[Acute open-angle glaucoma in a woman with AS hemoglobinopathy]. / Glaucome aigu à angle ouvert chez une femme porteuse d'une hémoglobinopathie AS.

A 64-year-old black woman presented unilateral acute ocular hypertension. Gonioscopy showed a blood clot obstructing Schlemm's canal. Intraocular pressure returned to normal values after resorption of the blood clot. Hemoglobin electrophoresis found a sickle-cell trait, raising the hypothesis that the obstruction of outflow was probably due to the mechanism of sickling.

[Evaluation of the efficacy of Bacillus sphaericus Neid 1904 applied to previously cleaned gutters for Culex quinquefasciatus Say 1823 control in Abidjan (Côte d'Ivoire)]. / Evaluation de l'efficacité de Bacillus sphaericus neid 1904 appliqué dans des caniveaux préalablement nettoyés, pour lutter contre Culex quinquefasciatus Say 1823 à Abidjan (Côte d'Ivoire).

In the framework of a pluri-institutional research project, led in Abidjan and aimed at defining measures to fight against mosquitoes in Abidjan area, a test to struggle for C. quinquefasciatus larvae was carried out in 1990. This test was conducted in Koumassi, which is one of Abidjan district, in which environmental conditions are very favourable for developing C. quinquefasciatus non-adult stages. The test consisted essentially in spreading a Bacillus sphaericus waterish solution (dose: 10 g.m-2) in previously cleaned gutters. The efficiency of the fight test was essentially assessed through: -the size of C. quinquefasciatus non-adult stages populations according to their development stage (egg, larva, nymph); -variations of both, C. quinquefasciatus females aggressive density and their physiological age. The gutters cleaning did not reduce significantly C. quinquefasciatus non-adult stages populations. On the other hand, the effectiveness of B. sphaericus was convincing. Its effects were tested to last for four weeks. The results were confirmed by the observations made on C. quinquefasciatus adult populations.

[Seasonal variations of female aggressiveness and population dynamics of Culex quinquefasciatus Say 1823 in Abidjan (Republic of Côte d'Ivoire)]. / Variations saisonniéres de l'agressivité des femelles et dynamique des populations de Culex quinquefasciatus Say 1823 à Abidjan (République de Côte d'Ivoire).

Seasonal variations of Culex quinquefasciatus aggressiveness were studied in Abidjan where this mosquito is very harmful. Abidjan is crossed from East to West by the Ebrié lagoon, which is a vast expanse of brackish water (about 566 km2). In the North of this expanse of water lay continental plateaux and in the South lay low-plateaux. The city is composed of 10 districts, most of which are situated on the continental plateaux. Culex quinquefasciatus adult populations were caught monthly in 1989 on human bait traps in Abidjan 10 districts, one study place was located in each district. Captures took place outside the houses, in the dusk and during the first part of night, that is to say between 4 p.m. and 1 a.m. In Abidjan, Culex quinquefasciatus population density varies considerably within the city area. In the areas where the species is numerous, a high percentage of it seems to be developing all year through from breeding places which are, in most cases, permanent. Besides, the aggressiveness seasonal cycle which was registered in the above mentioned areas is particularly diversified.