坏死性筋膜炎

关于坏死性筋膜炎发病率和患病率的绝对数据缺乏。I 型（厌氧-兼性厌氧茵混合感染所致）坏死性筋膜炎比 II 型坏死性筋膜炎更常见。[2]Childers BJ, Potyondy LD, Nachreiner R, et al. Necrotizing fasciitis: a fourteen-year retrospective study of 163 consecutive patients. Am Surg. 2002 Feb;68(2):109-16. II 型坏死性筋膜炎使约 7.5% 的侵袭性 A 族链球菌感染变得更加复杂，估计发生率为 3.6/1,000,000。[8]Centers for Disease Control and Prevention. Active bacterial core surveillance report. Emerging Infections Program Network: group A streptococcus, 2015. Mar 2017 [internet publication].https://www.cdc.gov/abcs/reports-findings/survreports/gas15.html 坏死性筋膜炎的患病率或发病率没有升高或下降的趋势，也没有证据表明其存在全球流行病学方面的差异。