Roongnapa PracharktamKanung AngkananukoolAsda VibhagoolMahidol University2018-09-072018-09-072001-09-01Journal of the Medical Association of Thailand. Vol.84, No.9 (2001), 1241-1245012522082-s2.0-0035708768https://repository.li.mahidol.ac.th/handle/20.500.14594/26718Antituberculous drugs for current therapy of multidrugs resistant tuberculosis (MDR-TB) are limited. The in vitro susceptibility of Mycobacterium tuberculosis (MTB) as well as MDRTB with other antibiotic drugs were determined in order to find alternative drugs for the treatment of MDR-TB. Forty-seven MDR-TB and 62 MTB of clinical isolates were tested against levofloxacin and ofloxacin. The MDR-TB at the MIC90 of levofloxacin and ofloxcain were 1 μg/ml and 2 μg/ml, respectively. Of these MTB, the MIC90 of both drugs were 0.5 μg/ml and 1 μg/ml, respectively. It seemed that levofloxacin MICs of both MDR-TB and MTB were one dilution less than ofloxcin. The promising activity of ofloxacin and levofloxacin against MDRTB and MTB suggest that both drugs could be used as second-line drugs for MDR-TB or as a good alternative antituberculous drug for patients who have intolerance to the first line drug.Mahidol UniversityMedicineArticleSCOPUS