2Nicolle LE. Urinary tract infection in the elderly[J]. Journal of Antimicrobial Chemotherapy,1994, 33(Suppl. A) :99-109.
3Nicolle L. Urinary tract injection in long-term care facility residents[J]. ClinInfect Dis, 2000, 311: 757-761.
4Foxman B. Epidemiology of urinary tract infections: incidence, morbidity and economic costs[J]. Am J Med,2002,113 : 5-13.
5Ogata K. Association between natural killer cell activity and infection in immunologically normal elderly people[J]. Clin Exp Immunol, 2001,124 : 392-397.