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The Change in Intestinal Lactobacillus Count among Healthy Neonates

Korean Journal of Pediatrics 2004;47(8):833-838.
Published online August 15, 2004.
The Change in Intestinal Lactobacillus Count among Healthy Neonates
Hyun Joo Lee, Hyun Ji Lee, Su Jin Cho, Jung Wan Seo, Seung Joo Lee, Eun Ae Park
Department of Pediatrics, College of Medicine, Ewha Womans University, Seoul, Korea
건강한 신생아에서 장내 Lactobacillus의 변화
이현주, 이현지, 조수진, 서정완, 이승주, 박은애
이화여자대학교 의과대학 소아과학교실
Correspondence: 
Eun Ae Park, Email: pea8639@ewha.ac.kr
Abstract
Purpose
: Enhancing overall health by preventive and therapeutic use of probiotics has shown great promise on inflammatory, infectious, neoplastic disorders, allergies, et al. To attain preliminary data for the use of probiotics, we have studied the change in intestinal flora, Lactobacillus count among healthy, full term neonates.
Methods
: Fresh stool samples were collected on the 2nd or 5th day of life in forty healthy full term neonates born at Ewha Womans University Hospital. Geographic factors, feeding type and gastrointestinal manifestations such as vomiting or diarrhea were recorded. Stool samples were innoculated for 48 hours in a Lactobacillus selective media in anaerobic conditions at 37℃, and the Lactobacillus colonies were counted.
Results
: The lactobacillus colony count(LCC) was significantly higher in the exclusively breast milk fed neonates than those fed with a mixture of breast milk and formula(P=0.0017). LCC was significantly higher in the stool samples collected on the 5th postnatal day than the 2nd postnatal day(P= 0.0059). There were no significant differences in the LCC by sex or delivery type, and there were no significant correlations in the LCC according to the gestational age, birth weight, frequency of breast feeding, amount of milk feeding or frequency of defecation.
Conclusion
: These results suggest that breast feeding provides a more favorable environment than mixed feeding with formula for the Lactobacillus growth, and LCC increases with time after birth. Considering the fact that one of the main causes of necrotizing enterocolitis is the disruption of intestinal normal flora, the result of this study can be used as a preliminary data for investigating the effect of probiotics in neonates.
Key Words: Probiotics, Lactobacillus, Neonate, Flora


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