| 1. | The aortic valve demonstrates a large , irregular , reddish tan vegetation . virulent organisms , such as staphylococcus aureus , produce an " acute " bacterial endocarditis , while some organisms such as streptococcus viridans produce a " subacute " bacterial endocarditis
毒力强的细菌，如金黄*色葡萄球菌，引起“性细菌性心内膜炎，而一些毒力较弱的细菌，如草绿色链球菌，则引起亚急性细菌性心内膜炎。 |
