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Objectives: The migrant community of the Shipibo-Konibo indigenous people in Lima, Peru were extremely vulnerable during the COVID-19 pandemic. Additionally, infection with human T-cell lymphotropic virus type 1 and 2 (HTLV-1/2) is endemic in this population causing immunosuppression. The aim of the study was to describe the association between HTLV-1/2 infection and the clinical severity of COVID-19.
Methods: This was a cross-sectional descriptive study involving a survey of adult Shipibo-Konibo indigenous migrants residing in Cantagallo-Rímac who were identified as suspected or confirmed cases of COVID-19. Blood samples were collected for SARS-CoV-2 antibody and HTLV-1/2 ELISA testing. A confirmatory Western Blot test was performed for those with a positive ELISA test.
Results: A total of 182 individuals were surveyed and sampled. No significant association was found between HTLV-1/2 infection and the clinical severity of COVID-19. The prevalence of HTLV-1/2 was 8.8% (95%CI: 5.0-14.1) with Western Blot. Age was the only statistically significant risk factor for developing a more severe form of COVID-19 (OR: 1.03; 95%CI: 1.00-1.06; p = 0.032).
Conclusions: There was no association found between HTLV-1/2 infection and the clinical severity of COVID-19. The prevalence of HTLV-1/2 infection in the Shipibo-Konibo population is high and warrants continuous monitoring in the advent of other infectious disease outbreaks and the development of HTLV-associated comorbidities.
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http://dx.doi.org/10.1371/journal.pgph.0003442 | DOI Listing |
Prev Med Rep
October 2025
Planning Funding and Outcomes, Te Whatu Ora Health, New Zealand.
Objective: To investigate prevalence of Human T-cell Lymphotropic Virus type 1 or 2 (HTLV-1/2) using the New Zealand Blood Service (NZBS) data, to inform whether further HTLV-1/2 prevalence study may be required, in the context of drivers of the inequities in lung cancer for Māori (the Indigenous population).
Methods: This observational cross-sectional study used the NZBS data of all blood donors nationwide (01/01/2001-30/06/2024). Prevalence overall and by ethnicity was calculated as the number of confirmed HTLV-1/2 positive cases per 10,000 donors.
Glob Health Action
December 2025
Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima, Peru.
In the Peruvian Amazon, a significant proportion of replacement blood donors test reactive for HIV, HTLV-1/2, and other transfusion-transmissible infections but often receive no subsequent care. Optimizing healthcare for these individuals can mitigate adverse outcomes by enabling early diagnosis and management. Effective coordination between Blood Bank and Infectious Diseases services is essential to provide comprehensive care.
View Article and Find Full Text PDFViruses
June 2025
Laboratory of Virology, Institute of Biological Sciences, Federal University of Pará, Belém 66075-110, Pará, Brazil.
Human T-lymphotropic virus 1 (HTLV-1) infection has been associated with inflammatory, autoimmune, and lymphoproliferative diseases with a wide spectrum of clinical manifestations. Among patients with inflammatory rheumatological disease manifestations, cases of rheumatoid arthritis, Sjögren's syndrome, polymyositis, and fibromyalgia, among others, have been reported. Another common feature of rheumatological diseases is the presence of joint manifestations, such as arthralgia and arthritis.
View Article and Find Full Text PDFViruses
May 2025
Laboratory of Virology, Institute of Biological Sciences, Federal University of Pará, Belém 66075-110, Pará, Brazil.
This descriptive, observational, cross-sectional study evaluated HTLV-1 and HTLV-2 infections in Ananindeua, northern Brazil. Individuals were screened for anti-HTLV-1/2 using ELISA (Murex HTLV-I + II, DiaSorin). Reactive or indeterminate samples underwent confirmation via Western blot (HTLV Blot 2.
View Article and Find Full Text PDFTransfusion
August 2025
Infectious Disease Consultant, North Potomac, Maryland, USA.
Background: Over time, changes to the deferral policy for males who had sex with other males (MSM) allowed those reporting past MSM to donate if other eligibility criteria were met. We assessed the return rate after the removal of the MSM deferral and transfusion-transmissible infectious disease (TTID) rates in MSM compared to first-time male donors and donors overall.
Study Design And Methods: Males presenting to donate at the American Red Cross and self-reported MSM between December 13, 2016 and December 31, 2024 were assessed.