求翻译：即使有时体外药敏试验显示对某些第一代或第二代头孢菌素敏感，但临床治疗也往往失败。但是，近年来随着万古霉素中介金黄色葡萄球菌（VISA）的报道不断出现，将会出现某些感染无药可用的局面。因此，对万古霉素的使用也要慎重。MSSA则对大多数抗生素敏感，治疗难度相对低。有研究证明，抗菌药物长期使用比短期治疗后预防有更高的耐药危险度。是什么意思？

In vitro susceptibility testing sometimes shows even some first-generation or second generation cephalosporins sensitive, but often clinical treatment failure. However, in recent years with vancomycin-intermediate Staphylococcus aureus (VISA) reports continue to emerge, there will be no drugs availa

Even if in some cases outside of the body drugs Michael experiment has shown that for certain first-generation or second-generation cephalosporin-sensitive, but also often clinical treatment failure. However, in recent years, with 10,000 ancient erythromycin VISA intermediate Staphylococcus aureus (

Even if sometimes in vitro medicine sensitive experiment demonstration is sensitive to certain first generation of or the second generation of cephalosporin, but the clinical treatment also often is defeated.But, along with the eternal mildew usually intermediary golden yellow staphylococcus (VISA)

Even sometimes some drug sensitivity test in vitro showed first-or second-generation cephalosporins sensitive clinical treatment but also tend to fail. However, in recent years, with Vancomycin Intermediate Staphylococcus aureus (VISA) reports emerge, there will be some infection situation with no d