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L C Thuler

Publications and source records attributed to L C Thuler.

14 recordsLinked to original sources
PubMed2000

Epidemiology of bloodstream infections at a cancer center.

CONTEXT: Cancer patients are at unusually high risk for developing bloodstream infections (BSI), which are a major cause of in-hospital morbidity and mortality. OBJECTIVE: To describe the epidemiological characteristics and the etiology of BSI in cancer patients. DESIGN: Descriptive study. SETTING: Terciary Oncology Care Center. PARTICIPANTS: During a 24-month period all hospitalized patients with clinically significant BSI were evaluated in relation to several clinical and demographic factors. RESULTS: The study enrolled 435 episodes of BSI (349 patients). The majority of the episodes occurred among non-neutropenic patients (58.6%) and in those younger than 40 years (58.2%). There was a higher occurrence of unimicrobial infections (74.9%), nosocomial episodes (68.3%) and of those of undetermined origin (52.8%). Central venous catheters (CVC) were present in 63.2% of the episodes. Overall, the commonest isolates from blood in patients with hematology diseases and solid tumors were staphylococci (32% and 34.7%, respectively). There were 70 episodes of fungemia with a predominance of Candida albicans organisms (50.6%). Fungi were identified in 52.5% of persistent BSI and in 91.4% of patients with CVC. Gram-negative bacilli prompted the CVC removal in 45.5% of the episodes. Oxacillin resistance was detected in 26.3% of Staphylococcus aureus isolates and in 61.8% of coagulase-negative Staphylococcus. Vancomycin-resistant enterococci were not observed. Initial empirical antimicrobial therapy was considered appropriate in 60.5% of the cases. CONCLUSION: The identification of the microbiology profile of BSI and the recognition of possible risk factors in high-risk cancer patients may help in planning and conducting more effective infection control and preventive measures, and may also allow further analytical studies for reducing severe infectious complications in such groups of patients.

Adolescent↗
PubMed1998

Risk factors for bloodstream infections at a cancer center.

A hospital-based matched case-control study was conducted in order to identify risk factors for the development of bloodstream infections in adult hospitalized patients. Between January 1993 and December 1994, 264 episodes of bloodstream infection were evaluated. Significant variables identified by univariate analysis were included in a multivariate model that showed that central venous catheter [odds ratio (OR), 6.71], poor performance status (OR, 3.40), weight loss (OR, 2.47), hematologic diseases (OR, 2.24), and previous antimicrobial therapy (OR, 2.12) independently influenced the outcome. The knowledge of modifiable risk factors is useful in the development of strategies that may contribute to the prevention of bloodstream infections.

Adolescent↗
PubMed1998

Risk index for prediction of surgical site infection after oncology operations.

INTRODUCTION: Several studies have shown that surgical site infections represent most hospital-acquired infections, with the major impact being on average hospital stay and cost of hospitalization. METHODS: To develop a risk model for prediction of surgical site infections in cancer patients undergoing operative procedures and identify those with high probability of infection we performed a prospective cohort study in a tertiary cancer care hospital in Rio de Janeiro, Brazil. Risk factors were studied in single and multivariate analyses. RESULTS: Over a 24-month period, 1205 patients underwent operations for malignant disease. The overall surgical site infection rate was 17.3%. A multivariate stepwise logistic regression model identified six independent predictive risk factors: contaminated and infected operations, surgical duration greater than 280 minutes, male sex, prior radiotherapy, American Society of Anesthesiology class III to V, and antimicrobial prophylaxis not according to protocol. On the basis of individual risk scores, two groups of patients were identified: a low-risk (score < or = 8; surgical site infection rate 10%) and a high-risk group (score > or = 9; surgical site infection rate 33.6%; relative risk 3.4; 95% confidence interval 2.6 to 4.4). CONCLUSION: The oncology risk model allowed for the identification of a high-risk score group of patients and implementation of a more efficient and selective intervention program.

Brazil↗
PubMed1998

An outbreak of Bacillus species in a cancer hospital.

Bacillus species were recovered from the blood cultures of 39 oncology patients over 14 weeks. A matched case-control study showed a strong association of Bacillus species bacteremia with use of calcium gluconate solution (odds ratio=25.0) and of central venous lines (odds ratio=8.8). Stopping use of the implicated calcium gluconate vials controlled the outbreak.

Adolescent↗
PubMed1998

[Mortality descriptors in HIV inpatients].

OBJECTIVE: To assess the clinical-epidemiological descriptors of inpatient mortality in persons infected with the human immunodeficiency virus (HIV). METHOD: All adult HIV/AIDS patients hospitalized at a university hospital in 1990, 1992 and 1994 were studied retrospectively. Descriptive statistics for all variables of interest were generated. Chi-square test and Fisher's exact test were performed to compare categorical variables. Means were compared using the Student t test. Stepwise logistic regression was used to identify the odds of dying associated with each risk factor. RESULTS: Two hundred and forty patients were included in the study. Between 1990 and 1994 the mean age rose from 35 to 36.9 years, the male/female ratio decreased from 9.8 to 2.0, the non-white proportion increased from 18.5 to 41.3% and the mean time between detection of HIV infection and hospitalization rose from 0.7 to 2.5 years. In addition, length of stay dropped from 31.3 to 25.3 days and the proportion of patients being followed up in the outpatient clinic of the University Hospital increased from 47.8 to 83.3%. Respiratory infections were the main cause of hospitalization (58.0%). Oral candidiasis (27.1%), tuberculosis (18.3%). Pneumocystis carinii pneumonia (15.4%) and toxoplasmic encephalitis (10.4%) were the most frequent opportunistic infections. Multivariate analysis showed that the factors associated with a worse outcome included the length of stay less than or equal to 7 days (Odds Ratio [OR] = 3.88; p = 0.02) and no outpatient follow-up at the Hospital (OR = 3.29; p = 0.01). CONCLUSION: Identification of independent risk factors for death may help in the implementation of more efficient interventions directed towards inpatients with HIV/AIDS.

AIDS-Related Opportunistic Infections↗
PubMed1997

HTLV-I and HTLV-II infections in hematologic disorder patients, cancer patients, and healthy individuals from Rio de Janeiro, Brazil.

To clarify the seroprevalence of human T-cell lymphotropic virus type I (HTLV-I) among hematologic and cancer patients in the State of Rio de Janeiro, Brazil, we investigated sera from 2430 individuals from the following groups: 152 patients with T-cell diseases, 250 with B-cell disorders, 67 with myeloid leukemia, 41 with Hodgkin's disease, 351 with a history of multiple blood transfusions, 235 patients with solid tumors of different types, and 109 family members of HTLV-I-infected patients. Antibodies to HTLV-I were screened by enzyme-linked immunosorbent assay or particle agglutination assays (or both). Repeatedly reactive samples were tested by Western blot and polymerase chain reaction assay to differentiate HTLV-I from HTLV-II. We found an increased seroprevalence rate of HTLV-I among those with lymphoid malignancies, mainly in T-cell diseases (28.9%), and these results were important in characterizing 44 cases of adult T-cell leukemia/lymphoma. We confirmed the presence of HTLV-I and HTLV-II infections in blood donors (0.4% and 0.1%, respectively), in patients exposed to multiple blood transfusions (10.2% and 0.8%, respectively), and in 30 (27.5%) of 109 family members of HTLV-I- or HTLV-II-infected patients. We also confirmed the high rate occurrence of adult T-cell leukemia/lymphoma among lymphoproliferative disorders in Rio de Janeiro, Brazil.

Adolescent↗
PubMed1997

Nosocomial infections in an oncology intensive care unit.

INTRODUCTION: Treatment of cancer has contributed to a growing number of immunocompromised patients with life-threatening nosocomial infections (NI). High mortality with considerable cost is observed when they are admitted to the intensive care unit (ICU). Few studies on infection control and surveillance have been undertaken in this population group. METHODS: All patients treated at a six-bed medical-surgical oncology ICU for > 48 hours were prospectively observed for the development of an NI and the influence of device utilization on infection rates. The analysis used the standard definitions of the National Nosocomial Infection Surveillance System Intensive Care Unit surveillance component. RESULTS: From September 1993 through November 1995, 370 infections occurred in 623 patients during 4034 patient-days, for an overall rate of 50.0 per 100 patients or 91.7 per 1000 patient-days. Pneumonia (28.9%), urinary tract infections (25.6%), and bloodstream infections (24.1%) were the main types of infection. The most common microorganisms isolated were Enterobacteriaceae (29.7%), fungi (22.2%), and Pseudomonas aeruginosa (13.2%). The median device utilization ratios were 0.63, 0.83, and 0.86 for ventilator, indwelling urinary catheter, and central venous catheter, respectively. The highest median device-specific associated infection rate was 41.7 for ventilator. The median for the average length of stay was 8.8 days, and the average severity of illness score was 4.0. There was a strong positive correlation between the overall NI patient rate and device utilization (r = 0.56, p < 0.01), average severity of illness score (r = 0.54, p < 0.01), and average length of stay (r = 0.67, p < 0.01). No correlations were statistically significant when patient-days were used in the denominator. Among the devices only the number of central venous catheter days was significantly correlated with infections (r = 0.51, p = 0.01). The NI patient-day rates were progressively higher the longer the patients stayed in the ICU. CONCLUSIONS: The high rates reported in this study may reflect a combination of several factors related to the underlying illness, neutrophil count, and exposure to invasive procedures. The adjusted infection rates described here provide specific surveillance data for further interhospital comparisons and also to assess the influence of invasive medical interventions, allowing the implementation of preventable measures to control infections.

Brazil↗
PubMed1997

Impact of a false positive blood culture result on the management of febrile children.

OBJECTIVE: To evaluate the impact of a preliminary positive blood culture result, subsequently confirmed to be a false positive blood culture result on rate of hospitalization, antibiotic therapy and use of microbiologic tests. DESIGN: Retrospective chart review. PATIENTS AND METHODS: Children between 1 month and 18 years old on whom a blood culture was performed were eligible, excluding those with an underlying condition for whom a false positive blood culture may be difficult to assess. During the 1-year study period 9959 blood cultures were performed of which 778 (7.8%) produced growth. Charts of 81 patients with a false positive blood culture were reviewed and compared with those of 162 patients with a true negative blood culture. Patients already hospitalized when blood culture was drawn (n = 24) were analyzed separately from those who were not (n = 219). Among these, patients were divided into those who were followed as outpatients (n = 104) and hospitalized (n = 115). RESULTS: Both groups (false positive vs. true negative) were comparable for age, sex, temperature at consultation, white blood cell count and illness severity. Twenty-six percent of patients followed as outpatients who had a false positive blood culture were hospitalized because of a preliminary positive blood culture result. Among patients hospitalized at the initial assessment, the frequency of antibiotic therapy (91% vs. 71%, P < 0.01), the frequency of use of intravenous antibiotics (80% vs. 58%, P < 0.01) and the percentage of unwarranted antibiotic prescription (13% vs. 0%, P < 0.01) were significantly greater in the false positive group than in the true negative group. The same results were found for each of these outcomes among the group of patients followed as outpatients (61% vs. 28%, P < 0.01, 17% vs. 0%, P < 0.01 and 39% vs. 0%, P < 0.01) for false positive vs. true negative, respectively. Patients with false positive blood cultures had more blood cultures drawn subsequently (P < 0.01). Children already hospitalized when the blood culture was obtained did not show significant differences in main outcomes. CONCLUSIONS: False positive blood culture results generate unnecessary hospitalizations, antibiotic therapy and use of microbiologic tests.

Adolescent↗
PubMed1997

Fungaemia caused by Hansenula anomala--an outbreak in a cancer hospital.

Yeasts belonging to the genus Hansenula are rarely encountered as the cause of infection in clinical practice. A wide spectrum of infections caused by these fungi can be seen, ranging from asymptomatic fungaemia to severe disease. We describe an outbreak of 24 cases of infection due to H. anomala in an oncological hospital in Rio de Janeiro, Brazil. The median age of the patients was 11 years, of whom 54.2% were female; 91.7% of the Hansenula fungaemia occurred in the haematology unit. The most frequent primary disease diagnosis was leukaemia (62.5%), and all of those infected had had a central venous catheter or peripheral venous catheter and had been treated previously with broad-spectrum antibiotics. Numerous other risk factors were observed in our cases: previous use of steroids, chemotherapy, radiation therapy and neutropenia (data not shown). No deaths could be attributed to Hansenula.

Brazil↗
PubMed1996

Risk factors for infectious complications after abdominal surgery for malignant disease.

BACKGROUND: The emergence of nosocomial infection as a serious complication after intraabdominal operations for cancer prompted us to identify major independent risk factors associated with postoperative infection. METHODS: Risk factors were studied in single and multivariate analyses. Variables considered were remote infection, antimicrobial prophylaxis, preoperative stay, chemotherapy, radiotherapy, weight loss, elective versus emergency operation, wound class, duration of operation, drains, sex, age, and physical status. RESULTS: During 24 months, 236 patients were entered in the study. The overall postoperative infection rate was 45.7%; the surgical site infection rate was 22.4%. Multivariate analysis identified three independent variables: duration of operation longer than 5 hours (odds ratio 6.41, 95% confidence interval 3.28 to 12.54), presence of remote infection at operation (odds ratio 3.76, 95% confidence interval 1.76 to 8.03), and preoperative stay longer than 22 days (odds ratio 2.03, 95% confidence interval 1.04 to 3.95). The relative risk of infection increased from 3.0 when one risk factor was present to 7.3 when all three risk factors were present. CONCLUSIONS: The predictive power of our final multivariate risk index clearly groups these patients according to differing risk for postoperative infection. This classification contributes substantially to the effectiveness of infection control strategies to prevent the occurrence of postoperative infection in the high-risk population of patients with cancer.

Abdominal Neoplasms↗
PubMedDate not supplied

Determinants of mortality in oncology patients colonized or infected with Staphylococcus aureus.

Oxacillin-resistant Staphylococcus aureus (ORSA) infection is an important cause of hospital morbidity and mortality. The objective of this study was to identify the main factors associated with death in patients colonized or infected with Staphylococcus aureus in a cancer center. A matched-pair case-control study enrolled all patients infected or colonized with ORSA (cases) admitted to the Hospital do Câncer in Rio de Janeiro from 01/01/1992 to 12/31/1994. A control was defined as a patient hospitalized during the same period as the case-patients and colonized or infected with oxacillin-susceptible Staphylococcus aureus (OSSA). The study enrolled 95 cases and 95 controls. Patient distribution was similar for the two groups (p > or = 0.05) with respect to gender, underlying diseases, hospital transfer, prior infection, age, temperature, heart and respiratory rates, neutrophil count, and duration of hospitalization. Univariate analysis of putative risk factors associated with mortality showed the following significant variables: admission to the intensive care unit (ICU), presence of bacteremia, use of central venous catheter (CVC), ORSA colonization or infection, pneumonia, use of urinary catheter, primary lung infection, prior use of antibiotics, mucositis, and absence of cutaneous abscesses. Multivariate analysis showed a strong association between mortality and the following independent variables: admission to ICU (OR [odds ratio] = 7.2), presence of Staphylococcus bacteremia (OR = 6.8), presence of CVC (OR = 5.3), and isolation of ORSA (OR = 2.7). The study suggests a higher virulence of ORSA in comparison to OSSA in cancer patients.

Catheterization, Central Venous↗
PubMedDate not supplied

[Risk factors for surgical wound infection development in head and neck cancer surgery].

Over a period of 24 months, patients undergoing surgical procedures for head and neck cancer at the Cancer Hospital in Rio de Janeiro, Brazil were followed-up prospectively for identification of surgical wound risk factors. A total of 273 patients fulfilling the National Nosocomial Infection Surveillance (NNIS) surgical criteria completed the analysis. The overall wound infection rate was 25.3%. Of the 11 potential risk factors for postoperative wound infections analysed by stepwise multiple logistic regression, the five variables that were independent of each other and highly predictive were patient undergoing an operation classified as either contaminated or infected, a surgery lasting longer than 5 hours, an American Society of Anesthesiologist (ASA) preoperative assessment score of 4 and 5, age over 50 years and prior radiotherapy. The preoperative stay, antibiotic prophylaxis, surgical drains, preoperative nutritional status, sex and the presence of prior infection did not have an independent significant contribution to the risk of infection. This study reports specific risk factors for head and neck cancer surgeries and contributes substantially to the effectiveness of infection control strategies to prevent their occurrence in this high-risk group of patients.

Adolescent↗
PubMedDate not supplied

[Antibiotic prophylaxis in oncologic surgery].

Perioperative antibiotic administration can decrease surgical morbidity, shorten hospitalization, while lowering the overall costs attributable to infections. Its use in surgery is widespread and often inappropriate. In this study, the authors evaluate the guidelines for selection and use of prophylactic antibiotics in surgical cancer patients at the Hospital of Cancer in Rio de Janeiro, Brazil. During 36 non-consecutive months, 1681 cancer patients submitted to surgical procedures were prospectively followed-up by members of the Hospital Infection Control Committee. The overall surgical site infection (SSI) and mortality rates were 17.7% and 4.8% respectively. Prophylactic antibiotics were used in 1262 elective surgeries (75.1%), and their use was not considered to be in accordance with the recommended protocol in 37.6% of the cases. The inadequate antimicrobial prophylaxis resulted in higher incidence of SSI than did prophylaxis in according to the protocol (21.7% vs. 16.4, Relative Risk 1.32; 95% Confidence Internal 1.05-1.67; p0.01). This study calls the attention for the need of a more strict and determined educational program in order to provide mechanisms for an adequate administration of prophylactic antibiotics to patients submitted to high-risk surgeries.

Adolescent↗