Fig. 2. Reading graphs of blood culture bottle of the first patient (A) showed positive flag within less than a day after starting to incubate in the automated blood culture system. Additional incubation of blood cultures revealed no change of peaks in reading graphs until 5 days. (B) Normal positive flag within a day showed abrupt peak at 13 hours after incubation.
Ann Clin Microbiol 2023;26:37-40. False positive cases in automated blood culture systems due to hyperleukocytosis
Fig. 1. Gram stain of initial blood culture of positive signal showed no bacteria, but with many WBCs (×1,000, left-first case; right-second case). WBC, white blood cell.
Ann Clin Microbiol 2023;26:37-40. False positive cases in automated blood culture systems due to hyperleukocytosis
Table 3. Multivariate analysis of risk factor for development of colistin-resistant A. baumannii infection
Ann Clin Microbiol 2023;26:29-36. Risk factors associated with colistin-resistant Acinetobacter baumannii infection Variable Colistin-resistant A. baumannii infection OR 95% CI P-value Use of teicoplanin 3.140 0.529-18.650 0.208 Hemodialysis 2.722 0.851-8.709 0.091 Pulmonary disease 2.286 0.998-5.283 0.053 Use of carbapenem 2.199 0.863-5.603 0.099 Co-infection* 1.706 0.746-3.898 0.205 Mechanical ventilation 1.614 0.684-3.809 0.275 ICU stay 1.387 0.560-3.435 […]
Table 2. Univariate analysis of risk factor for development of colistin-resistant A. baumannii infection
Ann Clin Microbiol 2023;26:29-36. Risk factors associated with colistin-resistant Acinetobacter baumannii infection Factor Colistin-resistant group (n=51) Colistin-susceptible group (n =100) P-value No. (%) No. (%) Age (yr) 68.9 (1-94) 69.4 (1-97) 0.850 Sex 0.806 Male 23 (45.1) 43(43.0) Female 28(54.9) 57(57.0) Admission department 0.496 Internal medicine 31(60.8) 48(48.0) General surgery 6(11.8) 9(9.0) Pediatrics 1(2.0) 1(1.0) […]
Table 1. Antimicrobial resistance of colistin-resistant A. baumannii and colistin-susceptible A. baumannii groups
Ann Clin Microbiol 2023;26:29-36. Risk factors associated with colistin-resistant Acinetobacter baumannii infection Antimicrobial Colistin-resistant group (n=51) Colistin-susceptible group (n =100) P-value No. (%) No. (%) Amikacin 45 (88.2) 55 (55.0) 0.000 Ampicillin/sulbactam 33 (64.7) 51 (51.0) 0.000 Cefepime 47 (92.2) 60 (60.0) 0.000 Cefotaxime 50 (98.0) 60 (60.0) 0.000 Ceftazidime 47 (92.2) 60 (60.0) 0.000 […]
False positive cases in automated blood culture systems due to hyperleukocytosis
Case report Do-Hoon Kim, Namhee Ryoo Department of Laboratory Medicine, Keimyung University School of Medicine, Daegu, Korea Corresponding to Namhee Ryoo, E-mail: nhryoo@dsmc.or.kr Ann Clin Microbiol 2023;26(2):37-40. https://doi.org/10.5145/ACM.2023.26.2.2Received on 17 March 2023, Revised on 8 May 2023, Accepted on 22 May 2023, Published on 20 June 2023.Copyright © Korean Society of Clinical Microbiology. Abstract Automated […]
Risk factors associated with colistin-resistant Acinetobacter baumannii infection
Research note Hae-Sun Chung1,2*, Chorong Hahm1,3*, Miae Lee1,2 1Department of Laboratory Medicine, Ewha Womans University College of Medicine, Seoul, 2Ewha Education and Research Center for Infection, Ewha Womans University Medical Center, Seoul, 3Department of Laboratory Medicine, Eone Laboratories, Incheon, Korea *These authors contributed equally to this work. Corresponding to Miae Lee, E-mail: miae@ewha.ac.kr Ann Clin […]