Methicillin‐resistant Staphylococcus aureus in the Australian community: an evolving epidemic

Objective: To describe antimicrobial resistance and molecular epidemiology of methicillin‐resistant Staphylococcus aureus (MRSA) isolated in community settings in Australia. Design and setting: Survey of S. aureus isolates collected prospectively Australia‐wide between July 2004 and February 2005; r...

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Veröffentlicht in:Medical journal of Australia 2006-04, Vol.184 (8), p.384-388
Hauptverfasser: Nimmo, Graeme R, Coombs, Geoffrey W, Pearson, Julie C, OˈBrien, Francis G, Christiansen, Keryn J, Turnidge, John D, Gosbell, Iain B, Collignon, Peter, McLaws, Mary‐Louise
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container_end_page 388
container_issue 8
container_start_page 384
container_title Medical journal of Australia
container_volume 184
creator Nimmo, Graeme R
Coombs, Geoffrey W
Pearson, Julie C
OˈBrien, Francis G
Christiansen, Keryn J
Turnidge, John D
Gosbell, Iain B
Collignon, Peter
McLaws, Mary‐Louise
description Objective: To describe antimicrobial resistance and molecular epidemiology of methicillin‐resistant Staphylococcus aureus (MRSA) isolated in community settings in Australia. Design and setting: Survey of S. aureus isolates collected prospectively Australia‐wide between July 2004 and February 2005; results were compared with those of similar surveys conducted in 2000 and 2002. Main outcome measures: Up to 100 consecutive, unique clinical isolates of S. aureus from outpatient settings were collected at each of 22 teaching hospital and five private laboratories from cities in all Australian states and territories. They were characterised by antimicrobial susceptibilities (by agar dilution methods), coagulase gene typing, pulsed‐field gel electrophoresis, multilocus sequence typing, SCCmec typing and polymerase chain reaction tests for Panton–Valentine leukocidin (PVL) gene. Results: 2652 S. aureus isolates were collected, of which 395 (14.9%) were MRSA. The number of community‐associated MRSA (CA‐MRSA) isolates rose from 4.7% (118/2498) of S. aureus isolates in 2000 to 7.3% (194/2652) in 2004 (P = 0.001). Of the three major CA‐MRSA strains, WA‐1 constituted 45/257 (18%) of MRSA in 2000 and 64/395 (16%) in 2004 (P = 0.89), while the Queensland (QLD) strain increased from 13/257 (5%) to 58/395 (15%) (P = 0.0004), and the south‐west Pacific (SWP) strain decreased from 33/257 (13%) to 26/395 (7%) (P = 0.01). PVL genes were detected in 90/195 (46%) of CA‐MRSA strains, including 5/64 (8%) of WA‐1, 56/58 (97%) of QLD, and 25/26 (96%) of SWP strains. Among health care‐associated MRSA strains, all AUS‐2 and AUS‐3 isolates were multidrug‐resistant, and UK EMRSA‐15 isolates were resistant to ciprofloxacin and erythromycin (50%) or to ciprofloxacin alone (44%). Almost all (98%) of CA‐MRSA strains were non‐multiresistant. Conclusions: Community‐onset MRSA continues to spread throughout Australia. The hypervirulence determinant PVL is often found in two of the most common CA‐MRSA strains. The rapid changes in prevalence emphasise the importance of ongoing surveillance.
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Design and setting: Survey of S. aureus isolates collected prospectively Australia‐wide between July 2004 and February 2005; results were compared with those of similar surveys conducted in 2000 and 2002. Main outcome measures: Up to 100 consecutive, unique clinical isolates of S. aureus from outpatient settings were collected at each of 22 teaching hospital and five private laboratories from cities in all Australian states and territories. They were characterised by antimicrobial susceptibilities (by agar dilution methods), coagulase gene typing, pulsed‐field gel electrophoresis, multilocus sequence typing, SCCmec typing and polymerase chain reaction tests for Panton–Valentine leukocidin (PVL) gene. Results: 2652 S. aureus isolates were collected, of which 395 (14.9%) were MRSA. The number of community‐associated MRSA (CA‐MRSA) isolates rose from 4.7% (118/2498) of S. aureus isolates in 2000 to 7.3% (194/2652) in 2004 (P = 0.001). Of the three major CA‐MRSA strains, WA‐1 constituted 45/257 (18%) of MRSA in 2000 and 64/395 (16%) in 2004 (P = 0.89), while the Queensland (QLD) strain increased from 13/257 (5%) to 58/395 (15%) (P = 0.0004), and the south‐west Pacific (SWP) strain decreased from 33/257 (13%) to 26/395 (7%) (P = 0.01). PVL genes were detected in 90/195 (46%) of CA‐MRSA strains, including 5/64 (8%) of WA‐1, 56/58 (97%) of QLD, and 25/26 (96%) of SWP strains. Among health care‐associated MRSA strains, all AUS‐2 and AUS‐3 isolates were multidrug‐resistant, and UK EMRSA‐15 isolates were resistant to ciprofloxacin and erythromycin (50%) or to ciprofloxacin alone (44%). Almost all (98%) of CA‐MRSA strains were non‐multiresistant. Conclusions: Community‐onset MRSA continues to spread throughout Australia. The hypervirulence determinant PVL is often found in two of the most common CA‐MRSA strains. The rapid changes in prevalence emphasise the importance of ongoing surveillance.</description><identifier>ISSN: 0025-729X</identifier><identifier>EISSN: 1326-5377</identifier><identifier>DOI: 10.5694/j.1326-5377.2006.tb00287.x</identifier><identifier>PMID: 16618236</identifier><identifier>CODEN: MJAUAJ</identifier><language>eng</language><publisher>Sydney: Australasian Medical Publishing Company</publisher><subject>Abscesses ; Antibiotics ; Antimicrobial agents ; Australia - epidemiology ; Biological and medical sciences ; Community-Acquired Infections - drug therapy ; Community-Acquired Infections - epidemiology ; Community-Acquired Infections - microbiology ; Cross Infection - drug therapy ; Cross Infection - epidemiology ; Cross Infection - microbiology ; Disease Outbreaks - statistics &amp; numerical data ; Drug resistance ; Epidemics ; Epidemiology ; General aspects ; Genes ; Geography ; Health Surveys ; Humans ; Infectious diseases ; Laboratories ; Medical sciences ; Methicillin Resistance - genetics ; Microbiology ; Miscellaneous ; Phenotype ; Pneumonia ; Polymerase chain reaction ; Public health. Hygiene ; Public health. Hygiene-occupational medicine ; Staphylococcal Infections - drug therapy ; Staphylococcal Infections - epidemiology ; Staphylococcal Infections - microbiology ; Staphylococcus aureus - drug effects ; Staphylococcus aureus - genetics ; Staphylococcus aureus - isolation &amp; purification ; Staphylococcus infections ; Surveillance ; Teaching hospitals</subject><ispartof>Medical journal of Australia, 2006-04, Vol.184 (8), p.384-388</ispartof><rights>2006 AMPCo Pty Ltd. All rights reserved</rights><rights>2006 INIST-CNRS</rights><rights>Copyright Australasian Medical Publishing Company Proprietary, Ltd. 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Design and setting: Survey of S. aureus isolates collected prospectively Australia‐wide between July 2004 and February 2005; results were compared with those of similar surveys conducted in 2000 and 2002. Main outcome measures: Up to 100 consecutive, unique clinical isolates of S. aureus from outpatient settings were collected at each of 22 teaching hospital and five private laboratories from cities in all Australian states and territories. They were characterised by antimicrobial susceptibilities (by agar dilution methods), coagulase gene typing, pulsed‐field gel electrophoresis, multilocus sequence typing, SCCmec typing and polymerase chain reaction tests for Panton–Valentine leukocidin (PVL) gene. Results: 2652 S. aureus isolates were collected, of which 395 (14.9%) were MRSA. The number of community‐associated MRSA (CA‐MRSA) isolates rose from 4.7% (118/2498) of S. aureus isolates in 2000 to 7.3% (194/2652) in 2004 (P = 0.001). Of the three major CA‐MRSA strains, WA‐1 constituted 45/257 (18%) of MRSA in 2000 and 64/395 (16%) in 2004 (P = 0.89), while the Queensland (QLD) strain increased from 13/257 (5%) to 58/395 (15%) (P = 0.0004), and the south‐west Pacific (SWP) strain decreased from 33/257 (13%) to 26/395 (7%) (P = 0.01). PVL genes were detected in 90/195 (46%) of CA‐MRSA strains, including 5/64 (8%) of WA‐1, 56/58 (97%) of QLD, and 25/26 (96%) of SWP strains. Among health care‐associated MRSA strains, all AUS‐2 and AUS‐3 isolates were multidrug‐resistant, and UK EMRSA‐15 isolates were resistant to ciprofloxacin and erythromycin (50%) or to ciprofloxacin alone (44%). Almost all (98%) of CA‐MRSA strains were non‐multiresistant. Conclusions: Community‐onset MRSA continues to spread throughout Australia. The hypervirulence determinant PVL is often found in two of the most common CA‐MRSA strains. 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Hygiene-occupational medicine</topic><topic>Staphylococcal Infections - drug therapy</topic><topic>Staphylococcal Infections - epidemiology</topic><topic>Staphylococcal Infections - microbiology</topic><topic>Staphylococcus aureus - drug effects</topic><topic>Staphylococcus aureus - genetics</topic><topic>Staphylococcus aureus - isolation &amp; purification</topic><topic>Staphylococcus infections</topic><topic>Surveillance</topic><topic>Teaching hospitals</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Nimmo, Graeme R</creatorcontrib><creatorcontrib>Coombs, Geoffrey W</creatorcontrib><creatorcontrib>Pearson, Julie C</creatorcontrib><creatorcontrib>OˈBrien, Francis G</creatorcontrib><creatorcontrib>Christiansen, Keryn J</creatorcontrib><creatorcontrib>Turnidge, John D</creatorcontrib><creatorcontrib>Gosbell, Iain B</creatorcontrib><creatorcontrib>Collignon, Peter</creatorcontrib><creatorcontrib>McLaws, Mary‐Louise</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>ProQuest Health &amp; Medical Complete (Alumni)</collection><collection>Nursing &amp; Allied Health Premium</collection><collection>MEDLINE - Academic</collection><jtitle>Medical journal of Australia</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Nimmo, Graeme R</au><au>Coombs, Geoffrey W</au><au>Pearson, Julie C</au><au>OˈBrien, Francis G</au><au>Christiansen, Keryn J</au><au>Turnidge, John D</au><au>Gosbell, Iain B</au><au>Collignon, Peter</au><au>McLaws, Mary‐Louise</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Methicillin‐resistant Staphylococcus aureus in the Australian community: an evolving epidemic</atitle><jtitle>Medical journal of Australia</jtitle><addtitle>Med J Aust</addtitle><date>2006-04-17</date><risdate>2006</risdate><volume>184</volume><issue>8</issue><spage>384</spage><epage>388</epage><pages>384-388</pages><issn>0025-729X</issn><eissn>1326-5377</eissn><coden>MJAUAJ</coden><abstract>Objective: To describe antimicrobial resistance and molecular epidemiology of methicillin‐resistant Staphylococcus aureus (MRSA) isolated in community settings in Australia. Design and setting: Survey of S. aureus isolates collected prospectively Australia‐wide between July 2004 and February 2005; results were compared with those of similar surveys conducted in 2000 and 2002. Main outcome measures: Up to 100 consecutive, unique clinical isolates of S. aureus from outpatient settings were collected at each of 22 teaching hospital and five private laboratories from cities in all Australian states and territories. They were characterised by antimicrobial susceptibilities (by agar dilution methods), coagulase gene typing, pulsed‐field gel electrophoresis, multilocus sequence typing, SCCmec typing and polymerase chain reaction tests for Panton–Valentine leukocidin (PVL) gene. Results: 2652 S. aureus isolates were collected, of which 395 (14.9%) were MRSA. The number of community‐associated MRSA (CA‐MRSA) isolates rose from 4.7% (118/2498) of S. aureus isolates in 2000 to 7.3% (194/2652) in 2004 (P = 0.001). Of the three major CA‐MRSA strains, WA‐1 constituted 45/257 (18%) of MRSA in 2000 and 64/395 (16%) in 2004 (P = 0.89), while the Queensland (QLD) strain increased from 13/257 (5%) to 58/395 (15%) (P = 0.0004), and the south‐west Pacific (SWP) strain decreased from 33/257 (13%) to 26/395 (7%) (P = 0.01). PVL genes were detected in 90/195 (46%) of CA‐MRSA strains, including 5/64 (8%) of WA‐1, 56/58 (97%) of QLD, and 25/26 (96%) of SWP strains. Among health care‐associated MRSA strains, all AUS‐2 and AUS‐3 isolates were multidrug‐resistant, and UK EMRSA‐15 isolates were resistant to ciprofloxacin and erythromycin (50%) or to ciprofloxacin alone (44%). Almost all (98%) of CA‐MRSA strains were non‐multiresistant. Conclusions: Community‐onset MRSA continues to spread throughout Australia. The hypervirulence determinant PVL is often found in two of the most common CA‐MRSA strains. The rapid changes in prevalence emphasise the importance of ongoing surveillance.</abstract><cop>Sydney</cop><pub>Australasian Medical Publishing Company</pub><pmid>16618236</pmid><doi>10.5694/j.1326-5377.2006.tb00287.x</doi><tpages>5</tpages><oa>free_for_read</oa></addata></record>
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subjects Abscesses
Antibiotics
Antimicrobial agents
Australia - epidemiology
Biological and medical sciences
Community-Acquired Infections - drug therapy
Community-Acquired Infections - epidemiology
Community-Acquired Infections - microbiology
Cross Infection - drug therapy
Cross Infection - epidemiology
Cross Infection - microbiology
Disease Outbreaks - statistics & numerical data
Drug resistance
Epidemics
Epidemiology
General aspects
Genes
Geography
Health Surveys
Humans
Infectious diseases
Laboratories
Medical sciences
Methicillin Resistance - genetics
Microbiology
Miscellaneous
Phenotype
Pneumonia
Polymerase chain reaction
Public health. Hygiene
Public health. Hygiene-occupational medicine
Staphylococcal Infections - drug therapy
Staphylococcal Infections - epidemiology
Staphylococcal Infections - microbiology
Staphylococcus aureus - drug effects
Staphylococcus aureus - genetics
Staphylococcus aureus - isolation & purification
Staphylococcus infections
Surveillance
Teaching hospitals
title Methicillin‐resistant Staphylococcus aureus in the Australian community: an evolving epidemic
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