[Bactericidal action of formalin on the causative agent of plague].

Ten per cent neutral formalin in a ratio 1 : 20 was demonstrated to be useful as a desinfecting and fixing substance in pathohistological examinations of organs and tissues animals infected with the causative agent of plague. With test-objects' volume of 1.0 cm3 the optimal period of exposure providing a permanent bactericidal effect is 24 hours, with volumes of 1.5 and 2.0 cm3-2 days. The fixing effect of formalin on tissues is exerted in 3-4 days.