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2017 ; 8
(ä): 2243
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Low Microbial Diversity and Abnormal Microbial Succession Is Associated with
Necrotizing Enterocolitis in Preterm Infants
#MMPMID29187842
Dobbler PT
; Procianoy RS
; Mai V
; Silveira RC
; Corso AL
; Rojas BS
; Roesch LFW
Front Microbiol
2017[]; 8
(ä): 2243
PMID29187842
show ga
Despite increased efforts, the diverse etiologies of Necrotizing Enterocolitis
(NEC) have remained largely elusive. Clinical predictors of NEC remain
ill-defined and currently lack sufficient specificity. The development of a
thorough understanding of initial gut microbiota colonization pattern in preterm
infants might help to improve early detection or prediction of NEC and its
associated morbidities. Here we compared the fecal microbiota successions,
microbial diversity, abundance and structure of newborns that developed NEC with
preterm controls. A 16S rRNA based microbiota analysis was conducted in a total
of 132 fecal samples that included the first stool (meconium) up until the 5th
week of life or NEC diagnosis from 40 preterm babies (29 controls and 11 NEC
cases). A single phylotype matching closest to the Enterobacteriaceae family
correlated strongly with NEC. In DNA from the sample with the greatest abundance
of this phylotype additional shotgun metagenomic sequencing revealed Citrobacter
koseri and Klebsiella pneumoniae as the dominating taxa. These two taxa might
represent suitable microbial biomarker targets for early diagnosis of NEC. In NEC
cases, we further detected lower microbial diversity and an abnormal succession
of the microbial community before NEC diagnosis. Finally, we also detected a
disruption in anaerobic microorganisms in the co-occurrence network of meconium
samples from NEC cases. Our data suggest that a strong dominance of Citrobacter
koseri and/or Klebsiella pneumoniae, low diversity, low abundance of
Lactobacillus, as well as an altered microbial-network structure during the first
days of life, correlate with NEC risk in preterm infants. Confirmation of these
findings in other hospitals might facilitate the development of a microbiota
based screening approach for early detection of NEC.