KILLING EFFECT OF $sup 60$Co GAMMA RAYS AND ACQUIRED RESISTANCE OF BACILLUS ANTHRACIS BY SUCESSIVE IRRADIATION
Journal Article
·
· Natl. Inst. Animal Health Quart.
OSTI ID:4748349
The survival curves of Bacillus anthracis and B. cereus spores after exposure to gamma -irradiation were of sigmoid type. The perfectly lethal dosage of gamma -rays was 180 x 10/sup 4/ r in B. anthracis and 210 x 10/sup 4/ r in B. cereus. The killing effect was dependent upon the dose rate and showed a tendency to lessen in the condition of high dose rate. The resistance of these organisms to gamma -rays was increased by successive irradiations. The perfectly lethal dosage at the 50th generation was at least 300 x 10/sup 4/ r. Generally in resistant strains, protein hydrolysis and capsule-forming ability were reduced and the virulence of a virulent strain decreased. (auth)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-17-015718
- OSTI ID:
- 4748349
- Journal Information:
- Natl. Inst. Animal Health Quart., Journal Name: Natl. Inst. Animal Health Quart. Vol. Vol: 2
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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