Though the outbreak seemed small, the investigation took on urgency because the disease was serious, and health officials worried that it might indicate a new risk to other workers in meatpacking.

• 经管似乎是小暴发，调查还是迅速展开了。因为病情比较严重，卫生官员们担心这是肉类加工业工人新的疾病风险的先兆。