Abstract
A total of 592 persons were admitted to the DECCM, Nippon Medical School, over a 28-month period from January, 1982, to April, 1984. 197 strains of Staphylococcus aureus were detected in seventy-seven of them. These strains were examined for any relationship they might have with hospital infection. The results obtained are summarized as follows.
1) Staphylococcal detection was positive in 197 of 6, 813 samples examined, giving a rate of positive detection of 2.9%. Staphylococci were relatively abundant in samples of pus, sputum, and burnt skin, but urine was perfectly free from staphylococci.
2) Coagulase types were identified in 92.4% of the 197 strains detected, Type IV was found in 62.4%, type VII in 11.5%, type II in 7.1%, and type III in 7.1%.
3) The rate of strains presenting a resistance to drugs at a concentration of 100 μg/ml or more to the 197 strais was 60.9% to CZE. 44.7% to PIPC, and less than 10% to CEZ, CMZ, and MET.
4) Phage type were identified in 75.6% of the 197 strains. Group III was found in 35.0%, the mixed group in 19.3%, the miscellaneous group in 10.796, group I in less than 10.0%, and group II in less than 10.0%.
5) Persons who were admitted to the DECCM during almost the same period were examined for the properties of Staphylococcus aureus strains detected. As a result, there was a strong tendency for the properties of strains detected relatively late in some of these people to be the same as those of strains detected relatively early in the others. These results seem to indicate the special characteristic of hospital infection.
