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The type distribution of salmonella has been investigated in detail either in the United States of America or in various European countries. In Japan, however, only very few informations related to this subject have been available even in the recent years. Furthermore, even individual reports on the isolation of various types of salmonella are very scanty. In order to fill this gap, the present paper was prepared to furnish an information on the types of the strains of salmonella forwarded to us for type identification from each place in this country, where the strains have been isolated during the year 1951. The results of our examinations are summarized in Table 1. The total number of strains identified counts 91, which were classified into 11 types. Among them, 27 strains were derived from 3 outbreaks of salmonellosis, and 10 strains from 9 sporadic cases. As for the remainitig 54 strains, it is not clear whether type were derived from sporadic cases or epidemic outbreaks. Detailed descriptions of each type of the organisms are made as follows : Salmonella paratyphi B: All strains of this type of salmonella ware isolated from, an outbreak of food poisoning in April, 1951, which was, however, diagnosed as a dysenteric outbreak. The symptoms of cases in this outbreak simulated those of food poisoning and there was no case recognized showing the symptoms of enteric fever. Salmonella typhi-murium: The strains of this organism were isolated from an outbreak of food poisoning in April, 1951, in a family in the

TYPES OF SALMONELLA ISOLATED AND IDENTIFIED DURING THE YEAR 1951 IN OUR LABORATORY