[Localization of Listeria in white mice].

A total of 115 albino mice were infected through venous, subcutaneous, and oral administration of a suspension of 32P-labeled Listeria organisms at the concentration of 1.5 billion microbial cells per cu. cm. Each day following inoculation as many as four animals on an average were investigated (up to 120th hour) for all of the routes of infection used. It was established that via venous application the Listeria organisms reached all viscera and the brain in highest numbers. The greatest localization of Listeria introduced venously and orally was found in the first 24 hours in the liver. The localization of the organisms in animals infected per os proved similar to that found with the venous route of inoculation, however, showing weaker intensity. Listeria were found in the brain regardless of the route of infection.