BMJ 1994;308:441-43 (12 February)

Papers

Retrospective study of maternal HIV-1 and HIV-2 infections and child survival in Abidjan, Cote d'Ivoire

K M De Cock, F Zadi, G Adjorolo, M O Diallo, M Sassan-Morokro, E Ekpini, T Sibailly, R Doorly, V Batter, K Brattegaard, H Gayle 

Division of HIV/AIDS, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, GA, USA Correspondence to: Dr K M De Cock.

Abstract

Objectives : To compare the effects of maternal HIV-1 and HIV-2 infections on outcome of pregnancy, infant mortality, and child survival, and to measure serological concordance between mothers and children.
Design : Retrospective cohort study with cross sectional study of concordance for HIV antibodies. Setting - Hospital, tuberculosis clinic, and maternal and child health centre in Abidjan, Cote d'Ivoire, west Africa.
Subjects : 986 women who had had a total of 2758 pregnancies since 1980. The last born children of 194 of these women.
Main outcome measures : Pregnancy outcomes; mortality for all children born since 1980; and outcome for last born children. Serological concordance between mothers and last born children.
Results : Women with HIV-1 and HIV-2 infections had higher rates of spontaneous abortion and stillbirth than uninfected women (86/769 in HIV-1 positive women, 48/421 in HIV-2 positive, 31/234 in dually reactive, and 96/1131 in uninfected). Compared with children born to uninfected mothers (mortality 10.3%), greater proportions of children of HIV-1 positive (20.6%) and dually reactive (20.3%) mothers had died; mortality in children of HIV-2 infected women (13.1%) was not significantly increased. Infant mortalities for the last born children of HIV-1 positive, dually reactive, HIV-2 positive, and seronegative women were, respectively, 133, 82, 32, and 40 per 1000 live births. Nine of 77 last born children of HIV-1 positive mothers were concordantly seropositive compared with none of 21 children of HIV-2 infected mothers.
Conclusions : Maternal HIV-2 infection has less influence on child survival than infection with HIV-1, probably because of a lower vertical transmission rate.

Public health implications

  • Public health implications

  • The rate of mother to child transmission of HIV-2 is believed to be considerably lower than that of HIV-1

  • In this study survival of children born to HIV-1 and dually reactive women was greatly reduced compared with that for children of seronegative and HIV-2 positive women

  • Nine of 77 children of HIV-1 positive mothers but none of the 21 children of HIV-2 positive mothers were concordantly seropositive

  • Perinatal transmission of HIV-2 is much less efficient than that of HIV-1, resulting in more favourable child survival


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