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  • Title: Drug-resistant tuberculosis in the Dominican Republic: results of a nationwide survey.
    Author: Espinal MA, Báez J, Soriano G, Garcia V, Laszlo A, Reingold AL, Sanchez S.
    Journal: Int J Tuberc Lung Dis; 1998 Jun; 2(6):490-8. PubMed ID: 9626607.
    Abstract:
    SETTING: The Dominican Republic. OBJECTIVE: To assess the extent of drug-resistant tuberculosis (TB) following the guidelines of the World Health Organization (WHO)/International Union Against Tuberculosis and Lung Disease (IUATLD) new global surveillance project on drug resistance in TB. METHODS: Using a multi-step proportional weighted approach, a sample of 688 sequential cases of smear positive pulmonary TB diagnosed between April 1994 and April 1995 was studied in six of the country's eight health regions. Pre-treatment sputum samples were cultured on Loewenstein-Jensen medium and drug susceptibility tests were performed using the economic variant of the proportion method. RESULTS: Of 420 cases with drug susceptibility results, resistance to one or more drugs was observed in 43.8%; resistance was found in 52.1% of 117 TB cases with a history of previous antituberculosis treatment and in 40.6% of 303 new TB cases. In five of the six health regions surveyed, > or = 41% of strains were resistant to one or more drugs. Multidrug resistance (MDR) to isoniazid and rifampicin with or without resistance to other drugs was found in 43 (10.2%) of 420 cases, including 6.6% of new TB cases. In five of the six health regions > or = 8% of strains were classified as MDR. Independent predictors of MDR-TB included being in the age group 25 to 44 years (odds ratio [OR] = 4.2, 95% confidence interval [Cl] 1.5, 11.6; P = 0.005), being aged 45 years and over (OR = 4.5, 95% CI 1.4, 14.4; P = 0.009), and having a prior history of TB (OR = 3.7, 95% CI 1.9, 7.4; P = 0.0001). CONCLUSION: The proportion of Mycobacterium tuberculosis strains resistant to one or more anti-TB drugs in the Dominican Republic is among the highest observed world-wide. The severity of the problem urgently requires the full implementation of TB control strategies endorsed by the WHO and the IUATID, which include political commitment to a National TB Program, case detection utilizing sputum-smear microscopy, directly observed treatment, regular drug supply, and standardised recording and reporting systems. Also, the sale of TB drugs in the private market should be controlled.
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