Barebacking and sexual health in the French setting: "NoKondom Zone" workshops.

Barebacking has been, since its emergence in the 1990s, a very controversial issue, and has as many definitions as authors writing about it. In France, sexual risk reduction strategies have been very contentious, and the advent of the bareback phenomenon increased this conflictual situation. This state of affairs has prevented the identification of needs and development of adequate programs for people not using condoms. In December 2008, a peer sexual health workshop, organized on a monthly basis and taking place over 1 year was launched and facilitated by a group of people who declared not using condoms (n approximate = 15). These workshops were hosted and organized by AIDES, the largest French HIV/AIDS community-based organization. The main objective was to create a safe place for exchanging about sexuality and health concerns. Most of the participants, who were mainly HIV positive, referred to being discriminated against in healthcare settings and in the gay community because of prevention policies and stereotypes about barebacking. This experience was extremely challenging for group members, for the facilitator and for the organisation. Main results show that taking part in the groups allowed participants to break their feelings of isolation, to discuss risk reduction strategies and, in some cases, to improve communication with medical staff. Besides, a political dimension related to implementing this kind of intervention was discussed. Participants declared that, in one way or another, they were more in need of this support than people not taking risks. Further interventions are needed in order to compare and contrast the present results.

[Ultrastructure of the gastrointestinal epithelium in the marmoset (Callithrix jacchus)]. / Ultrastruktur des Magen-Darm-Epithels beim Marmoset (Callitriv jacchus).

The epithelium of the stomach and intestine of one and three days old as well as adult marmosets was investigated using transmission electron microscopy and was compared with already existing data of man and the laboratory rodents, rat, mouse and guinea-pig. On postnatal day (PD) 1, the enterocytes possessed an inframicrovillous membrane system and giant lysosomes which were absent in adult marmosets whereas the surface and glandular epithelial cells of the stomach showed all structures which were also typical for adult animals. Enterocytes rich in fat and glycogen were only present on PD 1. In the large intestine the vacuolated cells were more frequently seen on PD 1 and 3 than in adult marmosets. The endocrine cells of newborn animals corresponded to those in the gastric and intestinal epithelium of mature animals, occurred everywhere in the lower digestive tract and could be subdivided at least into EC, ECL, D and L and EG cells respectively; a further subdivision was not possible by conventional transmission electron microscopy. Compared with rats, mice and guinea-pigs mostly used for developmental studies of the digestive tract, marmoset monkeys differed especially from the gastrointestinal epithelium of rats and mice but also from guinea-pigs. By contrast comparisons with the human situation are difficult due to the lack of representative electron microscopic findings on the gastrointestinal epithelium. If one considers the close phylogenic relationship between marmosets and man, the marmoset data should be transferable to the human situation rather than the findings obtained for rats, mice and guinea-pigs. In the epithelium of the adult gastrointestinal tract clear-out ultrastructural differences could not be found between these species.