[Course of HIV2 seroprevalence at the National Hospital of Niamey (Niger)]. / Evolution de la séroprévalence de l'infection à VIH2 à l'hôpital national de Niamey (Niger).

About the 25,368 serological tests done among the different groups of the population at the biological laboratory of the National Hospital of Niamey from March 1987 to May 1990, the author studied the seroprevalence evolution of the infection HIV2. A regular fall for the HIV2 appeared in this period. The author tries to explain this fall of the HIV2 in a country newly infected by the HIV by the lower infectivity of the HIV2 and/or a failure to adjust of this virus in Niger.

[The seroprevalence of human immunodeficiency virus infection (HIV) in the Touaregs and Peuls Bororo in Niger]. / Séroprévalence de l'infection par le virus de l'immunodéficience humaine (VIH) chez les Touaregs et Peuls Bororo au Niger.

A seroepidemiological study of endemic treponematosis (bejel) in Niger allows us to realise an anonymous non correlated screening of VIH infection in Nomads: Touaregs of Tchirozerine (Agadez), Peuls Boro of Bermo (Maradi). On the 424 Touaregs screened only one was seropositive to VIH2 infection confirmed with Western blot that means 0.23% of seroprevalency comparable to that 0.50% found in the general population. The seroprevalency of trepronematosis (VDRL + TPHA+) is 7% in the range of 5 to 15 years old (80%), period which corresponds to the transmission of Bejel. Moreover this population don't travel to the seaborder countries. Concerning the 213 of the Peuls Bororo screened we had only 3 undetermined reactions to Western blot 1 and 2, despite the high seroprevalence of the treponematosis (VDRL+ TPHA+): 22% mostly in the subjects of more than 15 years old (89.36%) which is the sexual intercourse and exodus period to the seaborder countries, where 66% of our VIH patients are infected.

[The seroprevalence of human immunodeficiency virus infection (HIV) in patients with tuberculosis at the National Hospital of Niamey, Niger (1990-1991)]. / Séroprévalence de l'infection par le virus de l'immunodéficience humaine (VIH) chez les patients atteints de tuberculose à l'hôpital national de Niamey, Niger (1990-1991).

This study has been planned in order to determinate the frequency of the infection by VIH among the 394 new tuberculous, for a period extended from July 1990 to July 1991 at the section of pneumophtisiology in the National Hospital of Niamey. The number of seropositives is 7.6%. The two types of viruses, i.e. VIH1 and VIH2, and the double infection by VIH1 + VIH2 types exist in the tuberculous patients. The VIH1 is most frequently found in the subjects of age group 20-39 years, who are almost emigrants. Inspite of the actual weak sero-prevalency among the tuberculous patients, the authors claim that a sero-epidemiological sequential survey of tuberculosis in Niamey can be a relatively easy method for measuring the variations of sero-prevalency of AIDS in Niger.

[Seroprevalence of human immunodeficiency virus infection (HIV) in the central prison of Niamey (Niger)]. / Séroprévalence de l'infection au virus de l'immunodéficience humaine (VIH) a la prison centrale de Niamey (Niger).

A study on seroprevalency among six hundred and sixty prisoners incarcerated at the central prison of Niamey (Niger) where toxicomania by intravenous injection is inexistant but homosexual probability does exist, the prison being a very closed circle, showed that 0.45% of the prisoners where carrying the anti body anti-HIV. This rate being about the same found in the general population 0.50%.

[Evolution of the seroprevalence of HIV-1 and HIV-2 infections in the national hospital of Niamey, Niger]. / Evolution de la séroprévalence des infections à VIH1 et VIH2 à l'hôpital national de Niamey, Niger.

For 25,368 serologies examined in the biological laboratory of National Hospital of Niamey, Niger, from March 1987 to May 1990, the authors studied seroprevalence HIV1, HIV2 and HIV1 + HIV2 during this periode in the different groups studied: Blood donors, in women patients of child bearing age, pregnant women, prostitutes, prisoners and during systematic visits. It appears there is a tendancy of an increase in HIV1, a decrease in HIV2 and relative stability for the two profiles together.