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Bacteroides Species in the Normal Neonatal Faecal Flora
V. O. Rotimi and B. I. Duerden
The Journal of Hygiene
Vol. 87, No. 2 (Oct., 1981), pp. 299-304
Published by: Cambridge University Press
Stable URL: http://www.jstor.org/stable/3862616
Page Count: 6
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Bacteroides spp. were isolated from the faeces of neonates and identified by rapid modifications of established conventional methods. Gram-negative anaerobic bacilli were recovered from 12 out of 16 neonates and a heavy growth of Bacteroides spp. was obtained from all 12 specimens. Twelve representative isolates from each subject were selected for identification; 141 of the 144 Bacteroides isolates belonged to the B. fragilis group and three to the B. melaninogenicus/oralis group. Eight species were represented within the B. fragilis group. B. vulgatus (c. 46%) and B. thetaiotaomicron (c. 30%) were the predominant species. B. fragilis, the type-species of the group, formed only a small proportion of neonatal faecal flora. The proportional representation of individual species were similar to that found in adults but B. asaccharolyticus was not represented.
The Journal of Hygiene © 1981 Cambridge University Press