6Mutnick AH. Rhomberg PR, Sader HS,et al. Antimicrobial usage and resistance trend relationships from the MYSTIC Programme in North America ( 1999 - 2001 )[J]. J Antimicrob Chemother. 211114,53 ( 2 ) : 290- 296.
7von Gottberg A, Klugman KP, Cohen C, et al. Emergence of levofloxacin-non-susceptible Streptococcus pneumoniae and treatment for multidrug resistant tuberculosis in children in South Africa: a cohort observational surveillance study[J].Lancet,2008,371 (9618) : 1108-1113.
8http://www. whocc. no/atcddd/ndexdatabase/.
9Goldmann DA, Weinstein RA, Wenzel RP, et al. Strategies to prevent and control the emergence and spread of antimicrobialresistant microorganisms in hospitals[J]. A challenge to hospital leadership. JAMA, 1996,275(3) :234-240.