salmonella typhimurium鼠伤寒沙门氏菌scarlet fever猩红热schistosomiasis血吸虫病schizont裂殖体septicemia败血症septic shock感染性休克Shwartzman's reaction施瓦茨曼反应Schick’s test锡克试验smallpox天花sodium antimony subgallate没食子酸锑钠source of infection传染源spirochetemia螺旋体血症sterillization消毒street virus街毒subacute scletosing panencephalitis(SSPE)亚急性硬化性全脑炎subclinical infection亚临床感染subtertain malaria恶性疟sudden infant death syndrome(SIDS)婴儿猝死综合征superinfection重复感染supportive treatment支持疗法susceptibility of masses人群易感性syphilis梅毒