Laboratory Scientists

As of 3/20/2023, the following tests are back online:

  • CDC 10234: Parasites: Morphologic Identification
  • CDC 10238: Leishmania Species Identification
  • CDC-10239 Trichomonas Susceptibility (newly added)
  • CDC-10456 Babesia serology
  • CDC 10457: Baylisascariasis Serology
  • CDC 10458: Chagas Disease Serology
  • CDC 10459: Cysticercosis Serology
  • CDC-10460​: Echinococcosis Serology
  • CDC-10462: Filariasis Serology
  • CDC 10465: Paragonimiasis Serology
  • CDC 10466: Schistosomiasis Serology
  • CDC 10467: Strongyloidiasis Serology
  • CDC-10473 Babesia Molecular Detection
  • CDC 10475: Chagas Disease Molecular Detection
  • CDC-10480 Malaria Molecular Identification
  • CDC 10505: Fascioliasis Serology
  • CDC 10520: Malaria: Morphological Identification

Each test request (order) requires preapproval by the CDC Parasitic Diseases Branch. Please contact to request preapproval to submit specimens. The preapproval for your request will include important details about current submission requirements and forms.

Some assays for detection of parasitic diseases at CDC remain offline. We are working to restart additional testing as soon as possible for each test and will update this communication as soon as we are able.

CDC offers consultation to healthcare providers in the absence of diagnostic testing. Healthcare providers needing assistance with diagnosis or management of suspected cases of parasitic diseases may contact CDC’s Parasitic Diseases Hotline at (404) 718-4745, or e-mail

CDC microbiologist

A CDC microbiologist using immunological tests to diagnose parasitic infections.
(CDC Photo)

The Parasitic Diseases Branch conducts laboratory research that contributes to the overall mission to prevent and control parasitic diseases, both domestically and internationally. Scientists in the Branch:

  • Identify and characterize new disease-causing parasites using DNA analyses and genomics;
  • Study the natural cycles of parasite transmission and infection in humans and animals;
  • Study the immune response to parasitic infections; and
  • Examine the responses in infected people to confirm successful cures in patients.

Scientists also are investigating the processes that parasites use to infect and cause disease in people and animals and the ways parasites become resistant to methods of treatment and prevention.


Diagnostic Services
CDC microbiologist reviewing a telediagnosis request

A CDC microbiologist reviewing a telediagnosis request.
(CDC Photo)

In addition to innovative research projects, the Branch provides reference diagnostic services to public health partners worldwide who have difficulty diagnosing parasitic infections. This unit serves as a final reference laboratory for state public health departments and laboratories in the private sector. Our reference diagnostic services include telediagnosis, morphology, serology, molecular testing, and Trichomonas antimicrobial susceptibility testing.

More on: Available Tests [DPDx]

When a laboratory requests assistance in identifying a parasitic organism or for confirmation of a presumed diagnosis and have access to a digital camera, Branch staff can use telediagnosis to help. Telediagnosis involves the e-mail transmission of data, such as digital images of human tissue, to the CDC. Branch staff responses to these inquiries can be provided in a matter of minutes to hours. If you are a laboratory scientist or a pathologist and want to utilize our telediagnosis assistance*, please visit the Diagnostic Assistance section on the DPDx Website.

*Telediagnosis assistance is available to health professionals such as laboratorians and pathologists. Through the use of telediagnosis, CDC can provide rapid diagnostic feedback for cases of parasitic infections. However, if you have an urgent case, please do not delay case management.

CDC scientist reviews real-time PCR results

A CDC scientist reviews real-time PCR results.
(CDC Photo)

Our diagnostic laboratories offer DNA-based testing on a variety of clinical specimens, including stool, blood, tissue, and exudates. Selected PCR-based tests are available in our reference diagnostic laboratory for the species identification of parasites for cases in which morphologic examinations are unclear and further DNA molecular analysis is necessary.


More on: DPDx: Laboratory Identification of Parasites of Public Health Concern