at the beginning of the decentralization (1985) and forms part of the community committees, supporting not only the operation of the health services but the whole set of actions for social development. In this way they do not represent institutions or specific programs. However, in the regions with higher incidence of malaria in Tabasco, the program has considered that a specific speaker that prioritizes the antimalaria actions in the community is required (SST-J1, 1991). Community participation for malaria control is quantified by the program as the number of cases diagnosed as malaria by the voluntary collaborators and is identified as "passive search." These diagnoses plus those made by the health services represented 75% of the national total in 1990. In Campeche there is the perception that the communities have ceased to cooperate, that they rent the animals at 50,000 pesos per day (approximately $US16) (SCSPC-C5, 1991). This hampers the workers' mobility, especially out to the most remote communities. At present the treatment is left in the hands of the voluntary collaborators (SCSPC-C5, 1991), who form the community network for support of the malaria program. The cases diagnosed by the voluntary collaborators represented more than 50% of the annual total in the period analyzed (see Figure 1). It is possible that the material support of the malaria workers by the rural communities has decreased; however, what is important is their direct contribution for the control of malaria, through the diagnosis and treatment of cases, among other aspects not quantified by the program. It is necessary to consider the poverty in which the greatest part of the rural groups in Mexico are found; their income in the best of cases does not exceed the official minimum wage, which in 1990 was 11,000.00 Mexican pesos per day ($US4.00, approximately). Under these conditions, community participation is not only a philanthropic function, but also collective support for sur