OBJECTIVES Primary pyomyositis is a bacterial infection of skeletal muscle first recognized in tropical regions of the world but needing characterization in temperate climates. METHODS This population-based study used the Healthcare Utilization Project/Nationwide Inpatient Sample database to characterize the trends of pyomyositis admissions in the United States from 2002-2014 using ICD-9 diagnostic codes. RESULTS We found a concerning more than three-fold increase in the incident pyomyositis admissions over our study period. The median length of stay was over twice as long compared to other hospitalized patients. Patients with pyomyositis were younger and more likely to be male and Black. There were more cases in the West and South compared to Midwest and Northeast. Age-adjusted odds ratios revealed significant association of pyomyositis with HIV, types 1 and 2 diabetes mellitus, hematologic malignancy, organ transplant, malnutrition, chronic kidney disease, obesity, and rheumatoid arthritis. The most commonly identified bacterial diagnosis was Staphylococcus aureus. Pseudomonas species were the most commonly identified gram-negative bacteria. CONCLUSION This nationwide review of pyomyositis in the United States suggests a concerning increase in incidence and provides information on the trends, demographics, risk factors, and causative organisms for pyomyositis in the United States.

中文翻译：

---

美国的脓性肌炎2002-2014。

目的原发性化脓性肌炎是骨骼肌的细菌感染，最早在世界热带地区得到认可，但需要在温带气候中表征。方法这项基于人群的研究使用《医疗保健利用项目/全国住院患者样本》数据库，使用ICD-9诊断代码对2002年至2014年美国化脓性肌炎住院人数的趋势进行了表征。结果我们发现，在我们的研究期间，脓毒症的发病率增加了三倍以上。住院时间的中位数是其他住院患者的两倍。化脓性肌炎患者较年轻，男性和黑人的可能性更高。与中西部和东北相比，西部和南部的病例更多。年龄调整后的优势比显示化脓性肌炎与HIV，1型和2型糖尿病，血液系统恶性肿瘤，器官移植，营养不良，慢性肾脏病，肥胖症和类风湿性关节炎有显着相关性。最常见的细菌诊断是金黄色葡萄球菌。假单胞菌种是最常见的革兰氏阴性菌。结论这项对美国的化脓性肌炎的全国性审查表明发病率显着增加，并提供了有关美国化脓性肌炎的趋势，人口统计学，危险因素和致病菌的信息。假单胞菌属物种是最常见的革兰氏阴性菌。结论这项对美国的化脓性肌炎的全国性审查表明发病率显着增加，并提供了有关美国化脓性肌炎的趋势，人口统计学，危险因素和致病菌的信息。假单胞菌种是最常见的革兰氏阴性菌。结论这项对美国的化脓性肌炎的全国性审查表明发病率显着增加，并提供了有关美国化脓性肌炎的趋势，人口统计学，危险因素和致病菌的信息。