USA300 Methicillin-Resistant Staphylococcus aureus Emerging as a Cause of Bloodstream Infections at Military Medical Centers

2013 ◽  
Vol 34 (4) ◽  
pp. 393-399 ◽  
Author(s):  
Jeffrey Sherwood ◽  
Matthew Park ◽  
Paul Robben ◽  
Timothy Whitman ◽  
Michael W. Ellis
Keyword(s):  
Staphylococcus Aureus ◽  
Medical Center ◽  
Service Members ◽  
Walter Reed Army Medical ◽  
Healthcare Associated Infection ◽  
Retrospective Case ◽  
Methicillin Resistant ◽  
Medical Centers ◽  
Healthcare Associated ◽  
Epidemiological Characteristics

Background.USA300 methicillin-resistant Staphylococcus aureus (MRSA) is a common cause of skin and soft-tissue infection (SSTI) in military personnel. USA300 MRSA has emerged as an important cause of healthcare-associated bloodstream infection (BSI) in metropolitan centers.Objective.To determine the prevalence, risk factors, and patient outcomes associated with USA300 MRSA BSI in military tertiary medical centers.Design.Retrospective case-control study.Patients.Patients admitted during the period 2001–2009 with MRSA BSI.Setting.Walter Reed Army Medical Center (Washington, DC) and National Naval Medical Center (Bethesda, MD) tertiary medical centers with 500 inpatient beds combined, which provide care to active duty service members and military beneficiaries.Methods.After identifying patients with MRSA BSI, we collected epidemiological data from electronic medical records and characterized bacterial isolates using pulsed-field gel electrophoresis (PFGE).Results.A total of 245 MRSA BSI cases were identified, and 151 isolates were available for analysis. Epidemiological characteristics for the 151 patients with available isolates included the following: mean age, 61 years; male sex, 70%; white race, 62%; and combat-wounded service members, 11%. The crude in-hospital mortality rate was 17%. PFGE demonstrated that 30 (20%) of 151 MRSA BSI cases with isolates available for analysis were due to USA300, and 27 (87%) of these 30 cases were healthcare-associated infection. USA300 was associated with a significantly increasing proportion of MRSA BSI when examined over sequential time periods: 2 (4%) of 51 isolates during 2001–2003, 9 (19%) of 47 isolates during 2004–2006, and 19 (36%) of 53 isolates during 2007–2009 (P<.001).Conclusion.USA300 MRSA is emerging as a cause of healthcare-associated BSI in tertiary military medical centers.

scholarly journals Blurred molecular epidemiological lines between the two dominant methicillin-resistant Staphylococcus aureus clones

2018 ◽  
Author(s):  
Amy C. Dupper ◽  
Mitchell J. Sullivan ◽  
Kieran I. Chacko ◽  
Aaron Mishkin ◽  
Brianne Ciferri ◽  
...  
Keyword(s):  
New York ◽  
Staphylococcus Aureus ◽  
Medical Center ◽  
Data Extraction ◽  
Age Groups ◽  
Bloodstream Infections ◽  
Methicillin Resistant ◽  
Peripheral Intravenous Catheter ◽  
Life Threatening ◽  
Healthcare Associated

AbstractBackgroundMethicillin-resistant Staphylococcus aureus (MRSA) causes life-threatening infections in both community and hospital settings and is a leading cause of healthcare-associated infections (HAIs). We sought to describe the molecular epidemiological landscape of patients with MRSA bloodstream infections (BSIs) at an urban medical center by evaluating the clinical characteristics associated with the two dominant endemic clones.MethodsComprehensive clinical data extraction from the electronic health records of 227 hospitalized patients ≥18 years old with MRSA BSI over a 33-month period in New York City were collected. The descriptive epidemiology and mortality associated with the two dominant clones was compared using logistic regression.ResultsMolecular analysis revealed that 91% of all single-patient MRSA BSIs were due to two equally represented genotypes, clonal complex (CC) 5 (N=117) and CC8 (N=110). MRSA BSIs were associated with a 90-day mortality of 27%. CC8 caused disease more frequently in younger age groups (56 ± 17 vs 67 ± 17 years old; p<0.001) and in non-White race (OR=3.45 95% CI [1.51-7.87]; p=0.003), with few other major distinguishing features. Morbidity and mortality also did not differ significantly between the two clones. CC8 caused BSIs more frequently in the setting of peripheral intravenous catheters (OR=5.96; 95% CI [1.51-23.50]; p=0.01).ConclusionThe clinical features distinguishing dominant MRSA clones continue to converge. The association of CC8 with peripheral intravenous catheter infections underscores the importance of classical community clones causing hospital-onset infections. Ongoing monitoring and analysis of the dynamic epidemiology of this endemic pathogen is crucial to inform management to prevent disease.

The Decrease in Healthcare-Associated Methicillin-Resistant Staphylococcus aureus Infections and Savings From Glycopeptide Use

2006 ◽  
Vol 27 (10) ◽  
pp. 1131-1132 ◽  
Author(s):  
Diler Coşkun ◽  
Jale Aytaç
Keyword(s):  
Staphylococcus Aureus ◽  
Infection Control ◽  
Methicillin Resistant Staphylococcus Aureus ◽  
Medical Center ◽  
Methicillin Resistant ◽  
Healthcare Associated

We evaluated changes in the rate of healthcare-associated methicillin-resistant Staphylococcus aureus (MRSA) infections and healthcare-associated S. aureus infections after implementation of infection control precautions and the effect of this on glycopeptide use and expenditures for glycopeptides in a private medical center in Turkey in the years 2000-2005. A striking decrease was obtained in the number of MRSA infections, and the expenditure for glycopeptide use also decreased

scholarly journals Peristomal infection after percutaneous endoscopic gastrostomy: a 7-year surveillance of 297 patients

2012 ◽  
Vol 49 (4) ◽  
pp. 255-258 ◽  
Author(s):  
Helena Duarte ◽  
Carla Santos ◽  
Manuel Luís Capelas ◽  
Jorge Fonseca
Keyword(s):  
Risk Factors ◽  
Staphylococcus Aureus ◽  
Antibiotic Prophylaxis ◽  
Percutaneous Endoscopic Gastrostomy ◽  
Infection Rates ◽  
Healthcare Associated Infection ◽  
Methicillin Resistant ◽  
Endoscopic Gastrostomy ◽  
Peristomal Infection ◽  
Healthcare Associated

CONTEXT: Healthcare-associated infection represents the most frequent adverse event during care delivery. Medical advances like percutaneous endoscopic gastrostomy have brought improvement on quality of life to patients but an increased risk of healthcare-associated infection. Predictive risk factors for peristomal wound infection are largely unknown but evidence suggests that antibiotic prophylaxis and preventive strategies related to infection control may reduce infection rates. OBJECTIVES: The primary aim was to evaluate the global prevalence rate of peristomal infection. Secondary objectives were to characterise the positive culture results, to evaluate the prophylactic antibiotic protocol and to identify potential risk factors for peristomal infection. METHODS: Retrospective study of 297 patients with percutaneous endoscopic gastrostomy performed at a general hospital between January 2004 and September 2010. Patients received prophylactic cefazolin before the endoscopic gastrostomy procedure. Medical records were reviewed for demographic data, underling disease conditions to percutaneous endoscopic gastrostomy and patient potential intrinsic risk factors. Statistical analysis was made with the statistical program SPSS 17.0. RESULTS: A total of 297 percutaneous endoscopic gastrostomy tubes were inserted. Wound infection occurred in 36 patients (12.1%). Staphylococcus aureus methicillin resistant was the most frequently isolated microorganism (33.3%) followed by Pseudomonas aeruginosa (30.6%). The incidence rate had been rising each year and differ from 4.65% in 2004/2007 to 17.9% in 2008/2010. This finding was consistent with the increasing of prevalence global infection rates of the hospital. Most of the infections (55.6%) were detected in the first 10 days post procedure. There was no significant difference in age, body mass index values, mean survival time and duration of percutaneous endoscopic gastrostomy feeding between patients with and without periostomal infection. Institutional factors, namely global prevalence infection rates and the endemic character of Staphylococcus aureus methicillin resistant, play an important role in peristomal infection rates. Traditional antibiotic prophylaxis with cefazolin is not adequate due to the prevalence of resistant organisms. CONCLUSIONS: Peristomal infection is a frequent problem with clinical impact in percutaneous endoscopic gastrostomy patients and should be considered a healthcare associated infection. The antimicrobial prophylaxis regimens using cephalosporins are not adequate and need to be reviewed due to the high prevalence of Staphylococcus aureus methicillin resistant and other resistant organisms in hospitals and nursing homes.

Changing Epidemiology of Community-Onset Methicillin-Resistant Staphylococcus aureus Bacteremia

2003 ◽  
Vol 24 (6) ◽  
pp. 431-435 ◽  
Author(s):  
Leonard B. Johnson ◽  
Arti Bhan ◽  
Joan Pawlak ◽  
Odette Manzor ◽  
Louis D. Saravolatz
Keyword(s):  
Risk Factors ◽  
Staphylococcus Aureus ◽  
Electric Fields ◽  
Medical Center ◽  
Academic Medical Center ◽  
Care Facility ◽  
Retrospective Case ◽  
Term Care ◽  
Methicillin Resistant ◽  
Community Onset

AbstractObjectives:To review cases of community-onset Staphylococcus aureus bacteremia and to evaluate whether the risk factors and epidemiology of methicillin-resistant S. aureus (MRSA) bacteremia have changed from early reports.Design:Retrospective case-comparison study of community-onset MRSA (n - 26) and methicillin-susceptible S. aureus (MSSA) (n = 26) bacteremias at our institution.Setting:A 600-bed urban academic medical center.Patients:Twenty-six patients with community-onset MRSA bacteremia were compared with 26 patients with community-onset MSSA bacteremia. Molecular analysis was performed on S. aureus isolates from the 26 MRSA cases as well as from 13 cases of community-onset S. aureus bacteremia from 1980 and 9 cases of nosocomial S. aureus bacteremia from 2001.Results:The two groups were similar except that patients with MRSA bacteremia were more likely to have presented from a long-term-care facility (26.9% vs 4%; P = .05) and to have had multiple admissions within the preceding year (46% vs 15%; P = .03). Clamped homogeneous electric fields analysis of MRSA isolates from 1982 revealed predominantly that one clone was the epidemic strain, whereas there were 14 unique strains among current community-onset isolates. Among current nosocomial isolates, 3 patterns were identified, all of which were present in the community-onset cases.Conclusions:Previously described risk factors for MRSA acquisition may not be helpful in predicting disease due to the polyclonal spread of MRSA in the community. Unlike early outbreaks of MRSA in patients presenting from the community, current acquisition appears to be polyclonal and is usually related to contact with the healthcare system.

Methicillin-Resistant Staphylococcus aureus Bacteremia in Patients With End-Stage Renal Disease in Taiwan: Distinguishing Between Community-Associated and Healthcare-Associated Strains

2009 ◽  
Vol 30 (1) ◽  
pp. 89-92 ◽  
Author(s):  
Chung-Chih Lin ◽  
Jiun-Ling Wang ◽  
Chi-Ying Lin ◽  
Shey-Ying Chen ◽  
Jann-Tay Wang ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Renal Disease ◽  
End Stage Renal Disease ◽  
Medical Center ◽  
Methicillin Resistant ◽  
Staphylococcus Aureus Bacteremia ◽  
Mrsa Strains ◽  
Stage Renal Disease ◽  
End Stage ◽  
Healthcare Associated

We reviewed genotyping and medical records of 53 patients with end-stage renal disease and methicillin-resistant Staphylococcus aureus (MRSA) bacteremia in a medical center in Taiwan. In multivariate analysis, hospitalization within the previous year was independently negatively associated with infection with community-associated MRSA strains, and an increased number of years of dialysis predicted the recovery of patients infected with community-associated MRSA strains.

Incidence and Epidemiology of Methicillin-Resistant Staphylococcus aureus Infection in a Saudi Arabian Hospital, 1999-2003

2006 ◽  
Vol 27 (10) ◽  
pp. 1137-1139 ◽  
Author(s):  
Jaffar A. Al-Tawfiq
Keyword(s):  
Staphylococcus Aureus ◽  
Nosocomial Infection ◽  
Methicillin Resistant Staphylococcus Aureus ◽  
Saudi Arabian ◽  
The Other ◽  
Healthcare Associated Infection ◽  
Methicillin Resistant ◽  
Aureus Infection ◽  
Healthcare Associated ◽  
Community Acquired Infection

During 1999-2003 in a Saudi Arabian Hospital, methicillin-resistant Staphylococcus aureus constituted 6% of all S. aureus isolates; the proportion had increased from 2% in 1999, to 9.7% in 2002, to 8% in 2003. Of all MRSA isolates, 62% represented community-acquired infection, 20.4% represented healthcare-associated infection, and 17.6% represented nosocomial infection. The proportion of community-acquired isolates increased from 41.7% in 1999 to 66.6% in 2002, and the proportion representing nosocomial infection decreased from 33% in 1999 to 19% in 2003. Isolates representing nosocomial infection showed higher rates of resistance to ciprofloxacin (76.6%), clindamycin (76.6%), erythromycin (68%) and trimethoprim-sulfamethoxazole (68%) than did isolates in the other categories (P<.001).

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