BACKGROUND: We evaluated the effectiveness of isolation measures using cohorting rooms and antimicrobial use in reducing the isolation rate of methicillin-resistant Staphylococcus aureus (MRSA) and multidrug-resistant Acinetobacter baumannii (MDR-AB). METHODS: Four cohorting rooms (16 beds) for patients colonized or infected with multidrug-resistant organisms (MDRO) have been created in the general wards of our 894-bed hospital since October 2003. We prospectively evaluated the isolation rates of MRSA and MDR-AB, and amount of antimicrobial use during the 8-year study period. We also investigated the relationship between antimicrobial use density (AUD) and the isolation rates of MRSA and MDR-AB. RESULTS: After creating cohorting rooms, the isolation rates of MRSA decreased from 1.56 cases per 1,000 patient-days from 2004-2005 to 1.24 from 2006-2007 (P=0.57). The isolation rates of MDR-AB also decreased from 0.72 from 2004-2005 to 0.36 from 2010-2011 (P<0.01). The mean quarterly AUDs of glycopeptides and carbapenems were 30.17+/-6.80 and 19.5+/-7.10, respectively. There were no significant correlations between AUD values and the isolation rate of MRSA or MDR-AB. CONCLUSION: This study suggests that isolation measures using cohorting rooms to help limit the transmission of MDRO infection and colonization, especially MDR-AB, in resource-limited settings is feasible and efficacious.
Acinetobacter ; Acinetobacter baumannii ; Carbapenems ; Cohort Studies ; Colon ; Drug Resistance ; Glycopeptides ; Humans ; Methicillin Resistance ; Methicillin-Resistant Staphylococcus aureus ; Patient Isolation ; Patients' Rooms ; Prospective Studies

Staphylococcus saprophyticus is a common pathogen of acute urinary tract infection (UTI) in young females. However, S. saprophyticus bacteremia originating from UTI is very rare and has not been reported in Korea. We report a case of S. saprophyticus bacteremia from UTI in a 60-year-old female with a urinary stone treated successfully with intravenous ciprofloxacin, and review the cases of S. saprophyticus bacteremia reported in the literature. Thus, the microorganism may cause invasive infection and should be considered when S. saprophyticus is isolated from blood cultures in patients with UTI.
Bacteremia* ; Ciprofloxacin ; Female ; Humans ; Kidney Calculi ; Korea ; Middle Aged ; Staphylococcus saprophyticus* ; Staphylococcus* ; Urinary Calculi ; Urinary Tract Infections* ; Urinary Tract*

Spontaneous intracerebral hemorrhage (sICH) is one of the deadliest subtypes of stroke, and no treatment is currently available. One of the major risk factors is tobacco use. In this article, we review literature on how tobacco use affects the risk of sICH and also summarize the known effects of tobacco use on outcomes following sICH. Several studies demonstrate that the risk of sICH is higher in current cigarette smokers compared to non-smokers. The literature also establishes that cigarette smoking not only increases the risk of sICH but also increases hematoma growth, results in worse outcomes, and increases the risk of death from sICH. This review also discusses potential mechanisms activated by tobacco use which result in an increase in risk and severity of sICH. Exploring the underlying mechanisms may help alleviate the risk of sICH in tobacco users as well as may help better manage tobacco user sICH patients.

Fungal peritonitis in continuous ambulatory peritoneal dialysis (CAPD) patients is rare. But, it is a serious complication of CAPD because of high morbidity and mortality. It is very important to diagnose and treat such infections promptly, as otherwise it has a poor prognosis. We experienced a case of peritonitis in a CAPD patient that was caused by Aspergillus flavus detected by fungal balls in blood culture bottles and treated successfully by administering anti-fungal agents and removing the peritoneal dialysis catheter.
Aspergillus ; Aspergillus flavus ; Fungi ; Humans ; Peritoneal Dialysis ; Peritoneal Dialysis, Continuous Ambulatory ; Peritonitis ; Prognosis

The authors calculated the number of blood cultures per 1,000 admitted patient days at seven university-affiliated hospitals in 2010, which ranged from 65 to 129 (mean 110). The number of blood cultures per 1,000 patient days could possibly be a good parameter for assessing the appropriateness of blood culture.
Humans ; Korea ; Quality Control ; Sepsis

BACKGROUND: Optimal blood culture performance is critical for successful diagnosis and treatment of sepsis. To understand the status of blood culture, we investigated several aspects of the procedure at 9 university hospitals. METHODS: The process of ordering blood culture sets and sampling volume for adults and children was investigated from January 2010 to April 2010, while the positive rate of detection and growth of skin contaminants were compared in 2009. Microbial growth in aerobic and anaerobic bottles was investigated prospectively. RESULTS: A majority of the hospitals used 2 sets of bottles for adults and 1 bottle for children. The average blood volume in each set was 7.7 mL for adults and 2.1 mL for children. The positive rate of microorganisms was 8.0%, and the isolation rate of the normal flora of the skin was 2.1%. Bacterial growth rates in aerobic and anaerobic bottles only were 31.8% and 24.5% respectively. CONCLUSIONS: Ordering blood culture sets and sampling volumes did not comply with CLSI guidelines. However, the rate of positive cultures and skin contamination rates were acceptable. Anaerobic bottles are useful in enhancing the yield of microorganisms.
Adult ; Bacteremia/blood/*microbiology ; Bacteria, Aerobic/isolation & purification ; Bacteria, Anaerobic/isolation & purification ; Blood/microbiology ; Child ; Hospitals, University ; Humans ; Prospective Studies ; Republic of Korea ; Skin/microbiology

BACKGROUND: This study analysed patterns of requests for repeated blood cultures and the microorganisms isolated in follow-up cultures. METHODS: The frequencies and intervals of repeated blood cultures performed during January and February of 2010 at seven university-affiliated hospitals in Korea were evaluated. Results of microbiological cultures at follow-up were analysed with respect to pathogen replication, immune clearance, appearance of new pathogens, and skin contaminants. RESULTS: Among 3,072 patients who received repeated blood cultures, the average number of requests was 3.2. Of the 5,241 follow-up blood culture events recorded, durations of 1, 2, and 3 days between cultures were identified for 23.1%, 21.4%, and 15.0% of events, respectively. Relative to each initial culture, persistent pathogen growth in subsequent culture(s) accounted for 2.3% of events, whereas immune clearance was confirmed in 8.5% of events. Previously undetected pathogens were isolated in 5.2% of the follow-up cultures, the majority of which grew after an interval of six days. Skin contaminants were detected in 7.6% of the repeated cultures, and 76.1% of the follow-ups displayed no growth of microorganisms. CONCLUSION: The most common numbers of repeat culture requests were two and three, and these were typically performed within three days of the initial culture. Among the follow-up cultures, new pathogens were identified in 5.2%, and the majority of this group likely presented for follow-up during a new disease episode.
Follow-Up Studies ; Humans ; Korea ; Sepsis ; Skin

Roseomonas are a gram-negative bacteria species that have been isolated from environmental sources. Human Roseomonas infections typically occur in immunocompromised patients, most commonly as catheter-related bloodstream infections. However, Roseomonas infections are rarely reported in immunocompetent hosts. We report what we believe to be the first case in Korea of infectious spondylitis with bacteremia due to Roseomonas mucosa in an immunocompetent patient who had undergone vertebroplasty for compression fractures of his thoracic and lumbar spine.
Bacteremia* ; Fractures, Compression ; Gram-Negative Bacteria ; Humans ; Immunocompetence ; Immunocompromised Host ; Korea ; Methylobacteriaceae* ; Mucous Membrane* ; Spine ; Spondylitis* ; Vertebroplasty

BACKGROUND: Viridans streptococci is a major pathogen of infective endocarditis. This study was conducted in order to investigate the factors associated with infective endocarditis and predictors for three-month mortality among patients with viridans streptococcal bacteremia (VSB). MATERIALS AND METHODS: In this study, among 261 eligible patients diagnosed as VSB from January 2000 through June 2011 in a university-affiliated hospital, a retrospective analysis of 197 patients was conducted. All patients with VSB were classified into two groups according to sites of bacteremia; infective endocarditis and other infections. Demographic and clinical characteristics were reviewed through electronic medical records factors associated with infective endocarditis and predictors of three-month mortality in VSB patients were evaluated. RESULTS: Of the 197 patients, 37 (18.8%) patients had viridans streptococcal infective endocarditis (VSIE) and 160 (81.2%) patients had VSB due to other infection. In logistic regression analysis, underlying valvular heart disease (odds ratio [OR], 48.43; 95% confidence interval [CI], 5.77-406.38) and persistent bacteremia (OR, 46.32; 95% CI, 7.18-299.01) showed an independent association with VSIE. Three-month mortality rate was 21.7% in patients with VSB. In logistic regression analysis, previous steroid use (OR, 9.31; 95% CI, 1.34-64.52), previous immunosuppressive therapy (OR, 9.50; 95% CI, 2.13-42.30), hypotension at onset of bacteremia (OR, 7.72, 95% CI, 2.45-24.33), and Charlson comorbidity score > or =3 (OR, 4.53, 95% CI, 1.55-13.28) showed an independent association with three-month mortality in patients with VSB. CONCLUSIONS: VSB patients who have valvular heart disease or persistent bacteremia routinely require echocardiography. Previous steroid use, immunosuppressive therapy, hypotension, and higher Charlson comorbidity score suggested poor prognosis in patients with VSB.
Bacteremia ; Comorbidity ; Echocardiography ; Electronic Health Records ; Endocarditis ; Heart Valve Diseases ; Humans ; Hypotension ; Logistic Models ; Prognosis ; Retrospective Studies ; Viridans Streptococci

Bacillus licheniformis is an aerobic, gram-positive, spore-forming rod bacteria usually found in the environment. Infections with B. licheniformis are rare and usually associated with an immunocompromised state, trauma, and an indwelling catheter. We report a case of bacteremic B. licheniformis spondylitis following vertebroplasty in a patient with lung cancer.
Bacillus ; Bacteremia ; Bacteria ; Catheters, Indwelling ; Humans ; Lung ; Lung Neoplasms ; Spondylitis ; Vertebroplasty