The network approach: a means for the collection of integrated data following standardized protocols.

The understanding of the epidemiology of a vector borne disease, involving various vector and host species in a defined area requires a multidisciplinary approach. It is essential that specialists obtain data relevant to common objectives. In the case of African Trypanosomiasis this means that the observations being made on the health status of the human and domestic--and wild animal populations are made over the same period of time as those on the tsetse population to which these hosts are exposed. Standardization of methodology is a pre-condition for reliable comparison of observations. The creation of a network of research situations is one possibility for the fulfillment of this pre-condition; while at the same time it is a suitable means for the collection of integrated data. The African Trypanotolerant Livestock Network, created in 1982 is one example of such a network. Examples of conclusions which could be drawn after analysis of data collected over a two-year period through this Network are presented.