Credit: Daniel Gay
The US Food and Drug Administration (FDA) has approved the first supplemental test for human T-cell lymphotropic virus-I/II (HTLV-I/II).
The test, MP Diagnostics HTLV Blot 2.4, is a qualitative enzyme immunoassay intended for use as an additional, more specific test for human serum or plasma specimens that have previously tested positive for HTLV-I/II.
MP Diagnostics HTLV Blot 2.4 can confirm infection with HTLV and differentiate between HTLV-I and HTLV-II.
The HTLVs are a group of human retroviruses known to cause diseases such as adult T-cell leukemia/lymphoma and myelopathy. HTLV can be transmitted from person to person through breastfeeding, unprotected sexual contact, or transfusion of blood from an infected donor.
Therefore, the FDA requires that donated blood be tested for HTLV-I/II antibodies. Currently, there are 2 FDA-licensed screening tests for HTLV-I/II. If a test is positive, the donation is discarded, and the donor is notified of his or her deferral.
The MP Diagnostics HTLV Blot 2.4 can provide blood establishments with additional information to convey to the donor. Specifically, the test can confirm HTLV infection and determine which virus type is causing the infection, HTLV-I or HTLV-II.
“The approval of MP Diagnostics HTLV Blot 2.4 will help blood establishments better counsel donors who have had positive results on an FDA-licensed HTLV-I/II screening test,” said Karen Midthun, MD, director of the FDA’s Center for Biologics Evaluation and Research.
MP Diagnostics HTLV Blot 2.4 is manufactured by MP Biomedicals Asia Pacific Pte. Ltd. in Singapore, a company of MP Biomedicals LLC in Santa Ana, California. For more information on the test, visit the MP Biomedicals website.
