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  • Title: [Clinical research on multi-drug resistant and extensive drug-resistant tuberculosis in Japan].
    Author: Toyota E, Kawabe Y, Yotsumoto H, Sakatani M, Tsuyuguchi K, Maekura R, Fujikawa K, Takashima T, Ogawa K, Yoshiyama T, Sugie T.
    Journal: Kekkaku; 2008 Dec; 83(12):773-7. PubMed ID: 19172822.
    Abstract:
    PURPOSE: To know the number of patients with MDR-TB and XDR-TB newly diagnosed annually and the number of those with continuously culture-positive in spite of continued treatment. METHODS: To fill the questionnaire sent to all the TB hospitals in Japan and to investigate the number of beds for TB, MDR-TB cases newly admitted to each hospital in 2006 and chronic bacillary cases in spite of continued treatment. RESULT: We sent the questionnaires to all the TB hospitals in Japan and 81% of 270 hospitals replied. As the result, 93 MDR-TB were newly hospitalized (12 cases were with XDR-TB). 76 cases of them were newly diagnosed MDR-TB. Almost after 1 year treatment, patients with XDR-TB showed lower negative conversion rate than other MDR-TB (42.9% vs 63.8%) and higher fatality rate (42.9% vs 7.2%). Excluding above 93 new MDR-TB cases, 103 cases with chronic MDR-TB including 44 cases with XDR-TB had been treated during the observation period, 84 case had been hospitalized and other 19 cases at OPD. DISCUSSION: Since 2000, extensive multi-resistant (XDR) TB has been a global topic. In Japan, nation-wide survey on 2002 showed the ratio of MDR and XDR were 1.9% and 0.6% respectively out of 3122 TB stains investigated. XDR/MDR rate was higher than those in other countries. Our clinical based investigation showed total XDR/MDR rate was 28.6% (56/196) and it was similar to that of previous bacteriological survey in 2002. CONCLUSION: We investigated the number of patients with MDR-TB and XDR-TB newly diagnosed in 2006 and the number of those who were continuously culture-positive. The survey showed that there were 196 patients with MDR-TB, and 56 patients of them (28.6%) were with XDR-TB. Many of them were in the districts of Kinki area and Kanto-Shinetsu area and 70% of them had been treated in the hospitals belonging to the National Hospital Organization.
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