Beaman B L, Burnside J, Edwards B, Causey W
J Infect Dis. 1976 Sep;134(3):286-9. doi: 10.1093/infdis/134.3.286.
A survey of members of the Infectious Diseases Society of America indicated that nocardial infections are not rare. Probably between 500 and 1,000 cases are recognized in the United States each year, of which 85% are serious pulmonary or systemic infections. Although nocardial infections are usually opportunistic infections in the compromised host, at least 15% of the infections in this series occurred in patients without a definable predisposing condition. Nocardial infections occurred in a random geographic distribution within this country, with affected males outnumbering females by 3:1. Most patients were between the ages of 21 and 50 years; however, the age range was broad. The number and variety of infections caused by Nocardia species other than Nocardia species other than Nocardia asteroides have been underestimated. Between 8.6% and 18.8% of pulmonary-systemic infections in this series were caused by species of Nocardia other than N. asteroides.
美国传染病学会成员的一项调查表明，诺卡菌感染并不罕见。在美国，每年可能确诊500至1000例病例，其中85%为严重的肺部或全身性感染。虽然诺卡菌感染通常是免疫功能低下宿主的机会性感染，但该系列中至少15%的感染发生在无明确易感因素的患者中。在该国，诺卡菌感染的地理分布是随机的，受累男性与女性的比例为3:1。大多数患者年龄在21至50岁之间；然而，年龄范围很广。除星形诺卡菌外，其他诺卡菌属引起的感染数量和种类一直被低估。该系列中8.6%至18.8%的肺-系统性感染是由除星形诺卡菌以外的其他诺卡菌属引起的。
