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Legrand N, McGregor S, Bull R, Bajis S, Valencia BM, Ronnachit A, Einsiedel L, Gessain A, Kaldor J, Martinello M. Clinical and Public Health Implications of Human T-Lymphotropic Virus Type 1 Infection. Clin Microbiol Rev 2022; 35:e0007821. [PMID: 35195446 PMCID: PMC8941934 DOI: 10.1128/cmr.00078-21] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Human T-lymphotropic virus type 1 (HTLV-1) is estimated to affect 5 to 10 million people globally and can cause severe and potentially fatal disease, including adult T-cell leukemia/lymphoma (ATL) and HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSP). The burden of HTLV-1 infection appears to be geographically concentrated, with high prevalence in discrete regions and populations. While most high-income countries have introduced HTLV-1 screening of blood donations, few other public health measures have been implemented to prevent infection or its consequences. Recent advocacy from concerned researchers, clinicians, and community members has emphasized the potential for improved prevention and management of HTLV-1 infection. Despite all that has been learned in the 4 decades following the discovery of HTLV-1, gaps in knowledge across clinical and public health aspects persist, impeding optimal control and prevention, as well as the development of policies and guidelines. Awareness of HTLV-1 among health care providers, communities, and affected individuals remains limited, even in countries of endemicity. This review provides a comprehensive overview on HTLV-1 epidemiology and on clinical and public health and highlights key areas for further research and collaboration to advance the health of people with and at risk of HTLV-1 infection.
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Affiliation(s)
- Nicolas Legrand
- Kirby Institute, UNSW Sydney, Sydney, New South Wales, Australia
| | - Skye McGregor
- Kirby Institute, UNSW Sydney, Sydney, New South Wales, Australia
| | - Rowena Bull
- Kirby Institute, UNSW Sydney, Sydney, New South Wales, Australia
| | - Sahar Bajis
- Kirby Institute, UNSW Sydney, Sydney, New South Wales, Australia
| | | | - Amrita Ronnachit
- Royal Prince Alfred Hospital, Sydney, New South Wales, Australia
| | - Lloyd Einsiedel
- Central Australian Health Service, Alice Springs, Northern Territory, Australia
| | - Antoine Gessain
- Institut Pasteur, Epidemiology and Physiopathology of Oncogenic Viruses Unit, Paris, France
| | - John Kaldor
- Kirby Institute, UNSW Sydney, Sydney, New South Wales, Australia
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Stufano A, Jahantigh HR, Cagnazzo F, Centrone F, Loconsole D, Chironna M, Lovreglio P. Work-Related Human T-lymphotropic Virus 1 and 2 (HTLV-1/2) Infection: A Systematic Review. Viruses 2021; 13:1753. [PMID: 34578335 PMCID: PMC8472817 DOI: 10.3390/v13091753] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 08/17/2021] [Accepted: 08/27/2021] [Indexed: 12/22/2022] Open
Abstract
Human T-lymphotropic virus 1 and 2 (HTLV-1/2) belong to the delta group of retroviruses which may cause a life-long infection in humans, HTLV-1 leading to adult T-cell leukemia/lymphoma and other diseases. Different transmission modes have been described, such as breastfeeding, and, as for other blood-borne pathogens, unsafe sexual activity, intravenous drug usage, and blood transfusion and transplantation. The present systematic review was conducted to identify all peer-reviewed studies concerning the work-related infection by HTLV-1/2. A literature search was conducted from January to May 2021, according to the PRISMA methodology, selecting 29 studies: seven related to health care workers (HCWs), five to non-HCWs, and 17 to sex workers (SWs). The findings showed no clear evidence as to the possibility of HTLV-1/2 occupational transmission in HCWs, according to the limited number and quality of the papers. Moreover, non-HCWs showed a higher prevalence in jobs consistent with a lower socioeconomic status or that could represent a familial cluster, and an increased risk of zoonotic transmission from STLV-1-infected non-human primates has been observed in African hunters. Finally, a general increase of HTLV-1 infection was observed in SWs, whereas only one paper described an increased prevalence for HTLV-2, supporting the urgent need for prevention and control measures, including screening, diagnosis, and treatment of HTLV-1/2, to be offered routinely as part of a comprehensive approach to decrease the impact of sexually transmitted diseases in SWs.
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Affiliation(s)
- Angela Stufano
- Interdisciplinary Department of Medicine-Section of Occupational Medicine, University of Bari, 70124 Bari, Italy; (H.R.J.); (F.C.); (P.L.)
| | - Hamid Reza Jahantigh
- Interdisciplinary Department of Medicine-Section of Occupational Medicine, University of Bari, 70124 Bari, Italy; (H.R.J.); (F.C.); (P.L.)
| | - Francesco Cagnazzo
- Interdisciplinary Department of Medicine-Section of Occupational Medicine, University of Bari, 70124 Bari, Italy; (H.R.J.); (F.C.); (P.L.)
| | - Francesca Centrone
- Department of Biomedical Sciences and Human Oncology-Hygiene Section, University of Bari, 70124 Bari, Italy; (F.C.); (D.L.); (M.C.)
| | - Daniela Loconsole
- Department of Biomedical Sciences and Human Oncology-Hygiene Section, University of Bari, 70124 Bari, Italy; (F.C.); (D.L.); (M.C.)
| | - Maria Chironna
- Department of Biomedical Sciences and Human Oncology-Hygiene Section, University of Bari, 70124 Bari, Italy; (F.C.); (D.L.); (M.C.)
| | - Piero Lovreglio
- Interdisciplinary Department of Medicine-Section of Occupational Medicine, University of Bari, 70124 Bari, Italy; (H.R.J.); (F.C.); (P.L.)
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Chabay P, Lens D, Hassan R, Rodríguez Pinilla SM, Valvert Gamboa F, Rivera I, Huamán Garaicoa F, Ranuncolo SM, Barrionuevo C, Morales Sánchez A, Scholl V, De Matteo E, Preciado MV, Fuentes-Pananá EM. Lymphotropic Viruses EBV, KSHV and HTLV in Latin America: Epidemiology and Associated Malignancies. A Literature-Based Study by the RIAL-CYTED. Cancers (Basel) 2020; 12:E2166. [PMID: 32759793 PMCID: PMC7464376 DOI: 10.3390/cancers12082166] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 07/11/2020] [Accepted: 07/15/2020] [Indexed: 02/06/2023] Open
Abstract
The Epstein-Barr virus (EBV), Kaposi sarcoma herpesvirus (KSHV) and human T-lymphotropic virus (HTLV-1) are lymphomagenic viruses with region-specific induced morbidity. The RIAL-CYTED aims to increase the knowledge of lymphoma in Latin America (LA), and, as such, we systematically analyzed the literature to better understand our risk for virus-induced lymphoma. We observed that high endemicity regions for certain lymphomas, e.g., Mexico and Peru, have a high incidence of EBV-positive lymphomas of T/NK cell origin. Peru also carries the highest frequency of EBV-positive classical Hodgkin lymphoma (HL) and EBV-positive diffuse large B cell lymphoma, not otherwise specified (NOS), than any other LA country. Adult T cell lymphoma is endemic to the North of Brazil and Chile. While only few cases of KSHV-positive lymphomas were found, in spite of the close correlation of Kaposi sarcoma and the prevalence of pathogenic types of KSHV. Both EBV-associated HL and Burkitt lymphoma mainly affect young children, unlike in developed countries, in which adolescents and young adults are the most affected, correlating with an early EBV seroconversion for LA population despite of lack of infectious mononucleosis symptoms. High endemicity of KSHV and HTLV infection was observed among Amerindian populations, with differences between Amazonian and Andean populations.
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Affiliation(s)
- Paola Chabay
- Multidisciplinary Institute for Investigation in Pediatric Pathologies (IMIPP), CONICET-GCBA, Molecular Biology Laboratory, Pathology Division, Ricardo Gutiérrez Children’s Hospital, C1425EFD Buenos Aires, Argentina; (P.C.); (E.D.M.); (M.V.P.)
| | - Daniela Lens
- Flow Cytometry and Molecular Biology Laboratory, Departamento Básico de Medicina, Hospital de Clínicas/Facultad de Medicina, Universidad de la República, CP 11600 Montevideo, Uruguay;
| | - Rocio Hassan
- Oncovirology Laboratory, Bone Marrow Transplantation Center, National Cancer Institute “José Alencar Gomes da Silva” (INCA), Ministry of Health, 20230-130 Rio de Janeiro, Brazil;
| | | | - Fabiola Valvert Gamboa
- Department of Medical Oncology, Cancer Institute and National League against Cancer, 01011 Guatemala City, Guatemala;
| | - Iris Rivera
- Department of Hematology, Salvadoran Institute of Social Security, Medical Surgical and Oncological Hospital (ISSS), 1101 San Salvador, El Salvador;
| | - Fuad Huamán Garaicoa
- Department of Pathology, National Cancer Institute—Society to Fight Cancer (ION-SOLCA), Santiago de Guayaquil Catholic University, Guayaquil 090615, Ecuador;
| | - Stella Maris Ranuncolo
- Cell Biology Department, Institute of Oncology “Angel H. Roffo” School of Medicine, University of Buenos Aires, C1417DTB Buenos Aires, Argentina;
| | - Carlos Barrionuevo
- Department of Pathology, National Institute of Neoplastic Diseases, National University of San Marcos, 15038 Lima, Peru;
| | - Abigail Morales Sánchez
- Research Unit in Virology and Cancer, Children’s Hospital of Mexico Federico Gómez, 06720 Mexico City, Mexico;
| | - Vanesa Scholl
- Department of Integrated Genomic Medicine, Conciencia-Oncohematologic Institute of Patagonia, 8300 Neuquén, Argentina;
| | - Elena De Matteo
- Multidisciplinary Institute for Investigation in Pediatric Pathologies (IMIPP), CONICET-GCBA, Molecular Biology Laboratory, Pathology Division, Ricardo Gutiérrez Children’s Hospital, C1425EFD Buenos Aires, Argentina; (P.C.); (E.D.M.); (M.V.P.)
| | - Ma. Victoria Preciado
- Multidisciplinary Institute for Investigation in Pediatric Pathologies (IMIPP), CONICET-GCBA, Molecular Biology Laboratory, Pathology Division, Ricardo Gutiérrez Children’s Hospital, C1425EFD Buenos Aires, Argentina; (P.C.); (E.D.M.); (M.V.P.)
| | - Ezequiel M. Fuentes-Pananá
- Research Unit in Virology and Cancer, Children’s Hospital of Mexico Federico Gómez, 06720 Mexico City, Mexico;
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Eusebio-Ponce E, Candel FJ, Anguita E. Human T-Cell Lymphotropic Virus Type 1 and associated diseases in Latin America. Trop Med Int Health 2019; 24:934-953. [PMID: 31183938 DOI: 10.1111/tmi.13278] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
This narrative review, which is based on a systematic literature search following the PRISMA guidelines, provides a general overview of Human T-cell Lymphotropic Virus type 1 (HTLV-1) and associated diseases: Adult T-cell Leukaemia-Lymphoma (ATLL) and HTLV-1-Associated Myelopathy/Tropical Spastic Paraparesis (HAM/TSP) in Latin America, focusing on epidemiology and prevention. Using the published information on HTLV-1, ATLL and HAM/TSP prevalence, we present comprehensive and accurate maps and tables, and developed an algorithm to assist in the prevention of HTLV-1 transmission through breastfeeding while considering socio-economic status. Latin America is an interesting scenario to study HTLV-1 because of the diverse origin of its population. Apart from the expected high prevalence in inhabitants of African ancestry, the presence of endemic foci affecting indigenous populations is particularly striking. ATLL prevention is the biggest challenge in this field. Most ATLL cases are transmitted through breastfeeding; thus, prevention methods to avoid ATLL in endemic countries have to be focused on this. In view of the high inequality in most Latin American countries, reduction in breastfeeding duration, freezing/thawing and pasteurisation of breastmilk can be suitable interventions in poor settings, considering that avoiding the risk of malnutrition and infant mortality must be the priority.
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Affiliation(s)
- Emiliana Eusebio-Ponce
- Research Department, Universidad Iberoamericana, Santo Domingo, Dominican Republic.,Department of Medicine, Faculty of Medicine, Universidad Complutense de Madrid (UCM), Madrid, Spain
| | - Francisco Javier Candel
- Department of Medicine, Faculty of Medicine, Universidad Complutense de Madrid (UCM), Madrid, Spain.,Clinical Microbiology and Infectious Diseases Department, Transplant Coordination Unit, IdISSC and IML Institutes, Hospital Clínico San Carlos, Study Group of Infections in Emergency Departments (Infurgsemes, SEMES), Madrid, Spain
| | - Eduardo Anguita
- Department of Medicine, Faculty of Medicine, Universidad Complutense de Madrid (UCM), Madrid, Spain.,Hematology Department, Instituto de Medicina de Laboratorio (IML), Instituto de Investigación Sanitaria San Carlos (IdISSC), Hospital Clínico San Carlos, Madrid, Spain
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Olah I, Fukumori LMI, Montanheiro P, Vergara MP, Smid J, Duarte AJS, Penalva de Oliveira AC, Casseb J. Patterns of In vitro Lymphoproliferative Responses Among HTLV-1-infected Subjects: Upregulation by HTLV-1 During HIV-1 Co-infection. Scand J Immunol 2007; 65:577-80. [PMID: 17523951 DOI: 10.1111/j.1365-3083.2007.01941.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The present study evaluated the in vitro response to different mitogens and a candidin antigen (CMA) in Human T-cell lymphotropic virus type 1 (HTLV-1) and co-infected HIV-1/HTLV-1 patients, to identify if this co-infection may modify the spontaneous lymph proliferative response. Peripheral blood mononuclear cells from 72 healthy seronegative controls, 75 asymptomatic HTLV-1-infected carriers, 42 HAM/TSP cases, 33 solely HIV-1-infected subjects and 24 HIV-1/HTLV-1 patients were assayed in the presence and absence of mitogens (PHA, PWM and OKT3) and CMA. The HAM/TSP group had the highest proliferation rate at 3 and 6 days after culture. HAM/TSP cases showed decreased response to PHA, compared with asymptomatic HTLV-1 subjects, and most important, the co-infected HIV-1/HTLV-1 cases presented a similar response to HTLV-1-infected subjects after 3 days of culture. The singles HIV-1-infected group had decreased in vitro response. It appears that during co-infection, the HTLV-1 regulatory proteins overwhelm the action of HIV-1 regulatory proteins.
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Affiliation(s)
- I Olah
- Laboratory of Allergy and Clinical Immunology - FMUSP, Institute of Infectious Diseases Emilio Ribas, São Paulo, Brazil
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Barcellos NT, Fuchs SC, Mondini LG, Murphy EL. Human T lymphotropic virus type I/II infection: prevalence and risk factors in individuals testing for HIV in counseling centers from Southern Brazil. Sex Transm Dis 2006; 33:302-6. [PMID: 16505751 DOI: 10.1097/01.olq.0000194598.47821.b6] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE The objective of this study was to ascertain the prevalence and to investigate risk factors for human T lymphotropic virus type I/II (HTLV I/II) infection among subjects who tested for HIV at three counseling centers in Porto Alegre, Brazil. METHODS The authors conducted a cross-sectional study in which subjects screened for HIV were tested for HTLV. Socioeconomic and demographic data, social and sexual behavior, history of having been breastfed, and past blood transfusion or drug use were gathered with a standardized questionnaire. RESULTS Among 2985 participants, 2.4% had HTLV infection confirmed (1.4% HTLV I). The risk increased with age, but there was no difference among genders. The multivariate model shows that injecting cocaine users were 5.2 (95% confidence interval, 2.5-10.7) times more likely to be HTLV I/II-positive than non-injecting cocaine users and HIV infection persisted as an independent risk factor. CONCLUSION Among persons presenting at HIV testing centers in Porto Alegre, Brazil, HTLV I was three times more common than HTLV II; injection drug use was the predominant mode of transmission.
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Novoa P, Penalva de Oliveira AC, Posada Vergara MP, da Silva Duarte AJ, Casseb J. Molecular characterization of human T-cell lymphotropic virus type 2 (HTLV-II) from people living in urban areas of Sao Paulo city: Evidence of multiple subtypes circulation. J Med Virol 2006; 79:182-7. [PMID: 17177305 DOI: 10.1002/jmv.20775] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
BACKGROUND In Brazil, human T-cell lymphotropic virus type I and type II (HTLV-I and HTLV-II) are co-circulating and possess approximately 65% homology, which results in high cross-reactivity in serological tests. Based on the detection of EIA and Western blot (WB) tests, HTLV serodiagnosis yields indeterminate results in high-risk population, with the true determination of HTLV-II prevalence requiring a combined serological and molecular analysis. Molecular analysis of HTLV-II isolates has shown the existence of four distinct subtypes: IIa, IIb, IIc, and IId. The aim of this study was to evaluate the routine EIA and WB used in Sao Paulo city, as well as molecular methods for confirmation of infection and HTLV-II subtype distribution. RESULTS Two hundred ninety-three individuals, who were enrolled in the HTLV out-clinic in Sao Paulo city, Brazil, between July 1997 and May 2003, were tested by EIAs, and positive sera 232 (79%) reactive by one of the tests. When these sera were tested by WB revealed 134 were HTLV-I, 28 HTLV-II, 4 HTLV-I/II, and 48 were indeterminate. Polymerase chain reaction (PCR) on the indeterminate group showed that 20 (42%) were HTLV-II and 28 were negative. From a total of 48 HTLV-II subjects with DNA available, restriction fragment length polymorphism (RFLP) of the env region revealed 47 HTLV-IIa and 1 HTLV-IIb. The phylogenetic analysis was performed on 23 samples, which identified 19 as subtype a, Brazilian subcluster, and 4 as subtype b. This is the first time HTLV-II subtype b has been described in Brazil. However, further studies, such as a complete nucleotide DNA sequencing, need to be done to confirm these findings.
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Affiliation(s)
- Patricia Novoa
- Institute of Infectious Diseases Emilio Ribas, Sao Paulo, Brazil
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Abstract
Child prostitution is a significant global problem that has yet to receive appropriate medical and public health attention. Worldwide, an estimated 1 million children are forced into prostitution every year and the total number of prostituted children could be as high as 10 million. Inadequate data exist on the health problems faced by prostituted children, who are at high risk of infectious disease, pregnancy, mental illness, substance abuse, and violence. Child prostitution, like other forms of child sexual abuse, is not only a cause of death and high morbidity in millions of children, but also a gross violation of their rights and dignity. In this article we estimate morbidity and mortality among prostituted children, and propose research strategies and interventions to mitigate such health consequences. Our estimates underscore the need for health professionals to collaborate with individuals and organisations that provide direct services to prostituted children. Health professionals can help efforts to prevent child prostitution through identifying contributing factors, recording the magnitude and health effects of the problem, and assisting children who have escaped prostitution. They can also help governments, UN agencies, and non-governmental organisations (NGOs) to implement policies, laws, and programmes to prevent child prostitution and mitigate its effects on children's health.
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Affiliation(s)
- Brian M Willis
- Centers for Disease Control and Prevention, Atlanta, GA 97201, USA.
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Segurado AAC, Biasutti C, Zeigler R, Rodrigues C, Damas CD, Jorge MLSG, Marchiori PE. Identification of human T-lymphotropic virus type I (HTLV-I) subtypes using restricted fragment length polymorphism in a cohort of asymptomatic carriers and patients with HTLV-I-associated myelopathy/tropical spastic paraparesis from São Paulo, Brazil. Mem Inst Oswaldo Cruz 2002; 97:329-33. [PMID: 12048560 DOI: 10.1590/s0074-02762002000300009] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Although human T-lymphotropic virus type I (HTLV-I) exhibits high genetic stability, as compared to other RNA viruses and particularly to human immunodeficiency virus (HIV), genotypic subtypes of this human retrovirus have been characterized in isolates from diverse geographical areas. These are currently believed not to be associated with different pathogenetic outcomes of infection. The present study aimed at characterizing genotypic subtypes of viral isolates from 70 HTLV-I-infected individuals from São Paulo, Brazil, including 42 asymptomatic carriers and 28 patients with HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSP), using restricted fragment length polymorphism (RFLP) analysis of long terminal repeat (LTR) HTLV-I proviral DNA sequences. Peripheral blood mononuclear cell lysates were amplified by nested polymerase chain reaction (PCR) and amplicons submitted to enzymatic digestion using a panel of endonucleases. Among HTLV-I asymptomatic carriers, viral cosmopolitan subtypes A, B, C and E were identified in 73.8%, 7.1%, 7.1% and 12% of tested samples, respectively, whereas among HAM/TSP patients, cosmopolitan A (89.3%), cosmopolitan C (7.1%) and cosmopolitan E (3.6%) subtypes were detected. HTLV-I subtypes were not statistically significant associated with patients' clinical status. We also conclude that RFLP analysis is a suitable tool for descriptive studies on the molecular epidemiology of HTLV-I infections in our environment.
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Affiliation(s)
- Aluisio A C Segurado
- Laboratório de Virologia (LIM-52), Departamento de Doenças Infecciosas e Parasitárias, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, 05403-000, Brasil.
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Dourado I, Andrade T, Carpenter CL, Galvão-Castro B. Risk factors for human T cell lymphotropic virus type I among injecting drug users in northeast Brazil: possibly greater efficiency of male to female transmission. Mem Inst Oswaldo Cruz 1999; 94:13-8. [PMID: 10029907 DOI: 10.1590/s0074-02761999000100006] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
It was observed in the city of Salvador, State of Bahia, the highest seroprevalence of human T cell lymphotropic virus type 1 (HTLV-I) infection in Brazil as demonstrated by national wide blood bank surveys. In this paper, we report results of an investigation of drug use and sexual behavior associated with HTLV-I infection among male and female injecting drug users (IDUs) in Salvador. A cross sectional study was conducted in the Historical District of Salvador from 1994-1996 (Projeto Brasil-Salvador) and 216 asymptomatic IDUs were selected using the snowball contact technique. Blood samples were collected for serological assays. Sera were screened for human immunodeficiency virus (HIV-1/2) and HTLV-I/II antibodies by ELISA and confirmed by Western blot. The overall prevalence of HTLV-I/II was 35.2% (76/216). The seroprevalence of HTLV-I, HTLV-II and HIV-I was for males 22%, 11.3% and 44.1% and for females 46.2%, 10.3% and 74.4% respectively. HTLV-I was identified in 72.4% of HTLV positive IDUs. Variables which were significantly associated with HTLV-I infection among males included needle sharing practices, duration of injecting drug use, HIV-I seropositivity and syphilis. Among women, duration of injecting drug use and syphilis were strongly associated with HTLV-I infection. Multivariate analysis did not change the direction of these associations. Sexual intercourse might play a more important role in HTLV-I infection among women than in men.
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Affiliation(s)
- I Dourado
- Instituto de Saúde Coletiva Universidade Federal da Bahia, Salvador, Brasil.
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11
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Dourado I, Andrade T, Galvão-Castro B. HTLV-I in Northeast Brazil: differences for male and female injecting drug users. JOURNAL OF ACQUIRED IMMUNE DEFICIENCY SYNDROMES AND HUMAN RETROVIROLOGY : OFFICIAL PUBLICATION OF THE INTERNATIONAL RETROVIROLOGY ASSOCIATION 1998; 19:426-9. [PMID: 9833754 DOI: 10.1097/00042560-199812010-00016] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND To investigate the seroprevalence of HTLV-I infection among male and female injecting drug users (IDUs). METHODS A cross-sectional study conducted in Salvador, Brazil, from 1994 to 1996 (Projeto Brasil-Salvador). The study population of 216 asymptomatic IDUs was selected using snowball contact technique. Data on demographics, sexual behavior, and drug use practices were obtained and blood samples collected for serologic assays. Sera were screened for HIV-1/2 and HTLV-I and HTLV-II antibodies by enzyme-linked immunosorbent assay (ELISA) and confirmed by Western blot. RESULTS The overall prevalence of HTLV-I/II was 35.2% (76 of 216). The seroprevalence of HTLV-I, HTLV-II, and HIV-1 was for males 22.0%, 11.3%, and 44.1%, and for females 46.2%, 10.3%, and 74.4%, respectively. Specific seroprevalence of HTLV-I infection demonstrated linear trend with increasing age and increasing duration of drug use. Using univariate analysis, the variables that were significantly associated with HTLV-I infection among males included needle sharing practices, duration of IDU, HIV-1 seropositivity, and positive test result for syphilis. Among women, duration of injecting drug use and positive test result for syphilis were strongly associated with HTLV-I infection. CONCLUSIONS Retrovirus infection is highly prevalent among IDUs in Salvador, Brazil and HTLV-I is more common that HTLV-II. Duration of drug use is an important correlate of HTLV-I infection.
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Affiliation(s)
- I Dourado
- Instituto de Saúde Coletiva, Salvador, Bahia, Brazil.
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Andrade TM, Dourado I, Galvão-Castro B. Associations among HTLV-I, HTLV-II, and HIV in injecting drug users in Salvador, Brazil. JOURNAL OF ACQUIRED IMMUNE DEFICIENCY SYNDROMES AND HUMAN RETROVIROLOGY : OFFICIAL PUBLICATION OF THE INTERNATIONAL RETROVIROLOGY ASSOCIATION 1998; 18:186-7. [PMID: 9637584 DOI: 10.1097/00042560-199806010-00011] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Casseb J, Souza T, Pierre-Lima MT, Yeh E, Hendry RM, Gallo D. Testing problems in diagnosing HTLV infection among intravenous drug users with AIDS in São Paulo City, Brazil. AIDS Res Hum Retroviruses 1997; 13:1639-41. [PMID: 9430256 DOI: 10.1089/aid.1997.13.1639] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Affiliation(s)
- J Casseb
- Institute of Infectious Disease Emilio Ribas, São Paulo, Brazil.
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