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The objectives of this study were to compare the seroprevalence and seroincidence rates of human T cell lymphotropic virus type I (HTLV-I) and human immunodeficiency virus 1 (HIV-1) in pregnant women in several ethnic groups in French Guiana between July 1, 1991 and June 30, 2001. This study was conducted in the obstetrics unit of the hospital in Saint Laurent du Maroni in a dynamic cohort of 6,921 pregnant women with 11,679 deliveries, with new entrants each year. The overall seroprevalence of HTLV for all women differed between ethnic groups and was restricted mainly to the descendents of fugitive slaves of African origin known as Noir-Marron (181 of 4,266, 4.24%) and to Haitian women (12 of 287, 4.18%). A decrease in the biennial seroprevalence of HTLV-I was observed over time among deliveries of the Haitian women (P = 0.037), but it remained stable among Noir-Marron (P = 0.22). Fifteen of the 17 HTLV-I seroconversions occurred in the Noir-Marron, giving an incidence of 0.18 per 100 person-years. The overall seroprevalence of HIV-1 was higher in the Haitian women (10 of 293, 3.41%) than in the Noir-Marron (34 of 4,310, 0.79%) and Amerindians (4 of 552, 0.72%). A highly significant increase in the biennial seroprevalence of HIV-1 was observed among the deliveries of the Noir-Marron (P = 0.0003), but it remained stable among Haitian women (P = 0.44). Ten of the 13 HIV-1 seroconversions were observed in Noir-Marron, giving an incidence rate of 0.12 per 100 person-years. These data demonstrate the differential spreading of these two human retroviruses among pregnant women in different ethnic groups living in the same environment. While HTLV-I, which is highly endemic in groups of African origin, showed a slight decrease over time in a suspected cohort effect, HIV-1 spread rapidly in an epidemic mode, especially in the groups of the lowest socioeconomic levels.
Received October 28, 2004. Accepted for publication December 15, 2004.
Acknowledgements: We are indebted to the Service de Protection Maternelle et Infantile de la Direction Départementale des Affaires Sanitaires et SocialesGuyane (Dr. J. Suzanon-Sankale), the Centre de Prévention et de Vaccination of St. Laurent du Maroni (Dr. M. Diop, D. Gaquière, G. Gauthier, Dr. D. Guillot, N. Joly, and Dr. Z. Tlilane), the staff of the Gynecology-Obstetrics department, especially Olivier Pavot and Diane Vernon, and the staff of the Central Laboratory of Biology of André Bouron Hospital for providing technical assistance and help in the collection of information.
* Address correspondence to Patricia Tortevoye, Unité dEpidémiologie et Physiopathologie des Virus Oncogénes, Département dEcosytéme et Epidémiologie des Maladies Infectieuses, Batiment Lwoff, Institut Pasteur, 2528 Rue du Dr. Roux, 75724, Paris, Cedex 15, France. E-mail: ptortevo{at}pasteur.fr
Authors addresses: Patricia Tortevoye and Antoine Gessain, Unité dEpidémiologie et Physiopathologie des Virus Oncogènes, Département dEcosytème et Epidémiologie des Maladies Infectieuses, Batiment Lwoff, Institut Pasteur, 2528 Rue du Dr. Roux, 75724, Paris, Cedex 15, France, Telephone: 33-1-45-68-89-37, Fax: 33-1-40-61-34-65, E-mails: ptortevo{at}pasteur.fr and agessain{at}pasteur.fr. Philippe Tuppin, Etablissement Français des Greffes, Paris, France. Gabriel Carles, Service de Gynécologie-Obstétrique, Centre Hospitalier Frank Joly, 97320, Saint Laurent du Maroni, Guyane Française, France. Christian Peneau, Service de Biologie Médicale, Centre Hospitalier Frank Joly, 97320, Saint Laurent du Maroni Guyane Française, France.
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