جداسازی و تعیین پروفایل حساسیت آنتی‌بیوتیکی سویه های تاتوملا پتی سئوس جدا شده از شیرهای خشک مصرفی نوزادان در بخش NICU

Background and purpose: Tatumella ptyseos is a rod-shaped, gram-negative, facultative anaerobic, within the Enterobacteriaceae family. It is an important opportunistic pathogen in human that could result in many diseases in all age groups including premature and immunocompromised persons. The aim of this study was to isolate and determine antimicrobial susceptibility pattern of Tatumella ptyseos strains isolated from consumed powdered infant formula milk in Neonatal Intensive Care Unit (NICU). Materials and methods: In this cross-sectional study a total of 125 samples from consumed powdered infant formula milk in NICU were surveyed during 2011-2012. This study was performed in Tehran University of Medical Sciences (Division of Microbiology, School of Public Health), Tehran, Iran. Isolation and Identification of microorganisms were carried out according to FDA method. Antimicrobial susceptibility test was performed using the standard disc diffusion method based on CLSI (2011) recommendations. Analysis of data was performed by SPSS ver. 19. Results: Tatumella ptyseos was isolated from 4 (3.2%) powdered infant formula milk samples. The results showed sensitivity of isolated strains to aminoglycoside antibiotics (amikacin (100%), tobramycin (100%), and gentamicin (100%)). Conclusion: Tatumella ptyseos is relatively unknown to many laboratory personnel that could be easily missed in routine diagnosis processes. However, it is necessary for laboratory workers to be aware of Tatumella ptyseos and look out for it in different samples