A cross-sectional analysis of neonatal bacteremia in the neonatal intensive care unit of the Philippine General Hospital from July to December 2006

ABSTRACT

The Philippine General Hospital (PGH) has the most number of high-risk infant admissions locally. Neonatal bacteremia and sepsis are the perennial problems encountered. Previous researches may not be reflective of the current situation in the Neonatal Intensive Care Unit (NICU) of PGH, thus an updated study on neonatal bacteremia becomes important. Objectives: This study was performed to describe the clinical profile of neonates born with positive blood cultures together with the new criteria for sepsis as defined by the 2001 International Pediatric Consensus Conference at PGH from July to December 2006. Methods: A prospective chart review of all neonates born with positive blood cultures at UP-PGH from July 1 to December 31, 2006 was performed. Demographic, clinical, and laboratory data were then analyzed. Results: Out of 3,870 live births, 103 (2.6%) patients with positive blood cultures fulfilled the criteria of sepsis. Mothers were around 20 to 25 years of age comprising 35 (34%), less than half had prenatal check-ups and more than 2/3 had not maternal immunizations. Fifty-eight (56%) of the neonates were males, 68 were premature (66%), 76 were appropriate for gestational age (74%), and 37 were of low birth weight (36%). Most patients (62 or 60%) developed sepsis within the first 3 days of admission, while 65 (63%) patients had pneumonia. The most common organisms isolated were Pseudomonas putida (50 or 49%), Burkholderia mallei (15 or 15%) and Burkholderia cepacia (8 or 8%). The organisms were sensitive Ceftazidime, Cefepime and Piperacillin-Tazobactam. Of 103 subjects, 58 or 56% fulfilled the criteria for systemic inflammatory response syndrome (SIRS) for sepsis. Multivariate analysis showed that those with SIRS were 4.89 times more likely to die than those without SIRS. Conclusion: Sepsis usually develops among neonates in less than 72 hours after their delivery at PGH. The neonates who were prone to develop sepsis were those who are male, premature, appropriate for gestational age, and of low birth weight. The organisms that predominate in PGH are usually gram-negative pathogens. The number of hospital-acquired infection is significant. SIRS could be an important prognostic factor in affecting outcome and may aid significantly in the proper diagnosis of sepsis in newborns.