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Query: UMLS:C0004610 (bacteremia)
 13,199 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Thirty-six febrile neutropenic episodes were treated by granulocyte transfusions in 33 children. Septicemia and mucous membrane ulcerations were most commonly associated with the fever. Infection cleared in 81% of the episodes, eight per cent ended in death from bacterial infections, 11% from nonbacterial infections or hemorrhage. The median number of polymorphonuclear leukocytes given was 1.1 X 10(10)/m2/transfusion. Two to twenty-eight (median 8.5) transfusions were given over 3--34 days (median 10.5). The source of cells (parental or random) and the method of collection did not seem to affect the outcome. None of the 23 patients whose marrow recovered during the transfusions died of bacterial infections. Infection cleared even without marrow recovery in 62% of the patients, but then only 25% lived for more than two months after clearing of sepsis. In a subgroup of patients with nonlymphoblastic leukemia on the same chemotherapy and antibiotic treatment protocol, 8/11 (73%) survived bacteremia when white cell support was available; only 2/11 (18%) of a historical control group survived when such support was not available. Granulocyte support appears to be a valuable tool in helping neutropenic patients overcome their infections or, at the very least, helping them survive long enough for normal marrow recovery to occur.
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PMID:Granulocyte transfusions in infected neutropenic children with malignancies. 44 Feb 6

In order to investigate the clinical value of peripheral white blood cell variables for the diagnosis of bacterial meningitis among young, febrile children, we compared total peripheral white counts, total segmented neutrophil counts, total band counts, and the ratio of immature-to-total neutrophils (I:T ratio) among 46 children with bacterial meningitis, 130 children with aseptic meningitis, and 56 febrile children with culture confirmed extrameningeal bacterial infection. Children with bacterial meningitis were comparable to those with aseptic meningitis with respect to median total white blood cell counts and median total segmented neutrophil counts but had a significantly higher median total band count (1760/microliters vs 378/microliters, P = 0.0001) and a significantly higher median I:T ratio (0.40 vs 0.09, P less than 0.001). In contrast, children with bacterial meningitis were comparable to those with an extrameningeal bacterial infection with respect to median total band count but had a significantly lower median total peripheral white count (10,650/microliters vs 15,300/microliters, P = 0.0013), a lower median total segmented neutrophil count (4511/microliters vs 6796/microliters, P = 0.023), and a significantly higher median I:T ratio (0.40 vs 0.15, P less than 0.001). Children with meningitis who were bacteremic at presentation had a significantly lower total white cell count (P = 0.001) and significantly higher I:T ratio (P = 0.005) when compared with children who had an extrameningeal infection and concurrent bacteremia at presentation.(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:Peripheral white blood cell counts and bacterial meningitis: implications regarding diagnostic efficacy in febrile children. 202 12

We describe a new rat model of chronic hyperdynamic sepsis. After control values for weight gain, and food and water intake of each animal were obtained over a 5-day period, male Sprague-Dawley rats weighing 370-425 g were anesthetized, catheterized to allow chronic cardiac-output measurements, and a sterile subcutaneous cavity was formed over the flank area. The animals were allowed a 3-4 day postoperative recovery period. Body weight, food and water intake, and cardiac output were measured daily. Frequent blood samples were withdrawn for bacterial cultures and white cell counts (WBC). On the third and, in some cases, the fourth postoperative day, the subcutaneous cavity was inoculated with 10(9) colony-forming units of Escherichia coli and Bacteroides fragilis. The resulting sepsis was characterized by loss of body weight in spite of normal food and water intake, increased cardiac output, increased WBC, intermittent bacteremia, decreased muscle mass, and decreased cross-sectional area of skeletal muscle myofibrils. Two levels of septic response emerged--moderate and severe. Based on the above-mentioned measurements, it was possible to categorize all long-term septic animals into these two groups. Both groups exhibited cardiac-output, body-weight, and WBC data significantly different from sham controls. Repeated inoculations of the subcutaneous abscess initiated on the third postoperative day resulted in moderate sepsis with no long-term mortality, severe sepsis with 23% mortality over a 3-week period, or a 100% mortality within 4 days, depending on the virulence of the E. coli organisms used. The new model is ideally suited for pathophysiologic studies of sustained, hyperdynamic sepsis.
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PMID:Chronic hyperdynamic sepsis in the rat: I. Characterization of the animal model. 304 69

The optimal frequency for changing pressure monitoring tubing and flush solution that minimizes catheter-related infection and contains cost has not yet been established. We conducted a pilot study to examine the effects of three protocols on catheter-related infection: group I, change of flush solution and pressure monitoring tubing every 24 hours; group II, change of flush solution every 24 hours and change of pressure monitoring tubing every 48 hours; group III, change of flush solution and pressure monitoring tubing every 48 hours. Thirty critically ill patients were randomly assigned to one of the three protocols. Semiquantitative cultures of the solution from the flush bag and catheter tip were obtained. Intervening variables were documented: duration of cannulization, number of entries into the system, presence of other invasive devices, white cell count, patient's temperature, presence of preexisting infection, patient's age and diagnosis, use of steroids and antibiotics, and host risk factors for immunocompromise. All flush solution cultures were negative for growth. Incidence of catheter-related bacteremia was zero. The cultures of four catheter tips were positive for Staphylococcus epidermidis; none in group I, three in group II, and one in group III. The results of this pilot study suggest that there is no difference in the incidence of catheter-related infection whether the change interval for flush solution and pressure monitoring solution is 24 or 48 hours. However, further study with a larger sample is needed.
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PMID:Infection related to intravascular pressure monitoring: effects of flush and tubing changes. 319 80

Responses to bacteremia include fever, leukocytosis, elaboration of acute-phase proteins, hypoferremia, and increased protein catabolism. To evaluate the role of prostaglandins in the mediation of these responses, the effects of intravenous ibuprofen (12.5 mg/kg X dose) were studied in eight dogs infused with live Escherichia coli. Thirteen dogs served as noninfected controls. Two of the eight animals that received ibuprofen died during the study, whereas all control animals with sepsis survived. Prostaglandin inhibition prevented the rise in temperature resulting from sepsis, while alterations in white cell count, C-reactive protein, and serum iron levels were unaffected. In addition, protein catabolism appeared to be similar in both groups. This minimal metabolic effect coupled with observed renal side effects makes the use of nonsteroidal, anti-inflammatory agents in sepsis of questionable benefit.
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PMID:Limited effects of prostaglandin inhibitors in Escherichia coli sepsis. 389 41

Seventeen episodes of persistent Staphylococcus epidermidis bacteremia (one to nine days) occurred in 16 patients with vascular catheters during a 26-month period. Cases were statistically more likely to have a longer hospitalization (54 v 7.6 days, p less than .0005), longer duration of antibiotic therapy (22 v 2.5 days, p = .002), presence of a central venous pressure (CVP) catheter (14 v 2, p less than 3 X 10(-8), and presence of an arterial catheter (4 v 1, p = 0.037) than randomly selected hospitalized patients matched for age, sex, and date of admission. However, when cases were compared with similarly matched non-bacteremic patients having CVP catheters, these characteristics were not significantly different in the two groups. Furthermore, exposure to total parenteral nutrition (TPN) and duration of TPN were not significantly different between cases and controls. Hence, the presence of a CVP catheter appeared to be the major risk factor for S. epidermidis bacteremia. In 16 episodes, patients had temperature greater than 38.6 degrees C without another identifiable cause, and the average white cell count for the case group was 19,400/mm.3 Seven patients also had diaphoresis, confusion, hypotension, or oliguria. Temperatures returned to normal in 13 within 24 hours after catheter removal, and all patients were afebrile and symptom-free within 72 hours. Thus, vascular catheter-associated S. epidermidis bacteremia was an important case of febrile morbidity in these patients.
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PMID:Staphylococcus epidermidis bacteremia associated with vascular catheters: an important cause of febrile morbidity in hospitalized patients. 656 80

Thirty-one patients were randomized during 39 episodes of bleeding to receive either 1 g of intravenous cefotaxime (19 patients) or no antibiotic (20 patients) immediately before emergency endoscopic sclerotherapy. Blood was obtained for culture before and at 5 minutes, 4 hours, and 24 hours after the procedure. Specimens for culture were taken from the endoscope tip and channel, water bottle, and injection needle after sclerotherapy. When ascites was present (5 patients in the antibiotic group, 7 in the control group), fluid was obtained by paracentesis before endoscopy and at 4 and 24 hours. Bacteremia occurred in 1 of 19 patients in the antibiotic group (5.3%), compared with 6 of 19 in the control group (31.6%; p = .04). The cultured organisms were oral flora and usually also contaminated the endoscope and needle. No bacteria were cultured from ascitic fluid in any patient nor was the ascitic fluid white cell count elevated. Clinical infection attributable to sclerotherapy did not develop in any patient. In conclusion, the frequency of bacteremia after endoscopic sclerotherapy for bleeding esophageal varices can be reduced by prophylactic administration of intravenous cefotaxime. However, this may not be clinically relevant, given the absence of bacterascites and infection in this study. These findings do not support the routine use of antibiotics before sclerotherapy.
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PMID:Bacteremia and bacterascites after endoscopic sclerotherapy for bleeding esophageal varices and prevention by intravenous cefotaxime: a randomized trial. 785 64

A protocol for management of young febrile children at risk for bacteraemia has been used at Westmead Hospital, a university based hospital in the western Sydney region, since early 1994. Implementation of the protocol was retrospectively evaluated for the 12 month period 1 June 1994 to 31 May 1995, using the emergency department log book as the primary data source. Altogether 498 children, aged from 3 months to 3 years, with a fever > or = 39.5 degrees C were identified over this period, of whom 291 were admitted to hospital because of evidence of sepsis or identified focal infection and 207 children without focal infection were observed in the short stay annexe of the emergency department. Fifty children, considered at high risk of bacteraemia because of a total white cell count > or = 20 x 10(9)/1 received empiric antibiotic treatment with ceftriaxone, of whom 19 subsequently had proved bacteraemia and another 10 had focal infection identified during observation in the short stay annexe. Bacteraemia was due to Streptococcus pneumoniae in 16 cases and Haemophilus influenzae type b in three. No adverse events occurred at follow up. Use of a management protocol and selection on higher white cell count criterion than previously recommended by US centres resulted in restriction of empiric antibiotic treatment to a small proportion of young febrile children presenting to a busy emergency department of whom 38% were bacteraemic.
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PMID:Evaluation of a protocol for selective empiric treatment of fever without localising signs. 906 2

The aims of the study were to describe community-acquired and nosocomial bacteraemia in elderly patients and to determine the factors associated with increased mortality in these patients attending a tertiary hospital in Singapore. A consecutive series of 191 patients aged more than 60 years of age admitted in 1995 was studied retrospectively. All of them had positive blood culture results obtained from the Department of Pathology and the case notes were reviewed and entered into a standard clinical protocol. They were analysed for age, sex, place of origin, race, sites of infection, clinical parameters and bacteriology. The mean age of the study population was 75 years (SD = 8.9 years). Bacteraemia was acquired from the community in 57.5% of patients, 33% was nosocomial in origin and 9.5% acquired it in chronic long term care facilities. The common organisms cultured in community-acquired infections were Escherichia coli (26.1%), Klebsiella species (25.4%), Streptococcus species (11.1%), methicillin sensitive Staphylococcus aureus (7.6%) and Proteus mirabilis (4.8%). The common organisms cultured in nosocomial infections were Klebsiella species (19.8%), Enterobacter species (14.6%), E. coli (11.8%), Acinetobacter baumanii (9.2%), methicillin sensitive Staphylococcus aureus (7.9%) and methicillin-resistant Staphylococcus aureus (7.9%). Whilst most cases of bacteraemia were single organism cultures, 13.5% were polymicrobial. The common sources of bacteraemia were chest (27.5%), urinary tract (24.5%), skin (12.5), hepatic (8.8%), gut (4.3%), cardiovascular system (1%) and others (3.6%). In 12.5% of cases, the sources were multiple and in 5.3% of cases, the source could not be identified. Twenty-one per cent of patients with bacteraemia died. The following factors were associated with increased mortality rate: older age (median age of those that died was 78.5 years compared to survivors with a median age of 73 years, P = 0.011), patient's place of origin (patients in nursing home at higher risk of death, P = 0.04), patient's mobility status (immobile patients at higher risk, P = 0.00297), source of bacteraemia--respiratory infection at increased risk of death (P = 0.00009) but urinary tract infection had a better survival rate (P = 0.03935) and multiple sites of infection (patients with multiple sites of infection had higher risk, P = 0.00897). Methicillin-sensitive Staphylococcus aureus bacteraemia was associated with a mortality rate of 35.3%, followed by Klebsiella species 28.6%, Pseudomonas aeruginosa 28.6%, methicillin-resistant Staphylococcus aureus 25%, Proteus mirabilis 25% and E. coli 19.1%. Important clinical parameters which indicated a poor clinical outcome were: high pulse rate, hypotension, increased respiratory rate, low total white cell count, coagulopathy, hypoalbuminaemia and increased creatinine level.
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PMID:Bacteraemia in the elderly. 949 63

We reviewed a consecutive case series of 178 immunocompetent children aged 3-36 months without central venous lines who had blood cultures positive for Streptococcus pneumoniae by either of paired broth and quantitative culture methods. The incidence of accompanying focal infection was significantly greater in patients with > 10 colony-forming units (cfu)/mL than in patients with < or = 10 cfu/mL (30.4% vs 12.9% respectively, p = 0.04). No significant relationships existed between the magnitude of bacteremia and the age, gender, presenting temperature, interval until the blood culture turned positive, total peripheral blood white cell count, absolute neutrophil count, or absolute band count. Overall, the quantitative method detected 59/178 (33.1%) of the isolates, including five isolates (2.8%) that the broth method failed to detect.
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PMID:Pneumococcal bacteremia and focal infection in young children. 977 35


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