title: Drug resistance rates of Mycobacterium tuberculosis at a private referral center in Korea.
abstract: The goals of this study were to identify first-line drug resistance in new and previously treated tuberculosis (TB) cases and to determine risk factors for multidrug resistant TB (MDR-TB) at a private referral center in Korea. All patients with culture confirmed pulmonary TB over a 2-yr period between July 2002 and June 2004 were prospectively included in this study. In total, 637 patients were included; 512 (80.4%) were new cases, and 125 (19.6%) were previously treated cases. Resistance to at least one first-line drug was identified in 11.7% of new cases and 41.6% of previously treated cases. MDR-TB was detected in 3.9% of new cases and 27.2% of previously treated cases. The proportion of extensively drug-resistant TB among MDR-TB patients was 16.7% (9/54). Factors associated with MDR-TB included age under 45 yr, previous TB treatment, and the presence of cavitation on chest radiography. Rates of first-line drug resistance are high, particularly in previously treated patients, in the private sector in Korea. This underscores the need for an improved control program, coupled with early diagnosis of MDR-TB, to reduce the spread and development of resistance.
authors.affiliation: Division of Pulmonary and Critical Care Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
authors.forename: Jae Chol
authors.initials: JC
authors.lastname: Choi
authors.forename: Song Yong
authors.initials: SY
authors.lastname: Lim
authors.forename: Gee Young
authors.initials: GY
authors.lastname: Suh
authors.forename: Man Pyo
authors.initials: MP
authors.lastname: Chung
authors.forename: Hojoong
authors.initials: H
authors.lastname: Kim
authors.forename: O Jung
authors.initials: OJ
authors.lastname: Kwon
authors.forename: Nam Yong
authors.initials: NY
authors.lastname: Lee
authors.forename: Young Kil
authors.initials: YK
authors.lastname: Park
authors.forename: Gil Han
authors.initials: GH
authors.lastname: Bai
authors.forename: Won Jung
authors.initials: WJ
authors.lastname: Koh
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D000995:Antitubercular Agents / Q000494:pharmacology / Q000627:therapeutic use; D024881:Drug Resistance, Bacterial; D018432:Drug Resistance, Multiple; D005260:Female; D006761:Hospitals / Q000706:statistics & numerical data; D006801:Humans; D007723:Korea / Q000453:epidemiology; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D009169:Mycobacterium tuberculosis / Q000187:drug effects*; D011446:Prospective Studies; D012017:Referral and Consultation; D012307:Risk Factors; D018088:Tuberculosis, Multidrug-Resistant / Q000188:drug therapy* / Q000453:epidemiology / Q000382:microbiology; D014397:Tuberculosis, Pulmonary / Q000188:drug therapy* / Q000382:microbiology
chemical_list: D000995:Antitubercular Agents