Background: Studies of microbiota composition of infants with small intestinal ostomy due to various etiologies are limited. Here, we characterized the intestinal microbiota of neonates with ileostomy resulting from distinct primary diseases.
Methods: Fifteen patients with necrotizing enterocolitis, eight patients with meconium peritonitis, and seven patients with Hirschsprung's disease were included in the study. The small intestinal microbiota composition in infants with ileostomy caused by these diseases was studied.
Results: Microbial diversity in neonatal ileostomy fluid was generally low, and was dominated by members of the Proteobacteria and Firmicutes phyla. At the genus level, the most abundant were Klebsiella, Escherichia-Shigella, Streptococcus, Clostridium sensu stricto 1, Enterococcus, and Lactobacillus. Streptococcus and Veillonella are related to carbohydrate metabolism and immunity, and breastfeeding can increase the proportion of these potentially beneficial bacteria. The proportion of Bifidobacterium in the breastfeeding group was higher than that in the non-breastfeeding group, and incidence of colitis and sepsis was reduced in the breastfeeding group. The proportion of Bifidobacterium increased and incidence of colitis and sepsis decreased in the breastfeeding group compared with the non- breastfeeding group, but there was no significant difference. The increase in body weight in the breastfeeding group was observed to be higher than in the non-breastfeeding group.
Conclusions: Excessive Klebsiella and Escherichia-Shigella and low abundance of Streptococcus, Veillonella and Faecalibacterium suggests that the small intestinal microbiota is in an unhealthy state after ileostomy. However, Streptococcus, Faecalibacterium, and Veillonella species were frequently present, suggesting that expansion of these bacteria might assist the development of the immune system after surgery.

Figure 1
Figure 2
Figure 3
This is a list of supplementary files associated with this preprint. Click to download.
Loading...
Posted 15 Jun, 2020
On 02 Jul, 2020
Received 30 Jun, 2020
On 29 Jun, 2020
Received 24 Jun, 2020
Invitations sent on 24 Jun, 2020
On 24 Jun, 2020
On 11 Jun, 2020
On 10 Jun, 2020
On 10 Jun, 2020
Received 03 Jun, 2020
On 03 Jun, 2020
On 20 May, 2020
Received 14 Apr, 2020
Invitations sent on 22 Mar, 2020
On 22 Mar, 2020
On 12 Mar, 2020
On 11 Mar, 2020
On 11 Mar, 2020
On 04 Mar, 2020
Received 03 Mar, 2020
Received 21 Feb, 2020
On 13 Feb, 2020
On 13 Feb, 2020
Invitations sent on 12 Feb, 2020
On 07 Feb, 2020
On 06 Feb, 2020
On 06 Feb, 2020
On 13 Jan, 2020
Received 10 Jan, 2020
Received 05 Jan, 2020
On 23 Dec, 2019
On 21 Dec, 2019
On 20 Dec, 2019
Invitations sent on 20 Dec, 2019
On 11 Dec, 2019
On 09 Dec, 2019
Posted 15 Jun, 2020
On 02 Jul, 2020
Received 30 Jun, 2020
On 29 Jun, 2020
Received 24 Jun, 2020
Invitations sent on 24 Jun, 2020
On 24 Jun, 2020
On 11 Jun, 2020
On 10 Jun, 2020
On 10 Jun, 2020
Received 03 Jun, 2020
On 03 Jun, 2020
On 20 May, 2020
Received 14 Apr, 2020
Invitations sent on 22 Mar, 2020
On 22 Mar, 2020
On 12 Mar, 2020
On 11 Mar, 2020
On 11 Mar, 2020
On 04 Mar, 2020
Received 03 Mar, 2020
Received 21 Feb, 2020
On 13 Feb, 2020
On 13 Feb, 2020
Invitations sent on 12 Feb, 2020
On 07 Feb, 2020
On 06 Feb, 2020
On 06 Feb, 2020
On 13 Jan, 2020
Received 10 Jan, 2020
Received 05 Jan, 2020
On 23 Dec, 2019
On 21 Dec, 2019
On 20 Dec, 2019
Invitations sent on 20 Dec, 2019
On 11 Dec, 2019
On 09 Dec, 2019
Background: Studies of microbiota composition of infants with small intestinal ostomy due to various etiologies are limited. Here, we characterized the intestinal microbiota of neonates with ileostomy resulting from distinct primary diseases.
Methods: Fifteen patients with necrotizing enterocolitis, eight patients with meconium peritonitis, and seven patients with Hirschsprung's disease were included in the study. The small intestinal microbiota composition in infants with ileostomy caused by these diseases was studied.
Results: Microbial diversity in neonatal ileostomy fluid was generally low, and was dominated by members of the Proteobacteria and Firmicutes phyla. At the genus level, the most abundant were Klebsiella, Escherichia-Shigella, Streptococcus, Clostridium sensu stricto 1, Enterococcus, and Lactobacillus. Streptococcus and Veillonella are related to carbohydrate metabolism and immunity, and breastfeeding can increase the proportion of these potentially beneficial bacteria. The proportion of Bifidobacterium in the breastfeeding group was higher than that in the non-breastfeeding group, and incidence of colitis and sepsis was reduced in the breastfeeding group. The proportion of Bifidobacterium increased and incidence of colitis and sepsis decreased in the breastfeeding group compared with the non- breastfeeding group, but there was no significant difference. The increase in body weight in the breastfeeding group was observed to be higher than in the non-breastfeeding group.
Conclusions: Excessive Klebsiella and Escherichia-Shigella and low abundance of Streptococcus, Veillonella and Faecalibacterium suggests that the small intestinal microbiota is in an unhealthy state after ileostomy. However, Streptococcus, Faecalibacterium, and Veillonella species were frequently present, suggesting that expansion of these bacteria might assist the development of the immune system after surgery.

Figure 1
Figure 2
Figure 3
This is a list of supplementary files associated with this preprint. Click to download.
Loading...