Candida türleri, insanlarda en sık enfeksiyona neden olan fungal patojenler olup, son yıllarda tanı ve tedavi yaklaşımlarındaki gelişmelere paralel olarak gittikçe önemleri artmaktadır. Bu çalışmada, retrospektif olarak kan kültürlerinden izole edilen Candida türlerinin dağılımı ve antifungal duyarlılıklarının belirlenmesi amaçlanmıştır.
Objective: Blood culture are of vital importance in patient follow-up, as they enable the identification and production of sepsis causative microorganisms, initiate antibiotic treatment in a timely manner and reduce mortality and morbidity. In this study, it is aimed to evaluate the microorganisms grown in the automated blood culture in the microbiology laboratory of the hospital in terms of quality indicators. Methods: In this study, microorganisms grown from automated blood culture BACTEC-9120 (Becton Dickinson, USA) system from the blood culture samples sent to Duzce University Medical Microbiology Laboratory were evaluated retrospectively. For this purpose, the rejection and contamination rate of the samples for which blood culture was requested, the result of Gram staining-final identification compliance, the number of samples sent from a single bottle, and the growth times of microorganisms after incubation were determined. Results: 5037 blood culture samples were sent to the laboratory from various clinics. 1.7% of these samples were rejected as inappropriate samples. Gram stain-final identification compatibility of blood cultures was investigated and it was determined as 97.8%. The single bottle number of the samples sent was found to be 511. For the 5037 samples included in the study, growth was detected in 20.7%, of which 10.2% were considered as contaminants. In our study, the average breeding time of the factors examined for breeding time was determined to be 30.29 hours. Conclusions: As conclusion, there is no gold standard to distinguish true pathogens from contaminant agents in blood cultures.
Objective: An irreversible process begins when a systemic infection causes sepsis. Therefore, rapid identification of the agent bacteria in sepsis and its antibiotic resistance is crucially important. In this study, it was aimed to investigate the efficiency of rapid genotype test in detecting sepsis agent Gram positive bacteria and important antibiotic resistance. Methods: 2132 blood culture samples sent to the laboratory were examined with an automatic blood culture system (BACTEC, BD, USA) between 2018-2019. Blood culture bottles sent to the laboratory were Growing bacteria was identificated by VİTEK (bioMérieux, France) automated bacteria identification / antibiotic susceptibility system. In addition, bacterial species and mecA, vanA, vanB, vanC1, vanC2 / C3 genes in blood cultures with Gram positive bacterial growth were also determined by the "Genotype® BC Gram-positive (Hain Lifesience, Germany)" test. Results: 72 patients with gram-positive bacteria growth in two or more blood culture bottles were included in the study. In 44 of the samples (61%) the same bacterial species were detected with conventional method (bacteria culture) and BC Gram positive test. In 28 of the samples (39%) differences were detected between results of methods regarding bacterial species name or vancomycin/methicillin resistance rate. Although single agent was isolated with culture method in all of the samples, multiple agents were detected in eight samples with rapid genotype test. Also, it was found that in mecA positive samples, ciprofloxacin resistance was higher than mecA negative ones. Conclusions: In the study, it was observed that BC Gram positive test could correctly identify sepsis agent bacteria and their resistance genes within 4-5 hours.
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