Serotypes and drug susceptibilities of Staphylococcus aureus isolated from throat and nasal vestible on medical staffs and inpatients in P.R. China and Japan

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Abstract

To study the prevalence of Staphylococcus aureus on both the throat and nasal vestibles, samples were taken from 25 healthy medical staff members and 25 inpatients at 7 hospitals in P. R. China and at a hospital in Tokyo in 1996 and 1997. Isolated S. aureus were examined by coagulase typing, enterotoxin typing, and drug susceptibility against 23 antimicrobials. The results were as follows; 1) S. auerus was isolated from 4% to 25% of all subjects examined at 7 hospitals in P. R. China, showing a significantly lower rate than 42.5% at a hospital in Tokyo. 2) More S. aureus were isolated from healthy people, especially medical staff members than from inpatients. 3) The most prevalent coagulase type of S. aureus isolated in P. R. China, 1996 and 1997 was type VII, but their enterotoxin types were variable, indicating different sources of infections agents existing at the in hospitals. On the other hand, strains of coagulase type II with enterotoxin type C were the most prevalent at a hospital in Tokyo, showing the cross infections in a hospital. 4) S. aureus isolated in P. R. China were the most susceptible to imipenem and panipenem, and they were the least susceptible to tetracycline, erythromycin, roxithromycin and adithromycin. There were no strains of MRSA. On the other hand, 17 strains of S. aureus (40.8%) were MRSA at a hospital in Tokyo and those strains were susceptible to arbekacin and vancomycin. There was a great difference between drug susceptibility against strains from P. R. China and those from Tokyo. This difference seems to come from the difference in infectious diseases, the treatments, and the medical care systems in the respective countries. However, since China is rapidly introducing Western medicine, this report will serve as basic data for understanding future of drig resistance.

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Xiuhua, L., Goto, S., Murai, T., Kobayashi, A., Tsuji, A., Xishui, G., … Yuxiu, G. (1999). Serotypes and drug susceptibilities of Staphylococcus aureus isolated from throat and nasal vestible on medical staffs and inpatients in P.R. China and Japan. Japanese Journal of Chemotherapy, 47(10), 611–618.

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