Incidence and Characteristics of Beta Radiation Survivors (Escherichia coli)

Koh, Won Young; Morehouse, Catherine T.; Chandler, Velma L.

doi:10.1128/aem.4.3.153-155.1956

Applied Microbiology

1956

DOI: 10.1128/aem.4.3.153-155.1956

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Incidence and Characteristics of Beta Radiation Survivors (Escherichia coli)

Won Young Koh¹,

Catherine T. Morehouse²,

Velma L. Chandler³

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1961

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Cited by 3 publications

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References 7 publications

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“…Several investigators have attempted to produce resistant mutants by ionizing radiation. Pepper, Buffa, and Chandler (1956), using spores of Clostridium sporogenes and Bacillus pumilus, and Koh, Morehouse, and Chandler (1956), using Escherichia coli, were unsuccessful in their attempts, whereas Gaden and Henley (1953) and Erdman, Thatcher, and MacQueen (1961) suc-1 Present address: Physical Biology Laboratory, Biology Department, Illinois Institute of Technology, Chicago. ceeded in increasing the resistance of E. coli.…”

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Survival of Clostridium botulinum Spores

Anellis¹,

Grecz²,

Berkowitz³

1965

Applied Microbiology

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Radiation survival curves of spores of Clostridium botulinum strain 33A exhibited an exponential reduction which accounted for most of the population, followed by a "tail" comprising a very small residual number [7 to 0.7 spore(s) per ml] which resisted death in the range between 3.0 and 9.0 Mrad dose levels. The "tail" was not caused by protective spore substances released into the suspensions during irradiation, by the presence of accumulated radiation "inactivated" spores, or by heat shock of pre-irradiated spores. The theoretical number of spore targets which must be inactivated by irradiation was estimated both by a graphical and by a computation method to be about 80, and the D value was calculated to be 0.295 and 0.396 Mrad, respectively, in buffer and in pork pea broth.

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mentioning

confidence: 99%

Survival of Clostridium botulinum Spores

Anellis¹,

Grecz²,

Berkowitz³

1965

Applied Microbiology

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Inhibition of viability of microorganisms in [18F]-labeled radiopharmaceuticals

Jörg¹,

Fosselmann²,

Leis³

et al. 2017

Nuclear Medicine and Biology

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Studies on the Irradiation of Microorganisms in Relation to Food Preservation: Ii. Irradiation Resistant Mutants

Erdman¹,

Thatcher²,

MacQueen³

1961

Can. J. Microbiol.

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Using a Co60 source, repeated irradiation of survivors of bacterial cultures at a level initially destroying a high proportion of cells gave rise to strains which were more resistant to irradiation than the original cultures. Development of resistance was shown in single strains of Escherichia coli, Streptococcus faecalis, and Clostridium botulinum type A, and in one of three strains of Staphylococcus aureus, but not in two strains of C. botulinum type E nor in Salmonella gallinarum. Changes were noted in phage patterns of the staphylococci, biochemical characteristics of E. coli, and toxin production of C. botulinum in response to repeated irradiation.Irradiation of parent and resistant cultures at −78 °C did not change their comparative resistance, though each was afforded some protection at this temperature. These findings suggest that the induced resistance is an expression of resistance to the primary effect of irradiation and not to possible toxic substances formed by free-radical interaction.

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Incidence and Characteristics of Beta Radiation Survivors (Escherichia coli)

Cited by 3 publications

References 7 publications

Survival of Clostridium botulinum Spores

Survival of Clostridium botulinum Spores

Inhibition of viability of microorganisms in [18F]-labeled radiopharmaceuticals

Studies on the Irradiation of Microorganisms in Relation to Food Preservation: Ii. Irradiation Resistant Mutants

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