Methicillin and penicillin belong to the so-called " beta lactam" family of antibiotics.

甲氧西林和青霉素都属于所“β-”生素族。

" Staph aureus bacteria that carry these genes are therefore resistant to most beta lactam antibiotics."

“因此，携带这些基因金黄色葡萄球菌对大多数β-生素有耐药性。”