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ORIGINAL ARTICLE
Korean J Pediatr 2017 May;60(5) :145-150.
Published online 2017 May 15.       
Clostridium difficile colonization and/or infection during infancy and the risk of childhood allergic diseases
Sun Hwa Lee1, Yun Na Gong2, Eell Ryoo1
1Department of Pediatrics, Gachon University Gil Medical Center, Incheon, Korea
2Graduate School of Medicine, Gachon University, Incheon, Korea
Corresponding Author: Eell Ryoo ,Tel: +82-32-460-3224, Fax: +82-32-460-3224, Email: ryoo518@gilhospital.com
Copyright © 2017 by The Korean Pediatric Society
ABSTRACT
Purpose: The gut microbiota can influence several diseases through immune modulation; however, the exact role of microbes such as Clostridium difficile and the relationship between microbiota colonization and allergic diseases are not well known. This study aimed to determine the relationship between C. difficile colonization and/or infection (CDCI) during infancy and allergic diseases during early childhood.
Methods: Infants 1–12 months of age presenting changes in bowel habits for more than 2 weeks were enrolled in this study. After dividing them into 2 groups according to the presence and absence of C. difficile, the risk of allergic disease development during childhood was identified and compared.
Results: Sixty-five patients were included in this study; 22 (33.8%) were diagnosed with CDCI. No significant differences were observed in baseline characteristics between the C. difficile-positive and -negative groups except for antibiotic exposure (22.7% vs. 60.5%, P=0.004). Compared to the C. difficile-negative group, the risk of developing at least one allergic disease was higher in the C. difficile-positive group after adjusting other variables (adjusted odds ratios, 5.61; 95% confidence interval, 1.52–20.74; P=0.007). Furthermore, food allergies were more prevalent in the C. difficile-positive group (P=0.03).
Conclusion: CDCI during infancy were associated with a higher risk of developing allergic diseases during early childhood. These results suggest that CDCI during infancy might reflect the reduced diversity of the intestinal microbiota, which is associated with an increased risk of allergic sensitization. To identify the underlying mechanism, further investigation and a larger cohort study will be needed.
Keywords: Allergy | Allergic diseases | Clostridium difficile | Gut microbiota | Food allergy
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