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Appl Environ Microbiol. 1974 April; 27(4): 713-723
Copyright © 1974 American Society for Microbiology. All Rights Reserved.

Stomach Fermentation in East African Colobus Monkeys in Their Natural State

Kyoko Ohwaki, R. E. Hungate, Leonard Lotter1, R. R. Hofmann2 and Geoffrey Maloiy3

Department of Bacteriology, University of California, Davis, California 95616
Department of Epidemiology and Preventive Medicine, University of California, Davis, California 95616
Department of Veterinary Anatomy and Histology, University College, Nairobi, Kenya
East Africa Veterinary Research Organization, Muguga, Kenya

ABSTRACT

The microbial fermentation in the stomachs of two monkeys, Colobus polykomos, collected in Kenya, was studied. The gas accumulated within the stomach contained H2 but no CH4. Volatile fatty acid concentrations were high, but accumulated acid prevented determination of the fermentation rate in untreated, incubated stomach contents. Upon addition of bicarbonate, a very rapid rate could be demonstrated. Some D- and L-lactate were in the stomach contents. Starchy seeds or fruits rather than leaves appeared to have been consumed. Microscopically, the most prominent microorganisms seen were large, very refringent cocci, possibly Sarcina ventriculi, and various smaller cocci and rods. The 28 cultured strains of bacteria included 14 Staphylococcus, 2 Streptococcus, 10 Propionibacterium, and 2 Peptostreptococcus. The culture count constituted 10 to 20% of the direct count. No protozoa or cellulolytic bacteria were found.

FOOTNOTES

1 Present address: Institut für Lebensmittelhygiene, Freie Universität Berlin, 1 Berlin 33, West Germany.

2 Present address: Veterinärische Anatomische Institut, 6300 Giessen, West Germany.

3 Present address: Department of Animal Physiology, University of Nairobi, Nairobi, Kenya.

Appl Environ Microbiol. 1974 April; 27(4): 713-723
Copyright © 1974 American Society for Microbiology. All Rights Reserved.





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Copyright © 1974 by the American Society for Microbiology. All rights reserved.