Bacteroides pyogenes sp. nov., Bacteroides suis sp. nov., and Bacteroides helcogenes sp. nov., New Species from Abscesses and Feces of Pigs.

Bacteroides pyogenes, Bacteroides suis and Bacteriodes helcogenes, three new species isolated from abscesses and feces of pigs, are described. They are obligately anaerobic, Gram-negative, non-motile, non-pigment-forming, non-spore-forming rods that produce succinic and acetic acids (often with traces of propionic and isovaleric acids) in peptone-yeast-glucose medium and do not grow well in 20% bile. The newly described species are phenotypically similar to strains of B. ruminicola and B. oralis. However, the new species have a low level of DNA /DNA homology with B. ruminicola, B. oralis and related organisms and also with each other. Copyright © 1983 Gustav Fischer Verlag, Stuttgart/New York. Published by Elsevier GmbH.. All rights reserved.