• P Quincy Moore, Joseph Weber, Steven Cina, and Steven Aks.
• 1900 W Polk St., 10th Floor, Administration Building, Chicago, IL 60612, USA. Electronic address: moore.quincy@gmail.com.
• Am J Emerg Med. 2017 Nov 1; 35 (11): 1706-1708.

ObjectiveDescribe surveillance data from three existing surveillance systems during an unexpected fentanyl outbreak in a large metropolitan area.MethodsWe performed a retrospective analysis of three data sets: Chicago Fire Department EMS, Cook County Medical Examiner, and Illinois Poison Center. Each included data from January 1, 2015 through December 31, 2015. EMS data included all EMS responses in Chicago, Illinois, for suspected opioid overdose in which naloxone was administered and EMS personnel documented other criteria indicative of opioid overdose. Medical Examiner data included all deaths in Cook County, Illinois, related to heroin, fentanyl or both. Illinois Poison Center data included all calls in Chicago, Illinois, related to fentanyl, heroin, and other prescription opioids. Descriptive statistics using Microsoft Excel® were used to analyze the data and create figures.ResultsWe identified a spike in opioid-related EMS responses during an 11-day period from September 30-October 10, 2015. Medical Examiner data showed an increase in both fentanyl and mixed fentanyl/heroin related deaths during the months of September and October, 2015 (375% and 550% above the median, respectively.) Illinois Poison Center data showed no significant increase in heroin, fentanyl, or other opioid-related calls during September and October 2015.ConclusionOur data suggests that EMS data is an effective real-time surveillance mechanism for changes in the rate of opioid overdoses. Medical Examiner's data was found to be valuable for confirmation of EMS surveillance data and identification of specific intoxicants. Poison Center data did not correlate with EMS or Medical Examiner data.Copyright © 2017 Elsevier Inc. All rights reserved.

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