The ability of some known antibiotics such as streptothricin, streptomycin, and clavacin to prevent bacteriophage action has been demonstrated (Jones, 1945). Schatz and Plager (1948), working with an actinomycete that demonstrated antiphage activity, extracted a material that was capable of weakly inhibiting a rodent-paralyzing virus (MM), but it appeared to be too toxic for further study. We have isolated a substance from Aspergillus sp. that was capable

The prevalence of thyroid dysfunction was investigated in a small, rural community located at the coast in Middle Norway. Two hundred persons (114 women and 86 men) of the total 802 persons over 70 Tunbridge W M G (1979): The epidemiology of hypo¬ thyroidism. J Clin Endocrinol Metab 8: 21 -27. Tunbridge W M G, Evered D C, Hall R et al. (1977): The spectrum of thyroid disease in a community: the Wickham survey. Clin Endocrinol (Oxf) 7: 481-493.

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