Effect of Freeze-Drying on the Viability Of Selected Anaerobic Microorganisms

Author

Joyce Ann Staab, Fort Hays State University

Department

Biology

Degree Name

Master of Science (MS)

Abstract

The viability of ten strains of anaerobic bacteria following freeze-drying in single strength skim milk, double strength skim milk, and sucrose broth was assessed over a period of one year. The eight genera included in the study were: Clostridium, Propionibacterium, Bifidobacterium, Eubacterium. Bacteroides, Fusobacterium, Peptococcus, and Peptostreptococcus. The following conclusions were drawn: 1) spore formers appeared to maintain higher viability counts than did non-spore formers: 2) viability counts were marginally dependent on the aerotolerance of the anaerobe: 3) gram-positive organisms apparently maintained higher counts than gram-negative organisms; and 4) sucrose broth maintained higher viability counts than either skim milk media.

Keywords

Anaerobic bacteria, Sporeforming bacteria, Gram-positive bacteria, Freeze-drying, Microbial viability counts, Gram-negative bacteria

Advisor

Dr. Judith C. Vogt

Date of Award

Spring 1982

Document Type

Thesis - campus only access

DOI

10.58809/LVFC8790

Recommended Citation

Staab, Joyce Ann, "Effect of Freeze-Drying on the Viability Of Selected Anaerobic Microorganisms" (1982). Master's Theses. 1867.
DOI: 10.58809/LVFC8790
Available at: https://scholars.fhsu.edu/theses/1867

Rights

© The Author(s)

Comments

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