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. 1975 May;29(5):663–668. doi: 10.1128/am.29.5.663-668.1975

Faculative Anaerobic Bacteria in the Digestive Tract of Chum Salmon (Oncorhynchus keta) Maintained in Fresh Water Under Defined Culture Conditions

T J Trust 1
PMCID: PMC187054  PMID: 1147605

Abstract

The bacterial flora in the digestive tract of chum salmon growing in fresh water under defined and controlled culture conditions was examined both qualitatively and quantitatively. The predominant species present in the digestive tract were identified as Aeromonas, with Aeromonas hydrophila being the most common isolate. These aeromonads were not isolated from the diet. Other bacterial species commonly isolated included Bacillus, Enterobacter, nonpigmented pseudomonads, Micrococcus, and Acinetobacter. These species were also isolated from the diet or tank water. As many as 108 viable bacteria per g (wet weight) of digestive tract plus contents were counted. After 75 days of starvation, 106 viable bacteria were counted, whereas fish fed a sterile feed contained 105 viable bacteria per g (wet weight) of digestive tract plus contents.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

  1. Croft D. N., Cotton P. B. Gastro-intestinal cell loss in man. Its measurement and significance. Digestion. 1973;8(2):144–160. doi: 10.1159/000197310. [DOI] [PubMed] [Google Scholar]
  2. Floch M. H., Gorbach S. L., Luckey T. D. Intestinal microflora. Introduction. Am J Clin Nutr. 1970 Nov;23(11):1425–1426. doi: 10.1093/ajcn/23.11.1425. [DOI] [PubMed] [Google Scholar]
  3. Hoskins L. C., Zamcheck N. Bacterial degradation of gastrointestinal mucins. I. Comparison of mucus constituents in the stools of germ-free and conventional rats. Gastroenterology. 1968 Feb;54(2):210–217. [PubMed] [Google Scholar]
  4. Ketover B. P., Young L. S., Armstrong D. Septicemia due to Aeromonas hydrophila: clinical and immunologic aspects. J Infect Dis. 1973 Mar;127(3):284–290. doi: 10.1093/infdis/127.3.284. [DOI] [PubMed] [Google Scholar]
  5. Moore W. E., Cato E. P., Holdeman L. V. Anaerobic bacteria of the gastrointestinal flora and their occurrence in clinical infections. J Infect Dis. 1969 Jun;119(6):641–649. doi: 10.1093/infdis/119.6.641. [DOI] [PubMed] [Google Scholar]
  6. ORDAL E. J., EARP B. J. Cultivation and transmission of etiological agent of kidney disease in salmonid fishes. Proc Soc Exp Biol Med. 1956 May;92(1):85–88. doi: 10.3181/00379727-92-22392. [DOI] [PubMed] [Google Scholar]
  7. Seki H. Marine microorganisms associated with the food of young salmon. Appl Microbiol. 1969 Feb;17(2):252–255. doi: 10.1128/am.17.2.252-255.1969. [DOI] [PMC free article] [PubMed] [Google Scholar]
  8. Smith P. B., Tomfohrde K. M., Rhoden D. L., Balows A. API system: a multitube micromethod for identification of Enterobacteriaceae. Appl Microbiol. 1972 Sep;24(3):449–452. doi: 10.1128/am.24.3.449-452.1972. [DOI] [PMC free article] [PubMed] [Google Scholar]
  9. Tannock G. W., Savage D. C. Association of microorganisms with the epithelium in the alimentary tract of Aspicularis tetraptera. Infect Immun. 1974 Feb;9(2):475–476. doi: 10.1128/iai.9.2.475-476.1974. [DOI] [PMC free article] [PubMed] [Google Scholar]
  10. Tannock G. W., Savage D. C. Influences of dietary and environmental stress on microbial populations in the murine gastrointestinal tract. Infect Immun. 1974 Mar;9(3):591–598. doi: 10.1128/iai.9.3.591-598.1974. [DOI] [PMC free article] [PubMed] [Google Scholar]
  11. Trust T. J., Sparrow R. A. The bacterial flora in the alimentary tract of freshwater salmonid fishes. Can J Microbiol. 1974 Sep;20(9):1219–1228. doi: 10.1139/m74-188. [DOI] [PubMed] [Google Scholar]

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