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Published in: BMC Nephrology 1/2017

Open Access 01-12-2017 | Research article

Prevalence and risk factors for Human T-Lymphotropic Virus Type 1 (HTLV-1) among maintenance hemodialysis patients

Authors: Rilma F. S. Santos, Gildásio C. Conceição, Márcia S. Martins, Angiolina Kraychete, Maria A. C. Penalva, Edgar M. Carvalho, Antonio Alberto Lopes, Paulo Novis Rocha

Published in: BMC Nephrology | Issue 1/2017

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Abstract

Background

Infection with the human T-cell lymphotropic virus type 1 (HTLV-1), although asymptomatic in most cases, can lead to potentially grave consequences, such as adult T-cell leukemia-lymphoma and HTLV-1-associated myelopathy / tropical spastic paraparesis. Its prevalence varies widely across different populations and geographic regions. A population-based study in the city of Salvador, located in the Northeast region of Brazil, showed an overall prevalence of HTLV-1 seropositivity of 1.7%. Blood borne virus infections are recognized as important hazards for patients and staff in maintenance hemodialysis (MHD) units but most studies focus on hepatitis B, hepatitis C and human immunodeficiency viruses. There are scarce data about HTLV-1 infection in the MHD population. We aimed to determine the prevalence and risk factors for HTLV-1 infection among MHD patients in the city of Salvador-Bahia, Brazil.

Methods

We conducted a multi-center, cross-sectional study nested in a prospective cohort of MHD patients enrolled from four outpatient clinics. HTLV-1 screening was performed with ELISA and positive cases were confirmed by Western Blot. Factors associated with HTLV-1 seropositivity were identified by multivariable logistic regression.

Results

605 patients were included in the study. The overall prevalence of HTLV-1 infection was 2.48% (15/605), which was similar to that of hepatitis B [1.98% (12/605)] and C [3.14% (19/605)] viruses in our sample. HTLV-1 seropositivity was positively associated with age [prevalence odds ratio (POR) 1.04; 95% confidence interval (CI) 1.01–1.08], unmarried status (POR 3.65; 95% CI 1.13–11.65), and history of blood transfusion (POR 3.35; 95% CI 1.01–11.13).

Conclusions

The overall prevalence of HTLV-1 infection in a sample of MHD patients was similar to that of other viral infections, such as hepatitis B and C. Our data revealed that MHD patients who are older, unmarried or who have received blood transfusions are at higher risk for HTLV-1 infection.
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Metadata
Title
Prevalence and risk factors for Human T-Lymphotropic Virus Type 1 (HTLV-1) among maintenance hemodialysis patients
Authors
Rilma F. S. Santos
Gildásio C. Conceição
Márcia S. Martins
Angiolina Kraychete
Maria A. C. Penalva
Edgar M. Carvalho
Antonio Alberto Lopes
Paulo Novis Rocha
Publication date
01-12-2017
Publisher
BioMed Central
Published in
BMC Nephrology / Issue 1/2017
Electronic ISSN: 1471-2369
DOI
https://doi.org/10.1186/s12882-017-0484-y

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