Blood Culture Contamination and the Type of Microorganisms in True and False Positive Results in Patients Admitted at Avicenna Qazvin

Asefzade, M; Manuchehri, F; Sajadi, E; Asefzade, S

Volume 18, Issue 4 (Sep-Oct 2010) JSSU 2010, 18(4): 361-368 | Back to browse issues page

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Asefzade M, Manuchehri F, Sajadi E, Asefzade S. Blood Culture Contamination and the Type of Microorganisms in True and False Positive Results in Patients Admitted at Avicenna Qazvin. JSSU 2010; 18 (4) :361-368
URL: http://jssu.ssu.ac.ir/article-1-1147-en.html

Blood Culture Contamination and the Type of Microorganisms in True and False Positive Results in Patients Admitted at Avicenna Qazvin

M Asefzade

, F Manuchehri

, E Sajadi ^*

, S Asefzade

Abstract: (32264 Views)

Introduction: Diagnosis of infection based on blood culture alone is not a suitable method, but it is important to understand the clinical diagnosis for interpreting blood cultures. The goal of this study was to determine blood culture contamination and the type of microorganisms in false and real positive cases in patients admitted at Avicenna Hospital. Methods: This cross sectional study was done on all patients in the emergency and internal medicine departments from April, 2008 to October, 2008 and blood for blood culture was obtained (in response to clinicians order) at least 2 times from two separate sites. Results: From 244 cases of blood culture, 62 cases (25%) were false positive, 31 cases (12%) were true positive and other cases are negative. Pseudomonas was the commonest organism in false positive cases followed by staphylococcus. Conclusion: There is a need for a close relationship between microbiology laboratory and clinical departments in order to avoid additional costs and also, cross- training for blood cultures.

Keywords: Culture Techniques; Blood, Microbiology; False positive Reaction

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Type of Study: Original article | Subject: General
Received: 2010/09/8 | Published: 2010/09/15