金黄色葡萄球菌 Figure 18.1 Figure 18.2 Scanning electron micrograph of Blood agar plate growing S.aureus.Some strains show two zor Staplrylococcs aureus (x7,500).This hemolysis.The relatively clearer inner zone is caused by a-tox genus owes its name to the grapelike the outer zone is fuzzy and appears only if the plate has been re Gr.tapyle)appearance of the cluster This outer zone is the B.or"hot-cold,"hemolysin. Staphylococci Intiltrating granulocytes (phagocytes) Core of pus b ⊙ Figure 18.3 Cutaneous lesions of S.aureus.Fundamentally,all are skin abscesses that vary in size.depth.and degree of tissue involvement. ()Sectional view of a boil or furuncle,a single pustule that develops in a hair follicle or gland and is the classic lesion of the species.The inflamed infection site becomes abscessed when masses of phagocytes.bacteria.and fluid are walled off by fibrin 7 (b)A furuncle on the back of the hand.(A carbuncle on the back of the neck.Carbuncles are massive deep lesions that result from multiple,interconnecting furuncles.Swelling and rupture into the surrounding tissues can be marked. 心课程 《微生物的世界》7 上海交通大学通识教育核心课程《微生物的世界》 金黄色葡萄球菌