MMWR Morb Mortal Wkly Rep. 2011 Oct 21;60(41):1428.
On July 22, 2011, a pediatric infectious disease physician reported a culture-confirmed case of Yersinia enterocolitica infection to the Allegheny County Health Department (ACHD), Pennsylvania. Two additional cases in Allegheny County with onset around the same time were identified by Pennsylvania's version of the National Electronic Disease Surveillance System aberration detection algorithm, which routinely evaluates disease reports, searching for unusual events. During March-August for the 3-year period 2008-2010, three cases of Y. enterocolitica infection had been reported in Allegheny County and a total of five in southwestern Pennsylvania. Subsequent review of the surveillance data identified 16 culture-confirmed patients with symptom onset during March 24-August 5, 2011. Patients were aged 1-75 years (median: 26.5 years). Seven patients (44%) were hospitalized; three were admitted to an intensive care unit.
2011 年 7 月 22 日，宾夕法尼亚州阿勒格尼县卫生部门（ACHD）接到一位儿科传染病医生的报告，称确诊了一例耶尔森氏菌感染病例。宾夕法尼亚州国家电子疾病监测系统异常检测算法还发现了另外两例同时发生在阿勒格尼县的病例。该算法通常会评估疾病报告，寻找异常事件。在 2008-2010 年的 3 年期间，阿勒格尼县共报告了 3 例耶尔森氏菌感染病例，而在宾夕法尼亚州西南部共报告了 5 例。对监测数据的进一步审查确定了 16 例在 2011 年 3 月 24 日至 8 月 5 日期间发病的确诊患者。患者年龄为 1-75 岁（中位数：26.5 岁）。7 名患者（44%）住院；3 人住进了重症监护病房。
