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Blood culture - Wikipedia, the free encyclopedia Blood culture is essential in the diagnosis of infective endocarditis. In this elusive disease, blood cultures may have to be repeatedly taken during febrile episodes, when bacteria are shed from the heart valves into the bloodstream (bacteremia). Blood cultures were pioneerd in the early 20th century. en.wikipedia.org /wiki/Blood_culture   (232 words)

Blood test - Wikipedia, the free encyclopedia Blood tests are laboratory tests done on blood to gain an appreciation of disease states and the function of organs. Blood is obtained from a patient by venipuncture, except for tests such as Arterial blood gas. Blood is useful as it is a relatively non-invasive way to obtain cells, and extracellular fluid (plasma), from the body to check on its health. en.wikipedia.org /wiki/Blood_test   (417 words)

Home | aHealthyme.com Blood is drawn from the person one or more times and is tested in a laboratory to find and identify any microorganism present and growing in the blood. Blood is drawn from a person and put directly into a blood culture bottle containing a nutritional broth. The physician's skill in interpreting the culture results and assessing the person's clinical condition is essential in distinguishing a blood culture that is positive because of a true infection from a culture that is positive because it became contaminated. www.ahealthyme.com /article/gale/100084941   (1705 words)

Blood Cultures for Community-Acquired Pneumonia: Piecing Together a Mosaic for Doing Less -- Craven 169 (3): 327 -- ... The influence of the severity of community-acquired pneumonia on the usefulness of blood cultures. The impact of blood cultures on antibiotic therapy in pneumococcal pneumonia. Effect of number of blood cultures and volume of blood on detection of bacteremia in children. ajrccm.atsjournals.org /cgi/content/full/169/3/327   (1200 words)

Blood Cultures   (Site not responding. Last check: 2007-11-03) Frequently, the presence of bacteria in the blood is transient. Since the number of bacteria in blood is relatively small, a large inoculum is desirable; yet too large a sample of blood may introduce a growth-inhibiting concentration of antibodies. Blood culture bottles of suitable broth medium, which provide aerobic or anaerobic conditions, are commercially available, and their use is recommended. dentistry.ouhsc.edu /intranet-web/Courses/DMI_8351/IV.BloodCult.html   (432 words)

MedlinePlus Medical Encyclopedia: Blood culture A blood culture is a test to determine if microorganisms such as bacteria, mycobacteria, or fungus are present in the blood. Blood is drawn from a vein, usually from the inside of the elbow or the back of the hand. A blood culture is performed when an infection of the blood (bacteremia or septicemia) is suspected because of symptoms such as fever, chills, or low blood pressure. www.nlm.nih.gov /medlineplus/ency/article/003744.htm   (616 words)

Blood Culture, Routine If more than one culture is ordered, the specimens should be drawn separately at no less than 30 minutes apart to rule out the possibility of transient bacteremia by self-manipulation by the patient of mucous membranes in the mouth caused by brushing teeth, etc or by local irritations caused by scratching of the skin. Three negative sets of blood cultures in the absence of antimicrobial therapy are usually sufficient to exclude the presence of bacteremia. Sequential blood cultures in nonendocarditis patients using a 20 mL sample resulted in an 80% positive yield after the first set, a 90% yield after the second set, and a 99% yield after the third set. www.labcorp.com /datasets/labcorp/html/chapter/mono/mb002100.htm   (1518 words)

Blood Cultures: The Test Blood cultures are done to detect the presence of bacteria or yeasts, which may have spread from a specific site in the body into the bloodstream. Your doctor may order blood cultures when you are having symptoms of septicemia or sepsis, which indicates that bacteria or their products are causing harm in your body. Blood cultures are drawn more frequently in newborns who may have an infection but may not have the typical signs and symptoms of sepsis. www.labtestsonline.org /understanding/analytes/blood_culture/test.html   (643 words)

Institute for Healthcare Improvement: Blood Cultures Obtained Prior to Antibiotic Administration Blood cultures should be taken as soon as possible after the onset of fever or chills. The clinical significance of positive blood cultures: A comprehensive analysis of 500 episodes of bacteremia and fungemia in adults. Earlier positivity of central venous versus peripheral blood cultures is highly predictive of catheter-related sepsis. www.ihi.org /IHI/Topics/CriticalCare/Sepsis/Changes/IndividualChanges/BloodCulturesObtainedPriortoAntibioticAdministration.htm   (642 words)

[No title] Using the Standard aerobic/F (recommended for culturing blood of adults) and the Peds Plus (used for pediatric patients), it was demonstrated that 92.7% of 85 B. melitensis and 12 B. abortus isolates were detected by the BACTEC 9240 instrument within 5 days of incubation. Prolonged incubation of blood culture bottles and periodic performance of blind subcultures are not necessary. The BACTEC 9240 blood culture system is more sensitive than the Isolator system for the detection of B. melitensis, and is superior in terms of time to detection of the organism. www.fao.org /livestock/agah/id/brunet_main/brunet/doc/brucella.doc   (932 words)

Blood Culture A blood culture is a test to detect infection in the blood. Blood is usually collected from at least two different locations, or it may be collected at two different times a few hours apart. When the same bacteria grow in several blood cultures, it is likely that those bacteria are in the blood and are not a contaminant. www.webmd.com /hw/lab_tests/hw3603.asp   (972 words)

Contamination of Catheter-Drawn Blood Cultures -- Everts et al. 39 (9): 3393 -- Journal of Clinical Microbiology Clinical utility of blood cultures drawn from indwelling central venous catheters in hospitalised patients with cancer. Cultures of blood drawn by catheters vs venipuncture. The clinical significance of positive blood cultures in the 1990s: a prospective comprehensive evaluation of the microbiology, epidemiology, and outcome of bacteremia and fungemia in adults. jcm.asm.org /cgi/content/full/39/9/3393   (1043 words)

Cumulative positivity rates of multiple blood cultures for Mycobacterium avium-intracellulare and Cryptococcus ... The blood culture records were reviewed, and the proportion of positive blood cultures yielding less than 1 colony-forming unit per milliliter of M avium-intracellulare or C neoformans was calculated. All positive and negative blood cultures obtained during the period of potentially detectable septicemia were considered in the data analysis. Because of the sensitivity of the blood culture system and the consistency of M avium-intracellulare bacteremia and C neoformans fungemia in patients with the acquired immunodeficiency syndrome, it appears that two blood cultures are sufficient for the detection of most septic episodes caused by these organisms. www.aegis.com /aidsline/1990/nov/M90B0287.html   (548 words)

[No title] For acute endocarditis, obtain 3 separate blood cultures during the first 1—2 hours of evaluation and begin therapy. Blood should be drawn from the proximal lumen in a multi-lumened catheter. In cases where blood can not be wasted: Obtain a blood return from the line with a syringe. www.med.umich.edu /ccmu/docs/culture.doc   (1005 words)

Blood Cultures: The Test Sample Blood cultures are done to detect and identify bacteria and yeasts (a type of fungus) in the blood. Blood cultures are usually drawn into vials containing two types of media to detect both types of bacteria. If your blood culture is positive, the specific bacteria causing the infection will be identified and antibiotic susceptibility testing will be done to tell your doctor which antibiotics will be effective for treatment. labtestsonline.org /understanding/analytes/blood_culture/sample.html   (521 words)

Blood Culture   (Site not responding. Last check: 2007-11-03) These microscopic organisms usually are denied entry to the deeper tissues of the body, and bacteria that find their way into normally sterile places, like the blood, usually are destroyed quickly by white blood cells and other parts of the immune system. The point is to kill all the bacteria that may be on the surface of the skin so that they don't appear in the blood culture and interfere with the identification of the germ that actually is causing the infection. Sometimes it seems like a lot of blood is drawn for the test, but it's important that enough blood be drawn for the culture to be accurate. kidshealth.org /parent/general/sick/labtest3.html   (755 words)

Epidemiologic Notes and Reports False-Positive Blood Cultures Associated with Automated Blood-Culture Analyzers -- ... As part of the evaluation, tubing connecting the needles to both the flush and sampling circuits were cultured; both yielded S. aureus of the same phage type obtained from the contaminated blood cultures. The four blood cultures had been obtained the same day and processed sequentially on the Bactec 640 automated blood-culture analyzer; they became positive 2, 4, 7, and 8 days, respectively, after being obtained. Blood cultures in both hospitals were processed on analyzers that operate by detecting radioisotopically labeled gases produced by microorganisms growing in the special culture medium. www.cdc.gov /mmwr/preview/mmwrhtml/00001175.htm   (1049 words)

ASTP Meeting Abstracts 1997 py355492.htm The Yield of Blood Cultures in Febrile Autologous Peripheral Blood Progenitor ...   (Site not responding. Last check: 2007-11-03) Cultures were drawn on a total of 601 days, or 7.5 culture days per patient, with two to four cultures being drawn on each of these days (cost: $80,534 total or $4239 per positive culture if two cultures/day had been drawn; and $161,068 total or $8477 per per positive culture for four cultures/day). Conclusions: Positive blood cultures are not uncommon in relation both to the initial temperature spike and subsequent fever in autologous PBPC recipients. However the vast majority of cultures are negative, and consideration might be given to limiting blood cultures to two rather than four sets per day after the first febrile day. www.a-s-t.org /abstracts97/py355521.htm   (411 words)

Computers in Neonatology: Garcia-Prats JA PATIENTS AND SETTING: All positive blood culture results that were obtained from term and preterm newborn infants born from November 1993 through June 1997 at a publicly funded hospital with over 6000 live births per year. Time to positivity was determined for blood cultures obtained before the initiation antimicrobial therapy and compared with those cultures obtained after beginning therapy. CONCLUSIONS: The ESP blood culture system identified 77%, 89% and 94% of all microorganisms at 24, 36, and 48 hours of incubation in aerobic cultures obtained from both term and preterm infants. www.neonatology.org /biblio/bib610.html   (508 words)

Rule Out Guide for Possible Neonatal Sepsis   (Site not responding. Last check: 2007-11-03) Reassess clinical status and culture results at 48 hours; if the blood culture is negative (see Blood Culture Sensitivity and Specificity Study), and CSF studies benign, make a decision to discontinue antibiotics, or continue for 72 hours (see Forty-eight vs. Seventy-two hour Blood Culture Positivity Studies). An autopsy study involving infants with pathologic evidence of infection, blood culture sensitivity was 82% (32 of 39 premortum cultures were positive); and specificity was 96% (48 of 50 cultures were negative) Pediatr 64:60-64, 1979. Quantitative blood cultures in the diagnosis of sepsis in infants with umbilical and Broviac catheters. neonatal.peds.washington.edu /NICU-WEB/ruleout.stm   (672 words)

Typhoid fever - Wikipedia, the free encyclopedia The bacteria then multiply in the blood stream of the infected person and are absorbed into the digestive tract and eliminated with the waste. Diagnosis is made by blood, bone marrow or stool cultures and with the Widal test (demonstration of salmonella antibodies against antigens O-somatic and H-flagellar). In epidemics and less wealthy countries, after excluding malaria, dysentery or pneumonia, a therapeutic trial with chloramphenicol is generally undertaken while awaiting the results of Widal test and blood cultures. en.wikipedia.org /wiki/Typhoid_fever   (837 words)

Rapid Detection of Microorganisms in Blood Cultures of Newborn Infants Utilizing an Automated Blood Culture System -- ... All positive blood culture results that were obtained from term and preterm newborn infants born from November 1993 through As positive blood culture results were identified, data were prospectively obtained from the patient's medical record. Four hundred fifty-five positive blood culture results were obtained from 222 patients. pediatrics.aappublications.org /cgi/content/abstract/105/3/523   (583 words)

Time to positivity of neonatal blood cultures -- Kumar et al. 85 (3): 182 -- Archives of Disease in Childhood - Fetal ... The positive blood cultures were classified on the basis of the organism isolated as bacterial or fungal. The time to positivity of blood cultures in the study was shorter than in earlier studies, If a blood culture was negative at 36 hours, it was 98% probable to remain negative for definite or possible bacterial pathogens. fn.bmjjournals.com /cgi/content/full/85/3/F182   (2779 words)

Rapid Identification of Staphylococcus aureus in Blood Cultures by a Combination of Fluorescence In Situ Hybridization ... Rapid Identification of Staphylococcus aureus in Blood Cultures by a Combination of Fluorescence In Situ Hybridization Using Peptide Nucleic Acid Probes and Flow Cytometry -- Hartmann et al. of pathogens grown in blood cultures (5, 6). Blood cultures positive for coagulase-negative staphylococci: antisepsis, pseudobacteremia, and therapy of patients. jcm.asm.org /cgi/content/full/43/9/4855   (1304 words)

How do blood cultures sent from a paediatric accident and emergency department influence subsequent clinical ... Blood cultures in adult patients released from an urban emergency department: a 15-month experience. Effects of obtaining a blood culture on subsequent management of young febrile children without an evident focus of infection. Blood cultures in the management of febrile outpatients later found to have bacteremia. emj.bmjjournals.com /cgi/content/full/20/4/347   (1130 words)

Most Pediatric Blood Cultures Yield Bacterial Pathogens Within 24 Hours   (Site not responding. Last check: 2007-11-03) They retrospectively reviewed blood cultures collected in the emergency department, outpatient clinics, neonatal and pediatric intensive care units, and inpatient wards of their children's hospital. The investigators recorded blood culture time to positivity, identity of the bacterial or fungal isolate and characteristics of bacteremia episodes in which the initial isolate required incubation for longer than 24 hours. Of positive blood cultures of bacterial pathogens, 245 (80%) were detected by 24 hours. www.docguide.com /dg.nsf/PrintPrint/035A7C804B26EA27852570040068B4F8   (432 words)

Blood cultures in newborns and children: optimising an everyday test -- Buttery 87 (1): 25 -- Archives of Disease in ... The importance of volume of blood cultured in the detection of bacteremia and fungemia. The effect of dilution during culture on detection of low concentrations of bacteria in blood. Analysis of 281,797 consecutive blood cultures performed over an eight-year period: trends in microorganisms isolated and the value of anaerobic culture of blood. fn.bmjjournals.com /cgi/content/full/87/1/F25   (2437 words)

Disseminated Mycobacterium avium complex (MAC): Correlation between blood cultures and tissue burden in AIDS patients. BACKGROUND: MAC quantitative blood cultures are used to evaluate therapeutic response, but the relationship of this measurement to tissue burden is not known. To determine the relationship between quantitative MAC cultures in blood and tissues and the influence of therapy, we prospectively correlated histopathology and MAC colony forming units (CFU) in tissue and blood in autopsied patients with MAC bacteremia. Histologic involvement of the RE organs correlated with quantitative tissue cultures (p=0.008). www.aegis.com /aidsline/1995/dec/M95C2990.html   (490 words)

Utility of urine and blood cultures in pyelonephritis -- Thanassi 4 (8): 797 -- Academic Emergency Medicine Utility of urine and blood cultures in pyelonephritis blood culture results with a change in antibiotic therapy was assessed. blood cultures were positive; none prompted a change in antibiotics. www.aemj.org /cgi/content/abstract/4/8/797   (305 words)

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