Educational Content: This article is for informational purposes only and does not constitute medical advice. Always consult a healthcare provider for diagnosis and treatment.
Definition of HTLV-I
Medically reviewed by Min Clinic Staff | Updated: January 2026
HTLV-I: Human T-lymphotropic virus type I, often referred to simply as the human T-lymphotropic virus (HTLV).
HTLV-II stands for human T-lymphotropic virus type II, which is closely related to HTLV-I.
HTLV-III is now known as the human immunodeficiency virus or HIV.