[The past revisited: the Institute of Malariology and the Institute of Rural Endemics].

Conference presented by the chemical engineer Dr. Ernest Paulini on his professional history in the field of malariology and public health, focusing especially on the Institute of Malariology; held at the Centro de Pesquitas René Rachou on 6 December 2002, in Belo Horizonte, Minas Gerais.

[Observations upon some factors which influence the laboratory maintenance of Schistosoma mansoni (author's transl)].

Schistosoma mansoni has been maintained in the laboratory using a laboratory strain of B. glabrata, white mice (Mus musculus) and golden hamster (Cricetus auratus). Observations were collected during five consecutive years and the results were analysed for factors which might have influenced them.

[Influence of EDTA on growth and reproduction of Biomphalaria glabrata (author's transl)].

The influence of EDTA on B. glabrata has been investigated. Newly hatched snails were exposed to concentrations of EDTA from 1 to 64 ppm, and young (diameter of 6 mm) snails to concentrations of 50, 80 and 100 ppm, for periods of 90 days.

Laboratory observations on the biological control of Biomphalaria glabrata by a species of Pomacea (Ampullariidae).

Laboratory experiments have shown that medium-sized (30-50 mm in shell height) Pomacea sp. snails consumed the egg masses of Biomphalaria glabrata deposited either on glass or on the leaves of Salvinia, and that they also caused a high mortality rate among the newly hatched B. glabrata.