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Al-Iede M, Ayyad DM, Etoom RA, Aldameiry RH, Toubasi AA. The prevalence and risk factors of methicillin-resistant Staphylococcus aureus among pediatric populations: a systematic review and meta-analysis. Eur J Pediatr 2024:10.1007/s00431-024-05672-7. [PMID: 38970703 DOI: 10.1007/s00431-024-05672-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Revised: 06/22/2024] [Accepted: 06/26/2024] [Indexed: 07/08/2024]
Abstract
There is scarcity in the data about MRSA prevalence and risk factors among the pediatric population. This research explores the global prevalence and risk factors of MRSA among the pediatric population. PubMed, Scopus, Web of Sciences, and the Cochrane Central Register of Controlled Trials were systematically searched. Our primary goal was to assess the prevalence of MRSA colonization and its related risk factors in the general pediatric population. A total of 124 studies encompassing 44 million participants were included in this meta-analysis, and the overall pooled estimated global prevalence of MRSA colonization in pediatric was 5% [95% CI 4-5%]. Female sex (OR = 4.17; 95% CI, 3.31-5.27), recent surgery (OR = 3.79; 95% CI, 2.20-6.52), recent hospitalization (OR = 2.63; 95% CI, 1.78-3.86), and antibiotic use (OR = 2.42; 95% CI, 1.58-3.72) were significantly associated with higher odds of MRSA colonization. CONCLUSION Future research should build on these findings by emphasizing ongoing efforts to combat MRSA in pediatric settings and implementing targeted interventions. WHAT IS KNOWN • Methicillin-resistant Staphylococcus aureus (MRSA) is considered a threat to public health. It is noteworthy to mention that the prevalence of MRSA strains has not been adequately quantified in many countries, especially in the pediatric population. The pediatric population is a pivotal source of MRSA and may play a central role in its distribution in both community and healthcare settings. A notable study underscores the gravity of the situation, estimating a tenfold increase in the incidence of MRSA infection among children in the USA between 1999 and 2008. WHAT IS NEW • Here we present the first global systematic review and meta-analysis to investigate the prevalence and risk factors of MRSA among the pediatric population. A total of 124 studies encompassing 44 million participants were included in this analysis. The overall pooled estimated global prevalence of MRSA colonization in the pediatric population was 5% [95% CI 4-5%]. The prevalence was the highest in Asia and lowest in Europe. Female sex, recent surgery, recent hospitalization, and antibiotic use were significantly associated with higher odds of MRSA colonization.
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Affiliation(s)
- Montaha Al-Iede
- School of Medicine, The University of Jordan, Queen Rania Street, Amman, 11942, Jordan.
- Department of Pediatrics, Jordan University Hospital, Amman, Jordan.
- Department of Pediatrics, School of Medicine, The University of Jordan, Amman, Jordan.
| | - Dania M Ayyad
- School of Medicine, The University of Jordan, Queen Rania Street, Amman, 11942, Jordan
| | - Rasha A Etoom
- School of Medicine, The University of Jordan, Queen Rania Street, Amman, 11942, Jordan
| | - Rawaby H Aldameiry
- School of Medicine, The University of Jordan, Queen Rania Street, Amman, 11942, Jordan
| | - Ahmad A Toubasi
- School of Medicine, The University of Jordan, Queen Rania Street, Amman, 11942, Jordan
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Yang L, Dharmaratne P, Zhu C, Sapugahawatte DN, Rahman N, Barua N, Li C, Kwok KO, Luo M, Liyanapathirana V, Ip M. Global epidemiology of asymptomatic colonisation of methicillin-resistant Staphylococcus aureus in the upper respiratory tract of young children: a systematic review and meta-analysis. Arch Dis Child 2024; 109:267-274. [PMID: 38296611 PMCID: PMC10958260 DOI: 10.1136/archdischild-2023-326124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Accepted: 01/07/2024] [Indexed: 03/21/2024]
Abstract
OBJECTIVE To estimate the global prevalence of asymptomatic colonisation, and determine the associated risk factors, antibiotic resistance and genotypes of methicillin-resistant Staphylococcus aureus (MRSA) in the upper respiratory tract of young children. DESIGN Four bibliometric databases were searched for publications between 2010 and 2022 according to the protocol registered in PROSPERO. Cross-sectional or cohort studies describing the prevalence of asymptomatic colonisation of S. aureus and MRSA in young children were included. Data extraction and analysis were carried out by two reviewers independently according to Preferred Reporting Items for Systematic Reviews and Meta-Analyses 2020 statement. Pooled prevalence was estimated using a random effects model. SETTING AND STUDIES We included studies where children without respiratory tract infection or Staphylococcal infection were recruited from the community, children's institutions (ie, nurseries, kindergartens, daycare centres and preschools) and healthcare centre visits and assessed for asymptomatic colonisation with S. aureus and MRSA. MAIN OUTCOME MEASURES The pooled prevalence of asymptomatic colonisation of S. aureus and MRSA of young children globally. RESULTS In this systematic review and meta-analysis of 21 416 young children, the pooled global prevalence of asymptomatic S. aureus colonisation was 25.1% (95% CI 21.4 to 28.8) and MRSA colonisation was 3.4% (95% CI 2.8 to 4.1). The clones of MRSA strains included healthcare-associated MRSA, community-associated MRSA and livestock-associated MRSA. CONCLUSION This study provides evidence of increased MRSA colonisation globally among young children, underlining the critical role of asymptomatic carriers in MRSA transmission and the need for control measures. PROSPERO REGISTRATION NUMBER CRD 42022328385.
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Affiliation(s)
- Liuyue Yang
- Department of Microbiology, The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Priyanga Dharmaratne
- Department of Microbiology, The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Chendi Zhu
- Department of Microbiology, The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | | | - Nannur Rahman
- Department of Microbiology, The Chinese University of Hong Kong, Hong Kong, Hong Kong
- Department of Food Technology and Nutritional Science, Mawlana Bhashani Science and Technology University, Tangail, Bangladesh
| | - Nilakshi Barua
- Department of Microbiology, The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Carmen Li
- Department of Microbiology, The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Kin On Kwok
- JC School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong, Hong Kong
- Stanley Ho Centre for Emerging Infectious Diseases, The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Mingjing Luo
- Center for Synthetic Microbiome, Shenzhen Institute of Synthetic Biology, CAS, Shenzhen, China
| | | | - Margaret Ip
- Department of Microbiology, The Chinese University of Hong Kong, Hong Kong, Hong Kong
- Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, China
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Isolation and Analysis of the Biological Characteristics of a Novel Bacteriophage vB_SauP_P992 Against Staphylococcus aureus. Jundishapur J Microbiol 2022. [DOI: 10.5812/jjm-121670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Background: Staphylococcus aureus is one of the most virulent pathogens inducing various diseases in humans and animals. Disturbingly, the degree and rate of drug resistance in this pathogen have sharply increased and have become a global concern. Objectives: This study analyzed the lytic activity and the biological characteristics of a mitomycin C-induced bacteriophage from S. aureus isolated and identified from hospital sewage to explore novel antibacterial therapeutic strategies for the clinical treatment of drug-resistant S. aureus, including urinary tract infections caused by MRSA strains. Methods: The new bacteriophage vB_SauP_P992, which can effectively lyse the MRSA strain, was successfully isolated and purified using the double agar plate method. In this regard, pH sensitivity, one-step growth curve, the optimal multiplicity of infection (MOI), thermo-sensitivity, phage host range, and the effects of organic reagents on phage activity were determined. Results: Electron microscopic results showed that the bacteriophage head was hexagonal with a non-contractile tail and could form a single, neatly-bordered plaque. Moreover, the optimal MOI was 0.1. The one-step growth curve showed a bacteriophage incubation period of about 20 min, a lysis period of 90 min, and a burst size of about 65.8 PFU per infected cell. The bacteriophage vB_SauP_P992 had acceptable thermal stability, pH stability, and resistance to physical and chemical factors, indicating a bacteriophage with no capsule. Conclusions: With an intense lytic activity and acceptable stability, this novel bacteriophage lays a solid foundation to enrich the bacteriophage library and better prevent and control drug-resistant S. aureus infections.
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Chan YQ, Chen K, Chua GT, Wu P, Tung KTS, Tsang HW, Lung D, Ip P, Chui CSL. Risk factors for carriage of antimicrobial-resistant bacteria in community dwelling-children in the Asia-Pacific region: a systematic review and meta-analysis. JAC Antimicrob Resist 2022; 4:dlac036. [PMID: 35449720 PMCID: PMC9018396 DOI: 10.1093/jacamr/dlac036] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Accepted: 03/13/2022] [Indexed: 11/12/2022] Open
Abstract
Background Antimicrobial resistance is an increasingly important issue in public health as antibiotics are overused. Resistance to antimicrobial agents can pose significant challenges to infection treatment. Objectives To evaluate risk factors associated with carriage of antimicrobial-resistant (AMR) bacteria in children in the Asia-Pacific region to consolidate evidence for future implementation of antibiotic prescribing practice. Methods Three electronic databases-PubMed, EMBASE and Cochrane Library-were searched. Observational studies that investigated the risk factors for carriage of MRSA, penicillin-resistant Streptococcus pneumoniae, ESBL-producing Escherichia coli and Klebsiella pneumoniae among the paediatric population in community settings in the Asia-Pacific region were considered eligible. Summary statistics from the identified studies were pooled using meta-analyses. Results From the 4145 search results, 25 papers were included in this review. Sixteen papers were included in the meta-analysis based on reported risk factors. Young age of 2-6 months compared with children aged 7-60 months (OR 2.74, 95% CI: 1.75-4.29), antibiotic use within the past 3 months (OR 2.65, 95% CI: 1.70-4.12), daycare attendance (OR 1.49, 95% CI: 1.17-1.91) and hospital admission within the past 3 months (OR 3.43, 95% CI: 2.13-5.51) were found to be significant risk factors for AMR bacterial carriage, whilst breastfeeding (OR 0.69, 95% CI: 0.60-0.81) and concurrent colonization of S. pneumoniae (OR 0.59, 95% CI: 0.38-0.91) are protective factors. Conclusions The findings support that there are a number of significant risk factors associated with carriage of AMR bacteria in the Asia-Pacific paediatric population. To combat antimicrobial resistance in the future, these risk factors should be considered, and measures taken to mitigate associated carriage.
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Affiliation(s)
- Yi Qi Chan
- Centre for Safe Medication Practice and Research, Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Kailin Chen
- Centre for Safe Medication Practice and Research, Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
- Laboratory of Data Discovery for Health (D4H), Hong Kong Science and Technology Park, Sha Tin, Hong Kong, China
| | - Gilbert T. Chua
- Department of Paediatrics and Adolescent Medicine, School of Clinical Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Peng Wu
- Laboratory of Data Discovery for Health (D4H), Hong Kong Science and Technology Park, Sha Tin, Hong Kong, China
- School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Keith T. S. Tung
- Department of Paediatrics and Adolescent Medicine, School of Clinical Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Hing Wai Tsang
- Department of Paediatrics and Adolescent Medicine, School of Clinical Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - David Lung
- Department of Pathology, Hong Kong Children’s Hospital, Hong Kong, China
| | - Patrick Ip
- Department of Paediatrics and Adolescent Medicine, School of Clinical Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Celine S. L. Chui
- Laboratory of Data Discovery for Health (D4H), Hong Kong Science and Technology Park, Sha Tin, Hong Kong, China
- School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
- School of Nursing, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
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Abdullahi IN, Lozano C, Ruiz-Ripa L, Fernández-Fernández R, Zarazaga M, Torres C. Ecology and Genetic Lineages of Nasal Staphylococcus aureus and MRSA Carriage in Healthy Persons with or without Animal-Related Occupational Risks of Colonization: A Review of Global Reports. Pathogens 2021; 10:1000. [PMID: 34451464 PMCID: PMC8400700 DOI: 10.3390/pathogens10081000] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2021] [Revised: 07/30/2021] [Accepted: 08/02/2021] [Indexed: 01/16/2023] Open
Abstract
In this conceptual review, we thoroughly searched for appropriate English articles on nasal staphylococci carriage among healthy people with no reported risk of colonization (Group A), food handlers (Group B), veterinarians (Group C), and livestock farmers (Group D) published between 2000 and 2021. Random-effects analyses of proportions were performed to determine the pooled prevalence of S. aureus, MRSA, MRSA-CC398, and MSSA-CC398, as well as the prevalence of PVL-positive S. aureus from all eligible studies. A total of 166 eligible papers were evaluated for Groups A/B/C/D (n = 58/31/26/51). The pooled prevalence of S. aureus and MRSA in healthy humans of Groups A to D were 15.9, 7.8, 34.9, and 27.1%, and 0.8, 0.9, 8.6, and 13.5%, respectively. The pooled prevalence of MRSA-CC398 nasal carriage among healthy humans was as follows: Group A/B (<0.05%), Group C (1.4%), Group D (5.4%); and the following among Group D: pig farmers (8.4%) and dairy farmers (4.7%). The pooled prevalence of CC398 lineage among the MSSA and MRSA isolates from studies of the four groups were Group A (2.9 and 6.9%), B (1.5 and 0.0%), C (47.6% in MRSA), and D (11.5 and 58.8%). Moreover, MSSA-CC398 isolates of Groups A and B were mostly of spa-t571 (animal-independent clade), while those of Groups C and D were spa-t011 and t034. The MRSA-CC398 was predominately of t011 and t034 in all the groups (with few other spa-types, livestock-associated clades). The pooled prevalence of MSSA and MRSA isolates carrying the PVL encoding genes were 11.5 and 9.6% (ranges: 0.0-76.9 and 0.0-28.6%), respectively. Moreover, one PVL-positive MSSA-t011-CC398 isolate was detected in Group A. Contact with livestock and veterinary practice seems to increase the risk of carrying MRSA-CC398, but not in food handlers. Thus, this emphasizes the need for integrated molecular epidemiology of zoonotic staphylococci.
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Affiliation(s)
| | | | | | | | | | - Carmen Torres
- Area of Biochemistry and Molecular Biology, University of La Rioja, Madre de Dios 53, 26006 Logroño, Spain; (I.N.A.); (C.L.); (L.R.-R.); (R.F.-F.); (M.Z.)
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Sarrafzadeh F, Sohrevardi SM, Abousaidi H, Mirzaei H. Prevalence of methicillin-resistant Staphylococcus aureus in Iranian children: a systematic review and meta-analysis. Clin Exp Pediatr 2021; 64:415-421. [PMID: 33227182 PMCID: PMC8342872 DOI: 10.3345/cep.2020.00255] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Accepted: 10/22/2020] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND Antibiotic resistance is associated with longer hospitalizations, higher treatment costs, and increased morbidity and mortality rates. PURPOSE This study aimed to determine the prevalence of methicillin-resistant Staphylococcus aureus (MRSA) in Iranian children. METHODS International databases, including Web of Science, PubMed, Embase, and Scopus, and Iranian databases, including Scientific Information Database (www.sid.ir), Magiran, and Iranian Database for Medical Literature (idml.research.ac.ir), were systematically searched for articles published between January 2000 and August 2019. Sources of heterogeneity were determined using subgroup analysis and meta-regression. RESULTS Overall, 343 studies were identified; of them, 20 were included in the meta-analysis to estimate the pooled prevalence. The pooled prevalence of MRSA was 42% (95% confidence interval [CI], 29-55) among culture-positive cases of S. aureus, 51% (95% CI, 39-62) in hospitalized children, and 14% (95% CI, 0.05-27) in healthy children. CONCLUSION The overall pooled prevalence of MRSA in children was 42%. Appropriate infection control measures and effective antibiotic therapy are needed.
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Affiliation(s)
- Farhad Sarrafzadeh
- Faculty of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Seyed Mojtaba Sohrevardi
- Pharmaceutical Science Research Center, Faculty of pharmacy, Shahid Sadoughi University of Medical Science, Yazd, Iran
| | - Hamid Abousaidi
- Faculty of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Hossein Mirzaei
- HIV/STI Surveillance Research Center, WHO Collaborating Center for HIV Surveillance, Institute for Futures Studies in Health, Kerman University of Medical Sciences, Kerman, Iran
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7
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Nascimento PAD, Kogawa AC, Salgado HRN. Cephalothin: Review of Characteristics, Properties and Status of Analytical Methods. J AOAC Int 2020; 104:1593-1608. [PMID: 33252646 DOI: 10.1093/jaoacint/qsaa163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 11/10/2020] [Accepted: 11/11/2020] [Indexed: 11/12/2022]
Abstract
BACKGROUND Cephalothin (CET), a first generation cephalosporin, is the most efficient cephalosporin against resistant microorganisms. Many studies found in literature and pharmacopeias proposes analytical methods and, as most commonly, HPLC and microbiological assays. OBJECTIVE This paper shows a brief review of analytical method to quantify CET with a green analytical chemistry approach. METHODS The research data were collected from the literature and official compendia. RESULTS Most of the analytical methods to determine CET were performed by HPLC and agar diffusion in pharmaceuticals, blood, urine or water. Other analytical methods were found, as UV, Vis, iodometry, fluorimetry, IR/Raman, electrochemical among others, but, in less quantity. One important aspect is that these methods use organic and toxic solvents like methanol and acetonitrile, and only about 4% of the methods found uses water as solvent. CONCLUSIONS In this way, researches about analytical methods focused on green analytical chemistry for CET are of great importance and very relevant to optimize its analysis in pharmaceutical industries and to guarantee the quality of the product. More than just the development of new techniques it is possible to enhance of the ones that already exists applying the green analytical chemistry principles. In this way, it will be possible to reduce the environment impacts caused by these analytical procedures. HIGHLIGHTS This work shows a brief review of literature and pharmacopeias of analytical methods to quantify CET. Its quality control can be updated to meet the needs of current analytical chemistry and to fit into sustainable and eco-friendly analyzes.
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Affiliation(s)
- Patrícia Aleixa do Nascimento
- Department of Pharmaceutics, School of Pharmaceutical Sciences of Araraquara, Univ Estadual Paulista - UNESP, Araraquara, São Paulo, Brazil
| | - Ana Carolina Kogawa
- Universidade Federal de Goiás - UFG, Faculdade de Farmácia, Goiânia, Goiás, Brazil
| | - Hérida Regina Nunes Salgado
- Department of Pharmaceutics, School of Pharmaceutical Sciences of Araraquara, Univ Estadual Paulista - UNESP, Araraquara, São Paulo, Brazil
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Tuta KE, Okesola AO, Umeokonkwo CD. The Prevalence and Risk Factors Associated with Nasal Methicillin-Resistant Staphylococcus Aureus Colonization among Children in a Tertiary Hospital in Nigeria. Ethiop J Health Sci 2020; 29:487-494. [PMID: 31447522 PMCID: PMC6689698 DOI: 10.4314/ejhs.v29i4.10] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Background Nasal methicillin-resistant Staphylococcus aureus (MRSA) colonization is of public health concern due to increased risk of developing invasive infections and the therapeutic challenges. This concern is more among the vulnerable group. We determined the prevalence and associated risk factors of MRSA nasal carriage among children in a tertiary hospital in Nigeria. Method We conducted a hospital-based, cross-sectional study among 300 children attending the outpatient clinic of a tertiary hospital recruited through systematic sampling technique. An interviewer-administered, structured questionnaire was used to obtain sociodemographic characteristics and exposure factors. Nasal swabs samples were collected and inoculated on mannitol salt agar and subcultured on nutrient agar to isolate Staphylococcus aureus. We used the conventional Polymerase Chain Reaction (PCR) technique to detect the presence of mecA gene for MRSA. We calculated the prevalence, prevalence odds ratio to determine risk factors for MRSA acquisition at 5% level of significance. Results The median age was 1.7 years (6 months-16 years). Males accounted for 60.7%, and 75% of the participants were under 5 years. Staphylococcus aureus colonization was found in 36.3% of the participants while 5.3% of the participants had MRSA identified by detecting the mecA gene. History of recent surgery in the last six months was the only independent predictor of nasal MRSA colonization among the participants (aOR=12.5; 95%CI: 2.7–50.0.) Conclusion The high prevalence of MRSA colonization observed among the children in this study suggests the need to consider screening children with history of previous surgery as infection control and prevention intervention for MRSA.
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Affiliation(s)
- Kemi Elizabeth Tuta
- University College Hospital, Ibadan, Oyo State, Nigeria.,Nigeria field Epidemiology laboratory Training Programme, Abuja, Nigeria
| | | | - Chukwuma David Umeokonkwo
- Nigeria field Epidemiology laboratory Training Programme, Abuja, Nigeria.,Department of Community Medicine, Federal Teaching Hospital Abakaliki, Ebonyi State, Nigeria
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Wu M, Tong X, Liu S, Wang D, Wang L, Fan H. Prevalence of methicillin-resistant Staphylococcus aureus in healthy Chinese population: A system review and meta-analysis. PLoS One 2019; 14:e0223599. [PMID: 31647842 PMCID: PMC6812772 DOI: 10.1371/journal.pone.0223599] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Accepted: 09/24/2019] [Indexed: 02/05/2023] Open
Abstract
Objective To comprehensively determine the prevalence of MRSA in healthy Chinese population, the influencing factors of MRSA colonization and its antibiotic resistance. Methods Articles that studied prevalence or influencing factors of MRSA carriage in healthy Chinese population were retrieved from PubMed, Ovid database, three Chinese electronic databases. The pooled prevalence of MRSA, its antibiotic resistance and influencing factors were analyzed by STATA12.0. Results 37 studies were included. The pooled prevalence of MRSA was 21.2% (95% CI: 18.5%-23.9%), and the prevalence of S.aureus was 15% (95% CI: 10%-19%), with a significant heterogeneity (MRSA: I2 = 97.6%, P<0.001; S.aureus: I2 = 98.4%, P < 0.001). In subgroup analysis, the pooled prevalence of MRSA was 28% (95%CI: 10%-51%) for Livestock-related workers, 18% (95%CI: 11%-26%) for children, 20% (95%CI: 12%-29%) for healthcare workers, 7% (95%CI: 3%-13%) for community residents. The prevalence of MRSA in studies with oxacillin disk diffusion method (28%, 95%CI: 21%-35%) seemed higher than that with the mecA gene method(12%, 95%CI: 7%-19%). MRSA in studies conducted in Taiwan was more common than in Mainland China and Hong Kong. Similar results were found in meta-regression. Influencing factors for MRSA colonization were noted in seven eligible studies, they included younger age (OR: 3.54, 95% CI: 2.38–5.26; OR: 2.24, 95% CI: 1.73–2.9), attending day care centers (DCCs) (OR: 1.95, 95% CI: 1.4–2.72; OR: 1.53, 95% CI: 1.2–1.95), flu vaccination (OR:1.73, 95% CI: 1.28–2.35), using antibiotics within the past year (OR: 2.05, 95% CI:1.35–3.11), residing in northern Taiwan (OR: 1.45, 95% CI: 1.19–1.77), regular visits to health care facility (OR: 23.83, 95% CI: 2.72–209.01), household member working in health care facility (OR: 8.98, 95% CI:1.4–55.63), and contact with livestock (OR: 6.31, 95% CI: 3.44–11.57). Moreover, MRSA was found to be highly resistant to penicillin, ampicillin, erythromycin, and clindamycin, with a pooled resistance ratio of 100, 93, 88, and 75%, respectively. However, no resistance were noted to vancomycin. Conclusion The pooled prevalence of MRSA was considerably high in health Chinese population. Additionally, these strains showed extreme resistance to penicillin, ampicillin, erythromycin and clindamycin. Public MRSA protection measures and the surveillance of MRSA should be strengthened to reduce the spread of MRSA among hospitals, communities, and livestock.
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Affiliation(s)
- Man Wu
- Department of Respiratory and Critical Care Medicine, West China Hospital/West China School of Medicine, Sichuan University, Chengdu, China
| | - Xiang Tong
- Department of Respiratory and Critical Care Medicine, West China Hospital/West China School of Medicine, Sichuan University, Chengdu, China
| | - Sitong Liu
- Department of Respiratory and Critical Care Medicine, West China Hospital/West China School of Medicine, Sichuan University, Chengdu, China
| | - Dongguang Wang
- Department of Respiratory and Critical Care Medicine, West China Hospital/West China School of Medicine, Sichuan University, Chengdu, China
| | - Lei Wang
- Department of Respiratory and Critical Care Medicine, West China Hospital/West China School of Medicine, Sichuan University, Chengdu, China
| | - Hong Fan
- Department of Respiratory and Critical Care Medicine, West China Hospital/West China School of Medicine, Sichuan University, Chengdu, China
- * E-mail:
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10
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Lin J, Peng Y, Bai C, Zhang T, Zheng H, Wang X, Ye J, Ye X, Li Y, Yao Z. Prevalence, Influencing Factors, Antibiotic Resistance, Toxin and Molecular Characteristics of Staphylococcus aureus and MRSA Nasal Carriage among Diabetic Population in the United States, 2001-2004. Pol J Microbiol 2019; 66:439-448. [PMID: 29319509 DOI: 10.5604/01.3001.0010.7038] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Diabetic population were reported more likely to suffer carriage and infection with Staphylococcus aureus (S. aureus) and methicillin-resistant Staphylococcus aureus (MRSA) than non-diabetic population. We aim to elucidate the prevalence and characteristics of S. aureus and MRSA nasal carriage among diabetic population in the United States National Health and Nutrition Examination Survey, 2001-2004. Univariate analyses were conducted using Chi-square test, Fisher's exact probability test or student t test, as appropriate. Multivariate analy¬sis using logistic regression was conducted to assess the association between influencing factors and S. aureus and MRSA nasal carriage. 1010 diabetic participants were included in the study. The prevalence of S. aureus and MRSA nasal carriage were 28.32% and 1.09%, respec¬tively. After the logistic regression, ever had a painful sensation or tingling in hands or feet past three months (Odds Ratio [OR] = 0.359, 95% Confidence Interval [CI], 0.146-0.882) was significant among S. aureus nasal carriage and gender (OR = 3.410, 95% CI, 1.091-10.653) was significant among MRSA nasal carriage. The proportions of staphylococcal enterotoxin (SE) A, SEB, SEC, SED, Toxic-shock syn¬drome toxin-1, and Panton Valentine Leukocidin toxin among S. aureus strains were 18.75%, 3.13%, 12.50%, 15.63%, 28.13%, and 9.38%, respectively. 63.63% of MRSA strains were community-acquired, 27.27% were hospital-acquired, and 9.09% were non-typeable. Diabetic patients might be more likely to carry S. aureus and MRSA in the United States. Improving hand hygiene compliance, reducing antibiotic overuse, screening for carriers, and decolonization are recommended to reduce the spread of S. aureus and MRSA, especially in community.
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Affiliation(s)
- Jialing Lin
- Department of Epidemiology and Health Statistics, Guangdong Pharmaceutical University, Guangzhou City, China
| | - Yang Peng
- Centre for Chronic Diseases, University of Queensland, Brisbane City, Australia
| | - Chan Bai
- Department of Epidemiology and Health Statistics, Guangdong Pharmaceutical University, Guangzhou City, China
| | - Ting Zhang
- Department of Epidemiology and Health Statistics, Guangdong Pharmaceutical University, Guangzhou City, China
| | - Haoqu Zheng
- Department of Epidemiology and Health Statistics, Guangdong Pharmaceutical University, Guangzhou City, China
| | - Xiaojie Wang
- Department of Epidemiology and Health Statistics, Guangdong Pharmaceutical University, Guangzhou City, China
| | - Jiaping Ye
- Department of Epidemiology and Health Statistics, Guangdong Pharmaceutical University, Guangzhou City, China
| | - Xiaohua Ye
- Department of Epidemiology and Health Statistics, Guangdong Pharmaceutical University, Guangzhou City, China
| | - Ying Li
- Division of Environmental Health, Public Health Laboratory Center, Guangdong Pharmaceutical University, Guangzhou City, China
| | - Zhenjiang Yao
- Department of Epidemiology and Health Statistics, Guangdong Pharmaceutical University, Guangzhou City, China
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11
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Abdulgader SM, Robberts L, Ramjith J, Nduru PM, Dube F, Gardner-Lubbe S, Zar HJ, Nicol MP. Longitudinal Population Dynamics of Staphylococcus aureus in the Nasopharynx During the First Year of Life. Front Genet 2019; 10:198. [PMID: 30930937 PMCID: PMC6428701 DOI: 10.3389/fgene.2019.00198] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Accepted: 02/25/2019] [Indexed: 11/22/2022] Open
Abstract
Background:Staphylococcus aureus colonization is a risk factor for invasive disease. Few studies have used strain genotype data to study S. aureus acquisition and carriage patterns. We investigated S. aureus nasopharyngeal carriage in infants in an intensively sampled South African birth cohort. Methods: Nasopharyngeal swabs were collected at birth and fortnightly from 137 infants through their first year of life. S. aureus was characterized by spa-typing. The incidence of S. aureus acquisition, and median carriage duration for each genotype was determined. S. aureus carriage patterns were defined by combining the carrier index (proportion of samples testing positive for S. aureus) with genotype diversity measures. Persistent or prolonged carriage were defined by a carrier index ≥0.8 or ≥0.5, respectively. Risk factors for time to acquisition of S. aureus were determined. Results: Eighty eight percent (121/137) of infants acquired S. aureus at least once. The incidence of acquisition at the species and genotype level was 1.83 and 2.8 episodes per child-year, respectively. No children had persistent carriage (defined as carrier index of >0.8). At the species level 6% had prolonged carriage, while only 2% had prolonged carriage with the same genotype. Carrier index correlated with the absolute number of spa-CCs carried by each infant (r = 0.5; 95% CI 0.35–0.62). Time to first acquisition of S. aureus was shorter in children from households with ≥5 individuals (HR 1.06, 95% CI 1.07–1.43), with S. aureus carrier mothers (HR; 1.5, 95% CI 1.2–2.47), or with a positive tuberculin skin test during the first year of life (HR; 1.81, 95% CI 0.97–3.3). Conclusion: Using measures of genotype diversity, we showed that S. aureus NP carriage is highly dynamic in infants. Prolonged carriage with a single strain occurred rarely; persistent carriage was not observed. A correlation was observed between carrier index and genotype diversity.
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Affiliation(s)
- Shima M Abdulgader
- Division of Medical Microbiology, Department of Pathology, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - Lourens Robberts
- Division of Medical Microbiology, Department of Pathology, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - Jordache Ramjith
- Division of Epidemiology and Biostatistics, School of Public Health and Family Medicine, University of Cape Town, Cape Town, South Africa
| | - Polite M Nduru
- Department of Paediatrics and Child Health, Red Cross War Memorial Children's Hospital and SA-MRC Unit on Child and Adolescent Health, University of Cape Town, Cape Town, South Africa
| | - Felix Dube
- Division of Medical Microbiology, Department of Pathology, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa.,Department of Molecular and Cell Biology, Faculty of Science, University of Cape Town, Cape Town, South Africa
| | - Sugnet Gardner-Lubbe
- Department of Statistics and Actuarial Science, Stellenbosch University, Stellenbosch, South Africa
| | - Heather J Zar
- Department of Paediatrics and Child Health, Red Cross War Memorial Children's Hospital and SA-MRC Unit on Child and Adolescent Health, University of Cape Town, Cape Town, South Africa
| | - Mark P Nicol
- Division of Medical Microbiology, Department of Pathology, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa.,Institute of Infectious Disease & Molecular Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa.,School of Biomedical Sciences, University of Western Australia, Perth, WA, Australia
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12
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Cessation from Smoking Improves Innate Host Defense and Clearance of Experimentally Inoculated Nasal Staphylococcus aureus. Infect Immun 2018; 86:IAI.00912-17. [PMID: 29311241 DOI: 10.1128/iai.00912-17] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Accepted: 01/02/2018] [Indexed: 12/17/2022] Open
Abstract
Staphylococcus aureus nasal carriage is transient in most humans and usually benign, but dissemination of S. aureus to extranasal sites causes the majority of clinical infections, and S. aureus is a major cause of serious infections in the United States. A better understanding of innate nasal decolonization mechanisms is urgently needed, as are relevant models for studying S. aureus clearance. Here, we screened a population of healthy smokers for nasal S. aureus carriage and compared the participants' abilities to clear experimentally applied nasal S. aureus before and after completion of a smoking cessation program. We determined that cigarette smoking increases the mean nasal S. aureus load (2.6 × 104 CFU/swab) compared to the load observed in healthy nonsmokers (1.7 × 103 CFU/swab) and might increase the rate of S. aureus nasal carriage in otherwise-healthy adults: 22 of 99 smokers carried S. aureus at the screening visit, while only 4 of 30 nonsmokers screened positive during the same time period. Only 6 of 19 experimental inoculation studies in active smokers resulted in S. aureus clearance within the month of follow-up, while in the cessation group, 6 of 9 subjects cleared nasal S. aureus and carriage duration averaged 21 ± 4 days. Smoking cessation associated with enhanced expression of S. aureus-associated interleukin-1β (IL-1β) and granulocyte colony-stimulating factor (G-CSF) in nasal fluids. Participants who failed to clear S. aureus exhibited a higher nasal S. aureus load and elevated nasal interleukin-1 receptor antagonist (IL-1RA) expression at the preexperiment study visits. We conclude that smokers exhibit higher S. aureus loads than nonsmokers and that innate immune pathways, including G-CSF expression and signaling through the IL-1 axis, are important mediators of nasal S. aureus clearance.
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13
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Lekkerkerk WSN, Haenen A, van der Sande MAB, Leenstra T, de Greeff S, Timen A, Tjon-a-Tsien A, Richardus JH, van de Sande-Bruinsma N, Vos MC. Newly identified risk factors for MRSA carriage in The Netherlands. PLoS One 2017; 12:e0188502. [PMID: 29190731 PMCID: PMC5708665 DOI: 10.1371/journal.pone.0188502] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Accepted: 11/08/2017] [Indexed: 11/25/2022] Open
Abstract
OBJECTIVES To elucidate new risk factors for MRSA carriers without known risk factors (MRSA of unknown origin; MUO). These MUO carriers are neither pre-emptively screened nor isolated as normally dictated by the Dutch Search & Destroy policy, thus resulting in policy failure. METHODS We performed a prospective case control study to determine risk factors for MUO acquisition/carriage (Dutch Trial Register: NTR2041). Cases were MUO carriers reported by participating medical microbiological laboratories to the RIVM from September 1st 2011 until September 1st 2013. Controls were randomly selected from the community during this period. RESULTS Significant risk factors for MUO in logistic multivariate analysis were antibiotic use in the last twelve months, aOR 8.1 (5.6-11.7), screened as contact in a contact tracing but not detected as a MRSA carrier at that time, aOR 4.3 (2.1-8.8), having at least one foreign parent, aOR 2.4 (1.4-3.9) and receiving ambulatory care, aOR 2.3 (1.4-3.7). Our found risk factors explained 83% of the MUO carriage. CONCLUSIONS Identifying new risk factors for MRSA carriers remains crucial for countries that apply a targeted screening approach as a Search and Destroy policy or as vertical infection prevention measure.
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Affiliation(s)
- W. S. N. Lekkerkerk
- Department of Medical Microbiology and Infectious Diseases, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
- RIVM, National Centre for Health and Environment, Bilthoven, The Netherlands
| | - A. Haenen
- RIVM, National Centre for Health and Environment, Bilthoven, The Netherlands
| | - M. A. B. van der Sande
- RIVM, National Centre for Health and Environment, Bilthoven, The Netherlands
- UMCU, Julius Centre, Utrecht, The Netherlands
- The Institute of Tropical Medicine, Antwerp, Belgium
| | - T. Leenstra
- RIVM, National Centre for Health and Environment, Bilthoven, The Netherlands
| | - S. de Greeff
- RIVM, National Centre for Health and Environment, Bilthoven, The Netherlands
| | - A. Timen
- RIVM, National Centre for Health and Environment, Bilthoven, The Netherlands
| | - A. Tjon-a-Tsien
- Municipal Public Health Service Rotterdam Rijnmond, Rotterdam, The Netherlands
| | - J. H. Richardus
- Municipal Public Health Service Rotterdam Rijnmond, Rotterdam, The Netherlands
- Department of Public Health, Erasmus MC, University Medical Center Rotterdam, Rotterdam, the Netherlands
| | | | - M. C. Vos
- Department of Medical Microbiology and Infectious Diseases, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
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14
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Pan HH, Huang YC, Chen CJ, Huang FL, Ting PJ, Huang JY, Chiu CH, Lin TY, Chen PY. Prevalence of and risk factors for nasal methicillin-resistant Staphylococcus aureus colonization among children in central Taiwan. JOURNAL OF MICROBIOLOGY, IMMUNOLOGY, AND INFECTION = WEI MIAN YU GAN RAN ZA ZHI 2017; 52:45-53. [PMID: 29615348 DOI: 10.1016/j.jmii.2016.08.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2016] [Revised: 08/27/2016] [Accepted: 08/30/2016] [Indexed: 11/17/2022]
Abstract
BACKGROUND/PURPOSE Staphylococcus aureus (S. aureus) causes diseases ranging from mild skin infections to invasive diseases. Carriage of S. aureus, including methicillin-resistant S. aureus (MRSA), is a significant risk factor for subsequent staphylococcal infection. Several studies discussed MRSA colonization in Taiwan, but mostly in northern Taiwan. This is the first study that estimates the prevalence of MRSA nasal colonization in healthy children and identifies the potential risk factors in central Taiwan. METHODS A total of 3144 healthy children aged 2-60 months who visited Taichung Veterans General Hospital (TCVGH) were screened for nasal S. aureus carriage from July 2005 to December 2010. Questionnaires included demographic information and potential risk factors for carriage of S. aureus were completed by parents/guardians. RESULTS Prevalence of MSSA and MRSA were 12.09% and 5.25%, respectively. The youngest group aged 2-6 months had the highest S. aureus carriage rate, and the carriage rate revealed a peak in summer. The nasal colonization of Streptococcus pneumoniae (S. pneumoniae) was a protective factor against S. aureus colonization. 85% of the MRSA colonizing isolates belonged to clonal complex 59/staphylococcal cassette chromosome type IV or VT, the local community clone in Taiwan. CONCLUSION An increasing trend of MRSA nasal carriage rate in Taiwan had been brought forward, however, it was not observed in central Taiwan during the period of 2005-2010. We found a summer peak on both MRSA and MSSA carriages.
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Affiliation(s)
- Hui-Hsien Pan
- Department of Pediatrics, Chung-Shan Medical University Hospital, Taichung City, Taiwan; School of Medicine, Chung Shan Medical University, Taichung City, Taiwan
| | - Yhu-Chering Huang
- College of Medicine, Chang Gung University, Taoyuan, Taiwan; Division of Pediatric Infectious Disease, Department of Pediatrics, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Chih-Jung Chen
- College of Medicine, Chang Gung University, Taoyuan, Taiwan; Division of Pediatric Infectious Disease, Department of Pediatrics, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Fang-Liang Huang
- Department of Pediatrics, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Pei-Ju Ting
- Department of Pediatrics, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Jing-Yang Huang
- Institute of Public Health, Department of Public Health, Chung Shan Medical University, Taichung City, Taiwan
| | - Cheng-Hsun Chiu
- College of Medicine, Chang Gung University, Taoyuan, Taiwan; Division of Pediatric Infectious Disease, Department of Pediatrics, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Tzou-Yien Lin
- College of Medicine, Chang Gung University, Taoyuan, Taiwan; Division of Pediatric Infectious Disease, Department of Pediatrics, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Po-Yen Chen
- School of Medicine, Chung Shan Medical University, Taichung City, Taiwan; Department of Pediatrics, Taichung Veterans General Hospital, Taichung, Taiwan.
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15
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Ansari S, Gautam R, Shrestha S, Ansari SR, Subedi SN, Chhetri MR. Risk factors assessment for nasal colonization of Staphylococcus aureus and its methicillin resistant strains among pre-clinical medical students of Nepal. BMC Res Notes 2016; 9:214. [PMID: 27068121 PMCID: PMC4828777 DOI: 10.1186/s13104-016-2021-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Accepted: 04/03/2016] [Indexed: 11/11/2022] Open
Abstract
BACKGROUND Staphylococcus aureus (S. aureus), a normal flora of nasal cavity, can cause minor to life threatening invasive diseases and nosocomial infections. Methicillin resistant strains of S. aureus are causing a great challenge for treatment options. Therefore, the purpose of this study was to assess the nasal carriage rate of S. aureus, its methicillin resistant strains and risk factors in medical students prior to clinical exposure. METHODS The bacterial growth of S. aureus from nasal swab culture was identified by using standard microbiological methods recommended by American Society for Microbiology. Modified Kirby-Bauer disk diffusion method was used for antibiotic susceptibility testing and methicillin resistance was confirmed using cefoxitin and oxacillin disks. D-zone test method was used to determine the inducible clindamycin resistance. RESULTS Among 200 participants, nasal carriage of S. aureus was detected from 30 (15%) subjects. Upper respiratory tract infections significantly (P < 0.05) contributed the carriage of S. aureus and their methicillin resistant strains. All of the isolates were reported to be susceptible to vancomycin and teicoplanin. S. aureus strains detected from 8 (4%) students were confirmed to be methicillin resistant. CONCLUSIONS The result of our study demands for strict policy to screen all the students for nasal carriage of S. aureus and its MRSA strains to minimize the transmission of this organism from community to hospital settings.
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Affiliation(s)
- Shamshul Ansari
- />Department of Microbiology, Chitwan Medical College, Bharatpur, Chitwan, Nepal
| | - Rajendra Gautam
- />Department of Microbiology, Chitwan Medical College, Bharatpur, Chitwan, Nepal
| | - Sony Shrestha
- />Department of Microbiology, Chitwan Medical College, Bharatpur, Chitwan, Nepal
| | | | - Shankar Nanda Subedi
- />Department of Community Medicine and Public Health, Chitwan Medical College, Bharatpur, Chitwan, Nepal
| | - Muni Raj Chhetri
- />Department of Community Medicine and Public Health, Chitwan Medical College, Bharatpur, Chitwan, Nepal
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Freeman S, Okoroafor NO, Gast CM, Koval M, Nowowiejski D, O’Connor E, Harrington RD, Parks JW, Fang FC. Crowdsourced Data Indicate Widespread Multidrug Resistance in Skin Flora of Healthy Young Adults. JOURNAL OF MICROBIOLOGY & BIOLOGY EDUCATION 2016; 17:172-82. [PMID: 27047615 PMCID: PMC4798803 DOI: 10.1128/jmbe.v17i1.1008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
In a laboratory exercise for undergraduate biology majors, students plated bacteria from swabs of their facial skin under conditions that selected for coagulase-negative Staphylococcus; added disks containing the antibiotics penicillin, oxacillin, tetracycline, and erythromycin; and measured zones of inhibition. Students also recorded demographic and lifestyle variables and merged this information with similar data collected from 9,000 other students who had contributed to the database from 2003 to 2011. Minimum inhibitory concentration (MIC) testing performed at the Harborview Medical Center Microbiology Laboratory (Seattle, WA) indicated a high degree of accuracy for student-generated data; species identification with a matrix-assisted laser desorption ionization (MALDI) Biotyper revealed that over 88% of the cells analyzed by students were S. epidermidis or S. capitus. The overall frequency of resistant cells was high, ranging from 13.2% of sampled bacteria resistant to oxacillin to 61.7% resistant to penicillin. Stepwise logistic regressions suggested that recent antibiotic use was strongly associated with resistance to three of the four antibiotics tested (p = 0.0003 for penicillin, p << 0.0001 for erythromycin and tetracycline), and that age, gender, use of acne medication, use of antibacterial soaps, or makeup use were associated with resistance to at least one of the four antibiotics. Furthermore, drug resistance to one antibiotic was closely linked to resistance to the other three antibiotics in every case (all p values << 0.0001), suggesting the involvement of multidrug-resistant strains. The data reported here suggest that citizen science could not only provide an important educational experience for undergraduates, but potentially play a role in efforts to expand antibiotic resistance (ABR) surveillance.
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Affiliation(s)
- Scott Freeman
- Department of Biology University of Washington, Seattle, WA 98195
- Corresponding author. Mailing address: Department of Biology, Box 355320, University of Washington, Seattle, WA 98195. Phone: 206-300-4448. E-mail:
| | | | - Christopher M. Gast
- Interdisciplinary Program in Quantitative Ecology and Resource Management; currently Fred Hutchinson Cancer Research Center, University of Washington, Seattle, WA 98195
| | - Mikhail Koval
- Department of Biology University of Washington, Seattle, WA 98195
| | - David Nowowiejski
- Department of Laboratory Medicine and Harborview Medical Center, University of Washington, Seattle, WA 98195
| | - Eileen O’Connor
- Department of Biology University of Washington, Seattle, WA 98195
| | - Robert D. Harrington
- Department of Allergy and Infectious Diseases, University of Washington, Seattle, WA 98195
| | - John W. Parks
- Department of Biology University of Washington, Seattle, WA 98195
| | - Ferric C. Fang
- Department of Laboratory Medicine and Harborview Medical Center, University of Washington, Seattle, WA 98195
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Krakauer T, Pradhan K, Stiles BG. Staphylococcal Superantigens Spark Host-Mediated Danger Signals. Front Immunol 2016; 7:23. [PMID: 26870039 PMCID: PMC4735405 DOI: 10.3389/fimmu.2016.00023] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Accepted: 01/18/2016] [Indexed: 12/19/2022] Open
Abstract
Staphylococcal enterotoxin B (SEB) of Staphylococcus aureus, and related superantigenic toxins produced by myriad microbes, are potent stimulators of the immune system causing a variety of human diseases from transient food poisoning to lethal toxic shock. These protein toxins bind directly to specific Vβ regions of T-cell receptors (TCR) and major histocompatibility complex (MHC) class II on antigen-presenting cells, resulting in hyperactivation of T lymphocytes and monocytes/macrophages. Activated host cells produce excessive amounts of proinflammatory cytokines and chemokines, especially tumor necrosis factor α, interleukin 1 (IL-1), IL-2, interferon γ (IFNγ), and macrophage chemoattractant protein 1 causing clinical symptoms of fever, hypotension, and shock. Because of superantigen-induced T cells skewed toward TH1 helper cells, and the induction of proinflammatory cytokines, superantigens can exacerbate autoimmune diseases. Upon TCR/MHC ligation, pathways induced by superantigens include the mitogen-activated protein kinase cascades and cytokine receptor signaling, resulting in activation of NFκB and the phosphoinositide 3-kinase/mammalian target of rapamycin pathways. Various mouse models exist to study SEB-induced shock including those with potentiating agents, transgenic mice and an “SEB-only” model. However, therapeutics to treat toxic shock remain elusive as host response genes central to pathogenesis of superantigens have only been identified recently. Gene profiling of a murine model for SEB-induced shock reveals novel molecules upregulated in multiple organs not previously associated with SEB-induced responses. The pivotal genes include intracellular DNA/RNA sensors, apoptosis/DNA damage-related molecules, immunoproteasome components, as well as antiviral and IFN-stimulated genes. The host-wide induction of these, and other, antimicrobial defense genes provide evidence that SEB elicits danger signals resulting in multi-organ damage and toxic shock. Ultimately, these discoveries might lead to novel therapeutics for various superantigen-based diseases.
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Affiliation(s)
- Teresa Krakauer
- Department of Immunology, Molecular Translational Sciences Division, United States Army Medical Research Institute of Infectious Diseases, Fort Detrick , Frederick, MD , USA
| | - Kisha Pradhan
- Biology Department, Wilson College , Chambersburg, PA , USA
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Johnson K, Frei R, Heininger U. Prospective, cross-sectional study on MSSA and MRSA colonisation in hospitalised children. Eur J Pediatr 2015; 174:1255-62. [PMID: 26272252 DOI: 10.1007/s00431-015-2606-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Revised: 07/21/2015] [Accepted: 07/26/2015] [Indexed: 11/29/2022]
Abstract
UNLABELLED There is a global trend for an increase in prevalence of nasal methicillin-resistant Staphylococcus aureus (MRSA) colonisation in children. A decade ago, MRSA colonisation was studied in Swiss paediatric hospitals and revealed an extraordinarily low proportion (<1 %). The primary goal of this study was to determine if the current proportion of nasal colonisation with MRSA in hospitalised children was still favourable. We aimed to screen all children from the age of 0-16 years admitted to the paediatric and surgical wards at the University Children's Hospital Basel (UKBB) during 8 pre-defined surveillance weeks. After obtaining consent, a nasal swab was taken and analysed for growth of S. aureus. Furthermore, a standardised questionnaire was completed by interview with a parent. Of 535 eligible children, 340 (64 %) were enrolled. Mean age was 6.2 years (median 4.3, IQR 1 to 11.25), 111 (33 %) children were colonised with S. aureus but no MRSA was found. CONCLUSION The prevalence of MRSA in children admitted to the UKBB during this surveillance period was zero. General MRSA screening in hospitalised children continues to be unjustified in our area. WHAT IS KNOWN • The prevalence of nasal methicillin-resistant Staphylococcus aureus (MRSA) colonisation in children is increasing in many regions worldwide. • Surveillance for MRSA colonisation in healthcare settings varies considerably. WHAT IS NEW • Periodic and risk-factor-based surveillance for MRSA colonisation is sufficient when regional prevalence is low.
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Affiliation(s)
- Kristen Johnson
- University Children's Hospital, Spitalstrasse 33, PO Box, CH 4031, Basel, Switzerland,
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