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

Comparison of conventional blood culture media with newer formulations of Bactec media for radiometric detection are lacking. Therefore, we compared the yield and speed of detection of clinically important microorganisms with supplemented peptone broth (SPB) and Bactec aerobic (6B) and anaerobic (7C or 7D) broths in 7,627 blood samples from adult patients. Acridine orange stains from SPB, radiometric readings from Bactec, and routine subcultures from all bottles were done at the same time intervals. Bactec grew more facultative gram-positive bacteria (P less than 0.02), Bacteroides spp. (P less than 0.001), gram-negative anaerobes (P less than 0.001). The two-bottle Bactec system required less time to detect Staphylococcus aureus (P less than 0.001), facultative gram-positive bacteria (P less than 0.001), Escherichia coli (P less than 0.02), facultative gram-negative bacteria (P less than .001), and fungi (P less than 0.001). Overall, Bactec yielded 11% more microorganisms and detected bacteremia sooner in 18% of samples than did SPB. This advantage was not because of radiometric monitoring, since most positive Bactec bottles were detected macroscopically. SPB offered no advantage for any group of microorganisms. We conclude that Bactec 6B and 7C or 7D broths used as a unit are superior to a single bottle of SPB with an equal volume of blood for the detection of bacteremia and fungemia, and that Bactec's superiority is not due to the method of detection.
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PMID:Controlled evaluation of supplemented peptone and Bactec blood culture broths for the detection of bacteremia and fungemia. 398 98

We report a retrospective analysis of 75 children with hepatic portoenterostomies hospitalized because of fever. Bacterial cholangitis was the most commonly defined cause of fever within 3 months of surgery. Pneumonia and upper respiratory infections were more common 3 months to 2 years following the procedure; however, cholangitis continued to occur during this time period. Twenty percent of hospitalizations were associated with bacteremia or fungemia. Streptococcus pneumoniae was the most common pathogen isolated from the blood. Three children with presumed cholangitis continued to have fever until effective antipseudomonal antibiotic coverage was implemented. The findings in this study lead to the following suggestions: vaccinate all children with pneumococcal vaccine at 2 years of age; a chest radiograph and dental evaluation should be obtained when evaluating the febrile child; empiric treatment for possible cholangitis should include an antipseudomonal penicillin derivative with an aminoglycoside; and if signs of peritonitis are present antibiotic treatment should also include antimicrobials effective against Haemophilus influenzae.
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PMID:Diagnosis and treatment of the febrile child following hepatic portoenterostomy. 404 60

Our recent clinical experience suggested that bacteremia may interfere with the detection of concomitant fungemia when standard blood culture methods are used. To determine the extent to which bacteria may interfere with fungal isolation from blood cultures, an in vitro model simulating blood cultures taken during concomitant fungemia and bacteremia was created. Each of six bacteria (Staphylococcus epidermidis, Staphylococcus aureus, Streptococcus faecalis, Escherichia coli, Klebsiella pneumoniae, and Pseudomonas aeruginosa) was combined with each of three pathogenic yeasts (Candida albicans, Candida tropicalis, and Torulopsis glabrata) in vented blood culture bottles containing enriched brain heart infusion broth and fresh normal human blood. Blood culture bottles were analyzed at 1, 2, and 7 days of incubation. Gram strains and subcultures onto chocolate and MacConkey agars failed to detect fungi in 37.0, 66.7, and 100% of samples, respectively. However, subcultures onto Sabouraud dextrose agar failed in only 13% of the samples (occurring only with P. aeruginosa). In a rabbit model of concomitant fungemia with C. albicans and bacteremia with P. aeruginosa, no yeasts were recovered from blood cultures despite 100% detection of P. aeruginosa. Therefore, the usual microbiological techniques may be inadequate to detect fungemia when concomitant bacteremia is present.
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PMID:Detection of fungemia obscured by concomitant bacteremia: in vitro and in vivo studies. 618 87

Advances continue to be made in methods for more reliable or more rapid means of detecting bacteremia and fungemia. The importance of blood sample volume and broth dilution has been established in controlled studies. New technology includes the use of resins that remove antimicrobials from blood samples, detection of radioactivity from organisms given radiolabeled substrate, use of dyes that stain microbial DNA and RNA, use of slides coated with growth media, and lysis-centrifugation for trapping microorganisms. Technology now being considered includes counterimmunoelectrophoresis, head-space gas chromatography, electrical impedance, microcalorimetry, and the use of lasers to detect pH changes and turbidity.
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PMID:Recent and innovative methods for detection of bacteremia and fungemia. 619 14

Microscopic examination of stained granulocyte smears can lead to the early identification of bacterial and fungal infections. The technique is simple, inexpensive, and safe. Although the test can be time consuming, it is clinically useful if performed when a high grade bacteremia or fungemia is likely to be present (Table 3). The results are examiner dependent, but in the proper clinical setting should be reliable. Moreover, the slide can be saved as a part of the medical record, examined by others, and restained if necessary. A positive smear allows the physician to strengthen the empirical antimicrobial regimen against a particular organism which will hopefully improve the outcome of the septic process.
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PMID:Detection of bacteremia and fungemia: microscopic examination of peripheral blood smears. 620 61

Blood cultures obtained with a lysis-centrifugation (L-C) system and a conventional two-bottle broth system were compared for the recovery of bacteria and yeasts from 7,000 cultures. The L-C system recovered significantly more total organisms, Escherichia coli, and Candida spp. and detected more patients with bacteremia and fungemia due to members of the family Enterobacteriaceae and yeasts. The broth system recovered significantly more streptococci and detected significantly more low-level Pseudomonas bacteremias. Polymicrobic bacteremia and fungemia were detected equally well by either culture system. Aerobic organisms grew equally well on blood, chocolate, or brain heart infusion agar plates used for L-C inoculation. A total of 82% of colony counts measured no more than 10 CFU/ml of blood, and it was at these low levels that enhanced detection of organisms by either system was observed. The L-C system isolated organisms and detected yeasts more rapidly than did the broth system. Contaminants occurred in 8.2% of L-C cultures and 1.9% of broth cultures. Low colony counts on L-C plates occurred for both Staphylococcus epidermidis contamination and septicemia.
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PMID:Comparative recovery of bacteria and yeasts from lysis-centrifugation and a conventional blood culture system. 635 32

The efficiency of the 10-ml Isolator (E. I. du Pont de Nemours & Co., Inc.) for recovery of pathogens from blood was compared with that of BACTEC 6B and 7C media (Johnston Laboratories) by using 4,195 cultures from 1,662 patients. During the first phase of the study, BACTEC bottles were inoculated with 3 ml of blood; in the second phase, bottles were inoculated with 5 ml. The objectives were to compare results with similar blood volumes used for the detection of anaerobes as well as similar overall volumes and to determine the relative sensitivity of BACTEC media inoculated with the minimum and maximum volumes suggested by the manufacturer. From 180 patients, 391 significant isolates were recovered, 354 (91%) with the Isolator and 304 (78%) with the bottles. Isolators recovered 31 (15%) and 19 (18%) more pathogens overall than did the two-bottle system inoculated with 3 and 5 ml of blood, respectively, including 30 (36%) and 10 (34%) more Enterobacteriaceae. Recovery of anaerobes was greater in the BACTEC anaerobic medium, but only when its inoculum was increased to 5 ml. No significant differences existed between the two systems in pathogen detection times or detection of polymicrobic bacteremia. The Isolator contamination rate (8.3%) was approximately 4 times that of the bottles. The number of CFU of pathogen per milliliter of blood, blood volume sampled, and number of Isolators collected were more important than antimicrobial agent pretreatment in contributing to patient bacteremia of fungemia undetected by the Isolator. The Isolator appeared to be a practical alternative for recovery of aerobic and facultatively anaerobic pathogens from the blood.
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PMID:Clinical laboratory comparison of the 10-ml isolator blood culture system with BACTEC radiometric blood culture media. 638 71

Before administration of intensive cytotoxic therapy, 90 central venous catheters were inserted into 80 patients with malignancies. Twenty-seven episodes of bacteremia and fungemia occurred during 96 treatment courses. The majority of these infections were due to gram-positive bacteria (45%) or fungi (22%), although gram-negative organisms accounted for 33%. Catheter occlusion occurred in patients receiving intravenous phenytoin, but blood products could be infused without difficulty. An increase in gram-positive bacteremias in patients with these catheters and drug-induced catheter occlusion must now be appreciated.
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PMID:Occlusion and infection in Broviac catheters during intensive cancer therapy. 664 May 5

Thirty-two patients died of pancreatitis and its complications over a 10-year period. Infection (bacteremia, fungemia, or pancreatic abscess) was the major cause of death in 80%. In the remaining 20%, refractory hypotension or respiratory failure were the lethal mechanisms. In only 78% of patients was the correct diagnosis made before death. Ninety-four percent of those who died did so during their first clinical episode of pancreatitis. Prophylactic antibiotics did not prevent the development of pancreatic abscesses and organisms resistant to the antibiotics used often became the primary pathogens. Certain prognostic factors reliably separated those who died from those who lived. Peritoneal lavage and dialysis may be helpful in both the early diagnosis and therapy of severe acute pancreatitis.
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PMID:Lethal pancreatitis. 665 Apr 70

Laboratory data, on positive blood cultures, were reviewed for the period 1961-1981. A total of 1809 episodes of bacteremia and fungemia were evaluated as to monthly occurrence. Of these, 42% were due to Gram positive cocci, 51% to Gram negative bacilli, 5% to anaerobes and 2% to yeasts. When seasonal patterns were categorized, most were bi- or multiphasic except Streptococcus pneumoniae and Staphylococcus aureus which yielded mono- and aphasic patterns, respectively. These results show the occurrence of certain pathogens, like S. pneumoniae, to be linked with seasons or months of the year.
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PMID:Seasonal and monthly variation of Streptococcus pneumoniae and other pathogens in bacteremia (1961-1981). 667 69


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