2011. The SNP analysis revealed identical antimicrobial resistance genes in these two genomes. Conclusions: This study unveils the first genomic sequence of an MRSA isolate from Jordan, marked by distinctive genotypic traits. The findings enhance our understanding of the MRSA types circulating in Jordan and the region and substantiate the phenomenon of intercontinental MRSA transmission.
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Affiliation(s)
- Yasser Gaber
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy, Mutah University, Al-Karak 61710, Jordan
- Department of Microbiology and Immunology, Faculty of Pharmacy, Beni-Suef University, Beni-Suef 62511, Egypt
| | - Heba M TumAllah
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy, Mutah University, Al-Karak 61710, Jordan
| | - Nourhan H AbdelAllah
- Department of Microbiology and Immunology, Faculty of Pharmacy, Beni-Suef University, Beni-Suef 62511, Egypt
- Clinical Trials Department, Central Administrative of Biological, Innovative Products and Clinical Trials, Egyptian Drug Authority, Giza 12654, Egypt
| | - Wael A Al-Zereini
- Department of Biological Sciences, Faculty of Sciences, Mutah University, Al-Karak 61710, Jordan
| | - Mohammad A Abu-Lubad
- Department of Microbiology and Pathology, Faculty of Medicine, Mutah University, Al-Karak 61710, Jordan
| | - Amin A Aqel
- Department of Microbiology and Pathology, Faculty of Medicine, Mutah University, Al-Karak 61710, Jordan
| | - Walid F Elkhatib
- Microbiology and Immunology Department, Faculty of Pharmacy, Ain Shams University, African Union Organization St., Abbassia, Cairo 11566, Egypt
- Department of Microbiology & Immunology, Faculty of Pharmacy, Galala University, New Galala City, Suez 43713, Egypt
| | - Richard V Goering
- Department of Medical Microbiology and Immunology, Creighton University School of Medicine, Omaha, NE 68178, USA
| | - Ahmed M Soliman
- Department of Microbiology and Immunology, Faculty of Pharmacy, Kafr-Elsheikh University, Kafr El-Sheikh 33516, Egypt
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Donovan CV, MacFarquhar JK, Wilson E, Sredl M, Tanz LJ, Mullendore J, Fleischauer A, Smith JC, Lucas C, Kunz J, Moore Z. Legionnaires' Disease Outbreak Associated With a Hot Tub Display at the North Carolina Mountain State Fair, September 2019. Public Health Rep 2024; 139:79-87. [PMID: 36971250 PMCID: PMC10905752 DOI: 10.1177/00333549231159159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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] [Indexed: 12/29/2023] Open
Abstract
OBJECTIVES On September 23, 2019, the North Carolina Division of Public Health identified a legionellosis increase in western North Carolina; most patients had recently attended the North Carolina Mountain State Fair. We conducted a source investigation. METHODS Cases were fair attendees with laboratory-confirmed legionellosis and symptom onset within 2 to 14 days (Legionnaires' disease) or ≤3 days (Pontiac fever). We conducted a case-control study matching cases to non-ill fair attendees as control participants and an environmental investigation, and we performed laboratory testing (Legionella bacteria culture and polymerase chain reaction) of 27 environmental samples from fairgrounds and hot tubs and 14 specimens from case patients. We used multivariable unconditional logistic regression models to calculate adjusted odds ratios for potential Legionella exposure sources and risk factors. RESULTS Of 136 people identified with fair-associated legionellosis, 98 (72%) were hospitalized and 4 (3%) died. Case patients were more likely than control participants to report walking by hot tub displays (adjusted odds ratio = 10.0; 95% CI, 4.2-24.1). Complete hot tub water treatment records were not kept, precluding evaluation of water maintenance conducted on display hot tubs. Legionella pneumophila sequence types (STs) were consistent among 10 typed clinical specimens (ST224) but distinct from the only positive environmental sample from the fair (ST7 and ST8). CONCLUSIONS Hot tub displays were identified as the most likely outbreak source, making this the largest hot tub-associated Legionnaires' disease outbreak worldwide. Following the investigation, the North Carolina Division of Public Health and the Centers for Disease Control and Prevention released guidance on mitigating risk of Legionella exposure from hot tub displays. Results highlight the importance of properly maintaining equipment that aerosolizes water, including hot tubs intended for display purposes only.
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Affiliation(s)
- Catherine V. Donovan
- North Carolina Department of Health and Human Services, Raleigh, NC, USA
- Epidemic Intelligence Service, Centers for Disease Control and Prevention, Atlanta, GA, USA
- Now with the Division of State and Local Readiness, Office of Readiness and Response, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Jennifer K. MacFarquhar
- North Carolina Department of Health and Human Services, Raleigh, NC, USA
- Division of State and Local Readiness, Office of Readiness and Response, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Erica Wilson
- North Carolina Department of Health and Human Services, Raleigh, NC, USA
| | - Megan Sredl
- North Carolina Department of Health and Human Services, Raleigh, NC, USA
| | - Lauren J. Tanz
- North Carolina Department of Health and Human Services, Raleigh, NC, USA
- Epidemic Intelligence Service, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | | | - Aaron Fleischauer
- North Carolina Department of Health and Human Services, Raleigh, NC, USA
- Division of State and Local Readiness, Office of Readiness and Response, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Jessica C. Smith
- Division of Bacterial Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Claressa Lucas
- Division of Bacterial Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Jasen Kunz
- Division of Foodborne, Waterborne, and Environmental Diseases, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Zack Moore
- North Carolina Department of Health and Human Services, Raleigh, NC, USA
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3
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Rahmani Z, Hosseini SS, Bagheri P, Goudarzi M. Genetic diversity of Staphylococcus aureus isolated from ear infections in Iran: Emergence of CC8/ST239-SCCmec III as major genotype. Acta Microbiol Immunol Hung 2023; 70:231-238. [PMID: 37721867 DOI: 10.1556/030.2023.02081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 06/15/2023] [Accepted: 08/08/2023] [Indexed: 09/20/2023]
Abstract
Increase in antibiotic resistance in Staphylococcus aureus isolated from ear infection is a serious public health problem. The objective of this investigation was to determine the antibacterial resistance profile and genetic variability of the S. aureus isolated from adult patients with otitis externa (OE) and otitis media (OM) infections, Tehran- Iran. The disk diffusion was employed to detect the susceptibility of 45 S. aureus strains. Biofilm production was evaluated by microtiter plate assay. Genetic diversity of the isolates was determined by staphylococcal cassette SCCmec, spa, and MLST techniques. Resistance to mupirocin and vancomycin were identified in 40 and 2.2% of isolates. Out of the 45 S. aureus isolates, 41 (91.2%) strains were considered as positive biofilm strains at different levels. According to our results, S. aureus isolated from OM (44.4%, 20/45) were including CC8/ST239-SCCmecIII corresponded to spa types t860, t030, t037, t234, t421 (70%, 14/20) and CC/ST30-SCCmecIV corresponded to spa types t605 and t019 (30%, 6/20) while S. aureus isolated from OE (55.6%, 25/45) were including CC/ST30-SCCmecIV corresponded to spa types t605, t345 and t1130 (52%, 13/25), CC/ST22-SCCmecIV corresponded to spa type t790 (20%, 5/25), CC8/ST8-SCCmecIV corresponded to spa type t008 (16%, 4/25), and CC/ST45-SCCmecIV corresponded to spa types t004 and t038 (12%, 3/25). This study highlighted genetic variability and strong biofilm formation ability among our isolates revealing its crucial role in enhancing the resistance of this bacteria to drugs. Thus, it is necessary to continue the epidemiological analysis to improve the control of ear infections related to S. aureus.
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Affiliation(s)
- Zahra Rahmani
- 1Infectious Diseases and Tropical Medicine Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- 2Department of Otorhinolaryngology, Loghman Hospital, Shahid-Beheshti University of Medical Sciences, Tehran, Iran
| | - Sareh Sadat Hosseini
- 3Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Parmida Bagheri
- 4Department of Biotechnology, Faculty of Life Sciences and Biotechnology, Shahid Beheshti University, Tehran, Iran
| | - Mehdi Goudarzi
- 1Infectious Diseases and Tropical Medicine Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- 3Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Mormile I, Tuccillo F, Della Casa F, D’Aiuto V, Montuori N, De Rosa M, Napolitano F, de Paulis A, Rossi FW. The Benefits of Water from Nitrodi's Spring: The In Vitro Studies Leading the Potential Clinical Applications. Int J Mol Sci 2023; 24:13685. [PMID: 37761993 PMCID: PMC10531131 DOI: 10.3390/ijms241813685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 08/28/2023] [Accepted: 08/29/2023] [Indexed: 09/29/2023] Open
Abstract
Natural products (water, plants, and minerals) have been studied for diverse applications in health and disease. Since there has been a growing interest in the introduction of thermal water as a clinical complementary approach in the treatment of low-grade inflammation and stress-related conditions, this review focuses on the oldest spa in the world: Nitrodi's spring. Substantial studies in the 1960s showed that both the internal and external use of Nitrodi's water yielded several benefits in physiological processes and in treating certain disorders, mainly allergic and autoimmune inflammatory conditions. More recently, a novel interest in Nitrodi's water has prompted researchers to further explore the effects of this water and shed light on the molecular mechanisms sustaining its therapeutic efficacy. In different epithelial cell models, Nitrodi's water had strong promotional effects on proliferation, cell migration, cell viability, and fibroblast to myofibroblast transition, all of which essential for wound healing and tissue remodeling. Moreover, Nitrodi's water exhibited anti-oxidant and anti-inflammatory properties through the inhibition of ROS production and protein S-nitrosylation. Here, we have collected the clinical and basic data on Nitrodi's water and reviewed articles that have discussed its use as a potential treatment for several inflammatory and autoimmune diseases and age-related skin deterioration.
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Affiliation(s)
- Ilaria Mormile
- Department of Translational Medical Sciences, University of Naples Federico II, 80131 Naples, Italy; (I.M.); (F.D.C.); (N.M.); (A.d.P.); (F.W.R.)
| | - Fabiana Tuccillo
- Department of Law, University of Naples Federico II, 80138 Naples, Italy;
| | - Francesca Della Casa
- Department of Translational Medical Sciences, University of Naples Federico II, 80131 Naples, Italy; (I.M.); (F.D.C.); (N.M.); (A.d.P.); (F.W.R.)
| | - Valentina D’Aiuto
- Post-Graduate Program in Clinical Immunology and Allergy, University of Naples Federico II, 80131 Naples, Italy;
| | - Nunzia Montuori
- Department of Translational Medical Sciences, University of Naples Federico II, 80131 Naples, Italy; (I.M.); (F.D.C.); (N.M.); (A.d.P.); (F.W.R.)
- Center for Basic and Clinical Immunology Research (CISI), WAO Center of Excellence, University of Naples Federico II, 80131 Naples, Italy
| | - Marina De Rosa
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, 80131 Naples, Italy;
| | - Filomena Napolitano
- Department of Translational Medical Sciences, University of Naples Federico II, 80131 Naples, Italy; (I.M.); (F.D.C.); (N.M.); (A.d.P.); (F.W.R.)
| | - Amato de Paulis
- Department of Translational Medical Sciences, University of Naples Federico II, 80131 Naples, Italy; (I.M.); (F.D.C.); (N.M.); (A.d.P.); (F.W.R.)
- Center for Basic and Clinical Immunology Research (CISI), WAO Center of Excellence, University of Naples Federico II, 80131 Naples, Italy
| | - Francesca Wanda Rossi
- Department of Translational Medical Sciences, University of Naples Federico II, 80131 Naples, Italy; (I.M.); (F.D.C.); (N.M.); (A.d.P.); (F.W.R.)
- Center for Basic and Clinical Immunology Research (CISI), WAO Center of Excellence, University of Naples Federico II, 80131 Naples, Italy
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5
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Tissinier-Vivent M, Houle MC, Du-Thanh A, Raison-Peyron N. Persulphates allergic contact dermatitis from spa: A new aetiology of nummular contact dermatitis. Contact Dermatitis 2023; 89:128-130. [PMID: 37170420 DOI: 10.1111/cod.14334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 05/01/2023] [Accepted: 05/03/2023] [Indexed: 05/13/2023]
Affiliation(s)
- Marianne Tissinier-Vivent
- Department of Dermatology, Montpellier University Hospital and Montpellier University, Montpellier, France
| | - Marie-Claude Houle
- Department of Medicine, Division of Dermatology, CHU de Québec, Laval University, Québec, Queensland, Canada
| | - Aurélie Du-Thanh
- Department of Dermatology, Montpellier University Hospital and Montpellier University, Montpellier, France
| | - Nadia Raison-Peyron
- Department of Dermatology, Montpellier University Hospital and Montpellier University, Montpellier, France
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6
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Fillol F, Paris L, Pascal S, Mulliez A, Roques CF, Rousset S, Duclos M. Possible Impact of a 12-Month Web- and Smartphone-Based Program to Improve Long-term Physical Activity in Patients Attending Spa Therapy: Randomized Controlled Trial. J Med Internet Res 2022; 24:e29640. [PMID: 35708743 PMCID: PMC9247816 DOI: 10.2196/29640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Revised: 10/06/2021] [Accepted: 04/19/2022] [Indexed: 11/13/2022] Open
Abstract
Background Lack of physical activity (PA) and sedentary behaviors are leading risk factors for noncommunicable diseases (NCDs). Web- and smartphone-based interventions are effective in increasing PA in older adults and in patients with NCD. In many countries, spa therapy, commonly prescribed to patients with NCD, represents an ideal context to initiating lifestyle changes. Objective This study aimed to evaluate, in patients attending spa therapy, the effectiveness of an intervention combining a face-to-face coaching and, when returning home, a web- and smartphone-based PA program on the achievement of PA guidelines (PAG) 12 months after the end of spa therapy. Methods This was a 12-month, prospective, parallel-group randomized controlled trial. Patients were enrolled during spa therapy and randomized 1:1 to intervention or control group who received PA usual advice. From the end of spa therapy, PA, weight, waist circumference, and quality of life of the participants were assessed by phone every 2 months. Primary outcome was meeting PAG (PA ≥600 metabolic equivalent of task) at 12 months. Secondary outcomes were meeting current PAG at 6 months; sedentary time, weight, waist circumference, PA, and quality of life at 6 and 12 months. Objective use data of the web- and smartphone-based PA program were collected. Analytic methods included intention to treat and constrained longitudinal data analyses. Results The study sample included 228 participants (n=176, 77.2% females) with a mean age of 62.4 (SD 6.7) years and a mean BMI of 28.2 (SD 4.2) kg/m2. Approximately 53.9% (123/228) of the participants were retired. No group differences were found for any baseline variable. At 12 months, the proportion of patients achieving PAG was significantly higher in intervention group than in the control group (81% vs 67% respectively, odds ratio 2.34, 95% CI 1.02-5.38; P=.045). No difference between intervention and control group was found neither in achieving PAG at 6 months nor for sedentary time, weight, and waist circumference at 6 and 12 months. Regarding quality of life, the physical component subscale score was significantly higher at 12 months in the intervention group than in the control group (mean difference: 4.1, 95% CI 1.9-6.3; P<.001). The mean duration use of the program was 7.1 (SD 4.5) months. Attrition rate during the first 2 months was 20.4% (23/113) whereas 39.8% (45/113) of the participants used the program for at least 10 months. Conclusions PA increased in both the intervention group and the control group. However, at 12 months, more participants met PAG in the intervention group compared with the controls. This indicates that the web- and smartphone-based program could have maintained PA in the intervention group. In addition, a spa therapy seems to be an ideal time and framework to implement PA education. Trial Registration ClinicalTrials.gov NCT02694796; https://clinicaltrials.gov/ct2/show/NCT02694796
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Affiliation(s)
| | | | | | - Aurélien Mulliez
- Biostatistics Unit (Clinical Research and Innovation Direction), University-Hospital Clermont-Ferrand, Clermont-Ferrand, France
| | - Christian-François Roques
- Physical and Rehabilitation Medicine, Paul Sabatier University, Toulouse University, Toulouse, France
| | - Sylvie Rousset
- Human Nutrition Unity, Centre de Recherche en Nutrition Humaine Auvergne, French National Institute for Agriculture, Food and Environment (INRAE), Clermont-Ferrand, France
| | - Martine Duclos
- Human Nutrition Unity, Centre de Recherche en Nutrition Humaine Auvergne, French National Institute for Agriculture, Food and Environment (INRAE), Clermont-Ferrand, France.,Department of Sport Medicine and Functional Explorations, University-Hospital Clermont-Ferrand, G. Montpied Hospital, Clermont-Ferrand, France.,Unité fonctionnelle de Recherche Médecine, Clermont University, University of Auvergne, Clermont-Ferrand, France
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7
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Zhao X, Hu M, Zhao C, Zhang Q, Li L, Zhang Y, Luo Y, Liu Y. Whole-Genome Epidemiology and Characterization of Methicillin-Susceptible Staphylococcus aureus ST398 From Retail Pork and Bulk Tank Milk in Shandong, China. Front Microbiol 2021; 12:764105. [PMID: 34917050 PMCID: PMC8670001 DOI: 10.3389/fmicb.2021.764105] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Accepted: 11/03/2021] [Indexed: 11/13/2022] Open
Abstract
Staphylococcus aureus (S. aureus) is now regarded as a zoonotic agent. Methicillin-susceptible S. aureus (MSSA) ST398 is a livestock-associated bacterium that is most prevalent in China, but there are currently no data available for Shandong. Therefore, the aim of this study was to investigate the epidemiology and characterization of MSSA ST398 from retail pork and bulk tank milk (BTM) in Shandong. A total of 67 S. aureus isolates were collected from retail pork between November 2017 and June 2018. Among the isolates, high antimicrobial resistance rates were observed for penicillin (97.0%), and 92.5% of the isolates were multi-drug resistant (MDR). Eight sequence types (STs) were identified in the retail pork isolates, and the predominant type was ST15 (n=26), which was followed by ST398 (n=14). Staphylococcal protein A gene (spa) typing identified spa types t034 and t1255 in MSSA ST398 from retail pork. Using whole-genome sequencing analysis, we described the phylogeny of 29 MSSA ST398 isolates that were obtained from retail pork (n=14) and BTM (n=15). The phylogenetic tree showed that the MSSA ST398 isolates from different sources had the same lineage. Among the 29 MSSA ST398 isolates, five resistance genes were detected, and all isolates carried DHA-1. Fifteen toxin genes were detected, and all isolates carried eta, hla, and hlb. In conclusion, this study found that a high risk for MSSA ST398 was present in retail pork and BTM. These findings have major implications for how investigations of MSSA ST398 outbreaks should be conducted in the One-Health context.
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Affiliation(s)
- Xiaonan Zhao
- Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Shandong, China
| | - Ming Hu
- Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Shandong, China
| | - Cui Zhao
- Tai'an animal disease prevention and control center, Shandong, China
| | - Qing Zhang
- Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Shandong, China
| | - Lulu Li
- Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Shandong, China
| | - Yin Zhang
- Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Shandong, China
| | - Yanbo Luo
- Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Shandong, China
| | - Yuqing Liu
- Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Shandong, China
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8
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Guo Y, Wang B, Rao L, Wang X, Zhao H, Li M, Yu F. Molecular Characteristics of Rifampin-Sensitive and -Resistant Isolates and Characteristics of rpoB Gene Mutations in Methicillin-Resistant Staphylococcus aureus. Infect Drug Resist 2021; 14:4591-4600. [PMID: 34764656 PMCID: PMC8576291 DOI: 10.2147/idr.s336200] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Accepted: 10/22/2021] [Indexed: 12/04/2022] Open
Abstract
Introduction Methicillin-resistant Staphylococcus aureus (MRSA) infections have become a leading cause of severe infections in both healthcare and community settings. Mutations in the rpoB gene cause resistance to rifampin (RIFR), a critical antibiotic for the treatment of multidrug-resistant Staphylococcus aureus. The aim of this study was to detect the molecular characteristics of RIFR MRSA and analyze the rpoB gene mutations involved in RIF resistance. Methods A total of 49 RIFR MRSA and 38 RIFS MRSA isolates collected from seven cities in China were analyzed by multilocus sequence typing, staphylococcus chromosomal cassette mec (SCCmec) typing, spa typing, and rpoB gene mutations. Results ST239-III-t030 (35/49, 71.4%), the major clone in RIFR MRSA isolates; ST45-IV-t116 (16/38, 42.1%), the major clone in RIFS MRSA isolates with rpoB mutations. RIFR MRSA isolates were resistant to erythromycin, ciprofloxacin, tetracycline, gentamicin, and clindamycin. By contrast, RIFS MRSA isolates with rpoB mutation were more susceptible to ciprofloxacin, tetracycline, and gentamicin. Forty-three (87.8%) isolates present the mutational change H481N and L466S, conferring 128–512 μg/mL RIF resistance. The four isolates with RIF MIC ≥ 1024 μg/mL had additional amino acid substitution: H481N, L466S, A473T (n=2); H481Y (n=2), associated with a high-level RIF resistance. Of 38 RIFS MRSA isolates, two mutations were observed, including H481N (n=37) and A477D (n=1). Conclusion In conclusion, the predominant RIFR MRSA clones in China were ST239-III-t030. Molecular characteristics, antibiotic-resistant profiles, and rpoB mutations between RIFR MRSA and RIFS MRSA were diverse. Antibiotics for treating patients with MRSA infections can be selected based on molecular characteristics.
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Affiliation(s)
- Yinjuan Guo
- Department of Clinical Laboratory, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, 200433, People's Republic of China
| | - Bingjie Wang
- Department of Clinical Laboratory, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, 200433, People's Republic of China
| | - Lulin Rao
- Department of Clinical Laboratory, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, 200433, People's Republic of China
| | - Xinyi Wang
- Department of Clinical Laboratory, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, 200433, People's Republic of China
| | - Huilin Zhao
- Department of Clinical Laboratory, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, 200433, People's Republic of China
| | - Meilan Li
- Respiratory Intensive Care Unit, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, 200433, People's Republic of China
| | - Fangyou Yu
- Department of Clinical Laboratory, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, 200433, People's Republic of China
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9
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Sun Y, Liu M, Niu M, Zhao X. Phenotypic Switching of Staphylococcus aureus Mu50 Into a Large Colony Variant Enhances Heritable Resistance Against β-Lactam Antibiotics. Front Microbiol 2021; 12:709841. [PMID: 34690952 PMCID: PMC8530407 DOI: 10.3389/fmicb.2021.709841] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Accepted: 09/13/2021] [Indexed: 11/24/2022] Open
Abstract
Phenotypic heterogeneity within a bacterial population may confer new functionality and allow microorganisms to adapt to fluctuating environments. Previous work has suggested that Staphylococcus aureus could form small colony variants to avoid elimination by therapeutic antibiotics and host immunity systems. Here we show that a reversible non-pigment large colony morphology (Mu50∆lcpA-LC) was observed in S. aureus Mu50 after knocking out lcpA, coding for the LytR-CpsA-Psr family A protein. Mu50∆lcpA-LC increased resistance to β-lactam antibiotics, in addition, the enlarged cell size, enhanced spreading ability on solid medium, and reduced biofilm formation, suggesting better abilities for bacterial expansion. Moreover, the expression of spa encoding protein A was significantly increased in Mu50∆lcpA-LC. This study shows that besides the small colony variants, S. aureus could fight against antibiotics and host immunity through phenotype switching into a large colony variant.
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Affiliation(s)
- Yajun Sun
- College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Miaomiao Liu
- College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Mingze Niu
- College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Xin Zhao
- College of Animal Science and Technology, Northwest A&F University, Yangling, China.,Department of Animal Science, McGill University, Montreal, QC, Canada
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10
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Diehl K, Breitbart EW, de Buhr Y, Schneider S, Görig T. Shift in place of tanning bed use from tanning salons to spa, fitness, and beauty facilities: A trend perspective. Photodermatol Photoimmunol Photomed 2021; 38:83-85. [PMID: 34157183 DOI: 10.1111/phpp.12711] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 05/05/2021] [Accepted: 06/19/2021] [Indexed: 10/21/2022]
Affiliation(s)
- Katharina Diehl
- Mannheim Institute of Public Health, Social and Preventive Medicine, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | | | - Yvonne de Buhr
- Arbeitsgemeinschaft Dermatologische Prävention (ADP) e.V, Hamburg, Germany
| | - Sven Schneider
- Mannheim Institute of Public Health, Social and Preventive Medicine, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Tatiana Görig
- Mannheim Institute of Public Health, Social and Preventive Medicine, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
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11
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Hao Z, Guo Y, Rao L, Yu J, Zhan Q, Xu Y, Wang B, Wu X, Yu F. Deletion of SarX Decreases Biofilm Formation of Staphylococcus aureus in a Polysaccharide Intercellular Adhesin (PIA)-Dependent Manner by Downregulating spa. Infect Drug Resist 2021; 14:2241-2250. [PMID: 34163189 PMCID: PMC8214526 DOI: 10.2147/idr.s305650] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [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: 02/22/2021] [Accepted: 05/14/2021] [Indexed: 11/23/2022] Open
Abstract
Introduction Biofilm formation by Staphylococcus aureus is an important virulence determinant mediated by the polysaccharide intercellular adhesin (PIA) encoded by the ica operon or mediated by surface and extracellular proteins. SarX is a 250-residue two-domain SarA homolog that activates spa transcription. Previous studies demonstrated that Staphylococcus epidermidis SarX protein regulated the transcriptional activity of the agr and ica loci and controlled the biofilm phenotype, primarily by regulating icaADBC transcription and PIA production. Results In this study, biofilm formation and detachment of the clinical isolate S. aureus SA75 were significantly decreased in the sarX mutant strain. The effect of sarX mutation on S. aureus biofilm formation was related to the production of PIA and not to that of eDNA. Deletion of sarX was associated with a 1.8-fold reduction in spa transcription as determined by RT-PCR analysis, and this reduction could be restored by chromosomal complementation of sarX. Expression of Spa protein was also decreased in the S. aureus sarX mutant. Conclusion sarX promoted biofilm production of S. aureus that may primarily be mediated through increasing ica operon expression and PIA production. Furthermore, deletion of sarX reduced S. aureus biofilm formation by downregulating spa.
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Affiliation(s)
- Zhihao Hao
- Department of Laboratory Medicine, Shandong Provincial Third Hospital, Cheeloo College of Mdicine, Shandong University, Ji Nan, 250000, People's Republic of China
| | - Yinjuan Guo
- Department of Laboratory Medicine, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, 200082, People's Republic of China
| | - Lulin Rao
- Department of Laboratory Medicine, Wenzhou Medical University, Wenzhou, 325000, People's Republic of China
| | - Jingyi Yu
- Department of Laboratory Medicine, Wenzhou Medical University, Wenzhou, 325000, People's Republic of China
| | - Qing Zhan
- Department of Laboratory Medicine, Nanchang University, Nanchang, 330000, People's Republic of China
| | - Yanlei Xu
- Department of Laboratory Medicine, Nanchang University, Nanchang, 330000, People's Republic of China
| | - Bingjie Wang
- Department of Laboratory Medicine, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, 200082, People's Republic of China
| | - Xiaocui Wu
- Department of Laboratory Medicine, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, 200082, People's Republic of China
| | - Fangyou Yu
- Department of Laboratory Medicine, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, 200082, People's Republic of China
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12
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Nørreslet LB, Edslev SM, Clausen ML, Flachs EM, Ebbehøj NE, Andersen PS, Agner T. Hand eczema and temporal variation of Staphylococcus aureus clonal complexes: A prospective observational study. J Am Acad Dermatol 2021; 87:1006-1013. [PMID: 33878413 DOI: 10.1016/j.jaad.2021.04.037] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 01/15/2021] [Revised: 03/18/2021] [Accepted: 04/08/2021] [Indexed: 11/19/2022]
Abstract
BACKGROUND Hand eczema (HE) is frequently associated with Staphylococcus aureus; however, its role in the pathogenesis of HE is poorly understood. OBJECTIVE To investigate the temporal variation in S aureus subtypes, ie, clonal complex (CC) types, on the hands and relate it to S aureus colonization in the nose and severity in a cohort of HE patients. METHODS S aureus from the hands and nose of 50 adult HE patients and 50 controls was prospectively identified at 5 visits over 3 weeks. RESULTS S aureus was identified on the hands of 23 (46%) patients at 2 or more visits and on the hands of 1 control once. Of the HE patients with S aureus colonization, 78% had the same S aureus CC type over time. Twenty-one patients had the same S aureus CC type on the hands and in the nose. Persistent colonization was strongly related to an increased disease severity. LIMITATIONS A relatively small S aureus culture-positive population. CONCLUSION The temporal stability of S aureus CC type and high occurrence of the identical subtypes on the hands and in the nose imply that S aureus colonization in patients with HE is of a more permanent nature. Taken together with the finding that persistent colonization and HE severity are clearly related, our results indicate that S aureus may contribute to the perpetuating course of HE.
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Affiliation(s)
- Line B Nørreslet
- Department of Dermatology, Bispebjerg Hospital, University of Copenhagen, Copenhagen, Denmark.
| | - Sofie M Edslev
- Department of Bacteria, Parasites, and Fungi, Statens Serum Institut, Copenhagen, Denmark
| | - Maja-Lisa Clausen
- Department of Dermatology, Bispebjerg Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Esben M Flachs
- Department of Occupational and Environmental Medicine, Bispebjerg Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Niels E Ebbehøj
- Department of Occupational and Environmental Medicine, Bispebjerg Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Paal S Andersen
- Department of Bacteria, Parasites, and Fungi, Statens Serum Institut, Copenhagen, Denmark
| | - Tove Agner
- Department of Dermatology, Bispebjerg Hospital, University of Copenhagen, Copenhagen, Denmark
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13
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Anaya-Aguilar R, Gemar G, Anaya-Aguilar C. Challenges of Spa Tourism in Andalusia: Experts' Proposed Solutions. Int J Environ Res Public Health 2021; 18:ijerph18041829. [PMID: 33668536 PMCID: PMC7917781 DOI: 10.3390/ijerph18041829] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Revised: 02/07/2021] [Accepted: 02/10/2021] [Indexed: 11/16/2022]
Abstract
Water is the common thread and attraction factor of the tourism facilities called "spas", which are part of health and beauty services. Spa use is currently experiencing a boom that reflects changes in populations, such as an increase in economic wellbeing and a desire to reunite with nature. This research's objectives were to understand spa tourism's structural and operational dimensions and to assess this sector's current situation by using the Delphi method with a panel of 22 experts. The results show that these experts believe that, in Andalusia, spas energize the area as a tourism destination through their natural resources and conservation of key elements. However, spa development policies are scarce, including a lack of autonomous community laws regarding these facilities.
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14
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Goudarzi M, Navidinia M, Dadashi M, Hashemi A, Pouriran R. First report of methicillin-resistant Staphylococcus aureus carrying the mecC gene in human samples from Iran: prevalence and molecular characteristics. New Microbes New Infect 2020; 39:100832. [PMID: 33425366 PMCID: PMC7777544 DOI: 10.1016/j.nmni.2020.100832] [Citation(s) in RCA: 0] [Impact Index Per Article: 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: 09/03/2020] [Revised: 11/30/2020] [Accepted: 12/01/2020] [Indexed: 11/25/2022] Open
Abstract
There is a lack of information concerning mecC clinical methicillin-resistant Staphylococcus aureus (MRSA) strains throughout the world. In the present survey, 345 MRSA strains were characterized by antimicrobial susceptibility testing and staphylococcal cassette chromosome mec element (SCCmec) typing. mecC-positive MRSA isolates were characterized by study of biofilm formability, adhesion and virulence analysis, multilocus sequence typing, accessory gene regulator (agr) typing, S. aureus protein A locus (spa) typing and staphylocoagulase typing. The present study found ten SCCmec types, with the majority being SCCmec type III (38.3%). The presence of mecC was confirmed in three isolates from skin wounds (two isolates) and burn wounds (one isolate). All the mecC-positive isolates carried SCCmec XI and belonged to coa type III. Molecular typing showed that these isolates belonged to clonal complex/ST130-spa type t843-agr type III (two isolates) and clonal complex/ST599-spa type 5930-agr type I. The presence of SCCmec type IV confirms the hypothesis of extensive infiltration from the community to the hospital. Detection of MRSA isolates harbouring the mecC gene highlights the need to perform routine detection methods and molecular investigations in order to identify these emerging strains and limit their transfer in hospitals and communities.
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Affiliation(s)
- M Goudarzi
- Infectious Diseases and Tropical Medicine Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.,Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - M Navidinia
- School of Allied Medical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - M Dadashi
- Department of Microbiology, School of Medicine, Alborz University of Medical Sciences, Karaj, Iran
| | - A Hashemi
- Infectious Diseases and Tropical Medicine Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - R Pouriran
- School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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15
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Tayebi Z, Goudarzi H, Dadashi M, Goudarzi M. Genotype distribution of methicillin-susceptible Staphylococcus aureus clinical isolates in Iran: high multiresistant clonal complex 8. BMC Res Notes 2020; 13:277. [PMID: 32513293 PMCID: PMC7282160 DOI: 10.1186/s13104-020-05127-w] [Citation(s) in RCA: 3] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2020] [Accepted: 06/04/2020] [Indexed: 12/17/2022] Open
Abstract
Objective Compared to methicillin-resistant Staphylococcus aureus (MRSA), there have been few studies focused on the molecular characterization of methicillin-susceptible Staphylococcus aureus (MSSA). In this cross-sectional study, 85 MSSA isolates were characterized by antimicrobial susceptibility testing, virulence genes analysis, accessory gene regulator (agr) typing, and S. aureus protein A locus (spa) typing. Results In present study, 9 different clonal complexes namely CC8-MSSA-t037 (22.4%), CC8-MSSA-t008 (11.8%), CC7-MSSA-t091 and CC30-MSSA-t021 (each 9.4%), CC8-MSSA-t037 (8.3%), CC398-MSSA-t034 (7.1%), CC22-MSSA-t005 (5.9%), CC5-MSSA-t002 and CC15-MSSA-t084 (each 4.7%), CC22-MSSA-t790 and CC59-MSSA-t437 (each 3.5%), CC22-MSSA-t1869, CC5-MSSA-t045, and CC45-MSSA-t015 (each 2.3%), CC30-MSSA-t318 and CC15-MSSA-t491 (each 1.2%) were found. agr types detected in tested strains were mainly type I (76.5%), II (12.9%), and III (10.6%). Of 85 MSSA examined isolates, 48 (56.5%) isolates were toxinogenic with 27 producing pvl (31.8%) and 21 tst (24.7%). The findings of the study show a high genetic diversity in MSSA strains warranting continued surveillance to provide critical insights into control and treatment of MSSA infections.
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Affiliation(s)
- Zahra Tayebi
- Microbiology Department, Tehran Medical Sciences Branch, Islamic Azad University, Tehran, Iran
| | - Hossein Goudarzi
- Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Masoud Dadashi
- Department of Microbiology, School of Medicine, Alborz University of Medical Sciences, Karaj, Iran
| | - Mehdi Goudarzi
- Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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16
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Omidi M, Firoozeh F, Saffari M, Sedaghat H, Zibaei M, Khaledi A. Ability of biofilm production and molecular analysis of spa and ica genes among clinical isolates of methicillin-resistant Staphylococcus aureus. BMC Res Notes 2020; 13:19. [PMID: 31910883 PMCID: PMC6947956 DOI: 10.1186/s13104-020-4885-9] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Accepted: 01/02/2020] [Indexed: 12/18/2022] Open
Abstract
Objective This study aimed to evaluate the phenotypic and genotypic characterization of biofilm formation and spa and ica genes among clinical isolates of methicillin-resistant Staphylococcus aureus. Result This cross-sectional study was performed on 146 Staphylococcus aureus isolates from hospitalized patients in Isfahan Province Hospitals. MRSA isolates were confirmed using disk diffusion test with oxacillin disk and amplification of mecA gene by PCR assays. Ability of biofilm production was evaluated targeting the icaA and icaD genes. Of 146 Staphylococcus aureus isolates, 24 (16.4%) carried mecA genes and identified as MRSA strains. Strong ability of biofilm production was seen among 76.02% (111/146) S. aureus isolates and 87.5% (21/24) MRSA strains, respectively. Also, 75.0% (18/24) MRSA isolates carried icaA and icaD was not detected in these strains. Analysis of spa gene showed 70.83% (17/24) MRSA strains were spa positive. From which 14 and 3 strains identified with one band (150, 270, 300, 360, 400 bp) and two bands (150–300 bp), respectively. According to data obtained, the prevalence of MRSA isolates from Isfahan Province Hospitals is relatively high and a remarkable percentage of them show strong power in biofilm production. Also analysis of spa gene showed a fairly large diversity among MRSA strains.
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Affiliation(s)
- Mitra Omidi
- Department of Microbiology and Immunology, School of Medicine, Kashan University of Medical Sciences, Kashan, Iran
| | - Farzaneh Firoozeh
- Department of Microbiology and Immunology, School of Medicine, Kashan University of Medical Sciences, Kashan, Iran. .,Dietary Supplements and Probiotic Research Center, Alborz University of Medical Sciences, Karaj, Iran. .,Department of Microbiology, School of Medicine, Alborz University of Medical Sciences, Karaj, 3149779453, IR, Iran.
| | - Mahmood Saffari
- Department of Microbiology and Immunology, School of Medicine, Kashan University of Medical Sciences, Kashan, Iran
| | - Hossein Sedaghat
- Department of Microbiology and Immunology, School of Medicine, Kashan University of Medical Sciences, Kashan, Iran
| | - Mohammad Zibaei
- Department of Parasitology and Mycology, School of Medicine, Alborz University of Medical Sciences, Karaj, Iran.,Evidence-Based Phytotherapy and Complementary Medicine Research Center, Alborz University of Medical Sciences, Karaj, Iran
| | - Azad Khaledi
- Department of Microbiology and Immunology, School of Medicine, Kashan University of Medical Sciences, Kashan, Iran
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17
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Tång Hallbäck E, Karami N, Adlerberth I, Cardew S, Ohlén M, Engström Jakobsson H, Svensson Stadler L. Methicillin-resistant Staphylococcus argenteus misidentified as methicillin-resistant Staphylococcus aureus emerging in western Sweden. J Med Microbiol 2019; 67:968-971. [PMID: 29771232 DOI: 10.1099/jmm.0.000760] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [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: 12/25/2022] Open
Abstract
Two strains included in a whole-genome sequencing project for methicillin-resistant Staphylococcus aureus (MRSA) were identified as non-Staphylococcus aureus when the sequences were analysed using the bioinformatics software ALEX (www.1928diagnostics.com, Gothenburg, Sweden). Sequencing of the sodA gene of these strains identified them as Staphylococcus argenteus. The collection of MRSA in western Sweden was checked for additional strains of this species. A total of 18 strains of S. argenteus isolated between 2011 and December 2017 were identified.
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Affiliation(s)
- Erika Tång Hallbäck
- Department of Infectious Diseases, Institute of Biomedicine, Sahlgrenska Academy of the University of Gothenburg, Gothenburg, Sweden
| | - Nahid Karami
- Department of Infectious Diseases, Institute of Biomedicine, Sahlgrenska Academy of the University of Gothenburg, Gothenburg, Sweden
| | - Ingegerd Adlerberth
- Department of Infectious Diseases, Institute of Biomedicine, Sahlgrenska Academy of the University of Gothenburg, Gothenburg, Sweden
| | - Sofia Cardew
- Culture collection university of Gothenburg, Department of Infectious Diseases, Institute of Biomedicine, Sahlgrenska Academy of the University of Gothenburg, Gothenburg, Sweden
| | - Maria Ohlén
- Culture collection university of Gothenburg, Department of Infectious Diseases, Institute of Biomedicine, Sahlgrenska Academy of the University of Gothenburg, Gothenburg, Sweden
| | - Hedvig Engström Jakobsson
- Culture collection university of Gothenburg, Department of Infectious Diseases, Institute of Biomedicine, Sahlgrenska Academy of the University of Gothenburg, Gothenburg, Sweden
| | - Liselott Svensson Stadler
- Culture collection university of Gothenburg, Department of Infectious Diseases, Institute of Biomedicine, Sahlgrenska Academy of the University of Gothenburg, Gothenburg, Sweden
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18
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Mun YS, Hwang YJ. Novel spa and Multi-Locus Sequence Types (MLST) of Staphylococcus Aureus Samples Isolated from Clinical Specimens in Korean. Antibiotics (Basel) 2019; 8:antibiotics8040202. [PMID: 31671880 PMCID: PMC6963223 DOI: 10.3390/antibiotics8040202] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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: 09/30/2019] [Revised: 10/21/2019] [Accepted: 10/22/2019] [Indexed: 12/24/2022] Open
Abstract
Staphylococcus aureus bacteremia is one of the most frequent and severe bacterial infections worldwide. The increased incidence of S. aureus infections with a diverse pattern of S. aureus protein A (spa) types across different geographic regions is a global challenge. This study investigated a novel spa type of methicillin-resistant S. aureus in a clinically isolated specimen. A total of 109 clinical S. aureus samples were subjected to 19 sets of antimicrobial susceptibility testing using the Kirby-Bauer disk diffusion method. Molecular typing was performed with S. aureus protein A (spa) and multi-locus sequence types (MLST) via polymerase chain reaction and sequencing. The methicillin-resistant S. aureus samples in our study accounted for 55.05% (60/109) of the total. A novel spa type was detected in five (5/60) strains. This gh22 isolate was identified in antimicrobial susceptibility tests of 15 kinds of antibiotics. Antibiotic resistance genes included mecA, TEM, aac(6')-aph(2"), ermA, and tetM. Eleven S. aureus samples were classified as t2460, t338, t324, t693, five unknown spa types (new spa types), and undefined MLST (novel MLST). We report a high prevalence rate of t2460 methicillin-resistant S. aureus samples in our country. Additionally, novel spa gh22, MLST ST4613, and clonal compact CC5-type strains (T1:M1:B1:B1:M1:E1:K1, r26:r17:r34:r34:r17:r13:r16, mlst;1:4:1:4:559:495:10) showing multidrug resistance were identified among S. aureus samples.
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Affiliation(s)
- Yae Sung Mun
- Department of Life science, College of Bio-nano technology, Gachon University, 191, Hambangmoe-ro, Yeonsu-gu, Incheon 21936, Korea.
| | - You Jin Hwang
- Department of Life science, College of Bio-nano technology, Gachon University, 191, Hambangmoe-ro, Yeonsu-gu, Incheon 21936, Korea.
- Department of Health Sciences and Technology, GAIHST, Gachon University, Incheon 21999, Korea.
- Department of Biomedical Engineering, College of Health Science, Gachon University, 191, Hambangmoe-ro, Yeonsu-gu, Incheon 21936, Korea.
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19
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Ziasistani M, Shakibaie MR, Kalantar-Neyestanaki D. Genetic characterization of two vancomycin-resistant Staphylococcus aureus isolates in Kerman, Iran. Infect Drug Resist 2019. [PMID: 31308707 DOI: 10.2147/idr.s205596]] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Aim The aim of this study was the genetic characterization of two clinical vancomycin-resistant Staphylococcus aureus (VRSA) isolates. Materials and methods Resistance to vancomycin was determined by phenotypic method. PCR was used for detection of mecA, vanA, ermA, ermB, ermC, msrA/B, aph(2")-Ic, aph(3')-IIIa, pvl, Immune Evasion Cluster [sea, sep, chip, sak and scn] genes and biofilm operon icaABCD. On the other hand, multilocus sequence typing and agr typing methods were performed for the determination of clonal relationship and van operon was detected and sequenced. Results Vancomycin-resistant Staphylococcus aureus strain 1 (VRSA-1) was positive for vanA, ermA, ermC, aph(2")-Ic, aph(3')-IIIa, sea, sep, icaD genes, belonging to agr type I; SCCmec type III; spa type t030; and ST239. However, the genetic characterization of Vancomycin-resistant Staphylococcus aureus strain 2 (VRSA-2) revealed the presence of various types of resistance genes vanA, ermA, ermC, aph(2")-Ic, aph(3')-IIIa, sea, icaD, relating to agr type I; SCCmec type III; spa type t459; and ST239. The presence of transposon Tn1546 was determined by PCR sequencing.The Basic Local Alignment Search Tool analysis of van operon in the VRSA isolates showed 99.6% sequence homology to Tn1546 in vancomycin-resistant enterococci, indicating the vanA operon has an enterococcal origin. Conclusion In conclusion, the ST239 is one of the most common clones of MRSA isolates which involved the hospital-associated infections, therefore, the emergence of VRSA isolates with ST239 increased the spread of resistance to vancomycin in the hospital settings.
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Affiliation(s)
- Mahsa Ziasistani
- Student Research Committee, Faculty of Medicine, Kerman University of Medical Sciences, Kerman, Iran.,Pathology and Stem Cell Research Center٫ Faculty of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Mohammad Reza Shakibaie
- Department of Microbiology and Virology, Faculty of Medicine, Kerman University of Medical Sciences, Kerman, Iran.,Research Center for Infectious Diseases and Tropical Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Davood Kalantar-Neyestanaki
- Department of Microbiology and Virology, Faculty of Medicine, Kerman University of Medical Sciences, Kerman, Iran
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20
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Ziasistani M, Shakibaie MR, Kalantar-Neyestanaki D. Genetic characterization of two vancomycin-resistant Staphylococcus aureus isolates in Kerman, Iran. Infect Drug Resist 2019; 12:1869-1875. [PMID: 31308707 PMCID: PMC6619737 DOI: 10.2147/idr.s205596] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [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: 02/16/2019] [Accepted: 05/29/2019] [Indexed: 02/05/2023] Open
Abstract
Aim The aim of this study was the genetic characterization of two clinical vancomycin-resistant Staphylococcus aureus (VRSA) isolates. Materials and methods Resistance to vancomycin was determined by phenotypic method. PCR was used for detection of mecA, vanA, ermA, ermB, ermC, msrA/B, aph(2”)-Ic, aph(3ʹ)-IIIa, pvl, Immune Evasion Cluster [sea, sep, chip, sak and scn] genes and biofilm operon icaABCD. On the other hand, multilocus sequence typing and agr typing methods were performed for the determination of clonal relationship and van operon was detected and sequenced. Results Vancomycin-resistant Staphylococcus aureus strain 1 (VRSA-1) was positive for vanA, ermA, ermC, aph(2”)-Ic, aph(3ʹ)-IIIa, sea, sep, icaD genes, belonging to agr type I; SCCmec type III; spa type t030; and ST239. However, the genetic characterization of Vancomycin-resistant Staphylococcus aureus strain 2 (VRSA-2) revealed the presence of various types of resistance genes vanA, ermA, ermC, aph(2”)-Ic, aph(3ʹ)-IIIa, sea, icaD, relating to agr type I; SCCmec type III; spa type t459; and ST239. The presence of transposon Tn1546 was determined by PCR sequencing.The Basic Local Alignment Search Tool analysis of van operon in the VRSA isolates showed 99.6% sequence homology to Tn1546 in vancomycin-resistant enterococci, indicating the vanA operon has an enterococcal origin. Conclusion In conclusion, the ST239 is one of the most common clones of MRSA isolates which involved the hospital-associated infections, therefore, the emergence of VRSA isolates with ST239 increased the spread of resistance to vancomycin in the hospital settings.
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Affiliation(s)
- Mahsa Ziasistani
- Student Research Committee, Faculty of Medicine, Kerman University of Medical Sciences, Kerman, Iran.,Pathology and Stem Cell Research Center٫ Faculty of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Mohammad Reza Shakibaie
- Department of Microbiology and Virology, Faculty of Medicine, Kerman University of Medical Sciences, Kerman, Iran.,Research Center for Infectious Diseases and Tropical Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Davood Kalantar-Neyestanaki
- Department of Microbiology and Virology, Faculty of Medicine, Kerman University of Medical Sciences, Kerman, Iran
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21
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Hadyeh E, Azmi K, Seir RA, Abdellatief I, Abdeen Z. Molecular Characterization of Methicillin Resistant Staphylococcus aureus in West Bank-Palestine. Front Public Health 2019; 7:130. [PMID: 31192182 PMCID: PMC6549579 DOI: 10.3389/fpubh.2019.00130] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [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: 01/24/2019] [Accepted: 05/08/2019] [Indexed: 11/16/2022] Open
Abstract
Background: Methicillin-resistant Staphylococcus aureus (MRSA) is a public health threat and a major cause of hospital-acquired and community-acquired infections. This study aimed to investigate the genetic diversity of MRSA isolates from 2015 to 2017 and to characterize the major MRSA clones and anti-biogram trends in Palestine. Methodology: Isolates were obtained from 112 patients admitted to different hospitals of West Bank and East Jerusalem, originating from different clinical sources. Antibiotic susceptibility patterns, staphylococcal chromosomal cassette mec (SCCmec) typing, and Staphylococcus aureus protein A (spa) typing were determined. Also, a panel of toxin genes and virulence factors was studied, including: Panton-Valentine Leukocidin (PVL), ACME-arcA, Toxic Shock Syndrome Toxin-1 (TSST-1), and Exfoliative Toxin A (ETA). Results: Of the 112 confirmed MRSA isolates, 100% were resistant to all β-lactam antibiotics. Resistance rates to other non- β-lactam classes were as the following: 18.8% were resistant to trimethoprim-sulfamethoxazole, 23.2% were resistant to gentamicin, 34.8% to clindamycin, 39.3% to ciprofloxacin, and 63.4% to erythromycin. All MRSA isolates were susceptible to vancomycin (100%). Of all isolates, 32 isolates (28.6%) were multidrug- resistant (MDR). The majority of the isolates were identified as SCCmec type IV (86.6%). The molecular typing identified 29 spa types representing 12 MLST-clonal complexes (CC). The most prevalent spa types were: spa type t386 (CC1)/(12.5%), spa type t044 (CC80)/(10.7%), spa type t008 (CC8)/(10.7%), and spa type t223 (CC22)/(9.8%). PVL toxin gene was detected in (29.5%) of all isolates, while ACME-arcA gene was present in 18.8% of all isolates and 23.2% had the TSST-1 gene. The two most common spa types among the TSST-1positive isolates were the spa type t223 (CC22)/(Gaza clone) and the spa type t021 (CC30)/(South West Pacific clone). All isolates with the spa type t991 were ETA positive (5.4%). USA-300 clone (spa type t008, positive for PVL toxin gene and ACME-arcA genes) was found in nine isolates (8.0%). Conclusions: Our results provide insights into the epidemiology of MRSA strains in Palestine. We report a high diversity of MRSA strains among hospitals in Palestine, with frequent SCCmec type IV carriage. The four prominent clones detected were: t386-IV/ CC1, the European clone (t044/CC80), Gaza clone (t223/CC22), and the USA-300 clone (t008/CC8).
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Affiliation(s)
- Etaf Hadyeh
- Al-Quds Public Health Society, Jerusalem, Palestine.,Department of Medical Lab Sciences, Faculty of Health Professions, Jerusalem, Palestine
| | - Kifaya Azmi
- Al-Quds Public Health Society, Jerusalem, Palestine.,Faculty of Medicine, Al-Quds Nutrition and Health Research Institute, Al-Quds University, Jerusalem, Palestine.,Biochemistry and Molecular Biology Department, Faculty of Medicine, Al-Quds University, Jerusalem, Palestine
| | - Rania Abu Seir
- Department of Medical Lab Sciences, Faculty of Health Professions, Jerusalem, Palestine
| | - Inas Abdellatief
- Laboratory Department of Al-Makassed Charitable Hospital, Jerusalem, Palestine
| | - Ziad Abdeen
- Al-Quds Public Health Society, Jerusalem, Palestine.,Faculty of Medicine, Al-Quds Nutrition and Health Research Institute, Al-Quds University, Jerusalem, Palestine
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Nyasinga J, Kyany'a C, Okoth R, Oundo V, Matano D, Wacira S, Sang W, Musembi S, Musila L. A six-member SNP assay on the iPlex MassARRAY platform provides a rapid and affordable alternative for typing major African Staphylococcus aureus types. Access Microbiol 2019; 1:e000018. [PMID: 32974514 PMCID: PMC7471782 DOI: 10.1099/acmi.0.000018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [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: 11/23/2018] [Accepted: 03/03/2019] [Indexed: 11/18/2022] Open
Abstract
Purpose Data on the clonal distribution of Staphylococcus aureus in Africa are scanty, partly due to the high costs and long turnaround times imposed by conventional genotyping methods such as spa and multilocus sequence typing (MLST), which means there is a need for alternative typing approaches. This study evaluated the discriminatory power, cost of and time required for genotyping Kenyan staphylococcal isolates using iPlex MassARRAY compared to conventional methods. Methodology Fifty-four clinical S. aureus isolates from three counties were characterized using iPlex MassARRAY, spa and MLST typing methods. Ten single-nucleotide polymorphisms (SNPs) from the S. aureus MLST loci were assessed by MassARRAY. >Results The MassARRAY assay identified 14 unique SNP genotypes, while spa typing and MLST revealed 22 spa types and 21 sequence types (STs) that displayed unique regional distribution. spa type t355 (ST152) was the dominant type overall while t037/t2029 (ST 241) dominated among the methicillin-resistant S. aureus (MRSA) isolates. MassARRAY showed 83 % and 82 % accuracy against spa typing and MLST, respectively, in isolate classification. Moreover, MassARRAY identified all MRSA strains and a novel spa type. MassARRAY had a reduced turnaround time (<12 h) compared to spa typing (4 days) and MLST (20 days). The MassARRAY reagent and consumable costs per isolate were approximately $18 USD compared to spa typing ($30 USD) and MLST ($126 USD). Conclusion This study demonstrated that iPlex MassARRAY can be adapted as a useful surveillance tool to provide a faster, more affordable and fairly accurate method for genotyping African S. aureus isolates to identify clinically significant genotypes, MRSA strains and emerging strain types.
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Affiliation(s)
- Justin Nyasinga
- Kenyatta University, Nairobi, Kenya.,Technical University of Kenya, Nairobi, Kenya
| | - Cecilia Kyany'a
- United States Army Medical Research Directorate - Africa, Nairobi, Kenya
| | - Raphael Okoth
- United States Army Medical Research Directorate - Africa, Nairobi, Kenya
| | - Valerie Oundo
- United States Army Medical Research Directorate - Africa, Nairobi, Kenya
| | - Daniel Matano
- United States Army Medical Research Directorate - Africa, Nairobi, Kenya
| | - Simon Wacira
- United States Army Medical Research Directorate - Africa, Nairobi, Kenya
| | - Willie Sang
- Kenya Medical Research Institute, Nairobi, Kenya
| | | | - Lillian Musila
- United States Army Medical Research Directorate - Africa, Nairobi, Kenya
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Valeriani F, Margarucci LM, Romano Spica V. Recreational Use of Spa Thermal Waters: Criticisms and Perspectives for Innovative Treatments. Int J Environ Res Public Health 2018; 15:E2675. [PMID: 30487383 PMCID: PMC6313452 DOI: 10.3390/ijerph15122675] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 11/20/2018] [Accepted: 11/23/2018] [Indexed: 01/01/2023]
Abstract
Natural spa springs are diffused all over the world and their use in pools is known since ancient times. This review underlines the cultural and social spa context focusing on hygiene issues, public health guidelines and emerging concerns regarding water management in wellness or recreational settings. The question of the "untouchability" of therapeutic natural waters and their incompatibility with traditional disinfection processes is addressed considering the demand for effective treatments that would respect the natural properties. Available strategies and innovative treatments are reviewed, highlighting potentials and limits for a sustainable management. Alternative approaches comprise nanotechnologies, photocatalysis systems, advanced filtration. State of the art and promising perspectives are reported considering the chemical-physical component and the biological natural complexity of the spa water microbiota.
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Affiliation(s)
- Federica Valeriani
- Public Health Unit, University of Rome "Foro Italico", Rome 00135, Italy.
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24
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Zhu Q, Wen W, Wang W, Sun B. Transcriptional regulation of virulence factors Spa and ClfB by the SpoVG-Rot cascade in Staphylococcus aureus. Int J Med Microbiol 2018; 309:39-53. [PMID: 30392856 DOI: 10.1016/j.ijmm.2018.10.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [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: 04/27/2018] [Revised: 09/25/2018] [Accepted: 10/18/2018] [Indexed: 12/15/2022] Open
Abstract
Staphylococcus aureus can produce numerous surface proteins involved in the adhesion and internalization of host cells, immune evasion, and inflammation initiation. Among these surface proteins, the microbial surface components recognizing adhesive matrix molecules contain many crucial cell wall-anchored virulence factors. The Sar-family regulatory protein Rot has been reported to regulate many important extracellular virulence factors at the transcriptional level, including Spa and clumping factor B. SpoVG, a global regulator in S. aureus, is known to control the expression of numerous genes. Here, we demonstrate that SpoVG can positively regulate the transcription of rot by directly binding to its promoter. SpoVG can also positively regulate the transcription of spa and clfB through direct-binding to their promoters and in a Rot-mediated manner. Furthermore, SpoVG can positively modulate the human fibrinogen-binding ability of S. aureus. In addition, phosphorylation of SpoVG by the serine/threonine kinase, Stk1, can positively regulate its binding to the promoters of rot, spa, and clfB. The human cell infection assay showed that the adhesion and internalization abilities were reduced in the spoVG mutant strain in comparison to those in the wild-type strain. Collectively, our data reveal a SpoVG-Rot regulatory cascade and novel molecular mechanisms in the virulence control in S. aureus.
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Affiliation(s)
- Qing Zhu
- Division of Molecular Medicine, Hefei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences, University of Science and Technology of China, China
| | - Wen Wen
- Division of Molecular Medicine, Hefei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences, University of Science and Technology of China, China
| | - Wanying Wang
- Division of Molecular Medicine, Hefei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences, University of Science and Technology of China, China
| | - Baolin Sun
- Division of Molecular Medicine, Hefei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences, University of Science and Technology of China, China.
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25
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Hesari MR, Salehzadeh A, Darsanaki RK. Prevalence and molecular typing of methicillin-resistant Staphylococcus aureus carrying Panton-Valentine leukocidin gene. Acta Microbiol Immunol Hung 2018; 65:93-106. [PMID: 28859499 DOI: 10.1556/030.64.2017.032] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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: 11/19/2022]
Abstract
Panton-Valentine leukocidin (pvl) toxin is an important virulence factor of Staphylococcus aureus. The main genes are coa and spa for distinguishing and typing of S. aureus isolates. The aim of this study was to investigate antibiotic resistance, presence of mecA and pvl genes, as well as epidemiological typing of these isolates according to polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method in clinical sample isolated from Rasht city, Iran. A total of 250 clinical samples have been isolated from different hospitals. First, isolates of S. aureus were identified through microbiological methods and their antibiotic sensitivity was determined by disk diffusion agar based on a standard method of Clinical and Laboratory Standards Institute. DNA was extracted by boiling and presence of pvl and mecA genes was investigated by PCR using specific primers. To type these isolates, amplification of fragments of coa and spa genes was done and restriction enzyme digestion pattern was determined by PCR-RFLP method. Among the 250 samples, 50 isolates belonged to S. aureus and results of antibiotic sensitivity showed that 68% (34 samples) of isolates were methicillin resistant. Frequency of mecA and pvl genes among S. aureus isolates were 60% (30 samples) and 20% (10 samples). The PCR of coa gene showed three patterns whereas that of spa gene showed two patterns for enzyme digestion. Result of PCR-RFLP using HaeIII enzymes for coa gene and Bsp1431 for spa gene showed three patterns for enzyme digestion. Recent studies indicated increase in the resistance of S. aureus to different antibiotics, which is a serious problem in the treatment of infections resulting from S. aureus in this region. The result of PCR of pvl showed high frequency of this gene in this region, and coa and spa typing by PCR-RFLP was a useful tool for typing of S. aureus isolates.
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Affiliation(s)
| | - Ali Salehzadeh
- 1 Department of Biology, Rasht Branch, Islamic Azad University, Rasht, Iran
| | - Reza Kazemi Darsanaki
- 2 Young Researchers and Elites Club, Lahijan Branch, Islamic Azad University, Lahijan, Iran
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26
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Argudín MA, Deplano A, Vandendriessche S, Dodémont M, Nonhoff C, Denis O, Roisin S. CC398 Staphylococcus aureus subpopulations in Belgian patients. Eur J Clin Microbiol Infect Dis 2018; 37:911-916. [PMID: 29450768 DOI: 10.1007/s10096-018-3205-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [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: 11/30/2017] [Accepted: 01/29/2018] [Indexed: 10/18/2022]
Abstract
Studies based on genome-wide single nucleotide polymorphisms (SNPs) supported the existence of two subpopulations in clonal complex (CC) 398 Staphylococcus aureus: an ancestral human-adapted clade (HC) and an animal-associated clade (AC). In this study, we have investigated the occurrence of genetic markers that allow discrimination of these subpopulations among CC398 isolates collected during 2014 to 2016 from human patients in Belgium. A collection of isolates was investigated by means of spa-typing and 16S-mecA-nuc PCR. CC398 isolates were classified as belonging to the human or the animal clade by using a canonical SNPs PCR and further studied by antimicrobial susceptibility and the presence of toxins, immune evasion cluster (IEC), and resistance genes. A total of 124 (7.8%) human isolates belonged to CC398. They were grouped into HC (n = 58) or AC (n = 66). The genes erm(T), pvl, chp, and scn were predominantly found in HC-CC398, while AC-CC398 isolates carried more frequently than the mecA, erm(C), tet(K), tet(M), and tet(L) genes. Different combinations of gene profiles were observed according to the clade. CC398 isolates from Belgian patients belonged to different subpopulations including typical HC and AC-isolates. Few HC-strains with mecA and AC-isolates harboring IEC were found. CC398 isolates from Belgian patients belonged to different subpopulations including typical HC and AC-isolates, as well as new emerging subpopulations that underline the ability of this lineage to acquire resistance and virulence genes. Further research is needed to evaluate the emergence of these subpopulations in the clinical setting.
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Affiliation(s)
- M Angeles Argudín
- National Reference Centre-Staphylococcus aureus, Department of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Route de Lennik 808, 1070, Brussels, Belgium.
| | - A Deplano
- National Reference Centre-Staphylococcus aureus, Department of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Route de Lennik 808, 1070, Brussels, Belgium
| | - S Vandendriessche
- Department of Laboratory Medicine, Ghent University Hospital, Ghent, Belgium
| | - M Dodémont
- National Reference Centre-Staphylococcus aureus, Department of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Route de Lennik 808, 1070, Brussels, Belgium
| | - C Nonhoff
- National Reference Centre-Staphylococcus aureus, Department of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Route de Lennik 808, 1070, Brussels, Belgium
| | - O Denis
- National Reference Centre-Staphylococcus aureus, Department of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Route de Lennik 808, 1070, Brussels, Belgium.,Ecole de Santé Publique, Université Libre de Bruxelles, Bruxelles, Belgium
| | - S Roisin
- National Reference Centre-Staphylococcus aureus, Department of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Route de Lennik 808, 1070, Brussels, Belgium
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Abstract
Compounds that inhibit virulence gene expression in bacterial pathogens have received increasing interest as possible alternatives to the traditional antibiotic treatment of infections. For the human pathogen Staphylococcus aureus, we have developed two simple assays based on reporter gene fusions to central virulence genes that are easily applicable for screening various sources of natural and synthetic peptides for anti-virulence effects. The plate assay is qualitative but simultaneously assesses the effect of gradient concentrations of the investigated compound, whereas the liquid assay is quantitative and can be employed to address whether a compound is acting on the central quorum sensing regulatory system, agr, that controls a large number of virulence genes in S. aureus.
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Affiliation(s)
- Martin Saxtorph Bojer
- Department of Veterinary Disease Biology, Faculty of Health and Medical Sciences, University of Copenhagen, Stigbøjlen 4, FrederiksbergC, 1870, Denmark
| | - Mara Baldry
- Department of Veterinary Disease Biology, Faculty of Health and Medical Sciences, University of Copenhagen, Stigbøjlen 4, FrederiksbergC, 1870, Denmark
| | - Hanne Ingmer
- Department of Veterinary Disease Biology, Faculty of Health and Medical Sciences, University of Copenhagen, Stigbøjlen 4, FrederiksbergC, 1870, Denmark.
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28
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Ho CM, Lin CY, Ho MW, Lin HC, Chen CJ, Lin LC, Lu JJ. Methicillin-resistant Staphylococcus aureus isolates with SCCmec type V and spa types t437 or t1081 associated to discordant susceptibility results between oxacillin and cefoxitin, Central Taiwan. Diagn Microbiol Infect Dis 2016; 86:405-411. [PMID: 27650515 DOI: 10.1016/j.diagmicrobio.2016.08.025] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [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: 05/16/2016] [Revised: 08/03/2016] [Accepted: 08/24/2016] [Indexed: 01/21/2023]
Abstract
Staphylococcus aureus isolates with discordant susceptibility results between oxacillin and cefoxitin obtained using automated microbiology systems are infrequently observed. From April 2013 to December 2014, 1956 methicillin-resistant S. aureus (MRSA) and 1761 methicillin-susceptible S. aureus isolates were obtained from different patients. Forty isolates (1.1% and 2% in case of S. aureus and MRSA, respectively) with discordant susceptibility results (oxacillin susceptible and cefoxitin resistant) and carrying mecA gene were obtained. Except 2 SCCmec type IV isolates, 38 MRSA isolates were all SCCmec type V (VT or non-VT), which were further divided into VT (n=22) and non-VT (n=16). The most common spa type in VT and non-VT isolates were t437 (n=19) and t1081 (n=13), respectively. Only 55% of patients received effective antimicrobial agents; 2 mortalities were not attributable to MRSA infection. Using standard agar dilution, 17 MRSA isolates (0.46% and 0.87% in case of S. aureus and MRSA, respectively) had oxacillin MIC in the susceptible ranges (oxacillin-susceptible MRSA [OS-MRSA]); all carried SCCmec type V (VT, n=8; non-VT, n=9). The most common spa-MLST types of OS-MRSA in VT and non-VT were t437-ST59 (n=4) and t1081-ST45 (n=7), respectively. Concomitant testing by both cefoxitin- and oxacillin-based methods is a practical strategy for OS-MRSA detection in the clinical laboratories. Continuous monitoring of OS-MRSA isolates is necessary to elucidate their impact in clinical infectious diseases.
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Affiliation(s)
- Cheng-Mao Ho
- Department of Laboratory Medicine, China Medical University Hospital, Taichung, Taiwan; Department of Internal Medicine, China Medical University Hospital, Taichung, Taiwan; Department of Nursing, Hungkuang University, Taichung, Taiwan; Graduate Institute of Clinical Medical Science, China Medical University, Taichung, Taiwan
| | - Chien-Yu Lin
- Department of Laboratory Medicine, China Medical University Hospital, Taichung, Taiwan; Graduate Institute of Clinical Medical Science, China Medical University, Taichung, Taiwan
| | - Mao-Wang Ho
- Department of Internal Medicine, China Medical University Hospital, Taichung, Taiwan
| | - Hsiao-Chuan Lin
- Department of Infectious Diseases, Children's Hospital, China Medical University Hospital, China Medical University, Taichung, Taiwan
| | - Chao-Jung Chen
- Graduate Institute of Integrated Medicine, China Medical University, Taichung, Taiwan
| | - Lee-Chung Lin
- Department of Laboratory Medicine, Chang-Gung Memorial Hospital, Linkou, Taoyuan, Taiwan; Department of Medical Biotechnology and Laboratory Science, Chang Gung University, Kweu-Shan, Taoyuan, Taiwan
| | - Jang-Jih Lu
- Graduate Institute of Clinical Medical Science, China Medical University, Taichung, Taiwan; Department of Laboratory Medicine, Chang-Gung Memorial Hospital, Linkou, Taoyuan, Taiwan; Department of Medical Biotechnology and Laboratory Science, Chang Gung University, Kweu-Shan, Taoyuan, Taiwan.
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29
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Gungen GO, Ardic F, Findikoglu G, Rota S. Effect of mud compress therapy on cartilage destruction detected by CTX-II in patients with knee osteoarthritis. J Back Musculoskelet Rehabil 2016; 29:429-38. [PMID: 26406208 DOI: 10.3233/bmr-150629] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
BACKGROUND/OBJECTIVE The aim of this study is to investigate the effect of mud compress (MC) therapy compared to hot pack (HP) therapy on cartilage destruction and subchondral bone alterations detected by urine levels of C telopeptide fragment of collagen type-II (uCTX-II) in patients with knee osteoarthritis (OA). METHODS Fifty-nine patients between 49-74 years of age with bilateral knee OA divided into 2 groups. Twenty-five patients (16 females, 9 males) and 34 patients (22 females, 13 males) were given HP versus local natural organic and mineral-rich MC therapy respectively for 2 weeks as a total of 12 sessions. uCTX-II, Visual Analog Scale (VAS), 15 m walking time, Western Ontario and McMaster Universities multifunctional (WOMAC) index were measured at baseline, after-treatment and 3 months after treatment. RESULTS uCTX-II level did not show any difference between the two groups, however it decreased significantly in MC and HP groups 3 months after treatment (p< 0.017). WOMAC stiffness sore was significantly lower in MC group 3 months after treatment (p< 0.05). Both MC and HP therapies lowered VAS, WOMAC total and subscores significantly up to 3 months (p< 0.017). CONCLUSIONS HP and MC therapies for OA of knee are not superior to one another with respect to the level of uCTX-II. MC may probably decrease the ongoing cartilage destruction and related subchonral bone interactions earlier compared to HP treatment in patients with knee OA as evidenced by decreased uCTX-II levels after-treatment.
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Affiliation(s)
- Gonca Odemis Gungen
- Denizli Governmental Hospital, Clinic of Physical Medicine and Rehabilitation, Denizli, Turkey
| | - Fusun Ardic
- Department of Physical Medicine and Rehabilitation, Faculty of Medicine, University of Pamukkale, Denizli, Turkey
| | - Gulin Findikoglu
- Department of Biochemistry, Faculty of Medicine, University of Pamukkale, Denizli, Turkey
| | - Simin Rota
- Department of Biochemistry, Faculty of Medicine, University of Pamukkale, Denizli, Turkey
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30
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Abdalrahman LS, Stanley A, Wells H, Fakhr MK. Isolation, Virulence, and Antimicrobial Resistance of Methicillin-Resistant Staphylococcus aureus (MRSA) and Methicillin Sensitive Staphylococcus aureus (MSSA) Strains from Oklahoma Retail Poultry Meats. Int J Environ Res Public Health 2015; 12:6148-61. [PMID: 26035662 DOI: 10.3390/ijerph120606148] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Accepted: 05/22/2015] [Indexed: 01/12/2023]
Abstract
Staphylococcus aureus is one the top five pathogens causing domestically acquired foodborne illness in the U.S. Only a few studies are available related to the prevalence of S. aureus and MRSA in the U.S. retail poultry industry. The objectives of this study were to determine the prevalence of S. aureus (MSSA and MRSA) in retail chicken and turkey meats sold in Tulsa, Oklahoma and to characterize the recovered strains for their antimicrobial resistance and possession of toxin genes. A total of 167 (114 chicken and 53 turkey) retail poultry samples were used in this study. The chicken samples included 61 organic samples while the rest of the poultry samples were conventional. The overall prevalence of S. aureus was 57/106 (53.8%) in the conventional poultry samples and 25/61 (41%) in the organic ones. Prevalence in the turkey samples (64.2%) was higher than in the chicken ones (42.1%). Prevalence of S. aureus did not vary much between conventional (43.4%) and organic chicken samples (41%). Two chicken samples 2/114 (1.8%) were positive for MRSA. PFGE identified the two MRSA isolates as belonging to PFGE type USA300 (from conventional chicken) and USA 500 (from organic chicken) which are community acquired CA-MRSA suggesting a human based source of contamination. MLST and spa typing also supported this conclusion. A total of 168 Staphylococcus aureus isolates (101 chicken isolates and 67 turkey isolates) were screened for their antimicrobial susceptibility against 16 antimicrobials and their possession of 18 different toxin genes. Multidrug resistance was higher in the turkey isolates compared to the chicken ones and the percentage of resistance to most of the antimicrobials tested was also higher among the turkey isolates. The hemolysin hla and hld genes, enterotoxins seg and sei, and leucocidins lukE-lukD were more prevalent in the chicken isolates. The PVL gene lukS-lukF was detected only in chicken isolates including the MRSA ones. In conclusion, S. aureus is highly prevalent in poultry retail meats sold in Oklahoma with a very low presence of human-originated MRSA. Multidrug resistance is not only prevalent in the MRSA isolates, but also in many MSSA poultry strains, particularly turkey.
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Cuny C, Layer F, Werner G, Harmsen D, Daniels-Haardt I, Jurke A, Mellmann A, Witte W, Köck R. State-wide surveillance of antibiotic resistance patterns and spa types of methicillin-resistant Staphylococcus aureus from blood cultures in North Rhine-Westphalia, 2011-2013. Clin Microbiol Infect 2015; 21:750-7. [PMID: 25704447 DOI: 10.1016/j.cmi.2015.02.013] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [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: 10/30/2014] [Revised: 01/09/2015] [Accepted: 02/12/2015] [Indexed: 11/25/2022]
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) is a major cause of bacteraemia. We aimed to obtain a complete picture of severe MRSA infections by characterizing all MRSA isolates from bloodstream infections in the largest German federal state (North Rhine-Westphalia, 18 million inhabitants) using S. aureus protein A (spa) sequence-typing and antimicrobial susceptibility testing. MRSA isolates (n = 1952) were collected prospectively (2011-2013) and spa-typed. Among 181 different spa types, t003 (n = 746 isolates; 38.2%) and t032 (n = 594; 30.4%) were predominant. Analysis of the geographical occurrence of spa clonal complexes (spa-CCs) and spa types revealed divergent distribution between federal state districts for spa-CCs 003 (p < 0.001; including t003, p < 0.001 and t264, p < 0.001), 008 (p 0.021), 011 (p 0.002), 032 (p < 0.001; including t022, p 0.014 and t032, p < 0.001) and spa type t2807 (p < 0.001). MICs of antimicrobial substances were tested using broth microdilution. Of all isolates, 96% were resistant to fluoroquinolones, 78% to erythromycin, 70% to clindamycin, 4% to gentamicin, 2% to rifampicin, 0.4% to daptomycin, 0.1% to linezolid and 0% to vancomycin, respectively. Vancomycin MICs of 2 mg/L involved 0.5% of the isolates. In conclusion, the detection of regional molecular clusters added valuable information for epidemiological case tracing and allowed conclusions to be reached on the importance of newly emerging MRSA reservoirs, such as livestock (spa-CC011), for MRSA bacteraemia in some parts of the federal state. Susceptibility testing revealed broad resistance to substances used for oral treatment, but demonstrated that those antibiotics that are mostly applied for treatment of MRSA bacteraemia and important combination partners were highly susceptible.
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Affiliation(s)
- C Cuny
- Robert Koch-Institute, National Reference Laboratory for Staphylococci and Enterococci, Wernigerode, Germany
| | - F Layer
- Robert Koch-Institute, National Reference Laboratory for Staphylococci and Enterococci, Wernigerode, Germany
| | - G Werner
- Robert Koch-Institute, National Reference Laboratory for Staphylococci and Enterococci, Wernigerode, Germany
| | - D Harmsen
- Department of Periodontology, University Hospital Münster, Münster, Germany
| | | | - A Jurke
- Centre for Health North Rhine-Westphalia, Münster, Germany
| | - A Mellmann
- Institute of Hygiene, University Hospital Münster, Münster, Germany
| | - W Witte
- Robert Koch-Institute, National Reference Laboratory for Staphylococci and Enterococci, Wernigerode, Germany
| | - R Köck
- Institute of Hygiene, University Hospital Münster, Münster, Germany; Institute of Medical Microbiology, University Hospital Münster, Münster, Germany.
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Deiters C, Günnewig V, Friedrich AW, Mellmann A, Köck R. Are cases of Methicillin-resistant Staphylococcus aureus clonal complex (CC) 398 among humans still livestock-associated? Int J Med Microbiol 2014; 305:110-3. [PMID: 25434977 DOI: 10.1016/j.ijmm.2014.11.007] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [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: 09/19/2014] [Revised: 11/06/2014] [Accepted: 11/09/2014] [Indexed: 10/24/2022] Open
Abstract
UNLABELLED Methicillin-resistant Staphylococcus aureus (MRSA) of clonal complex (CC) 398 are widespread among pigs, cattle and poultry as well as among humans who have contact to these livestock animals. However, there is limited data on livestock-independent dissemination of MRSA CC398 in the general population. METHODS In this case-control study MRSA isolates derived (between July 2013 and June 2014) from patients of four hospitals located in a livestock-dense region were S. aureus protein A (spa) typed and risk factors for MRSA acquisition were assessed from patients colonized or infected with MRSA CC398 vs. other MRSA molecular types (MRSA non-CC398). RESULTS Of 384 patients, 21% were colonized with MRSA CC398. Contact with livestock (Odds Ratio (OR) 46.03) and residence directly on a pig farm (OR 12.82) were associated with MRSA CC398. Of 55 patients with MRSA CC398, 21 (38%) did not report direct livestock contact. Among the latter we identified several risk factors that could have facilitated indirect transmission, such as living on farms (without being farmer), private contact with known MRSA carriers or previous hospitalization. DISCUSSION This study suggests that MRSA CC398 is still mostly disseminated via direct contact to livestock. However, a substantial proportion of patients seem to acquire MRSA CC398 via other pathways.
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Affiliation(s)
- Christian Deiters
- Institute of Hygiene, University Hospital Münster, Robert-Koch-Str. 41, 48149 Münster, Germany; Christophorus-Kliniken GmbH, Hagenstraße 35, 48301 Nottuln, Germany
| | - Volker Günnewig
- Christophorus-Kliniken GmbH, Hagenstraße 35, 48301 Nottuln, Germany
| | - Alexander W Friedrich
- Department of Medical Microbiology, University Medical Centre Groningen, University of Groningen, Hanzeplain 1, 9700 RB Groningen, The Netherlands
| | - Alexander Mellmann
- Institute of Hygiene, University Hospital Münster, Robert-Koch-Str. 41, 48149 Münster, Germany
| | - Robin Köck
- Institute of Hygiene, University Hospital Münster, Robert-Koch-Str. 41, 48149 Münster, Germany.
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Ho CM, Lin CY, Ho MW, Lin HC, Peng CT, Lu JJ. Concomitant genotyping revealed diverse spreading between methicillin-resistant Staphylococcus aureus and methicillin-susceptible Staphylococcus aureus in central Taiwan. J Microbiol Immunol Infect 2014; 49:363-70. [PMID: 25305708 DOI: 10.1016/j.jmii.2014.07.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Revised: 06/17/2014] [Accepted: 07/04/2014] [Indexed: 12/13/2022]
Abstract
BACKGROUND Staphylococcus aureus is a versatile bacterium, which can lead to various infectious diseases. Various molecular typing methods are applied to the evolution and epidemiology surveys of S. aureus, mostly for methicillin-resistant S. aureus (MRSA). However, methicillin-susceptible S. aureus (MSSA) is still an important pathogen, but their molecular typing is evaluated infrequently. METHODS Pulsed-field gel electrophoresis (PFGE), spa typing, and detection of five virulent genes for 95 MRSA and 56 MSSA isolates (July-December 2008 and July 2008-December 2009, respectively) during an overlapping period were performed. RESULTS More diversity was found in MSSA isolates (23 pulsotypes and 25 spa types, excluding 4 new-type and 1 nontypable isolates for spa typing) than in MRSA isolates (19 pulsotypes and 16 spa types, excluding 1 new-type and 1 nontypable isolates for spa typing). By spa typing, t002 (n = 30), t037 (n = 23), t437 (n = 21), t234 (n = 3), t1081 (n = 3), and t1094 (n = 3) were the six major MRSA clones. For MSSA isolates, t189 (n = 13), t437 (n = 4), t084 (n = 3), t213 (n = 3), t701 (n = 3), and t7200 (n = 3) were the six major types. Combining PFGE and spa typing, there were five combinations (pulsotype + spa type) that contained both MRSA and MSSA isolates (pulsotype 9-t437, pulsotype 15-t037, pulsotype 19-t002, pulsotype 21-t002, and pulsotype 28-t1081). For all 151 S. aureus or 95 MRSA isolates, the PFGE typing had more discrimination power, but spa typing had larger discrimination index for 56 MSSA isolates. CONCLUSION In conclusion, there were different predominant MRSA and MSSA clones clinically. Continuing longitudinal tracking of molecular typing is necessary for elucidating the evolution of this important clinical pathogen.
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Affiliation(s)
- Cheng-Mao Ho
- Department of Laboratory Medicine, China Medical University Hospital, Taichung, Taiwan; Internal Medicine, China Medical University Hospital, Taichung, Taiwan; Department of Nursing, Hungkuang University, Taichung, Taiwan; School of Medicine, China Medical University, Taichung, Taiwan
| | - Chien-Yu Lin
- Department of Laboratory Medicine, China Medical University Hospital, Taichung, Taiwan; Graduate Institute of Clinical Medical Science, China Medical University, Taichung, Taiwan
| | - Mao-Wang Ho
- Internal Medicine, China Medical University Hospital, Taichung, Taiwan
| | - Hsiao-Chuan Lin
- Department of Pediatrics, Children's Hospital, China Medical University, Taichung, Taiwan; School of Medicine, China Medical University, Taichung, Taiwan
| | - Ching-Tien Peng
- Department of Pediatrics, Children's Hospital, China Medical University, Taichung, Taiwan; Department of Biotechnology, Asia University, Taichung, Taiwan
| | - Jang-Jih Lu
- Graduate Institute of Clinical Medical Science, China Medical University, Taichung, Taiwan; Department of Laboratory Medicine, Chang-Gung Memorial Hospital, Linkou, Taoyuan, Taiwan; Department of Medical Biotechnology and Laboratory Science, Chang Gung University, Kweishan, Taoyuan, Taiwan.
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Wang SH, Stevenson KB, Hines L, Mediavilla JR, Khan Y, Soni R, Dutch W, Brandt E, Bannerman T, Kreiswirth BN, Pancholi P; Prevention Epicenter Program of the Centers for Disease Control and Prevention. Evaluation of repetitive element polymerase chain reaction for surveillance of methicillin-resistant Staphylococcus aureus at a large academic medical center and community hospitals. Diagn Microbiol Infect Dis 2015; 81:13-7. [PMID: 25439582 DOI: 10.1016/j.diagmicrobio.2014.05.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Revised: 05/06/2014] [Accepted: 05/10/2014] [Indexed: 11/24/2022]
Abstract
Repetitive element polymerase chain reaction (rep-PCR) typing has been used for methicillin-resistant Staphylococcus aureus (MRSA) strain characterization. The goal of this study was to determine if a rapid commercial rep-PCR system, DiversiLab™ (DL; bioMérieux, Durham, NC, USA), could be used for MRSA surveillance at a large medical center and community hospitals. A total of 1286 MRSA isolates genotyped by the DL system were distributed into 84 distinct rep-PCR patterns: 737/1286 (57%) were clustered into 6 major rep-PCR patterns. A subset of 220 isolates was further typed by pulsed-field gel electrophoresis (PFGE), spa typing, and SCCmec typing. The 220 isolates were distributed into 80 rep-PCR patterns, 94 PFGE pulsotypes, 27 spa, and 3 SCCmec types. The DL rep-PCR system is sufficient for surveillance, but the DL system alone cannot be used to compare data to other institutions until a standardized nomenclature is established and the DL MRSA reference library is expanded.
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Lim KT, Teh CSJ, Yusof MYM, Thong KL. Mutations in rpoB and fusA cause resistance to rifampicin and fusidic acid in methicillin-resistant Staphylococcus aureus strains from a tertiary hospital in Malaysia. Trans R Soc Trop Med Hyg 2013; 108:112-8. [PMID: 24336696 DOI: 10.1093/trstmh/trt111] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [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: 11/14/2022] Open
Abstract
BACKGROUND The prevalence of resistance to rifampicin and fusidic acid among Malaysian strains of methicillin-resistant Staphylococcus aureus (MRSA) is increasing. This study aimed to determine the mechanisms of rifampicin and fusidic acid resistance and the genetic diversity of MRSA strains from a Malaysian tertiary hospital. METHODS Minimum inhibitory concentrations (MIC) for 21 MRSA strains were determined by agar dilution test and Etest. The resistance genes, staphylococcal chromosome cassette mec (SCCmec) types, multilocus-sequence typing (MLST) types and spa types, were determined by PCR and DNA sequencing. RESULTS MIC for rifampicin and fusidic acid resistance ranged from <1 to 8 µg/ml and from <1 to 256 µg/ml, respectively. A double mutation (484Arg/His and 517Glu/Gln) in rpoB causes high rifampicin resistance while a mutational change (461Leu/Lys) in fusA was observed in seven strains highly resistant to fusidic acid. Five of the seven were also resistant to rifampicin (MIC 8 µg/ml) and carried a mutated rpoB gene (484Arg/His). No other acquired fusidic acid resistance gene (fusB, fusC or fusD) was detected. Most (14/21) of the strains belonged to clone ST239-III-t037. Three belonged to ST22-IV-t1378 and the remaining four to ST239-III-t2029, ST239-III-t421, ST1178-IV-t1107 and ST241-III-t363, respectively. CONCLUSIONS The study showed that both rifampicin and fusidic acid resistance was associated with mutational change in rpoB and fusA, respectively. All rifampicin-resistant strains were from the same clone ST239-III-t037 whereas strains resistant to fusidic acid were genetically more diverse.
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Affiliation(s)
- King-Ting Lim
- Institute of Biological Science, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
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Sun DD, Ma XX, Hu J, Tian Y, Pang L, Shang H, Cui LZ. Epidemiological and molecular characterization of community and hospital acquired Staphylococcus aureus strains prevailing in Shenyang, Northeastern China. Braz J Infect Dis 2013; 17:682-90. [PMID: 23916451 PMCID: PMC9427354 DOI: 10.1016/j.bjid.2013.02.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2012] [Revised: 02/11/2013] [Accepted: 02/15/2013] [Indexed: 11/17/2022] Open
Abstract
In order to obtain adequate information for the treatment of methicillin resistant Staphylococcus aureus (MRSA) infections, it is crucial to identify trends in epidemiological and antimicrobial resistance patterns of local S. aureus strains. Community and hospital acquired S. aureus isolates (n = 202) were characterized using staphylococcal cassette chromosome mec (SCCmec) typing, pulse field gel electrophoresis (PFGE) analysis, spa typing and minimal inhibitory concentration (MIC) determination. The prevalence of the Panton-Valentine leukocidine (pvl) and several antibiotic resistance genes among the isolates were also detected by PCR. All of the S. aureus isolates were susceptible to vancomycin, daptomycin and linezolid. Three hospital isolates were resistant to teicoplanin while 14 showed intermediate resistance to teicoplanin. The resistance patterns of community-acquired MRSA (CA-MRSA) isolates to other antimicrobials were similar to those of hospital-acquired MRSA (HA-MRSA) isolates except for clindamycin and gentamicin. There was excellent correlation between phenotypes and genotypes in the determination of S. aureus resistance to erythromycin, gentamicin, and tetracycline. The SCCmec type II and SCCmec type IV were the predominant types detected in hospital and community isolates, respectively. The most frequently encountered spa types were t002 and t030 both in HA- and CA-MRSA isolates. Pulsotype A was the most predominant pulsotype identified among the isolates tested, followed by pulsotype B. Seventy-two hospital isolates (19 HA-MRSA and 53 HA-MSSA) and 10 CA-MRSA were positive for the pvl gene. This study shows that the combination of susceptibility testing and various molecular methods has provided useful information on the antibiotic resistance and molecular diversity of S. aureus in a specific region of China. The high proportion of pvl positive MSSA and MRSA isolates observed in this study indicates that adequate measures are needed to curtail the spread of those MRSA and MSSA clones prevailing both in hospital and the community.
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Affiliation(s)
- Dan Dan Sun
- Department of Medical Microbiology and Parasitology, College of Basic Medical Sciences, China Medical University, Shenyang, People's Republic of China
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LaCava J, Chandramouli N, Jiang H, Rout MP. Improved native isolation of endogenous Protein A-tagged protein complexes. Biotechniques 2013; 54:213-6. [PMID: 23581468 PMCID: PMC3667664 DOI: 10.2144/000114012] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2012] [Accepted: 02/28/2013] [Indexed: 11/23/2022] Open
Abstract
Here we report a modified peptide reagent useful for the rapid, native elution of protein complexes containing a Protein-A-tagged component. We tested this reagent for the elution of tagged endogenous protein complexes from yeast (Nup53p/Nup170p dimer; Nup1p/Kap95p/Kap60p trimer; pentameric GINS complex) and bacteria (RNAP holoenzyme). The majority of the affinity-isolated material is released within 15 minutes under mild conditions, and the elution reagent itself is readily depleted from the elution mixture by simple spin column gel filtration. This reagent is ideal for eluting protein complexes after Protein A / IgG affinity isolation when protease cleavage is not possible or not desirable and facile depletion of the elution reagent is needed.
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Affiliation(s)
- John LaCava
- Laboratory of Cellular and Structural Biology, The Rockefeller University, New York, NY, USA
| | | | - Hua Jiang
- Laboratory of Cellular and Structural Biology, The Rockefeller University, New York, NY, USA
| | - Michael P. Rout
- Laboratory of Cellular and Structural Biology, The Rockefeller University, New York, NY, USA
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Rocca G, Dioni F, Rocca N, Oliveri F, Brunetto MR, Bonino F. Thermal care of functional dyspepsia based on bicarbonate-sulphate-calcium water: a sequential clinical trial. Evid Based Complement Alternat Med 2011; 4:381-91. [PMID: 17965771 PMCID: PMC1978226 DOI: 10.1093/ecam/nel100] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/26/2006] [Accepted: 10/30/2006] [Indexed: 02/07/2023]
Abstract
Drug treatment of functional dyspepsia is often unsatisfactory. We assessed the efficacy of a bicarbonate-sulphate-calcium thermal water cycle of 12 days, in patients with functional dyspepsia. Patients with functional dyspepsia were sent by their general practitioners to 12 days of treatment with thermal water, 200–400 ml in the morning, at temperature of 33°C (91.4 F) and were evaluated on a strict intention to treat basis. Four efficacy endpoints were analyzed as follows: (i) reduction of the global symptoms score, (ii) reduction of intensity to a level not interfering with everyday activities, (iii) specific efficacy on ulcer-like or dysmotility-like dyspepsia and (iv) esophageal or abdominal-associated symptoms. Statistical significance was reached for all three primary outcomes after the first 29 consecutive patients. Thermal water reduced the global symptom score, reduced intensity of symptoms to a level not interfering with everyday activity, but was unable to completely suppress all symptoms. A parallel effect emerged for ulcer-like and dyspepsia-like subgroups. The effect on heartburn and abdominal symptoms was not significant, suggesting a specific effect of the water on the gastric and duodenal wall. The Roma II criteria identify a natural kind of dyspepsia that improves with thermal water. Ulcer-like and dysmotility-like are not therapeutically distinguishable subgroups. Patients with dominant esophageal or abdominal symptoms should receive a different therapy. Sequential methods are very effective for the evaluation of traditional care practices and should be considered preliminary and integrative to randomized controlled trials in this context.
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Affiliation(s)
- Giuseppe Rocca
- Direzione Scientifica of Fondazione Ospedale Maggiore Policlinico Mangiagalli e Regina Elena Milan, Italy.
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Toledo AA, Mitchell-Leef D, Elsner CW, Slayden SM, Roudebush WE. Fertilization potential of human sperm is correlated with endogenous platelet-activating factor content. J Assist Reprod Genet 2003; 20:192-5. [PMID: 12812462 PMCID: PMC3455302 DOI: 10.1023/a:1023622126870] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [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] [Indexed: 11/12/2022] Open
Abstract
PURPOSE Platelet-activating factor (PAF) is a potent signaling phospholipid that is found in mammalian sperm and has a positive correlation with fertility. Whereas PAF is present in human sperm, there are no relational reports on its content and the cells fertilization potential. Therefore, the study objective was to determine if PAF content in capacitated-induced sperm is related to fertilization potential as determined by the sperm penetration assay (SPA). METHODS Endogenous sperm lipids were measured for PAF content by a specific radioimmunoassay following insemination of zona pellucida-free hamster ova. Data were analyzed by regression analysis and Student's t test. RESULTS Regression analysis revealed a positive and significant relation (R2 = 0.806; P < 0.05) between PAF content in human sperm and SPA outcome (pass: > or = 5.0; fail: < 5.0, penetrations/ova). Patients that passed (22.61 +/- 5.21 picomoles/10(6)) the SPA had significantly (P < 0.01) higher PAF levels in their sperm than patients that failed (12.91 +/- 1.76 picomoles/10(6) cells) the test. CONCLUSIONS PAF content in capacitated-induced sperm has a significant and positive relationship with fertilization potential. Fertilization potential may be predicted by measuring PAF levels in capacitation-induced human sperm. Determining PAF content in capacitated human sperm may be a beneficial diagnostic tool for the infertility specialist.
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Abstract
The role of the interleukin-6 (IL-6) group of cytokines in differentiation of two lung adenocarcinoma cell lines has been examined using induction of alkaline phosphatase and expression of surfactant protein A. Oncostatin M was the most active and potent for alkaline phosphatase in A549 cells, with IL-6 having similar activity but less potency. Neither cytokine induced alkaline phosphatase in NCI-H441 cells, although induction was obtained with lung fibroblast-conditioned medium. Surfactant protein A was induced in NCI-H441 cells by conditioned medium and dexamethasone and, to a much lesser extent, by oncostatin M or IL-6. Induction of alkaline phosphatase and surfactant protein A were both dexamethasone-dependent, though some induction of surfactant protein A was obtained with interferon-alpha in the absence of dexamethasone. The activity present in lung fibroblast-conditioned medium suggests paracrine control, but this appears not to be due to oncostatin M or IL-6 as disabling antibodies to either cytokine were not inhibitory, and, although alkaline phosphatase was induced in A549 by both cytokines, it was only induced by conditioned medium in NCI-H441 cells. Furthermore, surfactant protein A was induced in H441 by conditioned medium to a much greater extent than by oncostatin M or IL-6. These data demonstrate that cytokines of the IL-6 group have potential as differentiation inducers in lung adenocarcinoma cells and that there is an equivalent paracrine factor(s) in lung fibroblast conditioned medium. As the production of this factor by fibroblasts is not enhanced by glucocorticoid, although the response of the target cell is, it would appear to be distinct from the fibrocyte pneumocyte factor previously described by Post et al 1984.
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Affiliation(s)
- C McCormick
- CRC Department of Medical Oncology, University of Glasgow, UK
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