Neonatal blood stream infections (BSI) are major cause of morbidity and mortality in developing countries. It is crucial to continuously monitor the local epidemiology of neonatal BSI to detect any changes in patterns of infection and susceptibility to various antibiotics.
To examine the etiology of BSI in two neonatal intensive care units (NICU) in the Republic of Georgia, a resource-poor country, and to determine antibiotic susceptibility of the isolated organisms.
Cross-sectional study among all septic infants was conducted in NICU of two pediatric hospitals in Tbilisi between 09/2003-09/2004.
A total of 200 infants with clinical signs of sepsis were admitted in two NICUs. Of these, 126 (63%) had confirmed bacteremia. Mortality rate was 34%. A total of 98 (78%) of 126 recovered isolates were Gram-negative organisms, and 28 (22%) were Gram-positive. Klebsiella pneumoniae was the most common pathogen, accounting for 36 (29%) of 126 isolates, followed by Enterobacter cloacae – 19 (15%), and S. aureus – 15 (12%). The gram-negative organisms showed high degree of resistance to commonly used antibiotics such as ampicillin, amoxicillin/clavulanate, and comparatively low resistance to amikacin, ciprofloxacin, carbapenems, and gentamicin; 40% of S. aureus isolates were methicillin resistant (MRSA). In multivariate analysis only umbilical discharge was a significant risk factor for having positive blood culture at admission to NICU (PR=2.25, 95% CI 1.82-2.77).
Neonatal BSI was mainly caused by gram-negative organisms, which are developing resistance to commonly used antibiotics. Understanding the local epidemiology of neonatal BSI can lead to the development of better medical practices, especially more appropriate choices for empiric antibiotic therapy, and may contribute to improvement of infection control practices.