Le secret et l’enfant victime de maltraitance sexuelle

Cet article met en évidence la mutiplicité des raisons qui poussent un enfant à garder le silence sur sa victimisation sexuelle. Trois catégories de facteurs ont été identifiées. La première se rapporte au stade de développement de l'enfant. La seconde concerne l'agresseur sexuel et les épisodes de maltraitance sexuelle. La troisième relève des caractéristiques du milieu de soutien de l'enfant et de la façon dont elles sont perçues par ce dernier

DNA sequence homology in Rhizobium meliloti plasmids

International audiencePlasmids were recovered by an alkaline procedure from six symbiotically effective strains of Rhizobium meliloti of diverse geographical origin, reported to harbour only one middle-size large plasmid (ranging from 89 to 143 Megadaltons). Each purified plasmid was digested with eight restriction endonucleases; cleavage patterns were very complex: only KpnI and XbaI gave a limited number of bands. Fingerprints were very different, whatever the restriction enzyme or the geographical origin of the strains. However, Southern DNA-DNA hybridizations revealed that the plasmids showed homologous sequences having a high thermal stability. We gave evidence that some of these sequences are common to all the plasmids of R. meliloti. The biological function of these common sequences is unknown. Hybridization with cloned nitrogen fixation (nif) genes from Klebsiella pneumoniae had demonstrated that nif genes were not located on the middle — size plasmids of R. meliloti studied in this paper