Infection control experience in a cooperative care center for transplant patients.

OBJECTIVE: To characterize infection control experience during a 6.5-year period in a cooperative care center for transplant patients. DESIGN: Descriptive analysis. SETTING: A cooperative care center for transplanted patients, in which patients and care partners are housed in a homelike environment, and care partners assume responsibility for patient care duties. PATIENTS: Nine hundred ninety one transplant patients. METHODS: Infection control definitions from the Centers for Disease Control and Prevention were used to ascertain infection rates. Environmental cultures were used to detect methicillin-resistant Staphylococcus aureus (MRSA), vancomycin-resistant Enterococcus (VRE), Clostridium difficile, and fungi during the first 18 months. Surveillance cultures were performed for a subset of patients and care partners. RESULTS: From June 1999 through December 2005, there were 19,365 patient-days observed. The most common healthcare-associated infection encountered was intravascular catheter-related bloodstream infection, with infection rates of 5.74 and 4.94 cases per 1,000 patient-days for hematopoietic stem cell transplant (HSCT) and solid organ transplant (SOT) patients, respectively. C. difficile-associated diarrhea was observed more frequently in HSCT patients than in SOT patients (3.97 vs 0.57 cases per 1,000 patient-days; P < .0001). There was no evidence of environmental contamination with MRSA, VRE, or C. difficile. Acquisition of MRSA was not observed. Acquisition of VRE was documented. CONCLUSION: This study documented that cooperative care was associated with some risk of healthcare-associated infection, most notably intravascular catheter-associated bloodstream infection and C. difficile-associated diarrhea, it appears the incidences of these infections were roughly commensurate with those in other care settings.

Prospective, controlled, cross-over trial of alcohol-based hand gel in critical care units .

BACKGROUND: There are limited data from prospective studies to indicate whether improvement in hand hygiene associated with the use of alcohol-based hand hygiene products results in improved patient outcomes. DESIGN: A 2-year, prospective, controlled, cross-over trial of alcohol-based hand gel. SETTING: The study was conducted in 2 medical-surgical ICUs for adults, each with 12 beds, from August 2001 to September 2003 at a university-associated, tertiary care teaching hospital. METHODS: An alcohol-based hand gel was provided in one critical care unit and not provided in the other. After 1 year, the assignment was reversed. The hand hygiene adherence rate and the incidence of nosocomial infection were monitored. Samples for culture were obtained from nurses' hands every 2 months. RESULTS: During 17,994 minutes of observation, which included 3,678 opportunities for hand hygiene, adherence rates improved dramatically after the introduction of hand gel, increasing from 37% to 68% in one unit and from 38% to 69% in the other unit (P< .001). Improvement was observed among all groups of healthcare workers. Hand hygiene rates were better at higher workloads when hand gel was available in the unit (P= .02). No substantial change in the rates of device-associated infection, infection due to multidrug-resistant pathogens, or infection due to Clostridium difficile was observed. Culture of samples from the hands of nursing staff revealed that an increased number of microbes and an increased number of microbe species was associated with longer fingernails (ie, more than 2 mm long), the wearing of rings, and/or lack of access to hand gel. CONCLUSIONS: The introduction of alcohol-based gel resulted in a significant and sustained improvement in the rate of hand hygiene adherence. Fingernail length greater than 2 mm, wearing rings, and lack of access to hand gel were associated with increased microbial carriage on the hands. This improvement in the hand hygiene adherence rate was not associated with detectable changes in the incidence of healthcare-associated infection.

Outbreak of bloodstream infection temporally associated with the use of an intravascular needleless valve.

BACKGROUND: Needleless intravascular catheter connector valves have been introduced into clinical practice to minimize the risk of needlestick injury. However, infection-control risks associated with these valves may be underappreciated. In March 2005, a dramatic increase in bloodstream infections was noted in multiple patient care units of a hospital in temporal association with the introduction of a needleless valve into use. METHODS: Surveillance for primary bloodstream infection was conducted using standard methods throughout the hospital. Blood culture contamination rates were monitored. Cultures were performed using samples obtained from intravascular catheter connector valves. RESULTS: The relative risk of bloodstream infection for the time period in which the suspect connector valve was in use, compared with baseline, was 2.79 (95% confidence interval, 2.27-3.43). In critical care units, the rate of primary bloodstream infection increased with the introduction of the valve from 3.87 infections per 1000 catheter-days to 10.64 infections per 1000 catheter-days (P<.001), and it decreased to 5.59 infections per 1000 catheter-days (P=.02) in the 6 months following removal of the device from use. Similarly, in inpatient nursing units, the rate of bloodstream infection increased from 3.47 infections per 1000 catheter-days to 7.3 infections per 1000 catheter-days (P=.02) following introduction of the device, and it decreased to 2.88 infections per 1000 catheter-days (P=.57) following removal of the device from use. Similar events occurred in the cooperative care units. The rate of blood culture contamination did not substantially change over the course of the study. Of 37 valves that were subjected to microbiological sample testing, 24.3% yielded microbes, predominantly coagulase-negative staphylococci. CONCLUSION: A significant association between primary bloodstream infection and a needleless connector valve was observed. Evaluation of needleless connector valves should include a thorough assessment of infection risks in prospective randomized trials prior to their introduction to the market.

Designing a biocontainment unit to care for patients with serious communicable diseases: a consensus statement.

In spite of great advances in medicine, serious communicable diseases are a significant threat. Hospitals must be prepared to deal with patients who are infected with pathogens introduced by a bioterrorist act (e.g., smallpox), by a global emerging infectious disease (e.g., avian influenza, viral hemorrhagic fevers), or by a laboratory accident. One approach to hazardous infectious diseases in the hospital setting is a biocontainment patient care unit (BPCU). This article represents the consensus recommendations from a conference of civilian and military professionals involved in the various aspects of BPCUs. The role of these units in overall U.S. preparedness efforts is discussed. Technical issues, including medical care issues (e.g., diagnostic services, unit access); infection control issues (e.g., disinfection, personal protective equipment); facility design, structure, and construction features; and psychosocial and ethical issues, are summarized and addressed in detail in an appendix. The consensus recommendations are presented to standardize the planning, design, construction, and operation of BPCUs as one element of the U.S. preparedness effort.