2CDC. Guidelines for infection control[J]. MMWR, 2005, 54(36): 893-897.
3Austrian R.Some observations on the pneumococcus and on the current status of pneumoccocal disease and prevention [J]. Eev Infect Dis, 1981, 3 (Suppl)S1-S17.
4Hofmann J, Cetron MS, Farlcy MM, et al. The prevalence of drugresistant Streptococcus pneumoniac in Atlanta[J]. N Engl J Med, 1995, 333 ( 8 ) : 481-486.
5Butler JC, Breiman RF, Lipman HB, et al. Serotype distribution of Streptococci pneumoniae infections among preschool children in the United States, 1978-1994: implication vaccine[J]. J Infect Dis, 1995, 171 (4): 885-889.