PUBLIC HEALTH ORGANIZATION IN MEXICO
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Rockefeller Foundation, CD MEXICO, DF, MEX
Abstract
Widal tests were conducted on 3147 blood samples sent to the laboratory for Wassermann tests Of the 3147, a total of 432 (137%) gave positive Widal reactions at a dilution of 1-80 or higher 130 reacted at 1-80; 174 at 1-120 and 24 at 1-640