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J Maurand

Publications and source records attributed to J Maurand.

12 recordsLinked to original sources
PubMed1988

[Preliminary observations of two microsporidian hyperparasites of Acanthocephala in marine and lagoon fishes].

Microsporidium acanthocephali n. sp. and Microsporidium propinqui n. sp. are two microsporidian species hyperparasitic in the tegumentary syncytium of salt-water fishes. Their ultrastructural study shows that both species have diplocaryotic meronts and spores, anisofilar polar filaments; meronts and some sporogonic stages of M. acanthocephali are surrounded by a parasitic vacuole. Spores of both parasites are oviform; those of M. acanthocephali are gigantic, 12-14 micron long and 6-7 micron broad, those of M. propinqui are only 3-4 micron X 1.25-1.50 micron. A poor knowledge of some sporogonic aspects prevents us from all precise generic assigning of these two parasites which may coexist in the same Helminth.

Acanthocephala↗
PubMed1978

[Simuliids larvae microsporidans: ultrastructural data (author's transl)].

This work is the summary of our present knowledge about the ultrastructure of Simuliids larvae Microsporidans, including several new data concerning: 1. Pleistophora simulii (Lutz et Splendore, 1904): reticulated or net-like plasmodial envelope, formation of pansporoblastic structures looking like short pipes. 2. Stempellia simulii Maurand et Manier, 1968: plasmodial envelope as Pleistophora simulii, granular-textured polaroplast. 3. Thelohania fibrata (Strickland, 1913): ultrastructural study of the sporogonic sequence nerve done so far. 4. Thelohania bracteata (Stickland, 1913): its relations with Thelohania minuta, T. canningi, Amblyospora bracteata, Pegmatheca simulii. 5. Tuzetia debaisieuxi (Jirovec, 1943): formation of pseudopansporoblasts by the host-cell membrane.

Animals↗
PubMed1976

[New species of Microsporidia, parasite of Myriapoda-Diplopoda of South Dahomey].

A new microsporidian parasitic in Myriapoda-Diplopoda of Sud-Dahomey (Habrodesmus falx Cook & Oxydesmus granulosus Palisot de Beauvois) is described by photonic microscopy. It can be recognized by its thick-enveloped pansporoblasts yielding from 30 to 66 elongate and ovoid spores measuring 4,8 mum in length and 2,2 mum in diameter. The spore is uninucleate. This microsporidian forms cysts in the anterior part of the host affecting the musculature of the digestive tract, the adipose tissue and segmentary muscles. However, it appears necessary to study this parasite again by means of electron microscopy for a better understanding of its life-cycle and in order to place it in the Microsporidian taxonomy.

Animals↗
PubMedDate not supplied

[Microsporidia of the Simulium larvae: systematic, cytochemical, pathological and ecological data].

At present, 10 microsporidian species belonging to the genera Nosema, PLeistophora, Thelohania, Stempellia, Octosporea, Weiseria and Caudospora are known as parasites in Simuliids larvae. Acid mucosubstances fixing alcian blue and proteinic granules rich in -SH groups appear during sporogony in various species of Thelohania, Pleistophora, Stempellia. The microsporidan contracts intimate relations with larval host-cells of the type host-parasite complex and lengthens larval state as well for the size (a morphological aspect) as for the respiratory rate (a physiological aspect). This is a very good condition for the development of the parasite. The incidence of parasitism does not exceed 8%. It looks independant from various physical and chemical factros (stream velocity, temperature, oxygen concentration) but it rises with the perimaginal population-age because of the lengthening of larval life by the parasite.

Adipose Tissue↗