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感染性脑膜炎(革兰氏染色)显示脑膜炎双球菌

显微镜下,中性粒细胞内可见的革兰氏染色阴性的双球菌,为脑膜炎奈瑟球菌。腰穿抽取脑液可进行革兰氏染色和细菌培养。许多细菌都可能引起脑膜炎,但是几种最常见,并且特定的年龄段发生的机率更大。如大肠杆菌、嗜血流感杆菌、脑膜炎奈瑟菌、肺炎链球菌。

Microscopically, a gram stain reveals gram negative diplococci within a neutrophil, typical for Neisseria meningitidis. Gram stain and culture can be performed on cerebrospinal fluid obtained via lumbar puncture. A variety of bacteria can cause meningitis, but several are more common, and have an incidence more frequent at certain ages:
ORGANISM PEAK AGE INCIDENCE GRAM STAIN
Escherichia coli Neonates Gram negative rods
Hemophilus influenzae Infants and Children Gram negative coccobacilli
Neisseria meningitidis Adolescents and Young adults Gram negative diplococci
Streptococcus pneumoniae Older adults or Children Gram positive cocci in chains

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