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Updated: Aug 14, 2026

Isolation and Characterization of the Natural Microbiota of the Model Nematode Caenorhabditis elegans
Published on: August 17, 2022
Bacteroides coprosuis sp. nov., isolated from swine-manure storage pits
Terence R Whitehead1, Michael A Cotta1, Matthew D Collins2
1Fermentation Biotechnology Research Unit, National Center for Agricultural Utilization Research, USDA, Agricultural Research Service, 1815 N. University Street, Peoria, IL 61604, USA.
Abstract:
Two Gram-negative, anaerobic, non-spore-forming, rod-shaped organisms were isolated from a swine-manure storage pit. Based on morphological and biochemical criteria, the strains were tentatively identified as belonging to the genus Bacteroides but they did not appear to correspond to any recognized species of the genus. Comparative 16S rRNA gene sequencing studies showed that the strains were related closely to each other and confirmed their placement in the genus Bacteroides, but sequence divergence values of >10 % from reference Bacteroides species demonstrated that the organisms from manure represent a novel species. Based on biochemical criteria and molecular genetic evidence, it is proposed that the unknown isolates from manure be assigned to a novel species of the genus Bacteroides, as Bacteroides coprosuis sp. nov. The type strain is PC139T (=CCUG 50528T=NRRL B-41113T).
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