Técnicas para el diagnóstico de laboratorio del tifo y otras rickettsiasis

ABSTRACT

On the occasion of the first Inter-American Typhus Meeting held in Mexico on October 1945, the Pan American Typhus Commission discussed the methods for the diagnosis of typhus and advised that a preliminary test should be recommended using Castaneda's blue X-19 antigen and after this preliminary test the serum be sent to special laboratories for a differential test by complement fixation, using murine and classic rickettsial suspensions as antigens. Because of the necessity of uniform results, the X-19 antigen has to be prepared and delivered by the Typhus Laboratory of Mexico, until reliable laboratories take over the production. In case that it is produced elsewhere, samples of each lot must be sent to Dr. M. Ruiz Castaneda who shall inform periodically about the conditions of the antigen in order to discontinue its use in case of deterioration