Annual screening for latent tuberculosis in healthcare workers: No longer required

Phlebotomy webinar

Expires: August 18, 2023


This "Phlebotomy Webinar" presentation will review the methods available to detect latent infection with Mycobacterium tuberculosis, or latent tuberculosis infection (LTBI), including the classic tuberculin skin test and the more recently developed interferon gamma release assays (IGRA). The advantages and limitations of each of these methods will be discussed and the latest recommendations on their use will be presented. This will include a discussion of recent recommendations by the Centers for Disease Control and Prevention on routine screening of health care workers for LTBI using IGRAs.


Video length: 55 min


Photo of Elitza Theel, Ph.D.

Elitza Theel, Ph.D., D(ABMM)

Director, Infectious Diseases Serology Laboratory

Professor, Laboratory Medicine and Pathology

Department of Laboratory Medicine and Pathology
Mayo Clinic, Rochester, Minnesota

Learning objectives

Upon completion of this activity, participants should be able to:

  • Review methods to detect LTBI
  • Compare and contrast the skin test versus interferon gamma release assays for detection of LTBI
  • Discuss role of IGRA for detection of LTBI in health care workers
  • Describe current recommendations for use of IGRA in the U.S.

Intended audience

This series is appropriate for phlebotomists, phlebotomy managers, phlebotomy educators, and other patient-care staff involved in specimen collection.


The following types of credit are offered for this event:


Mayo Clinic Laboratories is approved as a provider of continuing education programs in the Clinical Laboratory Sciences by the ASCLS P.A.C.E.® program. This program has been approved for a maximum of 1.0 P.A.C.E.® contact hour.

State of California

Mayo Clinic Laboratories is approved as a Continuing Education Accrediting Agency for Clinical Laboratory Sciences for the State of California. This program has been approved for 1.0 contact hour.

State of Florida

Mayo Clinic Laboratories is approved as a Continuing Education Accrediting Agency for the Clinical Laboratory Sciences for the State of Florida. Florida Board of Clinical Laboratory Personnel has designated this program for Supervision/ Administration, Quality Control/ Quality Assurance credit. This program has been approved for 1.0 contact hour.

To obtain credit

1. Watch the video.

2. Complete the posttest and evaluation that launches immediately following the video.

3. Generate and print your certificate(s).

Level of instruction for this program is intermediate.

Faculty disclosure

Course director(s), planning committee, faculty, and all others who are in a position to control the content of this educational activity are required to disclose all relevant financial relationships with any commercial interest related to the subject matter of the educational activity. Safeguards against commercial bias have been put in place. Faculty members also will disclose any off-label and/or investigational use of pharmaceuticals or instruments discussed in their presentations. Disclosure of this information will be published in course materials so those participants in the activity may formulate their own judgments regarding the presentations.


Contact us:

MCL Education (@mmledu)

MCL Education

This post was developed by our Education and Technical Publications Team.