The increasing importance of public health programs in health and social services centers and the increasingly systematic contribution of community organizers to their implementation arouse questions regarding perpetuation of community organization’s bases in public institutions. Using the conceptual framework of socio-institutional approach, a research was undertaken to identify factors supporting or slowing down participation in community practices and public health programs. While recognizing the exploratory character of its conclusions, the study emphasizes the determining importance of mobilization-sized territories, programs funds management and institutional support to community organization so as to associate community and people to be joined in programs implementation.