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Dynamics of fecal microbial communities in children with diarrhea of unknown etiology and genomic analysis of associated Streptococcus lutetiensis
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Jin, Dong, Chen, Chen , Li, Lianqing, Lu, Shan, Li, Zhenjun, Zhou, Zhemin, Jing, Huaiqi, Xu, Yanmei, Du, Pengcheng, Wang, Haiyin, Xiong, Yanwen, Zheng, Han, Bai, Xuemei, Sun, Hui, Wang, Lei , Le, Changyun, Gottschalk, Marcelo and Xu, Jianguo (2013) Dynamics of fecal microbial communities in children with diarrhea of unknown etiology and genomic analysis of associated Streptococcus lutetiensis. BMC Microbiology, 13 (141). doi:10.1186/1471-2180-13-141 ISSN 1471-2180.
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Official URL: http://dx.doi.org/10.1186/1471-2180-13-141
Abstract
Background
The sequences of the 16S rRNA genes extracted from fecal samples provide insights into the dynamics of fecal microflora. This potentially gives valuable etiological information for patients whose conditions have been ascribed to unknown pathogens, which cannot be accomplished using routine culture methods. We studied 33 children with diarrhea who were admitted to the Children’s Hospital in Shanxi Province during 2006.
Results
Nineteen of 33 children with diarrhea could not be etiologically diagnosed by routine culture and polymerase chain reaction methods. Eleven of 19 children with diarrhea of unknown etiology had Streptococcus as the most dominant fecal bacterial genus at admission. Eight of nine children whom three consecutive fecal samples were collected had Streptococcus as the dominant fecal bacterial genus, including three in the Streptococcus bovis group and three Streptococcus sp., which was reduced during and after recovery. We isolated strains that were possibly from the S. bovis group from feces sampled at admission, which were then identified as Streptococcus lutetiensis from one child and Streptococcus gallolyticus subsp. pasteurianus from two children. We sequenced the genome of S. lutetiensis and identified five antibiotic islands, two pathogenicity islands, and five unique genomic islands. The identified virulence genes included hemolytic toxin cylZ of Streptococcus agalactiae and sortase associated with colonization of pathogenic streptococci.
Conclusions
We identified S. lutetiensis and S. gallolyticus subsp. pasteurianus from children with diarrhea of unknown etiology, and found pathogenic islands and virulence genes in the genome of S. lutetiensis.
Item Type: | Journal Article | ||||||||||||||||||||||||
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Subjects: | R Medicine > RJ Pediatrics | ||||||||||||||||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Medicine > Warwick Medical School > Health Sciences Faculty of Science, Engineering and Medicine > Medicine > Warwick Medical School > Biomedical Sciences > Microbiology & Infection Faculty of Science, Engineering and Medicine > Medicine > Warwick Medical School |
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Library of Congress Subject Headings (LCSH): | Diarrhea in children, Diarrhea, Infantile, Streptococcal infections | ||||||||||||||||||||||||
Journal or Publication Title: | BMC Microbiology | ||||||||||||||||||||||||
Publisher: | BioMed Central Ltd. | ||||||||||||||||||||||||
ISSN: | 1471-2180 | ||||||||||||||||||||||||
Official Date: | 19 June 2013 | ||||||||||||||||||||||||
Dates: |
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Volume: | 13 | ||||||||||||||||||||||||
Number: | 141 | ||||||||||||||||||||||||
DOI: | 10.1186/1471-2180-13-141 | ||||||||||||||||||||||||
Status: | Peer Reviewed | ||||||||||||||||||||||||
Publication Status: | Published | ||||||||||||||||||||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||||||||||||||||||||
RIOXX Funder/Project Grant: |
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