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Aziz M, Ejaz SA, Alsfouk BA, Sultan A, Li C. Identification of potential inhibitors against E.coli via novel approaches based on deep learning and quantum mechanics-based atomistic investigations. Arch Biochem Biophys 2023; 747:109761. [PMID: 37734644 DOI: 10.1016/j.abb.2023.109761] [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: 06/06/2023] [Revised: 08/31/2023] [Accepted: 09/18/2023] [Indexed: 09/23/2023]
Abstract
Currently, drug resistance to commercially available antibiotics is imparting negative consequences to global health, and the development of novel antibiotics in a timely manner is a prime need of the hour. In the current study, an e-pharmacophore model was built using the 3D structure of DNA gyrase in complex with a standard inhibitor. The generated model was subjected to a pharmacophore based virtual screening against 45,257,086 molecules having 223,460,579 conformers available in MCULE database. Pharmacophore based screening retrieved eight molecules as top hit based on pharmacophoric features in comparison to standard inhibitors. Afterward, all eight compounds were subjected molecular docking based on deep learning algorithm. The molecular docking revealed that compound MCULE-6042843173 and MCULE-2362244223 had significant binding orientation inside active pocket of targeted protein with binding affinity of -9.52 and -9.24 kcal/mol respectively. In addition, density functional theory studies (DFT) were performed to evaluate quantum mechanics of top ranked compounds which were investigated through quantum mechanics (QM) computations which strongly assisted the findings of other in-silico investigations. Consequently, the MCULE-6042843173 and MCULE-2362244223 were subjected to MD simulation studies for evaluation of stability, hydrogen bond analysis, van der Waals interactions, and the contact profile of compounds with targeted amino acid residues. Findings of current study suggested MCULE-6042843173 and MCULE-2362244223 as potential and novel inhibitor of DNA Gyrase enzyme.
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Affiliation(s)
- Mubashir Aziz
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, The Islamia University of Bahawalpur, Bahawalpur, 63100, Pakistan
| | - Syeda Abida Ejaz
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, The Islamia University of Bahawalpur, Bahawalpur, 63100, Pakistan.
| | - Bshra A Alsfouk
- Department of Pharmaceutical Sciences, College of Pharmacy, Princess Nourah Bint Abdulrahman University, P.O Box 84428, Riyadh, 11671, Saudi Arabia
| | - Ahlam Sultan
- Department of Pharmaceutical Sciences, College of Pharmacy, Princess Nourah Bint Abdulrahman University, P.O Box 84428, Riyadh, 11671, Saudi Arabia
| | - Chen Li
- Department of Biology, Chemistry, Pharmacy, Free University of Berlin, Berlin, 14195, Germany.
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2
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Kluytmans J. Prevention of surgical site infections: a personal odyssey. J Hosp Infect 2023:S0195-6701(23)00159-7. [PMID: 37344328 DOI: 10.1016/j.jhin.2023.05.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Accepted: 05/18/2023] [Indexed: 06/23/2023]
Affiliation(s)
- J Kluytmans
- Department of Medical Microbiology, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands.
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3
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Quero S, Serras-Pujol M, Párraga-Niño N, Torres C, Navarro M, Vilamala A, Puigoriol E, de los Ríos JD, Arqué E, Serra-Pladevall J, Romero A, Molina D, Paredes R, Pedro-Botet ML, Reynaga E. Methicillin-resistant and methicillin-sensitive Staphylococcus aureus in pork industry workers, Catalonia, Spain. One Health 2023; 16:100538. [PMID: 37363245 PMCID: PMC10288084 DOI: 10.1016/j.onehlt.2023.100538] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2022] [Revised: 04/05/2023] [Accepted: 04/06/2023] [Indexed: 06/28/2023] Open
Abstract
Background Methicillin-resistant S. aureus (MRSA) especially ST398, is a zoonotic agent. This study aimed to determine the prevalence of methicillin-susceptible S. aureus (MSSA) and MRSA among workers in the pork production chain. Methods 659 workers associated with 123 pig farms, livestock transporters, one pig slaughterhouse, pork transporters and 23 pork butcheries were studied for S. aureus recovery, and all isolates were characterized (antibiotic resistance, MLST and spa-typing). Results The prevalence of S. aureus was 35.5%, 75.6% of isolates being MRSA. The prevalence of MRSA was 68.7% (149/217) among pig farm, 33.9% (19/56) livestock transporters, 2.9% (9/306) slaughterhouse, 0% in pork transporters (0/36) and butchery workers (0/44). Of the 234 S. aureus-positive workers, 100% (149/149) of pig farm workers, 82.6% (19/23) of livestock transporters, and 16.4% (9/55) of slaughterhouse workers carried MRSA isolates (p < 0.001). Of the workers who had contact with live swine, 61.8% (178/288) were S. aureus-positive, MRSA being detected in 96.1% of cases (p < 0.001). The most frequent lineage among MRSA were: ST398 (97.7%; 173/177) and ST1 (1.7%; 3/177); and among MSSA were ST30 (19.2%; 11/57) and ST5 (10.5%; 6/57). The most frequent spa-types among MRSA were t011 (93.8%, 166/177) and t1451 (2.25%, 4/177), and among MSSA: t084 (10.5%, 6/57) and t021 (7.0%, 4/57). All MRSA isolates showed resistance to tetracycline, 92.7% to clindamycin, 81.9% to erythromycin and 40.1% to cotrimoxazole. Conclusions Pig industry workers having occupational contact with live animals present a high risk of colonization of MRSA, especially by MRSA-ST398. Prevention measures should be intensified in any employment sector involving live animals.
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Affiliation(s)
- Sara Quero
- Infectious Diseases Unit, Health Sciences Research Institute of the Germans Trias i Pujol Foundation, Badalona, Barcelona, Spain
- CIBER de Enfermedades Respiratorias, Madrid, Spain
| | - Marina Serras-Pujol
- Internal Medicine Department, Hospital Universitari de Vic, Barcelona, Spain
- Department of Medicine, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Noemí Párraga-Niño
- Infectious Diseases Unit, Health Sciences Research Institute of the Germans Trias i Pujol Foundation, Badalona, Barcelona, Spain
| | - Carmen Torres
- Area de Bioquímica y Biología Molecular, Universidad de La Rioja, Logroño, Spain
| | - Marian Navarro
- Microbiology Department, Hospital Universitari de Vic, Barcelona, Spain
| | - Anna Vilamala
- Microbiology Department, Hospital Universitari de Vic, Barcelona, Spain
| | - Emma Puigoriol
- Epidemiology Department, Hospital Universitari de Vic, Barcelona, Spain
| | | | - Elisenda Arqué
- Infectious Diseases Unit, Health Sciences Research Institute of the Germans Trias i Pujol Foundation, Badalona, Barcelona, Spain
| | | | - Alba Romero
- Fundació Lluita Contra les Infeccions, Infectious Diseases Department, Hospital Universitari Germans Trias i Pujol, Badalona, Barcelona, Spain
| | - Daniel Molina
- Fundació Lluita Contra les Infeccions, Infectious Diseases Department, Hospital Universitari Germans Trias i Pujol, Badalona, Barcelona, Spain
| | - Roger Paredes
- Fundació Lluita Contra les Infeccions, Infectious Diseases Department, Hospital Universitari Germans Trias i Pujol, Badalona, Barcelona, Spain
- IrsiCaixa AIDS Reseach institute, Hospital Germans Trias i Pujol, Badalona, Barcelona, Spain
- CIBERINFECT, ISCIII, Madrid, Spain
| | - Maria Luisa Pedro-Botet
- Infectious Diseases Unit, Health Sciences Research Institute of the Germans Trias i Pujol Foundation, Badalona, Barcelona, Spain
- CIBER de Enfermedades Respiratorias, Madrid, Spain
- Department of Medicine, Universitat Autònoma de Barcelona, Barcelona, Spain
- Fundació Lluita Contra les Infeccions, Infectious Diseases Department, Hospital Universitari Germans Trias i Pujol, Badalona, Barcelona, Spain
| | - Esteban Reynaga
- Infectious Diseases Unit, Health Sciences Research Institute of the Germans Trias i Pujol Foundation, Badalona, Barcelona, Spain
- Internal Medicine Department, Hospital Universitari de Vic, Barcelona, Spain
- Department of Medicine, Universitat Autònoma de Barcelona, Barcelona, Spain
- Fundació Lluita Contra les Infeccions, Infectious Diseases Department, Hospital Universitari Germans Trias i Pujol, Badalona, Barcelona, Spain
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Scarborough RO, Sri AE, Browning GF, Hardefeldt LY, Bailey KE. ‘Brave Enough’: A Qualitative Study of Veterinary Decisions to Withhold or Delay Antimicrobial Treatment in Pets. Antibiotics (Basel) 2023; 12:antibiotics12030540. [PMID: 36978407 PMCID: PMC10044613 DOI: 10.3390/antibiotics12030540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 02/24/2023] [Accepted: 02/27/2023] [Indexed: 03/11/2023] Open
Abstract
Veterinarians sometimes prescribe antimicrobials even when they know or suspect that they are unnecessary. The drivers of this behaviour must be understood to design effective antimicrobial stewardship interventions. Semi-structured interviews were conducted with 22 veterinarians who treated companion animals in Australia. The Theory of Planned Behaviour was used to organise interview themes, focusing on a decision to withhold antimicrobial therapy in the absence of a clear indication. Many background factors influenced antimicrobial-withholding decisions, including the veterinarian’s communication skills, general attitudes towards antimicrobial resistance (AMR), habits and energy levels. Client awareness of AMR and the veterinarian–client relationship were also important. Beliefs about the consequences of withholding antimicrobials (behavioural beliefs) were dominated by fears of the animal’s condition deteriorating and of failing to meet client expectations. These fears, weighed against the seemingly distant consequences of AMR, were major barriers to withholding antimicrobials. Normative beliefs were primarily focused on the expected approval (or disapproval) of the client and of other veterinarians. Control beliefs about the difficulty of withholding antimicrobials centred around client factors, most importantly, their capacity to adequately monitor their animal, to pay for further investigations, or to undertake non-antimicrobial management, such as wound care, at home. The use of antimicrobials by companion animal veterinarians in the absence of a clear indication is often powerfully driven by behavioural beliefs, chiefly, fears of clinical deterioration and of failing to meet client expectations.
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Affiliation(s)
- Ri O. Scarborough
- Asia-Pacific Centre for Animal Health, Melbourne Veterinary School, University of Melbourne, Parkville, VIC 3010, Australia
- National Centre for Antimicrobial Stewardship, Peter Doherty Institute, Parkville, VIC 3052, Australia
- Correspondence:
| | - Anna E. Sri
- Asia-Pacific Centre for Animal Health, Melbourne Veterinary School, University of Melbourne, Parkville, VIC 3010, Australia
- National Centre for Antimicrobial Stewardship, Peter Doherty Institute, Parkville, VIC 3052, Australia
| | - Glenn F. Browning
- Asia-Pacific Centre for Animal Health, Melbourne Veterinary School, University of Melbourne, Parkville, VIC 3010, Australia
- National Centre for Antimicrobial Stewardship, Peter Doherty Institute, Parkville, VIC 3052, Australia
| | - Laura Y. Hardefeldt
- Asia-Pacific Centre for Animal Health, Melbourne Veterinary School, University of Melbourne, Parkville, VIC 3010, Australia
- National Centre for Antimicrobial Stewardship, Peter Doherty Institute, Parkville, VIC 3052, Australia
| | - Kirsten E. Bailey
- Asia-Pacific Centre for Animal Health, Melbourne Veterinary School, University of Melbourne, Parkville, VIC 3010, Australia
- National Centre for Antimicrobial Stewardship, Peter Doherty Institute, Parkville, VIC 3052, Australia
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Amin H, Marshall IPG, Bertelsen RJ, Wouters IM, Schlünssen V, Sigsgaard T, Šantl-Temkiv T. Optimization of bacterial DNA and endotoxin extraction from settled airborne dust. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 857:159455. [PMID: 36252657 DOI: 10.1016/j.scitotenv.2022.159455] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 10/03/2022] [Accepted: 10/11/2022] [Indexed: 06/16/2023]
Abstract
Collecting and obtaining sufficient amount of airborne particles for multiple microbial component assessments can be challenging. A passive dust sampling device, the electrostatic dust fall collector (EDC) has been established for assessing airborne exposures including endotoxin and glucans. Recently, with advances in next-generation sequencing techniques, EDCs were used to collect microbial cells for DNA sequencing analysis to promote the study of airborne bacterial and fungal communities. However, low DNA yields have been problematic when employing passive sampling with EDC. To address this challenge, we attempted to increase the efficiency of extraction. We compared DNA extraction efficiency of bacterial components from EDCs captured on filters through filtration using five extraction techniques. By measuring the abundance, diversity and structure of bacterial communities using qPCR and amplicon sequencing targeting 16S rRNA genes, we found that two techniques outperformed the rest. Furthermore, we developed protocols to simultaneously extract both DNA and endotoxin from a single EDC cloth. Our technique promotes a high quality to price ratio and may be employed in large epidemiological studies addressing airborne bacterial exposure where a large number of samples is needed.
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Affiliation(s)
- Hesham Amin
- Department of Clinical Science, University of Bergen, Bergen, Norway.
| | - Ian P G Marshall
- Section for Microbiology, Department of Biology, Aarhus University, Aarhus, Denmark
| | - Randi J Bertelsen
- Department of Clinical Science, University of Bergen, Bergen, Norway
| | - Inge M Wouters
- Institute for Risk Assessment Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, the Netherlands
| | - Vivi Schlünssen
- Department of Clinical Science, University of Bergen, Bergen, Norway
| | - Torben Sigsgaard
- Department of Public Health, Environment, Work and Health, Danish Ramazzini Centre, Aarhus University, Aarhus, Denmark
| | - Tina Šantl-Temkiv
- Section for Microbiology, Department of Biology, Aarhus University, Aarhus, Denmark
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Konstantinovski MM, Schouls LM, Witteveen S, Claas ECJ, Kraakman ME, Kalpoe J, Mattson E, Hetem DJ, van Elzakker EPM, Kerremans J, Hira V, Bosch T, Gooskens J. Livestock-associated methicillin-resistant Staphylococcus aureus epidemiology, genetic diversity, and clinical characteristics in an urban region. Front Microbiol 2022; 13:875775. [PMID: 36590396 PMCID: PMC9795226 DOI: 10.3389/fmicb.2022.875775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Accepted: 11/08/2022] [Indexed: 12/15/2022] Open
Abstract
Objectives While Livestock-associated methicillin-resistant Staphylococcus aureus (LA-MRSA), defined as CC398, is a well-known pathogen among those working with livestock, there are indications that LA-MRSA prevalence among the general population is increasing. However, the clinical impact in urban areas remains unknown. The aim of this study was to assess the genetic epidemiology and clinical characteristics of LA-MRSA in an urban area with a limited livestock population. Methods In this retrospective study, we evaluated LA-MRSA strains that were collected between 2014 and 2018 from patients who received clinical care in a single urban area in Netherlands. Patient files were assessed for livestock exposure data, clinical findings, and contact tracing information. Next-generation sequencing (NGS) analysis in combination with wgMLST was conducted to assess genetic diversity and relatedness and to detect virulence and resistance genes. Results LA-MRSA strains were cultured from 81 patients, comprising 12% of all the MRSA strains found in seven study laboratories between 2014 and 2018. No livestock link was found in 76% of patients (n = 61), and 28% of patients (n = 23) had an infection, mostly of the skin or soft tissue. Contact tracing had been initiated in 14 cases, leading to the identification of two hospital transmissions: a cluster of 9 cases and one of 2 cases. NGS data were available for 91% (n = 75) of the patients. wgMLST confirmed the clusters detected via contact tracing (n = 2) and identified 5 additional clusters without a known epidemiological link. Relevant resistance and virulence findings included the PVL virulence gene (3 isolates) and tetracycline resistance (79 isolates). Conclusion LA-MRSA may cause a relevant burden of disease in urban areas. Surprisingly, most infections in the present study occurred in the absence of a livestock link, suggesting inter-human transmission. These findings and the presence of PVL and other immune evasive complex virulence genes warrant future surveillance and preventative measures.
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Affiliation(s)
- Maria M. Konstantinovski
- Department of Medical Microbiology, Leiden University Medical Center, Leiden, Netherlands,Department of Microbiology, Medical Laboratories, Reinier de Graaf Groep, Delft, Netherlands,*Correspondence: Maria M. Konstantinovski,
| | - Leo M. Schouls
- Center for Infectious Diseases Research, Diagnostics and Laboratory Surveillance, National Institute for Public Health and the Environment (RIVM), Bilthoven, Netherlands
| | - Sandra Witteveen
- Center for Infectious Diseases Research, Diagnostics and Laboratory Surveillance, National Institute for Public Health and the Environment (RIVM), Bilthoven, Netherlands
| | - Eric C. J. Claas
- Department of Medical Microbiology, Leiden University Medical Center, Leiden, Netherlands
| | - Margriet E. Kraakman
- Department of Medical Microbiology, Leiden University Medical Center, Leiden, Netherlands
| | - Jayant Kalpoe
- Department of Medical Microbiology, Regional Laboratory of Public Health Kennemerland, Haarlem, Netherlands
| | - Eva Mattson
- Department of Microbiology, Medical Laboratories, Reinier de Graaf Groep, Delft, Netherlands
| | - David J. Hetem
- Department of Medical Microbiology, Haaglanden Medical Center, The Hague, Netherlands
| | | | - Jos Kerremans
- Department of Medical Microbiology, Alrijne Hospital, Leiderdorp, Netherlands
| | - Vishal Hira
- Department of Medical Microbiology and Infection Prevention, Groene Hart Ziekenhuis, Gouda, Netherlands
| | - Thijs Bosch
- Center for Infectious Diseases Research, Diagnostics and Laboratory Surveillance, National Institute for Public Health and the Environment (RIVM), Bilthoven, Netherlands
| | - Jairo Gooskens
- Department of Medical Microbiology, Leiden University Medical Center, Leiden, Netherlands
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Kontro MH, Kirsi M, Laitinen SK. Exposure to bacterial and fungal bioaerosols in facilities processing biodegradable waste. Front Public Health 2022; 10:789861. [PMID: 36466510 PMCID: PMC9708704 DOI: 10.3389/fpubh.2022.789861] [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: 10/05/2021] [Accepted: 10/21/2022] [Indexed: 11/17/2022] Open
Abstract
The aim of the study was to determine the exposure of workers within biodegradable waste processing facilities to bacteria and fungi to identify any exposures of potential concern to health. Occupational measurements were performed in six composting and three bioenergy (bioethanol or methane/biogas) producing facilities. Bioaerosols were measured from breathing zones with Button aerosol or open face cassette filter samplers, and swab specimens were taken from the nasal mucous membranes of the workers. Aspergillus fumigatus, Bacillus cereus group, Campylobacter spp., Salmonella spp., Streptomyces spp., and Yersinia spp. were determined by real-time polymerase chain reaction (qPCR). A. fumigatus, and mesophilic and thermophilic actinobacteria were also cultivated from filters. Bacterial airborne endotoxins collected by IOM samplers were analyzed using a Limulus assay. Bioaerosol levels were high, especially in composting compared to bioenergy producing facilities. Endotoxin concentrations in composting often exceeded the occupational exposure value of 90 EU/m3, which may be harmful to the health. In addition to endotoxins, the concentrations of A. fumigatus (up to 2.4 × 105 copies/m3) and actinobacteria/Streptomyces spp. (up to 1.6 × 106 copies/m3) in the air of composting facilities were often high. Microbial and endotoxin concentrations were typically highest in waste reception and pre-treatment, equal or decreased during processing and handling of treated waste, and lowest in wheel loader cabins and control rooms/outdoors. Still, the parameters measured in wheel loader cabins were often higher than in the control sites, which suggests that the use of preventive measures could be improved. B. cereus group, Salmonella spp., and Yersinia spp. were rarely detected in bioaerosols or nasal swabs. Although Campylobacter spp. DNA was rarely detected in air, as a new finding, Campylobacter ureolyticus DNA was frequently detected in the nasal mucous membranes of workers, based on partial 16S rDNA sequencing. Moreover, especially A. fumigatus and C. ureolyticus spp. DNA concentrations in swabs after the work shift were significantly higher than before the shift, which indicates their inhalation or growth during the work shift. Microbial qPCR analysis of bioaerosols and swab samples of nasal mucosa allowed measuring exposure in various work operations and during the work shift, identifying problems for health risk assessment to improve working conditions, and evaluating the effectiveness of preventive measures and personal protection of workers.
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Affiliation(s)
- Merja H. Kontro
- Ecosystems and Environment Research Programme, University of Helsinki, Helsinki, Finland
| | - Maija Kirsi
- Work Environment Laboratories, Finnish Institute of Occupational Health, Helsinki, Finland
| | - Sirpa K. Laitinen
- Department of Occupational Safety, Finnish Institute of Occupational Health, Helsinki, Finland,*Correspondence: Sirpa K. Laitinen
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Viegas C, Pena P, Dias M, Gomes B, Cervantes R, Carolino E, Twarużek M, Soszczyńska E, Kosicki R, Caetano LA, Viegas S. Microbial contamination in waste collection: Unveiling this Portuguese occupational exposure scenario. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 314:115086. [PMID: 35483278 DOI: 10.1016/j.jenvman.2022.115086] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 03/10/2022] [Accepted: 04/13/2022] [Indexed: 05/22/2023]
Abstract
Previous studies anticipated that microorganisms and their metabolites in waste will increase as a consequence of a decreased collection frequency and due to differences in what kind of waste is bagged before collection leading to an increased exposure of workers handling the waste. This study aim was to investigate the microbial contamination present in the waste collection trucks (WCT) and in the support facilities (waste collection station - WCS). It was applied a multi-approach protocol using active (air sampling by impingement and impaction) and passive (surface swabs, electrostatic dust cloths and settled dust) sampling methods. The screening of azole-resistance, the investigation of mycotoxins and the assessment of the elicited biological responses in vitro were also carried out aiming recognizing the possible health effects of waste collection drivers. SARS-CoV-2 detection was also performed. In WCS only air samples had contamination in all the four sampling sites (canteen, operational removal core, operational removal center, and administrative service). Among all the analyzed matrices from the WCT a higher percentage of total bacterial counts and Gram-was detected in swabs (66.93%; 99.36%). In WCS the most common species were Penicillium sp. (43.98%) and Cladosporium sp. (24.68%), while on WCT Aspergillus sp. (4.18%) was also one of the most found. In the azole resistance screening Aspergillus genera was not observed in the azole-supplemented media. SARS-CoV-2 was not detected in any of the environmental samples collected, but Aspergillus section Fumigati was detected in 5 samples. Mycotoxins were not detected in EDC from WCS, while in WCT they were detected in filters (N = 1) and in settled dust samples (N = 16). In conclusion, our study reveals that a comprehensive sampling approach using active and passive sampling (e.g. settled dust sampling for a representative mycotoxin evaluation) and combined analytic methods (i.e., culture-based and molecular) is an important asset in microbial exposure assessments. Concerning the waste collection exposure scenario, the results of this study unveiled a complex exposure, particularly to fungi and their metabolites. Aspergillus section Fumigati highlight the significance of targeting this section in the waste management industry as an indicator of occupational health risk.
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Affiliation(s)
- Carla Viegas
- H&TRC - Health & Technology Research Center, ESTeSL - Escola Superior de Tecnologia e Saúde, Instituto Politécnico de Lisboa, Portugal; NOVA National School of Public Health, Public Health Research Centre, Universidade Nova de Lisboa, Portugal; Comprehensive Health Research Center (CHRC), Portugal.
| | - Pedro Pena
- H&TRC - Health & Technology Research Center, ESTeSL - Escola Superior de Tecnologia e Saúde, Instituto Politécnico de Lisboa, Portugal
| | - Marta Dias
- H&TRC - Health & Technology Research Center, ESTeSL - Escola Superior de Tecnologia e Saúde, Instituto Politécnico de Lisboa, Portugal; NOVA National School of Public Health, Public Health Research Centre, Universidade Nova de Lisboa, Portugal; Comprehensive Health Research Center (CHRC), Portugal
| | - Bianca Gomes
- H&TRC - Health & Technology Research Center, ESTeSL - Escola Superior de Tecnologia e Saúde, Instituto Politécnico de Lisboa, Portugal
| | - Renata Cervantes
- H&TRC - Health & Technology Research Center, ESTeSL - Escola Superior de Tecnologia e Saúde, Instituto Politécnico de Lisboa, Portugal
| | - Elisabete Carolino
- H&TRC - Health & Technology Research Center, ESTeSL - Escola Superior de Tecnologia e Saúde, Instituto Politécnico de Lisboa, Portugal
| | - Magdalena Twarużek
- Kazimierz Wielki University, Faculty of Biological Sciences, Department of Physiology and Toxicology, Chodkiewicza 30, 85-064, Bydgoszcz, Poland
| | - Ewelina Soszczyńska
- Kazimierz Wielki University, Faculty of Biological Sciences, Department of Physiology and Toxicology, Chodkiewicza 30, 85-064, Bydgoszcz, Poland
| | - Robert Kosicki
- Kazimierz Wielki University, Faculty of Biological Sciences, Department of Physiology and Toxicology, Chodkiewicza 30, 85-064, Bydgoszcz, Poland
| | - Liliana Aranha Caetano
- H&TRC - Health & Technology Research Center, ESTeSL - Escola Superior de Tecnologia e Saúde, Instituto Politécnico de Lisboa, Portugal; Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, University of Lisbon, Lisbon, Portugal
| | - Susana Viegas
- H&TRC - Health & Technology Research Center, ESTeSL - Escola Superior de Tecnologia e Saúde, Instituto Politécnico de Lisboa, Portugal; NOVA National School of Public Health, Public Health Research Centre, Universidade Nova de Lisboa, Portugal; Comprehensive Health Research Center (CHRC), Portugal
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Clonal distribution and antimicrobial resistance of methicillin-susceptible and -resistant Staphylococcus aureus strains isolated from broiler farms, slaughterhouses, and retail chicken meat. Poult Sci 2022; 101:102070. [PMID: 36041389 PMCID: PMC9449669 DOI: 10.1016/j.psj.2022.102070] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 07/19/2022] [Accepted: 07/20/2022] [Indexed: 11/23/2022] Open
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10
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Viegas C, Dias M, Viegas S. Electrostatic Dust Cloth: A Useful Passive Sampling Method When Assessing Exposure to Fungi Demonstrated in Studies Developed in Portugal (2018–2021). Pathogens 2022; 11:pathogens11030345. [PMID: 35335669 PMCID: PMC8955157 DOI: 10.3390/pathogens11030345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 02/23/2022] [Accepted: 03/10/2022] [Indexed: 11/16/2022] Open
Abstract
Electrostatic dust cloths (EDC) have been widely used for microbiologic contamination assessment in different indoor and occupational environments. This paper reviews sixteen studies performed in Portugal between 2018 and 2021 for evaluating the exposure to microbiological agents and focusing on fungi using EDC as a passive sampling method. The findings suggest that EDC can be applied as a screening method for particulate matter-exposure assessment and as a complementary method to characterize microbial exposures in occupational environments. Overall, EDC should be included, side by side with other sampling methods, in sampling campaigns focused on exposure assessments due to the advantages such as the straightforward extraction protocol favoring the employment of different assays, which allows us to assess exposure to a wide range of microbial agents, and presents higher accuracy regarding the fungal diversity.
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Affiliation(s)
- Carla Viegas
- H&TRC—Health & Technology Research Center, ESTeSL—Escola Superior de Tecnologia da Saúde, Instituto Politécnico de Lisboa, 1990-096 Lisbon, Portugal; (M.D.); (S.V.)
- Public Health Research Centre, NOVA National School of Public Health, Universidade NOVA de Lisboa, 1099-085 Lisbon, Portugal
- Comprehensive Health Research Center (CHRC), NOVA Medical School, Universidade NOVA de Lisboa, 1169-056 Lisbon, Portugal
- Correspondence:
| | - Marta Dias
- H&TRC—Health & Technology Research Center, ESTeSL—Escola Superior de Tecnologia da Saúde, Instituto Politécnico de Lisboa, 1990-096 Lisbon, Portugal; (M.D.); (S.V.)
- Public Health Research Centre, NOVA National School of Public Health, Universidade NOVA de Lisboa, 1099-085 Lisbon, Portugal
- Comprehensive Health Research Center (CHRC), NOVA Medical School, Universidade NOVA de Lisboa, 1169-056 Lisbon, Portugal
| | - Susana Viegas
- H&TRC—Health & Technology Research Center, ESTeSL—Escola Superior de Tecnologia da Saúde, Instituto Politécnico de Lisboa, 1990-096 Lisbon, Portugal; (M.D.); (S.V.)
- Public Health Research Centre, NOVA National School of Public Health, Universidade NOVA de Lisboa, 1099-085 Lisbon, Portugal
- Comprehensive Health Research Center (CHRC), NOVA Medical School, Universidade NOVA de Lisboa, 1169-056 Lisbon, Portugal
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Genomic Epidemiology and Characterization of Methicillin-Resistant Staphylococcus aureus from Bloodstream Infections in China. mSystems 2021; 6:e0083721. [PMID: 34726482 PMCID: PMC8562482 DOI: 10.1128/msystems.00837-21] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Since 2010, methicillin-resistant Staphylococcus aureus (MRSA) ST59 began to increase in prevalence in China, gradually replacing ST239 and has become the dominant clone in most hospitals in China. Here, we investigated the changing epidemiology, phylogenetic reconstruction, and genomic characterization of MRSA clones in China to identify the genomic driving factors in the prevalence of ST59. Most MRSA isolates were identified as ST59 (36.98%; 277/749), which increased from 25.09% in 2014 to 35.53% in 2019. The phylogenetic analysis of the 749 MRSA isolates showed a high level of diversity and the copresence of hospital-associated, community-associated, livestock-associated, and hypervirulent clones. Furthermore, minimum spanning trees revealed that ST59 MRSA clones from different hospitals and regions were integrated, suggesting that frequent exchanges had occurred between regions and hospitals. ST59 clones displayed higher susceptibility to antimicrobials than did ST239 and ST5 MRSA clones, indicating that resistance to non-β-lactam and fluoroquinolone antibiotics may be not critical for the epidemic success of ST59 clones. Virulence factors detection showed that sak and chp genes enriched in MRSA ST59 may be associated with the enhanced spreading success of ST59, whereas qacA may have contributed to the predominance of ST5 in East China. Our refined analysis of different clones among ST239, ST5, ST59, and ST398 demonstrated the existence of potential driving factors for the evolution of nosocomial MRSA populations and diversity of the evolutionary events surrounding clonal replacement. IMPORTANCE As a developing country, China has an unbalanced health care system due to regional differences in economic development. However, China is also a country worthy of study with regard to the population dynamics of MRSA within the more resource-rich health care systems. In this study, we carried out genomic analysis to investigate the genomic epidemiology and characterization of MRSA isolated from bloodstream infections over a timespan of 6 years. Our refined analysis of different MRSA clones among ST59, ST5, ST239, and ST398 demonstrated the existence of driving factors for the evolution of nosocomial MRSA populations and diversity of the evolutionary events surrounding clonal replacement.
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Dynamics of the Human Nasal Microbiota and Staphylococcus aureus CC398 Carriage in Pig Truck Drivers across One Workweek. Appl Environ Microbiol 2021; 87:e0122521. [PMID: 34191530 PMCID: PMC8388827 DOI: 10.1128/aem.01225-21] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Drivers of pig trucks constitute a potential route of human transmission of livestock-associated methicillin-resistant Staphylococcus aureus clonal complex 398 (LA-MRSA CC398). In this study, we determined MRSA prevalence in pig truck drivers (n = 47) and monitored the nasal microbiota of 9 drivers 3 times daily throughout 1 workweek (n = 113 samples) and compared it to that of their spouses (n = 25 samples from 6 spouses) and 89 nonexposed subjects. S. aureus isolates (n = 232) derived from a subset of nasal and truck samples were whole-genome sequenced. The nasal alpha diversity of drivers in the beginning of the workday was lower than that of nonexposed subjects. During the workday, it increased significantly. Similarly, the drivers’ nasal composition shifted during the workday, becoming increasingly different from that of their spouses and nonexposed individuals. Clustering into community state types (CSTs) revealed frequent switches from either S. aureus- or Corynebacterium-dominated CSTs in the mornings to a Psychrobacter-dominated CST during the workday. Six intermittent MRSA carriers were mostly MRSA negative in the mornings, and their nasal microbiota resembled that of nonexposed subjects. When acquiring MRSA during the workday, they switched to the Psychrobacter-dominated CST. In contrast, the nasal microbiota of two persistent MRSA carriers was dominated by staphylococci. In conclusion, we show that the nasal microbiota of pig truck drivers is very dynamic, undergoes drastic changes during workdays, and differs from that of nonexposed subjects even before pig contact. MRSA-carrying drivers may eventually introduce MRSA into the community and health care facilities. Carriage dynamics, however, showed that for most drivers, CC398 MRSA is rapidly lost and only rarely causes transmission to spouses. IMPORTANCE In Denmark, the number of human methicillin-resistant Staphylococcus aureus (MRSA) cases has increased dramatically since the early 2000s, starting from imported cases and spreading in the community. However, today, approximately one-third of all new cases are attributed to livestock-associated MRSA clonal complex 398 (LA-MRSA CC398). This mirrors the increase in pig farms, of which 95% are now positive for LA-MRSA, and this has been caused mainly by three dominant lineages enriched for a number of key antimicrobial resistance genes. Although most human LA-MRSA CC398 infections in Denmark are linked to livestock contact, still up to one-third are not. Pig truck drivers constitute a previously understudied occupation group which may transmit LA-MRSA CC398 to household members, the community, and hospitals. In this study, we demonstrate dramatic work-related changes in the nasal microbiota of pig truck drivers, as well as in their carriage of LA-MRSA CC398. However, they likely do not constitute an important reservoir for LA-MRSA CC398 dissemination.
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Jin Y, Yu X, Chen Y, Chen W, Shen P, Luo Q, Zhang S, Kong X, Zheng B, Xiao Y. Characterization of highly virulent community-associated methicillin-resistant Staphylococcus aureus ST9-SCC mec XII causing bloodstream infection in China. Emerg Microbes Infect 2021; 9:2526-2535. [PMID: 33174510 PMCID: PMC7717876 DOI: 10.1080/22221751.2020.1848354] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Previous studies have shown that livestock (LA)-MRSA ST398 evolved from a human-adapted methicillin-susceptible S. aureus (MSSA) clone. However, detailed information regarding ST9 is still unclear. Here, we characterized a community-associated methicillin-resistant Staphylococcus aureus (CA-MRSA) ST9-SCCmec XII isolate that has not been previously reported to cause serious disease in China. We obtained whole-genome sequences of one ST9-t899-XII isolate—ZY462471—from a patient with bloodstream infection without livestock contact. The antibiotic susceptibilities of ZY462471 were determined and the clinical information was extracted from medical notes and compared with twenty-seven previously sequenced genomes. Phylogenetic reconstruction was performed to investigate the probable host evolutionary origins of ZY462471, and the difference in resistome and virulence factors were investigated. Virulence assay was performed to evaluate the high virulence potential of ZY462471 and compare the virulence between the closest ST9 MSSA neighbours. Clinical data suggested that ZY462471 is a CA-MRSA. Phylogenetic analysis showed a much closer relationship of ZY462471 with human-associated MSSA ST9 isolates than other LA-MRSA ST9 isolates, suggesting that ZY462471 probably evolved from ST9 MSSA predecessors by acquiring an SCCmec cassette. Importantly, virulence assays indicated that ZY462471 was highly virulent and compared with the MSSA ST9 predecessors, ZY462471 did not show attenuated virulence. Finally, we found that ZY462471 harboured an immune evasion cluster (IEC)-carrying βC-Φ, which is typically found in human clinical S. aureus rather than LA-MRSA isolates, suggesting that ZY4762471 obtained the IEC-carrying βC-Φs from human clinical S. aureus strains. Considering its high virulence potential, this strain should be monitored to prevent more widespread dissemination.
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Affiliation(s)
- Ye Jin
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Xiao Yu
- Department of Respiratory and Critical Care Medicine, First Hospital of Shanxi Medical University, Taiyuan, China
| | - Yunbo Chen
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Weiwei Chen
- Department of Laboratory Medicine, First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Pin Shen
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Qixia Luo
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Shuntian Zhang
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Xiaoyang Kong
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Beiwen Zheng
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yonghong Xiao
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
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Karlsen OM, Sandbu KD, Grøntvedt CA. Findings and measures to eradicate methicillin resistant Staphylococcus aureus clonal complex 7 spa-type t091 in two Norwegian pig farms: a case report. Porcine Health Manag 2021; 7:40. [PMID: 34134786 PMCID: PMC8207631 DOI: 10.1186/s40813-021-00218-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Accepted: 05/07/2021] [Indexed: 11/10/2022] Open
Abstract
Background The Norwegian LA-MRSA surveillance and control strategy in pig farms has been largely successful in preventing the establishment of MRSA in the pig population by identifying positive pig herds and eradicating MRSA from these. It can, however, be challenging to determine whether a particular type of MRSA is livestock-associated, particularly in cases where there is little evidence available to aid in classification. Case presentation In two Norwegian pig farms linked by trade of live pigs, MRSA CC7 t091 was found in samples from pigs and their environment. Longitudinal sampling, with a time interval of 25 days, in one farm demonstrated an increase in samples positive for MRSA CC7 t091, supporting a classification of the finding as livestock associated. Measures to eradicate MRSA from both farms were imposed by the National Food Safety Authority. Different measures of MRSA sanitation were applied in the two farms, and MRSA was successfully eradicated from both farms. Conclusions A high-cost, labor intensive and a lower-cost, less labor intensive MRSA eradication protocol, both including total depopulation and repopulation were successful in eradicating MRSA CC7 t091 from two case farms.
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Affiliation(s)
| | - K D Sandbu
- Norwegian Food Safety Authority, Felles postmottak, Postboks 383, 2381, Brumunddal, Norway
| | - C A Grøntvedt
- Norwegian Veterinary Institute, P.O. Box 64, 1431, Ås, Norway
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Zoppi S, Dondo A, Di Blasio A, Vitale N, Carfora V, Goria M, Chiavacci L, Giorgi I, D'Errico V, Irico L, Franco A, Battisti A. Livestock-Associated Methicillin-Resistant Staphylococcus aureus and Related Risk Factors in Holdings of Veal Calves in Northwest Italy. Microb Drug Resist 2021; 27:1136-1143. [PMID: 33570474 DOI: 10.1089/mdr.2020.0226] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Livestock-associated methicillin-resistant Staphylococcus aureus (LA-MRSA) have emerged worldwide as zoonotic pathogens. Data on LA-MRSA in veal calf production in Italy are lacking; the aim of this survey was to fill current knowledge gaps in its prevalence and characteristics. Between February 2012 and January 2013 nasal swabs were taken from 1650 three- to six-month-old veal calves on 55 farms in Piedmont (northwest Italy), including gathering-related epidemiological data. S. aureus were screened for methicillin resistance by phenotypic and molecular (mecA gene detection) methods. MRSA were further genotyped by multilocus sequence typing. About 30% of the herds tested positive for MRSA: three different clonal complexes (CC398, CC97, and CC1) and staphylococcal cassette chromosome mec types (IVa, IVb, and V) were detected. Multilevel logistic regression model indicated poor cleaning, importation from Austria, and animal age as risk factors and coagulase-negative staphylococci colonization as a predictive factor for the occurrence of MRSA. The detection of CCs circulating in pigs and dairy cattle in Italy underscores the ability of the LA-MRSA clones to spread among animal production systems. In addition to maintaining preventive control measures for human health, better cleaning procedures need to be implemented, especially after new calves have been introduced into the herd.
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Affiliation(s)
- Simona Zoppi
- Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, Torino, Italy
| | - Alessandro Dondo
- Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, Torino, Italy
| | - Alessia Di Blasio
- Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, Torino, Italy
| | - Nicoletta Vitale
- Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, Torino, Italy
| | - Virginia Carfora
- National Reference Laboratory for Antimicrobial Resistance, Department of General Diagnostics, Centro di Referenza Nazionale per l'Antibioticoresistenza, Istituto Zooprofilattico Sperimentale di Lazio e Toscana "M. Aleandri," Rome, Italy
| | - Maria Goria
- Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, Torino, Italy
| | - Laura Chiavacci
- Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, Torino, Italy
| | - Ilaria Giorgi
- Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, Torino, Italy
| | - Valeria D'Errico
- Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, Torino, Italy
| | - Lara Irico
- Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, Torino, Italy
| | - Alessia Franco
- National Reference Laboratory for Antimicrobial Resistance, Department of General Diagnostics, Centro di Referenza Nazionale per l'Antibioticoresistenza, Istituto Zooprofilattico Sperimentale di Lazio e Toscana "M. Aleandri," Rome, Italy
| | - Antonio Battisti
- National Reference Laboratory for Antimicrobial Resistance, Department of General Diagnostics, Centro di Referenza Nazionale per l'Antibioticoresistenza, Istituto Zooprofilattico Sperimentale di Lazio e Toscana "M. Aleandri," Rome, Italy
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16
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Chen C, Wu F. Livestock-associated methicillin-resistant Staphylococcus aureus (LA-MRSA) colonisation and infection among livestock workers and veterinarians: a systematic review and meta-analysis. Occup Environ Med 2020; 78:oemed-2020-106418. [PMID: 33097674 DOI: 10.1136/oemed-2020-106418] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 09/21/2020] [Accepted: 10/01/2020] [Indexed: 01/02/2023]
Abstract
OBJECTIVES Methicillin-resistant Staphylococcus aureus (MRSA) is an increasing public health concern worldwide. The objective of this study was to calculate a summary odds ratio (OR) of livestock-associated MRSA colonisation and infection in humans, and to determine specific risk factors in livestock production contributing to MRSA colonisation. METHODS We screened PubMed and Embase for studies published from 2005 to 2019 inclusive, reporting livestock-associated (LA)-MRSA colonisation and infection among livestock workers/veterinarians, their families, and community members not regularly exposed to livestock. The primary outcome of interest was the OR of LA-MRSA colonisation comparing exposed and control groups. Quality was assessed according to the Newcastle-Ottawa quality assessment scale. A meta-analysis using a random-effects model was conducted to calculate a pooled OR. The heterogeneity in the meta-analysis was assessed using the I² method, and publication bias was evaluated using funnel plots. RESULTS A total of 3490 studies were identified by the search, with 37 studies including 53 matched exposed-control groups and 14 038 participants eligible for the meta-analysis. The pooled OR for LA-MRSA among livestock workers and veterinarians is 9.80 (95% CI 6.89 to 13.95; p=0.000; I2 =73.4), with no significant publication bias (Egger's p=0.66). The OR for swine workers was highest at 15.41 (95% CI 9.24 to 25.69), followed by cattle workers (11.62, 95% CI 4.60 to 29.36), veterinarians (7.63, 95% CI 3.10 to 18.74), horse workers (7.45, 95% CI 2.39 to 23.25), livestock workers (5.86, 95% CI 1.14 to 30.16), poultry workers (5.70, 95% CI 1.70 19.11), and industrial slaughterhouse workers (4.69, 95% CI 1.10 to 20.0). CONCLUSIONS Livestock workers, particularly swine farmers, are at significantly higher risk for LA-MRSA colonisation and subsequent infection. These results support the need for preventive practices to reduce LA-MRSA risk among those who handle and treat livestock. TRIAL REGISTRATION NUMBER CRD42019120403.
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Affiliation(s)
- Chen Chen
- Food Science and Human Nutrition, Michigan State University, East Lansing, Michigan, USA
| | - Felicia Wu
- Food Science and Human Nutrition, Michigan State University, East Lansing, Michigan, USA
- Agricultural, Food, and Resource Economics, Michigan State University, East Lansing, MI, United States
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17
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Van Gompel L, Luiken REC, Hansen RB, Munk P, Bouwknegt M, Heres L, Greve GD, Scherpenisse P, Jongerius-Gortemaker BGM, Tersteeg-Zijderveld MHG, García-Cobos S, Dohmen W, Dorado-García A, Wagenaar JA, Urlings BAP, Aarestrup FM, Mevius DJ, Heederik DJJ, Schmitt H, Bossers A, Smit LAM. Description and determinants of the faecal resistome and microbiome of farmers and slaughterhouse workers: A metagenome-wide cross-sectional study. ENVIRONMENT INTERNATIONAL 2020; 143:105939. [PMID: 32679392 DOI: 10.1016/j.envint.2020.105939] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 06/29/2020] [Accepted: 06/30/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND By studying the entire human faecal resistome and associated microbiome, the diversity and abundance of faecal antimicrobial resistance genes (ARGs) can be comprehensively characterized. Prior culture-based studies have shown associations between occupational exposure to livestock and carriage of specific antimicrobial resistant bacteria. Using shotgun metagenomics, the present study investigated 194 faecal resistomes and bacteriomes from humans occupationally exposed to ARGs in livestock (i.e. pig and poultry farmers, employees and family members and pig slaughterhouse workers) and a control population (Lifelines cohort) in the Netherlands. In addition, we sought to identify determinants for the human resistome and bacteriome composition by applying a combination of multivariate (NMDS, PERMANOVA, SIMPER and DESeq2 analysis) and multivariable regression analysis techniques. RESULTS Pig slaughterhouse workers and pig farmers carried higher total ARG abundances in their stools compared to broiler farmers and control subjects. Tetracycline, β-lactam and macrolide resistance gene clusters dominated the resistome of all studied groups. No significant resistome alpha diversity differences were found among the four populations. However, the resistome beta diversity showed a separation of the mean resistome composition of pig and pork exposed workers from broiler farmers and controls, independent of their antimicrobial use. We demonstrated differences in resistome composition between slaughter line positions, pig versus poultry exposed workers, as well as differences between farmers and employees versus family members. In addition, we found a significant correlation between the bacteriome and resistome, and significant differences in the bacteriome composition between and within the studied subpopulations. Finally, an in-depth analysis of pig and poultry farms - of which also farm livestock resistomes were analysed - showed positive associations between the number of on-farm working hours and human faecal AMR loads. CONCLUSION We found that the total normalized faecal ARG carriage was larger in persons working in the Dutch pork production chain compared to poultry farmers and controls. Additionally, we showed significant differences in resistome and bacteriome composition of pig and pork exposed workers compared to a control group, as well as within-population (farms, slaughterhouse) compositional differences. The number of on-farm working hours and the farm type (pig or broiler) that persons live or work on are determinants for the human faecal resistome. Overall, our results may suggest direct or indirect livestock contact as a determinant for human ARG carriage. Future studies should further focus on the connection between the human and livestock resistome (i.e. transmission routes) to substantiate the evidence for livestock-associated resistome acquisition.
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Affiliation(s)
- Liese Van Gompel
- Institute for Risk Assessment Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 2, 3584 CM Utrecht, the Netherlands.
| | - Roosmarijn E C Luiken
- Institute for Risk Assessment Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 2, 3584 CM Utrecht, the Netherlands
| | - Rasmus B Hansen
- Intomics A/S, Lottenborgvej 26, 2800 Kongens Lyngby, Denmark
| | - Patrick Munk
- Section for Genomic Epidemiology, National Food Institute, Technical University of Denmark, Kemitorvet 204, 2800 Kongens Lyngby, Denmark
| | | | - Lourens Heres
- Vion Food Group, Boseind 15, 5281 RM Boxtel, the Netherlands
| | - Gerdit D Greve
- Institute for Risk Assessment Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 2, 3584 CM Utrecht, the Netherlands
| | - Peter Scherpenisse
- Institute for Risk Assessment Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 2, 3584 CM Utrecht, the Netherlands
| | - Betty G M Jongerius-Gortemaker
- Institute for Risk Assessment Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 2, 3584 CM Utrecht, the Netherlands
| | - Monique H G Tersteeg-Zijderveld
- Institute for Risk Assessment Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 2, 3584 CM Utrecht, the Netherlands
| | - Silvia García-Cobos
- University of Groningen, University Medical Center Groningen, Department of Medical Microbiology and Infection Prevention, 9713 GZ Groningen, the Netherlands
| | - Wietske Dohmen
- Institute for Risk Assessment Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 2, 3584 CM Utrecht, the Netherlands
| | - Alejandro Dorado-García
- Institute for Risk Assessment Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 2, 3584 CM Utrecht, the Netherlands
| | - Jaap A Wagenaar
- Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 1, 3584 CL Utrecht, the Netherlands; Wageningen Bioveterinary Research, Houtribweg 39, 8221 RA Lelystad, the Netherlands
| | | | - Frank M Aarestrup
- Section for Genomic Epidemiology, National Food Institute, Technical University of Denmark, Kemitorvet 204, 2800 Kongens Lyngby, Denmark
| | - Dik J Mevius
- Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 1, 3584 CL Utrecht, the Netherlands; Wageningen Bioveterinary Research, Houtribweg 39, 8221 RA Lelystad, the Netherlands
| | - Dick J J Heederik
- Institute for Risk Assessment Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 2, 3584 CM Utrecht, the Netherlands
| | - Heike Schmitt
- Institute for Risk Assessment Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 2, 3584 CM Utrecht, the Netherlands; Centre for Infectious Disease Control, National Institute for Public Health and the Environment, Antonie van Leeuwenhoeklaan 9, 3721MA Bilthoven, the Netherlands
| | - Alex Bossers
- Institute for Risk Assessment Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 2, 3584 CM Utrecht, the Netherlands; Wageningen Bioveterinary Research, Houtribweg 39, 8221 RA Lelystad, the Netherlands
| | - Lidwien A M Smit
- Institute for Risk Assessment Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 2, 3584 CM Utrecht, the Netherlands
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Acquisition Risk Factors of the SCC mec IX-Methicillin-Resistant Staphylococcus aureus in Swine Production Personnel in Chiang Mai and Lamphun Provinces, Thailand. Antibiotics (Basel) 2020; 9:antibiotics9100651. [PMID: 33003278 PMCID: PMC7601853 DOI: 10.3390/antibiotics9100651] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Revised: 09/24/2020] [Accepted: 09/27/2020] [Indexed: 01/26/2023] Open
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) harboring the type-IX staphylococcal cassette chromosome mec (SCCmec) has been found in pigs and humans in Northern Thailand. However, knowledge of the prevalence and acquisition risk factors of this MRSA strain among swine production personnel (SPP) are needed. The nasal swab samples and data were collected from 202 voluntary SPP and 31 swine farms in Chiang Mai and Lamphun Provinces, Thailand in 2017. MRSA were screened and identified using mannitol salt agar, biochemical and antimicrobial susceptibility testing, multiplex PCR, and the SCCmec typing. The prevalence of MRSA was 7.9% (16/202) and 19.3% (6/31) among SPP and swine farms. All isolates were multidrug-resistant, and 55 of 59 isolates (93%) contained the type-IX SCCmec element. Data analysis indicated that education, working time, contact frequency, working solely with swine production, and personal hygiene were significantly related to MRSA acquisition (p < 0.05). The multivariate analysis revealed that pig farming experience, working days, and showering were good predictors for MRSA carriage among SPP (area under the curve (AUC) = 0.84). The biosecurity protocols and tetracycline use were significantly associated with MRSA detection in pig farms (p < 0.05). Hence, the active surveillance of MRSA and further development of local/national intervention for MRSA control are essential.
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19
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Pirolo M, Visaggio D, Gioffrè A, Artuso I, Gherardi M, Pavia G, Samele P, Ciambrone L, Di Natale R, Spatari G, Casalinuovo F, Visca P. Unidirectional animal-to-human transmission of methicillin-resistant Staphylococcus aureus ST398 in pig farming; evidence from a surveillance study in southern Italy. Antimicrob Resist Infect Control 2019; 8:187. [PMID: 31832187 PMCID: PMC6873530 DOI: 10.1186/s13756-019-0650-z] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Accepted: 11/11/2019] [Indexed: 11/10/2022] Open
Abstract
Background Livestock-associated methicillin-resistant Staphylococcus aureus (MRSA) belonging to clonal complex 398 is recognized as an occupational hazard for workers employed in intensive animal husbandry, especially in the swine-breeding chain. In this study, we compared the prevalence and epidemiological type of MRSA isolates from swine and farm workers in a large area of southern Italy. Methods Between January and March 2018, 88 workers from 32 farms where we had previously performed a survey for MRSA colonization of farmed pigs, were sampled by nasal swabbing. A follow-up investigation was conducted on seven workers 1 year after primary screening. MRSA isolates were characterized by MLST, spa and SCCmec typing, and tested for susceptibility to 15 antimicrobials. Epidemiological correlations between human and swine MRSA isolates were supported by Rep-MP3 and RAPD PCR fingerprinting, and whole-genome sequencing. Results The overall colonization rate of MRSA in swine farm workers was 21.6%, being significantly higher in intensive farms and in workers with direct animal contact. All human MRSA isolates were multi-drug resistant, belonged to the ST398 livestock clade, and did not carry Panton-Valentine leukocidin and enterotoxin genes. Notably, 94.1% of human MRSA isolates belonged to the same epidemiological type as swine MRSA isolates from the corresponding farm. Persistent MRSA carriage was documented in some workers 1 year after primary sampling. Conclusions We report a high prevalence of MRSA among swine farm workers, with higher colonization rates associated with intensive breeding and animal exposure. Our findings suggest unidirectional animal-to-human transmission of LA-MRSA and denote the high zoonotic transmissibility of the ST398 livestock clade.
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Affiliation(s)
- Mattia Pirolo
- 1Department of Science, Roma Tre University, Viale G. Marconi 446, 00146 Rome, Italy
| | - Daniela Visaggio
- 1Department of Science, Roma Tre University, Viale G. Marconi 446, 00146 Rome, Italy
| | - Angela Gioffrè
- Department of Medicine, Epidemiology, Workplace and Environmental Hygiene, Lamezia Terme Research Centre, INAIL - National Institute for Insurance against Accidents at Work, Lamezia Terme, Italy
| | - Irene Artuso
- 1Department of Science, Roma Tre University, Viale G. Marconi 446, 00146 Rome, Italy
| | - Monica Gherardi
- 3Department of Medicine, Epidemiology, Workplace and Environmental Hygiene, Monte Porzio Catone Research Centre, INAIL - National Institute for Insurance against Accidents at Work, Rome, Italy
| | - Grazia Pavia
- 4Istituto Zooprofilattico Sperimentale del Mezzogiorno, Catanzaro, Italy
| | - Pasquale Samele
- Department of Medicine, Epidemiology, Workplace and Environmental Hygiene, Lamezia Terme Research Centre, INAIL - National Institute for Insurance against Accidents at Work, Lamezia Terme, Italy
| | - Lucia Ciambrone
- 4Istituto Zooprofilattico Sperimentale del Mezzogiorno, Catanzaro, Italy
| | - Rossella Di Natale
- 5Department of Biomedical Sciences, Dental, Morphological and Functional Investigations, University of Messina, Messina, Italy
| | - Giovanna Spatari
- 5Department of Biomedical Sciences, Dental, Morphological and Functional Investigations, University of Messina, Messina, Italy
| | | | - Paolo Visca
- 1Department of Science, Roma Tre University, Viale G. Marconi 446, 00146 Rome, Italy
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Prevalence of Livestock-Associated Methicillin-Resistant Staphylococcus Aureus (LA-MRSA) Among Farm and Slaughterhouse Workers in Italy. J Occup Environ Med 2019; 60:e416-e425. [PMID: 29933320 DOI: 10.1097/jom.0000000000001385] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
OBJECTIVE We measured the prevalence of livestock-associated methicillin-resistant Staphylococcus aureus (LA-MRSA) in swine livestock workers, examined LA-MRSA resistance profile, and associated carriage with the working activities. METHODS Information was collected on demographics and occupational history. Swabs were collected and tested for the isolation of S. aureus, examined for antimicrobial susceptibility, and all MRSA underwent ST398qPCR assay. RESULTS LA-MRSA was isolated in 7.3% of the 396 enrolled workers. LA-MRSA colonization was more likely in farmers than in slaughterhouse workers (Fisher exact P = 0.001). Carriage was associated with herd size, being less frequent in small/medium farms (odds ratio = 0.20; 95% confidence interval = 0.07 to 0.53), and with the number of working days per week (OR = 2.11; 95% confidence interval = 1.07 to 4.19). CONCLUSIONS LA-MRSA carriage is strongly animal-exposure related, and educational intervention informing about the risks related to the activity with livestock is needed.
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Mascaro V, Squillace L, Nobile CGA, Papadopoli R, Bosch T, Schouls LM, Casalinuovo F, Musarella R, Pavia M. Prevalence of methicillin-resistant Staphylococcus aureus (MRSA) carriage and pattern of antibiotic resistance among sheep farmers from Southern Italy. Infect Drug Resist 2019; 12:2561-2571. [PMID: 31692514 PMCID: PMC6708399 DOI: 10.2147/idr.s211629] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Accepted: 06/14/2019] [Indexed: 12/26/2022] Open
Abstract
PURPOSE We conducted a cross-sectional study to measure the prevalence of methicillin-resistant Staphylococcus aureus (MRSA) colonization, with a particular focus on livestock associated (LA)-MRSA in farmers working in contact with livestock (sheep) in one Italian region. Furthermore, we have assessed the antimicrobial resistance pattern of isolates and the association of carriage with specific characteristic of farms and working tasks. PATIENTS AND METHODS Demographic data, occupational history, and contact with animals information was collected. Nasal and oropharyngeal swabs were collected and all samples were tested for the isolation and identification of S. aureus. Isolates were examined for antimicrobial susceptibility and all MRSA strains underwent molecular analyses through multiple-locus variable number of tandem repeat analysis (MLVA). RESULTS A total of 115 sheep farms and 275 sheep farmers were enrolled. MRSA colonized workers were found in three farms; S. aureus was isolated in 97 workers (35.5%), whereas MRSA was isolated in 3 (1.1%) workers. All MRSA isolates were classified as multidrug resistant. Two of the MRSA isolates were resistant to quinupristin/dalfopristin (QDA), mupirocin, erythromycin, and tetracycline. Among methicillin-susceptible S. aureus (MSSA), 32 (34%) were resistant to tetracycline, 31 (33%) to erythromycin, 26 (27.6%) to QDA, and 22 (23.4%) to linezolid and clindamycin. One MRSA belonged to MLVA complex (MC) 001, found to colonize both humans and animals. CONCLUSION The picture of MRSA transmission among sheep farmers does not seem to be critical, although there is the need to improve adequate control measures to prevent and minimize any biological risk in sheep farms for both animal and human health. Specific monitoring/surveillance programs would help in better understanding the epidemiology of resistant strains.
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Affiliation(s)
- Valentina Mascaro
- Department of Health Sciences, University of Catanzaro “Magna Græcia”, Catanzaro, Italy
| | - Lorena Squillace
- Department of Health Sciences, University of Catanzaro “Magna Græcia”, Catanzaro, Italy
| | - Carmelo GA Nobile
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Cosenza, Italy
| | - Rosa Papadopoli
- Department of Health Sciences, University of Catanzaro “Magna Græcia”, Catanzaro, Italy
| | - Thijs Bosch
- Centre for Infectious Disease Control, National Institute for Public Health and the Environment, Bilthoven, The Netherlands
| | - Leo M Schouls
- Centre for Infectious Disease Control, National Institute for Public Health and the Environment, Bilthoven, The Netherlands
| | - Francesco Casalinuovo
- Section of Catanzaro, Institute for Experimental Veterinary Medicine of Southern Italy, Catanzaro, Italy
| | - Rosanna Musarella
- Section of Catanzaro, Institute for Experimental Veterinary Medicine of Southern Italy, Catanzaro, Italy
| | - Maria Pavia
- Department of Health Sciences, University of Catanzaro “Magna Græcia”, Catanzaro, Italy
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Verkola M, Pietola E, Järvinen A, Lindqvist K, Kinnunen PM, Heikinheimo A. Low prevalence of zoonotic multidrug-resistant bacteria in veterinarians in a country with prudent use of antimicrobials in animals. Zoonoses Public Health 2019; 66:667-678. [PMID: 31232511 DOI: 10.1111/zph.12619] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 05/28/2019] [Accepted: 06/05/2019] [Indexed: 12/20/2022]
Abstract
The occurrence of multidrug-resistant zoonotic bacteria in animals has been increasing worldwide. Working in close contact with livestock increases the risk of carriage of these bacteria. We investigated the occurrence of extended-spectrum beta-lactamase (ESBL) and plasmidic AmpC beta-lactamase producing Enterobacteriaceae (ESBL/pAmpC-PE) and livestock-associated methicillin-resistant Staphylococcus aureus (LA-MRSA) in Finnish veterinarians (n = 320). In addition to microbiological samples, background information was collected. Bacterial whole genome sequencing was performed to deduce sequence types (STs), spa types and resistance genes of the isolates. In total, 3.0% (9/297) of the veterinarians carried ESBL producing Escherichia coli, with one ESBL producing E. coli isolate producing also AmpC. Seven different STs, sequences of several different plasmid groups as well as several different blaESBL/pAmpC genes existed in different combinations. No carbapenemase or colistin resistance genes were detected. MRSA was detected in 0.3% (1/320) of the samples. The strain belonged to LA-MRSA clonal complex (CC) 398 (ST398, spa type 011, lacking Panton-Valentine leukocidin genes). In conclusion, this study shows low carriage of multidrug-resistant zoonotic bacteria in Finnish veterinarians. However, finding LA-MRSA for the first time in a sample from a veterinarian in a country with prudent use of animal antimicrobials and regarding the recent rise of LA-MRSA on Finnish pig farms, a strong recommendation to protect people working in close contact with animals carrying LA-MRSA CC398 is given. Further studies are needed to explain why the prevalence of LA-MRSA in veterinarians is lower in Finland than in other European countries.
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Affiliation(s)
- Marie Verkola
- Elintarvikehygienian ja ympäristöterveyden osasto, Eläinlääketieteellinen tiedekunta, Helsingin yliopisto, Helsinki, Finland
| | - Eeva Pietola
- Elintarvikehygienian ja ympäristöterveyden osasto, Eläinlääketieteellinen tiedekunta, Helsingin yliopisto, Helsinki, Finland
| | - Asko Järvinen
- Infektiosairauksien linja, Tulehduskeskus, Helsingin yliopistollinen keskussairaala ja Helsingin yliopisto, Helsinki, Finland
| | - Kristian Lindqvist
- Yliopistopalvelut, Lähipalvelutiimi Viikki, Helsingin yliopisto, Helsinki, Finland
| | - Paula M Kinnunen
- Eläinlääketieteellisten biotieteiden osasto, Eläinlääketieteellinen tiedekunta, Helsingin yliopisto, Helsinki, Finland.,Ruokavirasto, Helsinki, Finland
| | - Annamari Heikinheimo
- Elintarvikehygienian ja ympäristöterveyden osasto, Eläinlääketieteellinen tiedekunta, Helsingin yliopisto, Helsinki, Finland.,Ruokavirasto, Helsinki, Finland
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Franceschini G, Bottino M, Millet I, Martello E, Zaltron F, Favretto AR, Vonesch N, Tomao P, Mannelli A. Assessment of the Exposure of Turkey Farmers to Antimicrobial Resistance Associated with Working Practices. Vet Sci 2019; 6:E13. [PMID: 30717204 PMCID: PMC6466403 DOI: 10.3390/vetsci6010013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Revised: 01/24/2019] [Accepted: 01/29/2019] [Indexed: 11/17/2022] Open
Abstract
The objective of the present study was the identification of farming practices in the production of turkeys for human consumption, and their ranking in terms of the occupational probability of exposure to antimicrobial resistant (AMR) bacteria, for farm workers. We gathered evidence and data from scientific literature, on risk factors for AMR in farmers, and on the prevalence of those hazards across farming phases. We administered semi-structured interviews to public and private veterinarians in Northern Italy, to obtain detailed information on turkey farming phases, and on working practices. Data were then integrated into a semi-quantitative Failure Modes and Effect Analysis (FMEA). Those working practices, which are characterized by direct contact with numerous animals, and which are carried out frequently, with rare use of personal protection devices resulted as associated with the greatest probability of exposure to AMR. For methicillin resistant Staphylococcus aureus (MRSA), these included vaccination and administration of any individual therapy, and removal and milling of litter, given the exposure of farmers to high dust level. Indeed, levels of occupational exposure to MRSA are enhanced by its transmission routes, which include direct contact with animal, as well as airborne transmission. Level of exposure to extended spectrum beta lactamase (ESBL) is more strictly associated with direct contact and the oral-fecal route. Consequently, exposure to ESBL resulted and associated with the routinely tipping over of poults turned on their back, and with the individual administration of therapies.
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Affiliation(s)
| | - Marta Bottino
- Department of Veterinary Sciences, University of Turin, 10124 Turin, Italy.
| | - Ilary Millet
- Department of Veterinary Sciences, University of Turin, 10124 Turin, Italy.
| | - Elisa Martello
- Department of Veterinary Sciences, University of Turin, 10124 Turin, Italy.
| | - Francesca Zaltron
- Department of Law and Political, Economic and Social Sciences, University of Eastern Piedmont, 15121 Alessandria, Italy.
| | - Anna Rosa Favretto
- Department of Law and Political, Economic and Social Sciences, University of Eastern Piedmont, 15121 Alessandria, Italy.
| | - Nicoletta Vonesch
- Department of Medicine, Epidemiology, Occupational Hygiene and the Environment, National Institute for Insurance against Accidents at Work (INAIL), 00078 Monte Porzio Catone (Rome), Italy.
| | - Paola Tomao
- Department of Medicine, Epidemiology, Occupational Hygiene and the Environment, National Institute for Insurance against Accidents at Work (INAIL), 00078 Monte Porzio Catone (Rome), Italy.
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Nadimpalli ML, Stewart JR, Pierce E, Pisanic N, Love DC, Hall D, Larsen J, Carroll KC, Tekle T, Perl TM, Heaney CD. Face Mask Use and Persistence of Livestock-associated Staphylococcus aureus Nasal Carriage among Industrial Hog Operation Workers and Household Contacts, USA. ENVIRONMENTAL HEALTH PERSPECTIVES 2018; 126:127005. [PMID: 30675826 PMCID: PMC6371678 DOI: 10.1289/ehp3453] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 11/16/2018] [Accepted: 11/17/2018] [Indexed: 05/27/2023]
Abstract
BACKGROUND Industrial hog operation (IHO) workers may persistently carry antibiotic-resistant, livestock-associated Staphylococcus aureus in their nasal cavities. It is unclear whether IHO work activities can alter IHO workers' and their household members' exposure to these bacteria. OBJECTIVE Our objective was to investigate the relationship of IHO work activities with persistence of antibiotic-resistant, livestock-associated S. aureus nasal carriage among IHO workers and their household members. METHODS At biweekly intervals over 4 months, IHO workers and their household members completed questionnaires and provided nasal swabs that were assessed for S. aureus, multidrug-resistant S. aureus (MDRSA), and livestock-associated markers (tetracycline resistance, scn absence, spa type). We examined the association between transient and habitual IHO work activities and S. aureus nasal carriage outcomes. RESULTS One hundred one IHO workers and 79 household members completed 1,456 study visits. Face mask use (each 25% increase) was associated with reduced odds of nasal carriage of MDRSA (odds ratio [OR]: 0.65 [95% confidence interval (CI): 0.46, 0.92], tetracycline-resistant S. aureus [OR = 0.74 (95% CI: 0.56, 0.97)], and S. aureus clonal complex (CC) 398/CC9 [OR = 0.77 (95% CI: 0.60, 0.99)]. IHO workers who ever (vs. never) gave pigs injections had higher odds of these outcomes. Among household members, living with an IHO worker who consistently ([Formula: see text] of the time) versus sometimes or never used a face mask was associated with reduced odds of carrying scn-negative S. aureus, tetracycline-resistant S. aureus, and S. aureus CC398/CC9 (OR range: 0.12-0.20, all [Formula: see text]), and consistent IHO worker coveralls use was associated with reduced odds of household member MDRSA carriage only. Living with an IHO worker who habitually had contact with [Formula: see text] hogs (vs. [Formula: see text]) was associated with higher odds of household member livestock-associated S. aureus carriage. CONCLUSIONS Consistent face mask use was associated with reduced exposure to antibiotic-resistant, livestock-associated S. aureus among IHO workers and their household members. https://doi.org/10.1289/EHP3453.
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Affiliation(s)
- Maya L Nadimpalli
- Department of Environmental Sciences and Engineering, UNC Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Jill R Stewart
- Department of Environmental Sciences and Engineering, UNC Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Elizabeth Pierce
- Department of Environmental Sciences and Engineering, UNC Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Nora Pisanic
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - David C Love
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
- Johns Hopkins Center for a Livable Future, Johns Hopkins University, Baltimore, Maryland, USA
| | - Devon Hall
- Rural Empowerment Association for Community Help, Warsaw, North Carolina, USA
| | - Jesper Larsen
- Department of Bacteria, Parasites and Fungi, Statens Serum Institut, Copenhagen, Denmark
| | - Karen C Carroll
- Division of Medical Microbiology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
- Microbiology Laboratory, Johns Hopkins Hospital, Baltimore, Maryland, USA
| | - Tsigereda Tekle
- Microbiology Laboratory, Johns Hopkins Hospital, Baltimore, Maryland, USA
| | - Trish M Perl
- Division of Infectious Diseases, Department of Medicine, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Christopher D Heaney
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
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25
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Davis MF, Pisanic N, Rhodes SM, Brown A, Keller H, Nadimpalli M, Christ A, Ludwig S, Ordak C, Spicer K, Love DC, Larsen J, Wright A, Blacklin S, Flowers B, Stewart J, Sexton KG, Rule AM, Heaney CD. Occurrence of Staphylococcus aureus in swine and swine workplace environments on industrial and antibiotic-free hog operations in North Carolina, USA: A One Health pilot study. ENVIRONMENTAL RESEARCH 2018; 163:88-96. [PMID: 29428885 PMCID: PMC6292733 DOI: 10.1016/j.envres.2017.12.010] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Revised: 11/27/2017] [Accepted: 12/12/2017] [Indexed: 05/06/2023]
Abstract
Occupational exposure to swine has been associated with increased Staphylococcus aureus carriage, including antimicrobial-resistant strains, and increased risk of infections. To characterize animal and environmental routes of worker exposure, we optimized methods to identify S. aureus on operations that raise swine in confinement with antibiotics (industrial hog operation: IHO) versus on pasture without antibiotics (antibiotic-free hog operation: AFHO). We associated findings from tested swine and environmental samples with those from personal inhalable air samplers on worker surrogates at one IHO and three AFHOs in North Carolina using a new One Health approach. We determined swine S. aureus carriage status by collecting swab samples from multiple anatomical sites, and we determined environmental positivity for airborne bioaerosols with inhalable and impinger samplers and a single-stage impactor (ambient air) cross-sectionally. All samples were analyzed for S. aureus, and isolates were tested for antimicrobial susceptibility, absence of scn (livestock marker), and spa type. Seventeen of twenty (85%) swine sampled at the one IHO carried S. aureus at >1 anatomical sites compared to none of 30 (0%) swine sampled at the three AFHOs. All S. aureus isolates recovered from IHO swine and air samples were scn negative and spa type t337; almost all isolates (62/63) were multidrug resistant. S. aureus was recovered from eight of 14 (67%) ambient air and two (100%) worker surrogate personal air samples at the one IHO, whereas no S. aureus isolates were recovered from 19 ambient and six personal air samples at the three AFHOs. Personal worker surrogate inhalable sample findings were consistent with both swine and ambient air data, indicating the potential for workplace exposure. IHO swine and the one IHO environment could be a source of potential pathogen exposure to workers, as supported by the detection of multidrug-resistant S. aureus (MDRSA) with livestock-associated spa type t337 among swine, worker surrogate personal air samplers and environmental air samples at the one IHO but none of the three AFHOs sampled in this study. Concurrent sampling of swine, personal swine worker surrogate air, and ambient airborne dust demonstrated that IHO workers may be exposed through both direct (animal contact) and indirect (airborne) routes of transmission. Investigation of the effectiveness of contact and respiratory protections is warranted to prevent IHO worker exposure to multidrug-resistant livestock-associated S. aureus and other pathogens.
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Affiliation(s)
- Meghan F Davis
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA; Department of Molecular and Comparative Pathobiology, Johns Hopkins School of Medicine, Baltimore, Maryland, USA.
| | - Nora Pisanic
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Sarah M Rhodes
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, NC, USA
| | - Alexis Brown
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Haley Keller
- North Carolina State University, Raleigh, NC, USA
| | - Maya Nadimpalli
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, NC, USA
| | - Andrea Christ
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Shanna Ludwig
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Carly Ordak
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Kristoffer Spicer
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - David C Love
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA; Johns Hopkins Center for a Livable Future, Baltimore, Maryland, USA
| | - Jesper Larsen
- Department of Bacteria, Parasites and Fungi, Statens Serum Institut, Copenhagen, Denmark
| | - Asher Wright
- NC Choices, North Carolina State University Cooperative Extension and NC A&T State University, NC, USA
| | - Sarah Blacklin
- NC Choices, North Carolina State University Cooperative Extension and NC A&T State University, NC, USA
| | | | - Jill Stewart
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, NC, USA
| | - Kenneth G Sexton
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, NC, USA
| | - Ana M Rule
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Christopher D Heaney
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA; Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA; Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA.
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Strommenger B, Layer F, Werner G. Staphylococcus aureus and Methicillin-Resistant Staphylococcus aureus in Workers in the Food Industry. STAPHYLOCOCCUS AUREUS 2018. [PMCID: PMC7150186 DOI: 10.1016/b978-0-12-809671-0.00009-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Staphylococcus aureus is part of the common flora on the skin and mucous membranes of mammals and approximately 20–30% of humans are persistently colonized, mainly by mostly susceptible human-adapted isolates. In contrast, colonization with methicillin-resistant S. aureus is rare (approximately 1%), predominantly transient and associated with prior contact to the health care system. Additionally, in recent years livestock-associated S. aureus clones contributed to colonization in humans, especially in those working in close contact to farm animals. A considerable percentage of colonizing S. aureus isolates is equipped with enterotoxin genes. Humans carrying enterotoxigenic isolates represent a contamination source when handling food, thus generating a continuous risk of S. aureus food intoxication. Molecular characterization of isolates colonizing humans and obtained from food, respectively, enables the tracing of food-related outbreaks back to the source of food intoxication. We will summarize current knowledge about the S. aureus population colonizing humans, including those in close contact to animals and food, respectively. Additionally, we will review data on the molecular characterization of S. aureus isolates related to staphylococcal foodborne disease and the elucidation of staphylococcal foodborne outbreaks. Staphylococcal food poisoning is a common foodborne disease, mediated by the ingestion of enterotoxins produced by enterotoxigenic strains of S. aureus. For several outbreaks of foodborne S. aureus disease, colonized personnel could be identified as the source of food contamination. However, because of the widespread occurrence of enterotoxigenic strains as human colonizers and the often transient nature of colonization, the source of contamination cannot always be identified unambiguously. Therefore, compliance with hygiene measures is the most important requirement to prevent food contamination by both human colonization and environmental S. aureus reservoirs.
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Beresin GA, Wright JM, Rice GE, Jagai JS. Swine exposure and methicillin-resistant Staphylococcus aureus infection among hospitalized patients with skin and soft tissue infections in Illinois: A ZIP code-level analysis. ENVIRONMENTAL RESEARCH 2017; 159:46-60. [PMID: 28772149 PMCID: PMC5862075 DOI: 10.1016/j.envres.2017.07.037] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Revised: 07/14/2017] [Accepted: 07/18/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND Methicillin-resistant Staphylococcus aureus (MRSA), a bacterial pathogen, is a predominant cause of skin and soft tissue infections (SSTI) in the United States. Swine-production facilities have been recognized as potential environmental reservoirs of MRSA. To better understand how swine production may contribute to MRSA infection, we evaluated the association between MRSA infection among SSTI inpatients and exposure measures derived from national swine inventory data. METHODS Based on adjusted odds ratios from logistic regression models, we evaluated the association between swine exposure metrics and MRSA infections among all Illinois inpatient hospitalizations for SSTI from January 2008 through July 2011. We also assessed if swine exposures had greater association with suspected community-onset MRSA (CO-MRSA) compared to suspected hospital-onset MRSA (HO-MRSA). Exposures were estimated using the Farm Location and Agricultural Production Simulator, generating the number of farms with greater than 1000 swine per residential ZIP code and the residential ZIP code-level swine density (swine/km2). RESULTS For every increase in 100 swine/km2 within a residential ZIP code, the adjusted OR (aOR) for MRSA infection was 1.36 (95% CI: 1.28-1.45). For every additional large farm (i.e., >1000 swine) per ZIP code, the aOR for MRSA infection was 1.06 (95% CI: 1.04-1.07). The aOR for ZIP codes with any large farms compared to those with no large farms was 1.24 (95% CI: 1.19-1.29). We saw no evidence of an increased association for CO-MRSA compared to HO-MRSA with either continuous exposure metric (aORs=0.99), and observed inconsistent results across exposure categories. CONCLUSIONS These publicly-available, ecological exposure data demonstrated positive associations between swine exposure measures and individual-level MRSA infections among SSTI inpatients. Though it is difficult to draw definitive conclusions due to limitations of the data, these findings suggest that the risk of MRSA may increase based on indirect environmental exposure to swine production. Future research can address measurement error related to these data by improving exposure assessment precision, increased specification of MRSA strain, and better characterization of specific environmental exposure pathways.
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Affiliation(s)
- Glennon A Beresin
- Association of Schools and Programs of Public Health Environmental Health Fellowship hosted by Environmental Protection Agency: 1900 M Street NW, Suite 710, Washington, DC 20036, United States.
| | - J Michael Wright
- US Environmental Protection Agency, National Center for Environmental Assessment, 26 West Martin Luther King Dr., Cincinnati, OH 45268, United States
| | - Glenn E Rice
- US Environmental Protection Agency, National Center for Environmental Assessment, 26 West Martin Luther King Dr., Cincinnati, OH 45268, United States
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Sun J, Yang M, Sreevatsan S, Bender JB, Singer RS, Knutson TP, Marthaler DG, Davies PR. Longitudinal study of Staphylococcus aureus colonization and infection in a cohort of swine veterinarians in the United States. BMC Infect Dis 2017; 17:690. [PMID: 29052523 PMCID: PMC5649086 DOI: 10.1186/s12879-017-2802-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Accepted: 10/04/2017] [Indexed: 12/04/2022] Open
Abstract
Background People working with pigs are at elevated risk of harboring methicillin resistant S. aureus (MRSA) in their nose, which is attributable to occupational exposure to animals harboring livestock adapted S. aureus. To obtain insight into the biological nature of occupationally related nasal culture positivity, we conducted a longitudinal study of 66 swine veterinarians in the USA. Methods The study cohort resided in 15 US states and worked predominantly with swine. Monthly for 18 months, participants self-collected nasal swabs and completed a survey to report recent exposure to pigs and other animals; the occurrence of work related injuries; and any relevant health events such as skin and soft tissue infections or confirmed staphylococcal infections. Nasal swabs were cultured using selective methods to determine the presence of MRSA and methicillin susceptible S. aureus (MSSA), and isolates were characterized by spa typing and MLST. Results Prevalences of S. aureus (64%, monthly range from 58 to 82%) and MRSA (9.5%; monthly range from 6 to15%) were higher than reported for the US population (30% and 1.5% respectively). Predominant spa types were t034 (ST398, 37%), t002 (ST5, 17%) and t337 (ST9/ST398 13%), a distribution similar to that found in a concurrent study in pigs in the USA. Veterinarians were classified into three groups: Persistent carriers (PC, 52%), Intermittent carriers (IC, 47%) and Non-carriers (NC, 1%). Persistent carriage of a single spa type was observed in 14 (21%) of participants, and paired (first and last) isolates from PC subjects had minor genetic differences. Swabs from PC veterinarians carried higher numbers of S. aureus. Among IC veterinarians, culture positivity was significantly associated with recent contact with pigs. Conclusions Exposure to pigs did not lead to prolonged colonization in most subjects, and the higher numbers of S. aureus in PC subjects suggests that unknown host factors may determine the likelihood of prolonged colonization by S. aureus of livestock origin. Exposure to S. aureus and persistent colonization of swine veterinarians was common but rarely associated with S. aureus disease. Electronic supplementary material The online version of this article (10.1186/s12879-017-2802-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Jisun Sun
- Department of Veterinary Population Medicine, University of Minnesota, 385 ASVM, 1988 Fitch Ave, St. Paul, MN, 55108, USA
| | - My Yang
- Department of Veterinary Population Medicine, University of Minnesota, 385 ASVM, 1988 Fitch Ave, St. Paul, MN, 55108, USA
| | - Srinand Sreevatsan
- Department of Veterinary Population Medicine, University of Minnesota, 385 ASVM, 1988 Fitch Ave, St. Paul, MN, 55108, USA
| | - Jeffrey B Bender
- Department of Veterinary Population Medicine, University of Minnesota, 385 ASVM, 1988 Fitch Ave, St. Paul, MN, 55108, USA
| | - Randall S Singer
- Department of Veterinary and Biomedical Sciences, University of Minnesota, St. Paul, MN, 55108, USA
| | - Todd P Knutson
- Department of Veterinary Population Medicine, University of Minnesota, 385 ASVM, 1988 Fitch Ave, St. Paul, MN, 55108, USA
| | - Douglas G Marthaler
- Department of Veterinary Population Medicine, University of Minnesota, 385 ASVM, 1988 Fitch Ave, St. Paul, MN, 55108, USA
| | - Peter R Davies
- Department of Veterinary Population Medicine, University of Minnesota, 385 ASVM, 1988 Fitch Ave, St. Paul, MN, 55108, USA.
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Zomer TP, Wielders CCH, Veenman C, Hengeveld P, van der Hoek W, de Greeff SC, Smit LAM, Heederik DJ, Yzermans CJ, Bosch T, Maassen CBM, van Duijkeren E. MRSA in persons not living or working on a farm in a livestock-dense area: prevalence and risk factors. J Antimicrob Chemother 2017; 72:893-899. [PMID: 27999031 DOI: 10.1093/jac/dkw483] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Accepted: 10/09/2016] [Indexed: 12/27/2022] Open
Abstract
Objectives MRSA emerged in livestock and persons in contact with livestock is referred to as livestock-associated MRSA (LA-MRSA). We assessed the prevalence and risk factors for MRSA carriage in persons not living or working on a farm. Methods A cross-sectional study was performed among 2492 adults living in close proximity of livestock farms. Persons working and/or living on farms were excluded. Nasal swabs were cultured using selective media. Participants completed questionnaires and the distance from the residential address to the nearest farm was calculated. The Mann-Whitney U -test was used to compare median distances. Risk factors were explored with logistic regression. Results Fourteen persons carried MRSA (0.56%; 95% CI 0.32%-0.92%), 10 of which carried LA-MRSA of multiple-locus variable-number tandem repeat analysis complex (MC) 398 (0.40%; 95% CI 0.20%-0.71%). MRSA MC 398 carriers lived significantly closer to the nearest farm than non-carriers (median: 184 versus 402 m; P < 0.01). In bivariate analyses correcting for contact with livestock, this difference remained significant. Conclusions Although the prevalence was low, living near farms increased the risk of MRSA MC 398 carriage for persons not living or working on a farm. Further research is necessary to identify the transmission routes.
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Affiliation(s)
- Tizza P Zomer
- Centre for Infectious Disease Control (CIb), National Institute for Public Health and the Environment (RIVM), Bilthoven, BA 3720, The Netherlands
| | - Cornelia C H Wielders
- Centre for Infectious Disease Control (CIb), National Institute for Public Health and the Environment (RIVM), Bilthoven, BA 3720, The Netherlands
| | - Christiaan Veenman
- Centre for Infectious Disease Control (CIb), National Institute for Public Health and the Environment (RIVM), Bilthoven, BA 3720, The Netherlands
| | - Paul Hengeveld
- Centre for Infectious Disease Control (CIb), National Institute for Public Health and the Environment (RIVM), Bilthoven, BA 3720, The Netherlands
| | - Wim van der Hoek
- Centre for Infectious Disease Control (CIb), National Institute for Public Health and the Environment (RIVM), Bilthoven, BA 3720, The Netherlands
| | - Sabine C de Greeff
- Centre for Infectious Disease Control (CIb), National Institute for Public Health and the Environment (RIVM), Bilthoven, BA 3720, The Netherlands
| | - Lidwien A M Smit
- Division of Environmental Epidemiology, Institute for Risk Assessment Sciences (IRAS), Utrecht University, Utrecht, TD 3508, The Netherlands
| | - Dick J Heederik
- Division of Environmental Epidemiology, Institute for Risk Assessment Sciences (IRAS), Utrecht University, Utrecht, TD 3508, The Netherlands
| | - C Joris Yzermans
- Netherlands Institute for Health Services Research (NIVEL), Utrecht, BN 3500, The Netherlands
| | - Thijs Bosch
- Centre for Infectious Disease Control (CIb), National Institute for Public Health and the Environment (RIVM), Bilthoven, BA 3720, The Netherlands
| | - Catharina B M Maassen
- Centre for Infectious Disease Control (CIb), National Institute for Public Health and the Environment (RIVM), Bilthoven, BA 3720, The Netherlands
| | - Engeline van Duijkeren
- Centre for Infectious Disease Control (CIb), National Institute for Public Health and the Environment (RIVM), Bilthoven, BA 3720, The Netherlands
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30
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Ivbule M, Miklaševičs E, Čupāne L, Bērziņa L, Bāliņš A, Valdovska A. MRSA in Pig Population. Pol J Microbiol 2017; 66:383-392. [PMID: 29319526 DOI: 10.5604/01.3001.0010.4876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Methicillin resistant Staphylococcus aureus (MRSA) is widespread worldwide in different types of animal species and as a zoonosis takes a great risk for human health not only as a food toxicoinfection, but also as a highly resistant pathogen causing serious soft tissue infectious, septicaemia and even death. One of the most affected food-producing animal species is swine in the production of which new antibiotics in big amounts are used more and more continuously, increasing antimicrobial resistance. In this study several commercial pig farms and pigs with different age groups as well as farm workers and samples from environment were examined with the purpose of detecting MRSA prevalence and evaluating antimicrobial resistance. A total of 85 isolated MRSA strains were characterised by conventional microbial and molecular methods. MRSA was found in all farms. MRSA prevalence in different pig age groups and farms varied from none to 79.2% reaching higher values among 3-3.5 (26.6%) and 4-4.5 (31.9%) old pigs. The 98.7% of 74 further investigated MRSA isolates were resistant to penicillin, 94.9% to tetracycline, 45.6% to cephalexin and 10 different spa types were found among which spa type t011 was the most widespread. To the best of our knowledge, this is the first time MRSA was researched in sow milk and the first description of the presence of MRSA in several age groups of pigs in Latvia.
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Affiliation(s)
- Meldra Ivbule
- Food and Veterinary Service, Veterinary Surveillance Department, Riga, Latvia
| | | | - Liene Čupāne
- Riga Stradins University, Institute of Oncology, Riga, Latvia
| | - Laima Bērziņa
- Latvia University of Agriculture, Faculty of Information Technology, Jelgava, Latvia
| | - Andris Bāliņš
- Latvia University of Agriculture, Scientific Laboratory of Molecular Biology and Microbiology, Jelgava, Latvia
| | - Anda Valdovska
- Latvia University of Agriculture Faculty of Veterinary Medicine, Jelgava, Latvia
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31
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Sahibzada S, Abraham S, Coombs GW, Pang S, Hernández-Jover M, Jordan D, Heller J. Transmission of highly virulent community-associated MRSA ST93 and livestock-associated MRSA ST398 between humans and pigs in Australia. Sci Rep 2017; 7:5273. [PMID: 28706213 PMCID: PMC5509732 DOI: 10.1038/s41598-017-04789-0] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Accepted: 05/19/2017] [Indexed: 12/13/2022] Open
Abstract
Pigs have been recognised as a reservoir of livestock associated methicillin-resistant Staphylococcus aureus (LA-MRSA) in Europe, Asia and North America. However, little is known about the presence and distribution of MRSA in the Australian pig population and pig industry. This study describes the presence, distribution and molecular characteristics of the human adapted Australian CA-MRSA ST93 isolated from pigs, people, and the environment within a piggery. Isolates were subjected to antibiotic susceptibility testing, DNA microarray, whole genome sequencing, multi locus sequence typing, virulence and resistance gene characterization and phylogenetic analysis. MRSA were isolated from 60% (n = 52) of farm workers where 84% of isolates returned ST93 and the rest ST398. Of the thirty-one pig isolates tested further, an equal number of ST398 and ST93 (15 each) and one as ST30-V were identified. Four of six environmental isolates were identified as ST93 and two as ST398. This study has identified for the first time in Australia the occurrence of CA-MRSA ST93 and LA-MRSA ST398 amongst farm workers, pigs, and the farm environment. Comparative genome analysis indicates that ST398 is likely to have been introduced into Australia from Europe or North America. This study also reports the first linezolid resistant MRSA isolated in Australia.
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Affiliation(s)
- S Sahibzada
- School of Animal and Veterinary Sciences, Charles Sturt University, Wagga Wagga, NSW 2678, Australia
- Graham Centre for Agricultural Innovation, Wagga Wagga, Australia
| | - S Abraham
- School of Veterinary and Life Sciences, Murdoch University, Murdoch, Australia
| | - G W Coombs
- School of Veterinary and Life Sciences, Murdoch University, Murdoch, Australia
- PathWest Laboratory Medicine - WA, Fiona Stanley Hospital, Murdoch, Australia
| | - S Pang
- School of Veterinary and Life Sciences, Murdoch University, Murdoch, Australia
- PathWest Laboratory Medicine - WA, Fiona Stanley Hospital, Murdoch, Australia
| | - M Hernández-Jover
- School of Animal and Veterinary Sciences, Charles Sturt University, Wagga Wagga, NSW 2678, Australia
- Graham Centre for Agricultural Innovation, Wagga Wagga, Australia
| | - D Jordan
- Department of Primary Industries, Wollongbar, NSW 2478, Australia
| | - J Heller
- School of Animal and Veterinary Sciences, Charles Sturt University, Wagga Wagga, NSW 2678, Australia.
- Graham Centre for Agricultural Innovation, Wagga Wagga, Australia.
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32
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Verstappen KM, Willems E, Fluit AC, Duim B, Martens M, Wagenaar JA. Staphylococcus aureus Nasal Colonization Differs among Pig Lineages and Is Associated with the Presence of Other Staphylococcal Species. Front Vet Sci 2017; 4:97. [PMID: 28691012 PMCID: PMC5481302 DOI: 10.3389/fvets.2017.00097] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Accepted: 06/08/2017] [Indexed: 12/03/2022] Open
Abstract
Staphylococcus aureus is a common colonizer in pigs, with methicillin-resistant S. aureus (MRSA) in particular being a potential health risk to humans. To reduce the exposure to humans, the colonization in pigs should be reduced. The aim of this study was to quantitatively compare the susceptibility of pig lineages for S. aureus colonization, and if the absence of S. aureus could be associated with the presence or absence of other staphylococcal species. Nasal samples (n = 129) were obtained from seven different pig lineages in the Netherlands, France, and Germany. S. aureus and other staphylococci were enumerated from these samples by real-time (RT)-PCR and culture. Associations were explored between the presence of S. aureus and other staphylococci. S. aureus was detected by RT-PCR on all farms and in samples from pigs of all lineages. Twenty-five percent of the pigs from lineage F (from two farms) were colonized with S. aureus, while in all other lineages it was more than 50% (p < 0.01). Moreover, in S. aureus-positive samples from pigs of lineage F smaller amounts of S. aureus were found than in other lineages. Staphylococcus sciuri, Staphylococcus cohnii, and Staphylococcus saprophyticus were usually not found in combination with S. aureus in these samples. In conclusion: (i) pigs from different genetic lineages have different susceptibilities for colonization with S. aureus. These pigs might contain a genetic factor influencing nasal colonization. (ii) Colonization of S. aureus is also associated with the absence of S. sciuri, S. cohnii, or S. saprophyticus. (iii) The farm environment seems to influence the presence of S. aureus in pigs.
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Affiliation(s)
- Koen M Verstappen
- Faculty of Veterinary Medicine, Department of Infectious Diseases and Immunology, Utrecht University, Utrecht, Netherlands
| | | | - Ad C Fluit
- Department of Medical Microbiology, University Medical Centre Utrecht, Utrecht, Netherlands
| | - Birgitta Duim
- Faculty of Veterinary Medicine, Department of Infectious Diseases and Immunology, Utrecht University, Utrecht, Netherlands
| | | | - Jaap A Wagenaar
- Faculty of Veterinary Medicine, Department of Infectious Diseases and Immunology, Utrecht University, Utrecht, Netherlands.,Wageningen Bioveterinary Research, Lelystad, Netherlands
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Azeem MI, Tashani M, Badahdah AM, Heron L, Pedersen K, Jeoffreys N, Kok J, Haworth E, Dwyer DE, Hill-Cawthorne G, Rashid H, Booy R. Surveillance of Australian Hajj pilgrims for carriage of potentially pathogenic bacteria: Data from two pilot studies. World J Clin Cases 2017; 5:102-111. [PMID: 28352634 PMCID: PMC5352958 DOI: 10.12998/wjcc.v5.i3.102] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2016] [Revised: 12/14/2016] [Accepted: 01/03/2017] [Indexed: 02/05/2023] Open
Abstract
AIM To estimate the pharyngeal carriage rate of Neisseria meningitidis (N. meningitidis), Streptococcus pneumoniae (S. pneumoniae) and Staphylococcus aureus (S. aureus) among Australian Hajj pilgrims.
METHODS In 2014, surveillance was conducted in two phases among Australian Hajj pilgrims: The first phase during Hajj in Mina, and the second phase soon after returning home to Australia. Nasopharyngeal or oropharyngeal swabs were taken from participants then tested, firstly by nucleic acid testing, and also by standard culture.
RESULTS Of 183 participants recruited in the first phase, 26 (14.2%) tested positive for S. pneumoniae; 4 had received pneumococcal conjugate vaccine (PCV13). Only one tested positive for N. meningitidis (W). Of 93 2nd phase samples cultured, 17 (18.3%) grew S. aureus, all methicillin sensitive, 2 (2.2%) grew N. meningitidis (on subculture; one serotype B, one negative), and 1 (1%), from an unvaccinated pilgrim, grew S. pneumoniae.
CONCLUSION Relatively high carriage of S. pneumoniae and little meningococcal carriage was found. This indicates the importance of a larger study for improved infection surveillance and possible vaccine evaluation.
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34
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Occupational Infections. Infect Dis (Lond) 2017. [PMCID: PMC7149695 DOI: 10.1016/b978-0-7020-6285-8.00072-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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35
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Reynaga E, Navarro M, Vilamala A, Roure P, Quintana M, Garcia-Nuñez M, Figueras R, Torres C, Lucchetti G, Sabrià M. Prevalence of colonization by methicillin-resistant Staphylococcus aureus ST398 in pigs and pig farm workers in an area of Catalonia, Spain. BMC Infect Dis 2016; 16:716. [PMID: 27894267 PMCID: PMC5127002 DOI: 10.1186/s12879-016-2050-9] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Accepted: 11/21/2016] [Indexed: 11/30/2022] Open
Abstract
Background A livestock-associated clonal lineage (ST398) of methicillin-resistant Staphylococcus aureus (MRSA) has been identified causing colonization or infection in farm workers. The aim of the study was to analyze the prevalence of MRSA-ST398 colonization in pigs and in pig farmers in an area with a high pig population (Osona, Barcelona province, Catalonia, Spain). Methods We performed a cross-sectional prevalence study in Osona (Catalonia, Spain), from June 2014 to June 2015. All pig farm workers from 83 farms were studied. Twenty of these farms were randomly selected for the study of both pigs and farmers: 9 fattening and 11 farrow-to-finish farms. All workers over the age of 18 who agreed to participate were included. Samples were analyzed to identify MRSA-ST398 and their spa type. Results Eighty-one of the 140 pig farm workers analyzed (57.9% (95% IC: 50.0–66.4%)) were MRSA-positive, all of them ST398. The mean number of years worked on farms was 17.5 ± 12.6 (range:1–50), without significant differences between positive and negative MRSA results (p = 0.763). Over 75% of MRSA-ST398 carriers worked on farms with more than 1250 pigs (p < 0.001). At least one worker tested positive for MRSA-ST398 on all 20 selected pig farms. Ninety-two (46.0% (95% IC: 39.0–53.0%)) of the nasal swabs from 200 pigs from these 20 farms were MRSA-positive, with 50.5% of sows and 41.4% of fattening pigs (p = 0.198) giving MRSA-positive results. All the isolates were tetracycline-resistant, and were identified as MRSA-ST398. The spa type identified most frequently was t011 (62%). Similar spa types and phenotypes of antibiotic resistance were identified in pigs and farmers of 19/20 tested farms. Conclusions The prevalence of MRSA-ST398 among pig farm workers and pigs on farms in the studied region is very high, and the size of the farm seems to correlate with the frequency of colonization of farmers. The similar spa-types and phenotypes of resistance detected in pigs and workers in most of the farms studied suggest animal-to-human transmission.
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Affiliation(s)
- Esteban Reynaga
- Department of Internal Medicine, Hospital Universitari de Vic, Barcelona, Spain. .,Department of Medicine, Universitat Autònoma de Barcelona, Barcelona, Spain.
| | - Marian Navarro
- Microbiology Department, Hospital Universitari de Vic, Barcelona, Spain
| | - Anna Vilamala
- Microbiology Department, Hospital Universitari de Vic, Barcelona, Spain
| | - Pere Roure
- Epidemiology Department, Hospital Universitari de Vic, Barcelona, Spain
| | - Manuel Quintana
- Epidemiology Department Hospital Vall d'Hebron, Barcelona, Spain
| | - Marian Garcia-Nuñez
- Infectious Diseases Unit, Health Sciences Research Institute of the Germans Trias i Pujol Foundation, Badalona, Barcelona, Spain.,CIBER de Enfermedades Respiratorias, Madrid, Spain
| | - Raül Figueras
- Veterinary, Associació Tecnicosanitària del Porcí (ASSAPORC), Vic, Barcelona, Spain
| | - Carmen Torres
- Area de Bioquímica y Biología Molecular, Universidad de La Rioja, Logroño, Spain
| | - Gianni Lucchetti
- Department of Internal Medicine, Hospital Universitari de Vic, Barcelona, Spain
| | - Miquel Sabrià
- Department of Medicine, Universitat Autònoma de Barcelona, Barcelona, Spain.,Infectious Diseases Unit, Health Sciences Research Institute of the Germans Trias i Pujol Foundation, Badalona, Barcelona, Spain.,CIBER de Enfermedades Respiratorias, Madrid, Spain.,Infectious Diseases Department, Hospital Germans Trias i Pujol, Badalona, Barcelona, Spain
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36
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Bos MEH, Verstappen KM, van Cleef BAGL, Dohmen W, Dorado-García A, Graveland H, Duim B, Wagenaar JA, Kluytmans JAJW, Heederik DJJ. Transmission through air as a possible route of exposure for MRSA. JOURNAL OF EXPOSURE SCIENCE & ENVIRONMENTAL EPIDEMIOLOGY 2016; 26:263-9. [PMID: 25515375 DOI: 10.1038/jes.2014.85] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2014] [Revised: 10/14/2014] [Accepted: 10/16/2014] [Indexed: 05/23/2023]
Abstract
Livestock-associated methicillin-resistant Staphylococcus aureus (LA-MRSA) is highly prevalent in pigs and veal calves. The environment and air in pig and veal calf barns is often contaminated with LA-MRSA, and can act as a transmission source for humans. This study explores exposure-response relationships between sequence type 398 (ST398) MRSA air exposure level and nasal ST398 MRSA carriage in people working and/or living on farms. Samples and data were used from three longitudinal field studies in pig and veal calf farm populations. Samples consisted of nasal swabs from the human participants and electrostatic dust fall collectors capturing airborne settled dust in barns. In both multivariate and mutually adjusted analyses, a strong association was found between nasal ST398 MRSA carriage in people working in the barns for >20 h per week and MRSA air levels. In people working in the barns < 20 h per week there was a strong association between nasal carriage and number of working hours. Exposure to ST398 MRSA in barn air seems to be an important determinant for nasal carriage, especially in the highly exposed group of farmers, next to duration of contact with animals. Intervention measures should therefore probably also target reduction of ST398 MRSA air levels.
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Affiliation(s)
- Marian E H Bos
- Division of Environmental Epidemiology, Institute for Risk Assessment Sciences, Utrecht University, Utrecht, The Netherlands
| | - Koen M Verstappen
- Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Brigitte A G L van Cleef
- Laboratory for Medical Microbiology and Immunology, St. Elisabeth Hospital, Tilburg, The Netherlands
- Laboratory for Microbiology and Infection Control, Amphia Hospital, Breda, The Netherlands
| | - Wietske Dohmen
- Division of Environmental Epidemiology, Institute for Risk Assessment Sciences, Utrecht University, Utrecht, The Netherlands
| | - Alejandro Dorado-García
- Division of Environmental Epidemiology, Institute for Risk Assessment Sciences, Utrecht University, Utrecht, The Netherlands
- Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Haitske Graveland
- Division of Environmental Epidemiology, Institute for Risk Assessment Sciences, Utrecht University, Utrecht, The Netherlands
| | - Birgitta Duim
- Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Jaap A Wagenaar
- Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
- Central Veterinary Institute of Wageningen UR, Lelystad, The Netherlands
| | - Jan A J W Kluytmans
- Laboratory for Medical Microbiology and Immunology, St. Elisabeth Hospital, Tilburg, The Netherlands
- Laboratory for Microbiology and Infection Control, Amphia Hospital, Breda, The Netherlands
- Department of Medical Microbiology and Infection Control, VU University Medical Center, Amsterdam, The Netherlands
| | - Dick J J Heederik
- Division of Environmental Epidemiology, Institute for Risk Assessment Sciences, Utrecht University, Utrecht, The Netherlands
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37
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Fetsch A, Roesler U, Kraushaar B, Friese A. Co-colonization and clonal diversity of methicillin-sensitive and methicillin-resistant Staphylococcus aureus in sows. Vet Microbiol 2016; 185:7-14. [PMID: 26931385 DOI: 10.1016/j.vetmic.2016.01.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Revised: 01/07/2016] [Accepted: 01/16/2016] [Indexed: 11/19/2022]
Abstract
Methicillin-susceptible Staphylococcus (S.) aureus (MSSA) and methicillin-resistant S. aureus (MRSA) are colonizers of skin and mucosa. In humans, MSSA and MRSA compete for colonization space in the anterior nares of pig farmers; however, it was also shown that MSSA/MRSA co-colonization is common and one clone can be found rather than differing types of MSSA and MRSA. We investigated the colonization and clonality of both, MSSA and MRSA in pigs over a longer time. Eighteen sows were nasally sampled three times every ten weeks. Additionally, environmental samples were taken. Samples were investigated for MSSA and MRSA, respectively. The spa type was defined from up to five MRSA and MSSA isolates found per sample and sampling time; selected isolates were further investigated by microarray. Three sows (16.7%) were completely negative for MSSA and MRSA. Twelve pigs (66.7%) were irregularly positive for both, MSSA and MRSA over the time, whereas seven out of them (38.9%) were simultaneously colonized. CC398 (t034, t011) MRSA and CC9 (t337, t1430, and t13816) MSSA associated spa types were exclusively found. In 44.4% (n=8) of sows up to two different types of MSSA were present at the same time and sample. Strains of the same clonal lineage showed a high genetic identity despite their origin. Highly identic clones were present in sows and their environment. As conclusion, MSSA/MRSA may not exclude each other in the anterior nares of pigs. Pigs may also carry different clones at the same time.
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Affiliation(s)
- Alexandra Fetsch
- National Reference Laboratory for Coagulase-positive Staphylococci Incl. Staphylococcus aureus, Federal Institute for Risk Assessment, Max-Dohrn-Str. 8-10, 10589 Berlin, Germany.
| | - Uwe Roesler
- Institute for Animal Hygiene and Environmental Health, Freie Universität Berlin, Robert-von Ostertag-Straße 7-13, 14163 Berlin, Germany
| | - Britta Kraushaar
- National Reference Laboratory for Coagulase-positive Staphylococci Incl. Staphylococcus aureus, Federal Institute for Risk Assessment, Max-Dohrn-Str. 8-10, 10589 Berlin, Germany
| | - Anika Friese
- Institute for Animal Hygiene and Environmental Health, Freie Universität Berlin, Robert-von Ostertag-Straße 7-13, 14163 Berlin, Germany
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38
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Health and health-related quality of life in pig farmers carrying livestock-associated methicillin-resistant Staphylococcus aureus. Epidemiol Infect 2016; 144:1774-83. [PMID: 26733049 DOI: 10.1017/s0950268815003192] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
There is limited knowledge about the effect of livestock-associated methicillin-resistant Staphylococcus aureus (LA-MRSA) carriage on health-related quality of life (QoL). With this study, we explored whether LA-MRSA causes infections or affects health-related QoL in pig farmers. This prospective cohort study surveyed persons working on 49 farrowing pig farms in The Netherlands for 1 year (2010-2011). On six sampling moments, nasal swabs, environmental samples and questionnaires on activities and infections were collected. At the end of the study year, persons were asked about their QoL using the validated SF-36 and EQ-5D questionnaires. Of 120 persons, 44 (37%) were persistent MRSA carriers. MRSA carriage was not associated with infections, use of antimicrobials, healthcare contact and health-related QoL items in univariate or multivariate analysis, most likely due to the 'healthy worker effect'. Despite high carriage rates, the impact of LA-MRSA carriage in this population of relatively healthy pig farmers on health and health-related QoL appears limited; more research is needed for confirmation.
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Individual predisposition to Staphylococcus aureus colonization in pigs on the basis of quantification, carriage dynamics, and serological profiles. Appl Environ Microbiol 2016; 81:1251-6. [PMID: 25501475 DOI: 10.1128/aem.03392-14] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Previous research on Staphylococcus aureus in pigs focused on livestock-associated methicillin-resistant S. aureus (MRSA) and had a qualitative cross-sectional design. This study aimed to elucidate the frequency, load, and stability of S. aureus nasal carriage in pigs over time and investigated possible associations between carriage and immune response. Nasal swabs were collected three times weekly from 480 tagged adult pigs in 20 Danish production farms. S. aureus and MRSA were quantified on selective media by the most-probable-number method. The levels of IgG against 10 S. aureus antigens in serum were quantified in selected pigs by a Luminex assay. All the farms were positive for S. aureus and 15 for MRSA, leading to overall prevalences of persistent and intermittent carriers and noncarriers of 24, 52, and 23%, respectively. Carriage frequency and nasal loads were significantly higher on MRSA-positive farms. Logistic-regression modeling revealed the presence of individual pigs characterized by high nasal loads (>10,000 CFU per swab) and stable carriage regardless of farm- and pen-associated factors. On the other hand, the humoral response was strongly influenced by these environmental factors. The existence of a minority of shedders contributing to maintenance of S. aureus within farms opens up new perspectives on the control of MRSA in pig farming.
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40
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Goerge T, Lorenz MB, van Alen S, Hübner NO, Becker K, Köck R. MRSA colonization and infection among persons with occupational livestock exposure in Europe: Prevalence, preventive options and evidence. Vet Microbiol 2015; 200:6-12. [PMID: 26658156 DOI: 10.1016/j.vetmic.2015.10.027] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2015] [Revised: 10/19/2015] [Accepted: 10/27/2015] [Indexed: 12/31/2022]
Abstract
Colonization with livestock-associated Methicillin-resistant Staphylococcusaureus (LA-MRSA) among persons occupationally exposed to pigs, cattle or poultry is very frequent. In Europe, LA-MRSA mostly belong to the clonal lineage CC398. Since colonized persons have an increased risk of developing MRSA infections, defining the burden of work-related infection caused by LA-MRSA CC398 is of interest to exposed personnel, insurance companies and infection control staff. This review summarizes data on the types of occupation-related infections caused by LA-MRSA CC398, the incidence of such infections as well as potential preventive strategies. We identified twelve case reports on infections among livestock-exposed persons. Overall, there is a lack of data describing the incidence of occupation-related infections due to MRSA CC398. Currently, no specific guidance towards the prevention of LA-MRSA CC398 colonization of persons with routine exposure exists. In vitro, MRSA CC398 strains are susceptible (>95%) to mupirocin. Single reports have described effective decolonization of persons carrying LA-MRSA CC398, but long-term success rates are low in case of continuous livestock contact. Overall, the occupational health risk due to LA-MRSA CC398 is not well understood. Currently, prevention of human LA-MRSA CC398 infection is mostly based on the recommendation to perform screening and decolonization therapies prior to elective medical interventions in order to avoid nosocomial infections, but there is no conclusive evidence to perform specific measures aiming to forestall community-acquired infections.
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Affiliation(s)
- Tobias Goerge
- University Hospital Münster, Department of Dermatology, Von-Esmarch-Str. 58, 48149 Münster, Germany
| | - Marthe Barbara Lorenz
- University Hospital Münster, Department of Dermatology, Von-Esmarch-Str. 58, 48149 Münster, Germany
| | - Sarah van Alen
- University Hospital Münster, Institute of Medical Microbiology, Domagkstr. 10, 48149 Münster, Germany
| | - Nils-Olaf Hübner
- Institute of Medical Diagnostics (IMD), Vitus-Bering-Straße 27a, 17493 Greifswald, Germany
| | - Karsten Becker
- University Hospital Münster, Institute of Medical Microbiology, Domagkstr. 10, 48149 Münster, Germany
| | - Robin Köck
- University Hospital Münster, Institute of Medical Microbiology, Domagkstr. 10, 48149 Münster, Germany,.
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van Cleef BAGL, van Benthem BHB, Verkade EJM, van Rijen MML, Kluytmans-van den Bergh MFQ, Graveland H, Bosch T, Verstappen KMHW, Wagenaar JA, Bos MEH, Heederik D, Kluytmans JAJW. Livestock-associated MRSA in household members of pig farmers: transmission and dynamics of carriage, a prospective cohort study. PLoS One 2015; 10:e0127190. [PMID: 25993665 PMCID: PMC4436301 DOI: 10.1371/journal.pone.0127190] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2015] [Accepted: 04/12/2015] [Indexed: 02/02/2023] Open
Abstract
This prospective cohort study describes carriage of livestock-associated methicillin-resistant Staphylococcus aureus (LA-MRSA) in household members from 49 farrowing pig farms in the Netherlands (2010–2011). Of 171 household members, 4% were persistent MRSA nasal carriers, and the MRSA prevalence on any given sampling moment was 10% (range 7-11%). Working in the stables (of which 98% was MRSA-positive, prevalence ratio (PR) = 2.11 per 10 hours), working with sows (PR=1.97), and living with an MRSA-positive pig farmer (PR=4.63) were significant determinants for MRSA carriage. Significant protective factors were carriage of methicillin-susceptible Staphylococcus aureus (MSSA) (PR=0.50), and wearing a facemask when working in the stables (37% decreased prevalence). All MRSA strains during the study period were known livestock-associated types. The bacteriophage φ3 was not found in household members. Transmission from pigs and the environment appeared to be important determinants; human-to-human transmission could not sufficiently be differentiated. Wearing a facemask when working in the stables and carriage of MSSA are potential interventional targets.
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Affiliation(s)
- Brigitte A. G. L. van Cleef
- Laboratory for Microbiology and Infection Control, Amphia Hospital, Breda, the Netherlands
- Laboratory for Medical Microbiology and Immunology, St. Elisabeth Hospital, Tilburg, the Netherlands
- Centre for Infectious Disease Control Netherlands, National Institute for Public Health and the Environment, Bilthoven, the Netherlands
- * E-mail:
| | - Birgit H. B. van Benthem
- Centre for Infectious Disease Control Netherlands, National Institute for Public Health and the Environment, Bilthoven, the Netherlands
| | - Erwin J. M. Verkade
- Laboratory for Microbiology and Infection Control, Amphia Hospital, Breda, the Netherlands
- Laboratory for Medical Microbiology and Immunology, St. Elisabeth Hospital, Tilburg, the Netherlands
| | | | - Marjolein F. Q. Kluytmans-van den Bergh
- Amphia Academy Infectious Disease Foundation, Amphia Hospital, Breda, the Netherlands
- Julius Center for Health Sciences and Primary Care, UMC Utrecht, Utrecht, the Netherlands
| | - Haitske Graveland
- Institute for Risk Assessment Sciences, Utrecht University, Utrecht, the Netherlands
- Department of Infectious Diseases and Immunology, Utrecht University, Utrecht, the Netherlands
| | - Thijs Bosch
- Centre for Infectious Disease Control Netherlands, National Institute for Public Health and the Environment, Bilthoven, the Netherlands
| | | | - Jaap A. Wagenaar
- Department of Infectious Diseases and Immunology, Utrecht University, Utrecht, the Netherlands
- Central Veterinary Institute of Wageningen UR, Lelystad, the Netherlands
| | - Marian E. H. Bos
- Institute for Risk Assessment Sciences, Utrecht University, Utrecht, the Netherlands
| | - Dick Heederik
- Institute for Risk Assessment Sciences, Utrecht University, Utrecht, the Netherlands
| | - Jan A. J. W. Kluytmans
- Laboratory for Microbiology and Infection Control, Amphia Hospital, Breda, the Netherlands
- Laboratory for Medical Microbiology and Immunology, St. Elisabeth Hospital, Tilburg, the Netherlands
- Department of Medical Microbiology and Infection prevention, VU University medical center, Amsterdam, the Netherlands
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Höjgård S, Aspevall O, Bengtsson B, Hæggman S, Lindberg M, Mieziewska K, Nilsson S, Ericsson Unnerstad H, Viske D, Wahlström H. Preventing introduction of livestock associated MRSA in a pig population--benefits, costs, and knowledge gaps from the Swedish perspective. PLoS One 2015; 10:e0122875. [PMID: 25923329 PMCID: PMC4414519 DOI: 10.1371/journal.pone.0122875] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Accepted: 02/24/2015] [Indexed: 11/18/2022] Open
Abstract
Antibiotic resistance is a growing concern in human, as well as in veterinary medicine. Part of the problem concerns how to respond to the risk presented by animal reservoirs of resistant bacteria with the potential of spreading to humans. One example is livestock associated methicillin-resistant Staphylococcus aureus (LA-MRSA). In countries where LA-MRSA is endemic in the pig population, people in contact with pigs have a higher risk of being colonised with LA-MRSA, and persons from this group are subjected to precautionary measures when visiting health care facilities. In the present study, it is assumed that, if LA-MRSA was introduced to the Swedish pig population, the prevalence in the risk groups would be the same as in Denmark or the Netherlands (two countries with low human prevalence that have implemented measures to detect, trace and isolate human LA-MRSA cases and, therefore, have comprehensive data with good coverage regarding prevalence of LA-MRSA), and that similar interventions would be taken in Swedish health care facilities. It is also assumed that the Swedish pig population is free of MRSA or that the prevalence is very low. We analyse if it would be efficient for Sweden to prevent its introduction by testing imported live breeding pigs. Given that quarantining and testing at import will prevent introduction to the pig population, the study shows that the preventive measures may indeed generate a societal net benefit. Benefits are estimated to be between € 870 720 and € 1 233 511, and costs to € 211 129. Still, due to gaps in knowledge, the results should be confirmed when more information become available.
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Affiliation(s)
- Sören Höjgård
- Swedish University for Agricultural Sciences, and AgriFood Economics Centre, Uppsala, Sweden
- * E-mail:
| | | | | | | | - Maria Lindberg
- Federation of Swedish Farmers, Stockholm, Sweden
- Swedish Animal Health Service, Uppsala, Sweden
| | | | | | | | - Diana Viske
- Swedish Board of Agriculture, Jönköping, Sweden
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Normanno G, Dambrosio A, Lorusso V, Samoilis G, Di Taranto P, Parisi A. Methicillin-resistant Staphylococcus aureus (MRSA) in slaughtered pigs and abattoir workers in Italy. Food Microbiol 2015; 51:51-6. [PMID: 26187827 DOI: 10.1016/j.fm.2015.04.007] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Revised: 04/15/2015] [Accepted: 04/19/2015] [Indexed: 11/19/2022]
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) is a pathogen present in the hospital environment (HA-MRSA), in the community (CA-MRSA) and in livestock, including pigs (LA-MRSA). MRSA may enter the human food chain during slaughtering and may infect humans coming into direct contact with pigs or pork products. This study aimed to determine the prevalence and characteristics of MRSA isolated from pigs and workers at industrial abattoirs in southern Italy. A total of 215 pig nasal swabs were screened for the presence of MRSA using PCR. An MRSA isolate was detected from each mecA/nuc PCR-positive sample and characterized by spa-typing, Multi-Locus Sequence Typing, SCC-mec and Panton-Valentine Leukocidin (PVL), and also tested for the production of staphylococcal enterotoxins (SEs). Eighty-one MRSA isolates (37.6%) were obtained from the 215 pig nasal swabs; 37 of these isolates were further characterized, and showed 18 different spa-types and 8 different STs. The most frequently recovered STs were ST398 (CC398-t034, t011, t899, t1939 - 43.2%) followed by ST8 (CC8-t008, t064, t2953, t5270 - 24.3%) and ST1 (CC1-t127, t174, t2207 - 10.8%). Nine MRSA isolates were obtained from the 113 human swabs; the isolates showed 5 different spa-types and 5 different STs, including the novel ST2794 (t159). The most representative STs recovered were ST1 (CC1-t127) and ST398 (CC398-t034) (33.3%). None of the MRSA isolates showed the ability to produce SEs and PVL and all resulted resistant to two or more classes of antimicrobials. This study shows the great genetic diversity of MRSA strains in slaughtered pigs and in abattoir employees in Italy, and clearly demonstrates the need for improved hygiene standards to reduce the risk of occupational and food-borne infection linked to the handling/consumption of raw pork containing MRSA.
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Affiliation(s)
- Giovanni Normanno
- Department of Science of Agriculture, Food and the Environment (SAFE), University of Foggia, Foggia, Italy.
| | - Angela Dambrosio
- Department of Emergency and Organ Transplants, University of Bari, Bari, Italy
| | - Vanessa Lorusso
- Department of Soil Sciences, of Plants and Food, University of Bari, Bari, Italy
| | | | - Pietro Di Taranto
- Department of Science of Agriculture, Food and the Environment (SAFE), University of Foggia, Foggia, Italy
| | - Antonio Parisi
- Experimental Zooprophylactic Institute of Apulia and Basilicata, Foggia, Italy
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44
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Martin LJ, Adams RI, Bateman A, Bik HM, Hawks J, Hird SM, Hughes D, Kembel SW, Kinney K, Kolokotronis SO, Levy G, McClain C, Meadow JF, Medina RF, Mhuireach G, Moreau CS, Munshi-South J, Nichols LM, Palmer C, Popova L, Schal C, Täubel M, Trautwein M, Ugalde JA, Dunn RR. Evolution of the indoor biome. Trends Ecol Evol 2015; 30:223-32. [DOI: 10.1016/j.tree.2015.02.001] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2014] [Revised: 02/08/2015] [Accepted: 02/09/2015] [Indexed: 11/15/2022]
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45
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Shafiullah S, Hernández-Jover M, Jordan D, Groves M, Heller J. Detection of methicillin-resistant and methicillin-susceptible Staphylococcus aureus among pigs in different stages of production. ANIMAL PRODUCTION SCIENCE 2015. [DOI: 10.1071/anv55n12ab083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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46
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Burns A, Shore AC, Brennan GI, Coleman DC, Egan J, Fanning S, Galligan MC, Gibbons JF, Gutierrez M, Malhotra-Kumar S, Markey BK, Sabirova JS, Wang J, Leonard FC. A longitudinal study of Staphylococcus aureus colonization in pigs in Ireland. Vet Microbiol 2014; 174:504-513. [PMID: 25465665 DOI: 10.1016/j.vetmic.2014.10.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2013] [Revised: 10/14/2014] [Accepted: 10/16/2014] [Indexed: 02/08/2023]
Abstract
The emergence of methicillin-resistant Staphylococcus aureus (MRSA) in livestock has refocused attention on S. aureus colonization and transmission in pigs. This study investigated the effect of the S. aureus colonization status of a sow on the colonization status of her piglets, and whether pigs carry the same strain of S. aureus throughout production. Nasal swabs were collected from the piglets of six healthy sows two days after birth and two days before and two days after they were moved into each production stage. The average prevalence of S. aureus colonization varied between 26% and 73%. The odds of being S. aureus positive were almost 12 times higher for piglets born to nasal-positive sows than for those born to nasal-negative sows, and three times higher again for piglets born to sows that were both nasal- and vaginal-positive. Isolates recovered from piglets immediately after birth were indistinguishable from those of the dam as determined by phenotypic and molecular typing, including microarray analysis and optical mapping. All isolates belonged to clonal complex 9 and the majority exhibited a novel spa type, t10449. The findings show that the S. aureus colonization status of the sow influences the colonization status of her piglets in the early production stages but strains carried by pigs change over time. Multiresistant S. aureus was detected, in particular post-weaning. Results suggest that sow status and management practices, including mixing of pigs and antimicrobial usage at weaning, should be considered when implementing control measures for S. aureus on a farm.
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Affiliation(s)
- A Burns
- School of Veterinary Medicine, University College Dublin, Belfield, Dublin 4, Ireland
| | - A C Shore
- Microbiology Research Unit, Dublin Dental University Hospital, University of Dublin, Trinity College Dublin, Ireland; Department of Clinical Microbiology, School of Medicine, Trinity College Dublin, St. James's Hospital, Dublin 8, Ireland
| | - G I Brennan
- Department of Clinical Microbiology, School of Medicine, Trinity College Dublin, St. James's Hospital, Dublin 8, Ireland
| | - D C Coleman
- Microbiology Research Unit, Dublin Dental University Hospital, University of Dublin, Trinity College Dublin, Ireland
| | - J Egan
- National Reference Laboratory for Antimicrobial Resistance (Food, Feed and Animal Health), Department of Agriculture, Food and the Marine, Backweston Laboratories, Celbridge, Co. Kildare, Ireland
| | - S Fanning
- School of Public Health, Physiotherapy and Population Science, Science Centre, University College Dublin, Belfield, Dublin 4, Ireland
| | - M C Galligan
- School of Mathematical Sciences, University College Dublin, Belfield, Dublin 4, Ireland
| | - J F Gibbons
- School of Veterinary Medicine, University College Dublin, Belfield, Dublin 4, Ireland
| | - M Gutierrez
- National Reference Laboratory for Antimicrobial Resistance (Food, Feed and Animal Health), Department of Agriculture, Food and the Marine, Backweston Laboratories, Celbridge, Co. Kildare, Ireland
| | - S Malhotra-Kumar
- Laboratory of Medical Microbiology, Vaccine & Infectious Diseases Institute, University of Antwerp, Antwerp, Belgium
| | - B K Markey
- School of Veterinary Medicine, University College Dublin, Belfield, Dublin 4, Ireland
| | - J S Sabirova
- Laboratory of Medical Microbiology, Vaccine & Infectious Diseases Institute, University of Antwerp, Antwerp, Belgium
| | - J Wang
- School of Public Health, Physiotherapy and Population Science, Science Centre, University College Dublin, Belfield, Dublin 4, Ireland
| | - F C Leonard
- School of Veterinary Medicine, University College Dublin, Belfield, Dublin 4, Ireland.
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