[Tests for evaluating the effectiveness of pediculicides: importance and limitations].

The obligation to prove pediculicides efficacy is relatively recent. Two tests are required by the authorities to obtain registration. In vitro test (with Pediculus humanus humanus) is the first step to evaluate the efficacy of new molecules.

[Scalp pediculosis and its treatment: bioclinical trials of different pediculicides and repellents in Antananarivo].

After a recall of different existing kinds of louse, pediculicides and their mode of action, the authors report the bio-clinical trials they carried out in Antananarivo using different associations and galenic forms of medicines. The objectives of these studies on the treatment of scalp pediculosis is either the development of efficient insecticides or the application for the official permit of sale.

[Current epidemiology of pediculosis capitis].

In schools of Touraine-France--usually more than 15% of the children are infected with capitis (investigation performed in 1987 and 1988). This number (rate) is rather close to the one that obtained in previous two investigations (1974 and 1981). Hence Pediculosis is not progressing.

[Anti-nuclear factor and anti-toxoplasma antibodies detected using the Toxo-M Abbott kit].

The antibody capture IgM Toxo Abbott is a specific method. But serum specimens had false positive results. These serum specimens have been studied.

[Treatment of bilharziasis due to Schistosoma mekongi with praziquantel].

After a review of the mechanisms of anti-schistosomal activity of praziquantel and the treatment of Schistosoma mekongi with this drug, the authors report two cases of Schistosoma mekongi treated with praziquantel with failure. Rectal mucosa biopsies are performed and eggs are present. Light microscopic, electron microscopic and on ultra-thin sections examination of these samples don't reveal morphological alterations of Schistosoma mekongi eggs after treatment.