Determinants and trends in perinatal human immunodeficiency virus type 1 (HIV-1) transmission in the metropolitan area of Belo Horizonte, Brazil: 1998-2005

Grupo de Aids Materno-Infantil, Departamento de Parasitologia, Instituto de Ciências Biológicas Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil.
Memórias do Instituto Oswaldo Cruz (Impact Factor: 1.59). 06/2008; 103(4):351-7. DOI: 10.1590/S0074-02762008000400007
Source: PubMed


Significant decrease in human immunodeficiency virus type 1 (HIV-1) vertical transmission has been observed worldwide in centers where interventions such as antiretroviral therapy (ART), elective cesarean section, and avoidance of breastfeeding have been implemented. This prospective cohort study aimed to assess the determinants of and the temporal trends in HIV-1 vertical transmission in the metropolitan area of Belo Horizonte, Brazil from January 1998 to December 2005. The rate of HIV-1 vertical transmission decreased from 20% in 1998 to 3% in 2005. This decline was associated with increased use of more complex ART regimens during pregnancy. Multivariate analysis restricted to clinical variables demonstrated that non ART, neonatal respiratory distress/sepsis and breastfeeding were independently associated with HIV-1 vertical transmission. When laboratory parameters were included in the model, high maternal viral load and non maternal ART were associated with HIV-1 vertical transmission. The results from this study confirm the impact of ART in the reduction of HIV-1 vertical transmission and indicate the need for improvement in the care and monitoring of mother and infant pairs affected by HIV-1.

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Available from: Jorge Andrade Pinto, Sep 30, 2015
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    • "Children who were breastfed in this cohort had a 2.6-fold greater risk of HIV infection, even when the effect of breastfeeding was adjusted for other variables. Other authors have also found this association in Brazilian studies (Succi 2007; Kakehasi et al. 2008; Matida et al. 2011). Coutsoudis et al. (2004) in a meta-analysis of nine studies of populations where breastfeeding is "
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    Tropical Medicine & International Health 12/2012; 18(3). DOI:10.1111/tmi.12042 · 2.33 Impact Factor
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    ABSTRACT: A significant number of Brazilian gestational-age women are still not tested for HIV, representing a high risk of transmission to their newborns. The current study sought to identify the number of pregnant women with no previous testing or undocumented for HIV referred to the Gynecology and Obstetrics Department of a Regional Teaching Hospital and included diagnosis of HIV infection determined by a rapid test and perinatal transmission in pregnancy. Medical records of all pregnant women admitted to hospital from January 2001 to December 2005 were reviewed. Pregnant women without HIV results were submitted to a rapid HIV test. Those who tested positive were further tested by ELISA and confirmed by indirect immunofluorescence assay (IIA) or Western blot (WB). The viral load from babies born to HIV-infected mothers was assessed by bDNA. Of the 16,424 pregnant women analyzed (6.6%), 1,089 were undocumented for HIV. Eleven women were positive in rapid testing and 10 were confirmed by ELISA, IIA or WB, with 0.9% seropositivity. Mother/infant pairs received zidovudine monotherapy prophylaxis and infant viral load was lower than 50 copies/mL. A higher number of pregnant women previously tested for HIV during antenatal care was verified, compared to that obtained nationwide.
    Revista do Instituto de Medicina Tropical de São Paulo 10/2009; 51(5):273-6. DOI:10.1590/S0036-46652009000500007 · 1.01 Impact Factor
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