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Unexplained Respiratory Disease Outbreaks (URDO)








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										All potential testing requires consultation with the appropriate CDC subject matter expert and CDC approval before shipping the specimens.
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			CDC’s approach to URDO investigationsWhen and how to request CDC assistanceDiagnostic tests and methods used at CDCRequirements for testing at CDC
CDC can assist health department personnel with investigating unexplained respiratory disease outbreaks (URDO).
The public should direct inquiries about respiratory diseases or outbreaks in general to CDC-INFO at 1-800-CDC-INFO, (800-232-4636), TTY: (888) 232-6348, or email CDC-INFO. Contact the relevant state or local health department with questions about specific outbreak investigations.
CDC’s approach to URDO investigations
CDC uses a multidisciplinary team approach to help local, state, and international public health officials in URDO investigations. More than 40 epidemiology and laboratory experts in infectious and non-infectious respiratory diseases make up the URDO work group.
When health departments request assistance, the URDO work group convenes to discuss possible causes with the requester. The work group also provides technical expertise and specialized resources that are often only available at CDC. Several CDC laboratories test specimens at the same time for a wide variety of viral, bacterial, and other pathogens. This allows the work group to quickly determine the cause of the outbreak and help prevent others from becoming ill.When and how to request CDC assistance
CDC staff are available to provide assistance to health departments and public health agencies during respiratory disease outbreaks when:
The causative agent has been identified prior to contacting CDC, but needs to be confirmed
More than one causative agent is suspected and epidemiological or laboratory assistance is needed
The etiology is unknownTo request assistance:
E-mail URDO (M-F; 8 am–4 pm EST)
Call the *emergency*, after-hours hotline at 770-488-7100Diagnostic tests and methods used at CDC
Need help identifying the right test for your needs? View CDC’s searchable Test Directory for
An up-to-date list of orderable tests
Information on specimen requirements
Contact information
Test turnaround times
Other supplemental informationRequirements for testing at CDC
Only state health departments and other federal agencies may submit specimens directly to CDC for pathogen detection and characterization. Private citizens, health practitioners, and hospital personnel must contact their local (city or county) or state health department about how and when to submit specimens for testing.
**All specimens sent to CDC require approval by the relevant state health departments and CDC prior to shipment.** All potential testing requires consultation with the appropriate CDC subject matter expert and CDC approval before shipping the specimens.Learn more about Specimen Collection and Handling.Top of Page
							
					
							Last Reviewed:  June 1, 2023						Source: 	National Center for Immunization and Respiratory Diseases, Division of Bacterial Diseases
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