Host Influence on Upper Respiratory Flora

Abstract
THE study of the spread of bacterial pathogens in a free-living human population presents obvious difficulties. We have considered that a practical method was, first, to determine some common endemic pathogens in a given population and, secondly, to observe the incidence and concentration of these organisms in the members of a group of families over a given period.If an organism, once introduced into the family group, were found to be present in approximately equal quantities and with equal frequency in all members, we should assume that no host factors influenced colonization. If, however, the organism, once introduced, were found . . .

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