Human T-lymphotropic Virus Type 1-associated Myelopathy/tropical Spastic Paraparesis: Viral Load and Muscle Tone Are Correlated

Overview

Journal J Neurovirol

Publisher Springer

Specialties Microbiology
Neurology

Date 2006 Dec 13

PMID 17162662

Citations 3

Authors

J R Zunt

S M Montano

I Beck

J Ov Alarcon

L M Frenkel

C T Bautista

R Price

W T Longstreth

Affiliations

Soon will be listed here.

Abstract

Human T-lymphotropic virus type 1 (HTLV-1) infections are associated with varying degrees of HTLV-1 viral load and spasticity. Increased viral load is associated with higher risk of developing HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSP). The authors performed a cross-sectional study of 24 people with HAM/TSP in Lima, Perú, to determine if higher HTLV-1 viral load was correlated with increased muscle tone, measured with a device providing quantitative spasticity assessment (QSA). Median HTLV-1 viral load was 17.0 copies/100 peripheral blood mononuclear cells and QSA value was 39.9 Newton-meters/radian. HTLV-1 viral load was significantly correlated with QSA value (Spearman rho = .48, P = .02), suggesting viral load may play a role in expression of symptomatic neurologic disease. Longitudinal studies are needed to determine if treatments that reduce viral load will reduce muscle tone.

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