microbial colonization of endotracheal tube in intensive care unit patients

Authors

shahla samieeifard

health research institute, infectious and tropical disease research center; department of microbiology, school of medicine, jundishapur university of medical sciences, ahvaz, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی جندی شاپور اهواز (ahvaz jundishapur university of medical sciences) neda kiasat

department of medical mycology, jundishapur university of medical sciences, ahvaz, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی جندی شاپور اهواز (ahvaz jundishapur university of medical sciences) fatemeh noorbakhsh

department of microbiology, islamic azad university, varamin-pishva branch, iran.سازمان اصلی تایید شده: دانشگاه آزاد اسلامی ورامین و پیشوا (islamic azad university of varamin va pishva) elham baghdadi

department of microbiology, islamic azad university, varamin-pishva branch, iran.سازمان اصلی تایید شده: دانشگاه آزاد اسلامی ورامین و پیشوا (islamic azad university of varamin va pishva) farzaneh nateghi

abstract

microbial biofilms has remained a major complication of tracheal intubation in patients requiring ventilator equipment. the aim of this study was to characterize bacterial and fungal biofilms in endotracheal tubes from intensive care unit (icu) patients in ahwaz, iran. in this cross-sectional descriptive study, patients admitted to icu that required mechanical ventilation for at least 24 hours were evaluated. specimens were collected from tracheal tubes of patients with endotracheal aspiration, when they had clinical manifestation of pneumonia. the specimens were microbiologically investigated and the bacterial and fungal isolates were identified by using standard cultural and biochemical tests. in total, 350 cases had tracheal tube aspirate positive cultures. the most of isolates are known to cause colonization of endotracheal tube included: coagulase negative staphylococci(18.2%), e.coli (18%), enterobacter spp. (16.2%), pseudomonas spp. (14.6%), acinetobacter spp. (9.7%), s.aurous (8.1%), klebsiella spp. (6.7%), and serratia spp. (0.4%). 7.4% were colonized with candida spp. that the most common species was c.albicans (42.3%). the coagulase negative staphylococci species identified by mass spectrometry were: s.epidermidis (64%), s.haemolyticus (17.1%), s.lugdune (3.1%), s.warnerii (6.25%), s.hominis (6.25%), s.pasteur (3.1%). there was significant association between duration of being intubated and s.aurous, enterobacter spp. (p=0.002). the presence of bacterial and fungal biofilms of endotracheal tube suggests that it may be important in biofilm development and may provide a therapeutic target for the prevention of ventilator-associated pneumonia.

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Journal title:
international journal of molecular and clinical microbiology

جلد ۴، شماره ۲، صفحات ۴۲۴-۴۲۷

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