Detection of Edible Mushroom Species by Using Molecular Markers

Abstract

The author reviews the results and conclusions of many other workers concerning the various methods of case-finding in tuberculosis. The results of his own work in several rural counties in Minnesota are also reported. A survey of 20,720 school children and adults in 7 rural Minnesota counties showed a much greater incidence of disease among persons intimately exposed than in those who were only casually exposed. In another Minnesota county survey an effort was made to examine every member of 698 families in which there was or had been a case of tuberculosis. Of those tuberculin- tested, 50.2% reacted positively. 14 new cases and 21 old re-activated cases were found. The cost for each case found was 8159.14. This figure is considerably less than that reported by other workers in making school surveys.[long dash]The frequency of infection and disease in any age group varies directly with the degree and length of exposure to open tuberculosis. Not only the openly infectious cases must be found but also those in the minimal or noncontagious stage. Several workers believe case-finding in school children to be expensive and relatively unproductive. The % of active cases found among surveys of 635,000 school children and some college students reported by 16 investigators, varied from 0.08 to 1.6%. The latter % occurred in a college group. The author concludes, from his own ex-perience and surveys by other workers that the cheapest and most productive results in, eradicating tuberculosis are to be obtained by isolating the infectious cases and examining all intimately exposed contacts. || ABSTRACT AUTHORS: K. II. Pjuetze