Fecal microflora in health persons in a preindustrial region.

Applied Microbiology
L J MataE Villatoro

Abstract

Procedures for quantitating the fecal microflora of man were described. Special attention was given to criteria for characterizing the culturable aerobic, Micro-aerophilic, and anaerobic bacteria. Three groups of healthy persons were studied: wholly breast-fed infants (2 to 4 month-olds), weanlings (1 to 2 year-olds), and adults. In breast-fed children, bifidobacteria predominate and outnumber by one or several logs all other culturable bacteria. The fecal flora of wholly breast-fed infants is "simpler" and more numerous [10(11) to 10(12) per g (wet weight) of feces than that of the adult 10(2) to 10(11) per g]. In the adult, gram-negative anaerobic bacilli (bacteroides) outnumber all other groups by a factor of 1 log or more. Weanlings receiving an adult-type diet, but still breast-fed, showed a flora intermediate between that of the wholly breast-fed infant and that of the adult, but more similar to the latter. Anaerobes always constitute the predominant component of the culturable flora of children and adults and are always found in large numbers under conditions of health. The aerobes are significantly less numerous, and vary widely in their number and in the frequency with which they appear in feces.

References

Mar 3, 1966·The New England Journal of Medicine·M H KalserD Frazier
May 1, 1968·The American Journal of Tropical Medicine and Hygiene·D C Dale, L J Mata
Mar 1, 1967·Proceedings of the Society for Experimental Biology and Medicine·R W Spears, R Freter
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Apr 1, 1933·Journal of Bacteriology·A H Eggerth, B H Gagnon
May 1, 1962·Journal of Bacteriology·L Zubrzycki, E H Spaulding

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Citations

Jun 1, 1973·Bacteriological Reviews·J A PoupardR F Norris
Apr 1, 1974·Infection and Immunity·J Gossling, J M Slack
Jun 1, 1975·Applied Microbiology·E Capparelli, L Mata
May 1, 1984·Clinical Pediatrics·I A Elegbe, E O Ojofeitimi

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