1Neu HC. The crisis in antibiotic resistance. Science 1992;257:1064 -73.
2Iseman MD. Evolution of drug-resistant tuberculosis: a tale of two species. Proc Natl Acad Sci U S A 1994;91:2428-9.
3Braden CR, Onorato IM, Kent JH. Tuberculosis epidemi-ology-United States. In: Rom WN. Garay S, editors.Tuberculosis. lst ed. New York Little. Brown and Company: 1996, p. 85-97.
4Hobby GL.Primary drug resistance in tuberculosis:a review.Am Rev Respir Dis 1962;86:839-46.
5Bloch AB, Cauthen GM, Onorato IM, et al. Nationwide survey of drug-resistant tuberculosis in the United States.JAMA 1994,271:665-71.
6Frieden TR,Sterling T,Pablos-Medez A et al.The emergence of drug-gresistant tuberculosis in New York City.N Engl J Med 1993,328:521-6.
