Twenty-four outbreaks of nosocomial bloodstream infection (BSI) were investigated by the Centers for Disease Control from Jan 1, 1977 to Dec 31, 1987. Intravascular pressure monitoring devices (transducers) were the most commonly identified source of bacterial and fungal BSI outbreaks and were implicated as the source of infection in eight (33%) outbreaks. These included outbreaks caused by Candida parapsilosis (2), Serratia marcescens (2), Klebsiella oxytoca (1), Pseudomonas cepacia (1), Acinetobacter calcoaceticus (1), and one polymicrobial bacteremia outbreak due to Acinetobacter, Pseudomonas, Citrobacter, and Enterobacter species. In all eight outbreaks, reusable transducers improperly disinfected or fitted with domes that had been improperly sterilized served as reservoirs for the organism. Compared with nosocomial BSI outbreaks not related to transducers, those in which transducers were implicated as a reservoir involved a larger mean number of patients (24 v 9; P = 0.007), and were significantly more likely to involve intensive care unit patients (23/24 v 3/9; P = 0.025) and to have a longer mean duration (11 v 3 months; P= 0.007). These findings show that the characteristics of transducer- and non-transducer-related BSI outbreaks differ, and that centers using intravascular pressuremonitoring devices must be aware of and implement recommended infection control strategies for care and maintenance of these devices.

A cost-benefit analysis was used to assess four strategies to prevent catheter-associated urinary tract infections in an acute care setting. Routine use of catheters with sealed collection junctions, selective use of these catheters, and oral antibiotic prophylaxis all result in fewer deaths, fewer infections, and lower overall costs than not using any of these. Routine use of sealed junction catheters results in fewer infections and deaths than does selective use. When the cost of a nosocomial urinary tract infection is $500, routine use of sealed junction catheters is also less expensive than selective use in many circumstances. Oral antibiotic prophylaxis would result in the lowest net cost and the fewest deaths and infections, if it were as effective as parenteral prophylaxis, if more than 72% of patients received it, and if important negative factors such as selection of antimicrobial resistance and adverse drug reactions are not considered. When there is no extra cost of sealed junction catheters, their use is less expensive than the oral prophylaxis strategy if the total cost of oral prophylaxis, including the cost of adverse reactions, is greater than $15. If the extra cost of sealed junction catheters is $4 per unit, their use is less expensive than oral prophylaxis when its cost exceeds $35. Prevention of catheter-associated urinary tract infection reduces the overall cost of patient care, even when the prevention itself incurs costs. This analysis supports the routine use of sealed junction catheters in most acute care situations that require indwelling catheter drainage. Currently, we do not recommend routine antibiotic prophylaxis.

We reviewed 402 hospital admissions of patients with acute leukemia to define the frequency and characteristics of anaerobic bacteremia in this patient population. Six (5.2%) of the 116 septicemia episodes documented in these patients were caused by anaerobes (Bacteroides species, 3; Fusobacterium species, 2; and Clostridium tertium, 1); two of these episodes were polymicrobial. Five patients had had prior bacteremia. All six patients were receiving broad-spectrum antibiotics, including an anti-pseu-domonal penicillin, at the time of the episode. In each instance, the absolute granulocyte count was 0/mm3. Five patients had clinically apparent sources of infection, including perirectal abscess, gastrointestinal bleeding, or Clostridium difficile- associated diarrhea. Anaerobic bacteremia is an infrequent occurrence in granulocytopenic patients with acute leukemia, but may occur when there is obvious disruption of normal gastrointestinal anatomic barriers.

The epidemiology of influenza in the hospital is frequently confounded by failure to separate community-acquired from nosocomial transmission. An 83-year-old woman was hospitalized one day after returning from Asia with complications resulting from acute influenza A (H3N2) infection; she was the first culture-confirmed case in the region during the 1987-1988 influenza season, and her illness antedated other influenza cases in the area by at least four weeks. The patient shed virus at least four days after admission and transmitted influenza to her primary physician; both had received trivalent influenza vaccine four weeks earlier. Surveillance data from the 28 health care providers (HCPs) in contact with the index case (mean age: 34.5 years; median time of contact: four hours, none receiving vaccine) revealed no evidence of transmission as detected by paired type-specific complement-fixation antibodies and throat culture (20 subjects) or acute serologies and culture (7 subjects). No febrile respiratory illnesses were detected among other patients on the same ward, although three were reported among HCPs. Thus, neither secondary spread of influenza from infected patient to hospital HCPs nor nosocomial transmission apparently took place, although transmission did occur to the primary physician.

In Poland, uniform guidelines for prevention and control of nosocomial infections are not obligatory. Hospitals apply the general rules suggested by the Ministry of Health and Social Welfare, and the State Institute of Hygiene. Data from available literature and personal experience are also applied. In this review the etiology and frequency of hospital infections are described and the problems of infection control and hospital infections are emphasized. Measures taken to prevent nosocomial infectious are presented.

In vitro diagnostic products (IVDs) for infectious diseases are becoming available commercially at an ever-increasing rate. Aggressive marketing of such products often creates pressure on the laboratory to use IVDs, sometimes even before independent evaluations can be published in peer-reviewed scientific journals.

IVDs potentially offer simplicity and speed, particularly in detecting microorganisms that have fastidious growth requirements or that are simply not cultivable with currently available methodology. In some instances, IVDs may obviate the need for culture of more common microorganisms and may thereby allow testing to be done in physicians' offices and perhaps ultimately in the home.

Handwashing has longbeen recognized as the main way to prevent the spread of infectious agents. For routine handwashing in hospitals and clinics, antimicrobial agents are probably not needed. However, in certain high-risk situations it makes sense to use an antimicrobial agent to remove transient and reduce resident microorganisms.

Alcohol has been described as the “gold standard” for surgical skin preparations it will kill gram-positive and gram-negative bacteria, Myt obacterium tuberculosis, fungi, and many viruses. Alcohol is colorless, has its own cleaning action, and evaporates quickly from the skin.