Veterinary bacteriology; a treatise on the bacteria, yeasts, molds, and protozoa pathogenic for domestic animals by Buchanan Robert Earle 1883-

Author:Buchanan, Robert Earle, 1883-
Language: eng
Format: epub
Tags: Veterinary bacteriology
Publisher: Philadelphia, London, W. B. Saunders company
Published: 1911-03-25T05:00:00+00:00

INTESTINAL OR COLON-TYPHOID GROUP

269

infections in cattle. The organism has been found in meat or so-called ptomain-poisoning in the United States.

Morphology and Staining.— Bacillus enteritidis resembles B. coli morphologically. The organism is short and thick, sometimes with a thin capsule, motile by means of numerous or few flagella. It does not produce spores. It stains well or irregularly with the anilin dyes, and is gram-negative.

Isolation and Culture.—The organism has been isolated directly from the blood-stream and the spleen, and from the intestinal contents by plate cultures. The cultural characters as reported vary with different authors, probably because different strains were studied. Colonies upon gelatin and agar resemble those of B. coli. Bouillon is clouded, a delicate pellicle may form, and in a few days a whitish sediment collects. A yellowish, glistening layer forms on potato, frequently turning brownish with age. Growth in milk seems to vary with the organism studied. Some have been described as coagulating milk, but the typical form does not, although a slow proteolysis may take place without coagulation.

Physiology.— B. enteritidis is aerobic and facultative anaerobic. Its optimum growth temperature is between 30

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.