Manion, R. E. (Veterans Administration Hospital, Minneapolis, Minn.), S. G. Bradley, H. H. Zinneman, and W. H. Hall. Interrelationships among mycobacteria and nocardiae. J. Bacteriol. 87:1056-1859. 1964.-A total of 134 strains of mycobacteria and nocardiae were tested for susceptibility of 24 mycobacteriophages. On the basis of capability of diverse strains to serve as alternative propagating hosts for particular viruses, relationships among the actinomycetes were proposed. Cultures received as Mycobacterium smegmatis, M. ranae, M. butyricum, and M. chelonei were nearly identical, indicating that they are members of a single taxon. M. phlei and M. fortuitum strains constituted two distinct but related groups. Moreover, strains of M. smegmatis and Nocardia asteroides were susceptible to two variant actinophages originally isolated on N. brasiliensis.

Bacteriophage Typing↗

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The role of hydrophobic bonding in the thermoprecipitation of a pyroglobulin.

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Aged↗

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Circadian rhythms in polyamine excretion by rats bearing an immunocytoma.

Large-amplitude circadian rhythms were observed in the urinary excretion of polyamines by rats bearing an immunocytoma. Control animals excreted polyamines at a lower rate but also with marked circadian variation. In confirmation of earlier observations, light-chain excretion by the tumor-bearing rats also exhibited a circadian rhythm, superimposed on an increasing trend. The potential of these rhythms as markers for the chronotherapy of cancer is noted.

Animals↗