Publication Date

1979

Document Type

Dissertation/Thesis

First Advisor

Starzyk, Marvin J.

Degree Name

M.S. (Master of Science)

Legacy Department

Department of Biological Sciences

LCSH

Gemmiger formicilis; Bacteria

Abstract

Three strains of Gemmiger formicilis (Gossling), a newly described Gram-negative, highly pleomorphic, strictly anaerobic species, were tested for their reactions in various prereduced anaerobically sterilized media. The bacterium has a unique morphology in being "bowling pin" or "tear-drop" shaped. The cell dimensions vary from 0.5 μm wide and 1 to 1.5 μm long. Pairs often consist of one large cell firmly attached to a smaller cell, resembling a budding yeast. The highly pleomorphic bacterium has been isolated in high numbers from human fecal and chicken cecal specimens. Previous studies indicated that strains isolated from human feces did not readily ferment raffinose, salicin, sucrose, or trehalose in peptone yeast extract medium. Other studies showed that chicken cecal strains could ferment these carbohydrates in medium containing rumen fluid and trypticase. One human fecal strain (X2-56) and two chicken cecal strains (P9 and R15) were compared using identical procedures. Results from carbohydrate fermentations and reactions in media containing Tween 80, crystal violet, brilliant green, bile, sodium desoxycholate or sodium thiosulfate, indicate that the three strains have similar cultural characteristics.

Comments

Includes bibliographical references.||Includes illustration.

Extent

50 pages

Language

eng

Publisher

Northern Illinois University

Rights Statement

In Copyright

Rights Statement 2

NIU theses are protected by copyright. They may be viewed from Huskie Commons for any purpose, but reproduction or distribution in any format is prohibited without the written permission of the authors.

Media Type

Text

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