Clinico-bacteriological study was performed in the surgical clinic of the 2nd Tokyo National Hospital on staphylococci isolated from the patients of puerperal breast abscess from 1957 to 1961, and investigated the vehicle of transmission relating to hospital staphylococci.
The results are as follows.
1) The proportion of antibiotic resistant staphylococci in 75 breast abscesses amounts to 89.3% to penicillin, 46.7% to streptomycin and 66.7% to tetracyclin. But, on the contrary, it is only 4% to chloramphenicol and 2.7% to erythromycin to kanamycin, sensitive of all. There are many double and triple resistance to antibiotics, especially to the combination of penicillin and tetracyclin.
2) In phage typing, typable strains are 66.7%, group j occupies 44%, and 79% of it is the type 80.
3) The term of treatment for complete cure prolongs in double and triple resistant, and in the phage type 80.
4) According to the research of the relationship between lesion's and nasopharyngeal staphylococci of the patients and their infants' equal strains are 60%, in 25% to 26.59% the strains in lesions coinside with the nasopharyngeal flora of the infants, in only one thirds the strains of lesions and that of nasopharyngeal strains are unanimous.
5) The carriage rate of coagulase-positive staphylococci on the staffs of the hospital, mothers and newborns in the obstetric unit are 48.9%, 41.3% and 42.3%. Comparing with the control they show highrates.
6) In these phage types, the untypable are most, while the type 80 are least. But surgical infections caused by type 80 are not always little, because the type 80 spreads fast,
7) As we expected beforehand there are many penicillin, streptomycin and tetracyclin resistant strains isolated from the infants in the hospital is remarkable in the babies as sameas lesion. This fact suggests that hospital staphylococci are important as pathogenic microorganism.
8) During this study, we found a case of breast abscess that was caused by hospital staphylococci transmitted to the newborn at hospitalization.
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