Clinical and bacteriological studies, including sensitivity tests, of 85 patients is pyodermas such as impetigo cbntagiosa, pustular acne vulgaris, hair follicle and sweat gland infections, and secondary pyogenic infections superimposed on primary dermatoseswere carried out during 4 months period, from June 1970 to Sept.1970, at department of dermatology, school of medicine, Seoul national. university.
The results were as follows;
1) Predominant age group of impetigo was the preschool ages (87%).
2) Causative agents of impetigo in our 30 cases were coagulase positive staphylococcus aureus only in 27, streptococcus only in 0 and both organisms in 3 (one case was mixed infection with s. aureus and P-hemolytic streptococcus, and two were mixed infections with s. aureus and a-hemolytic streptococcus).
3) Culturing from 12 cases of pustular acne vulgaris, we found coagulase negative staphylococcus albus in 9, coagulase positive staphylococcus aureus in 1 and no growth in 2.
4) In 35 cases of hair follicle and sweat gland infections, we isolated coagulase positive staphylococcus aureus only in 32, coagulase negative staphylococcus albus only in 2, and mixed infection with staphylococcus aureus and A-hemolytic streptococcus in 1.
5) Isolated organisms in 8 cases of secondary pyogenic infections superimposed on primary dermatoses were coagulase positive staphylococcus aureus only in 2, coagulasenegative staphylococcus albus only in 1, Q-hemolytic streptococcus only in 1, a-hemolytic streptococcus only in 1, and mixed infections with various combination in 3.
6) Results of sensitivity tests with isolated organisms in the above diseases groups
were as follows;
(a) Total 66 strains of coagulase positive staphylococcus aureus showed resistance to ampicillin in 97.0% penicillin in 78.8%, terramycin in 72.7%, rizynomycin in 71.2%, streptomycin in 24.1%, chloramphenicol in 16.7%, neomycin in 12.1%, kanamycin in 4.5% and leukomycin in 1.5%.
(b) Total 8 strains of hemolytic streptococci were sensitive to chloramphenicol, leukomycin and penicillin.
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