EXPERIMENTS ON THE CONVERSION OF TYPHUS STRAINS
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INSTITUTO DE HIGIENE, POPOTLA, CD. MEXICO DF, MEX
HOSPITAL Y LABORATORIOS AMERICA, CD. MEXICO, DF, MEX
HOSPITAL Y LABORATORIOS AMERICA, CD. MEXICO, DF, MEX
Abstract
Two types of strains of typhus virus are observed in Mexico: first the murine type which is obtained from wild rats in nature, from isolated endemic cases, and from cases during short epidemic outbreaks, and second, the epidemic type of strains which is o