[Improvement of the productivity of goats in the periurban zone of N'Djamena (Chad). Choice of measures following an ecopathological inquiry].

A goat herd follow-up and an ecopathological survey on respiratory diseases were undertaken in Chad. Late puberty and high mortality were highlighted by the follow-up. Diseases were frequent and depended on the season. Few risk factors of respiratory diseases were shown by the ecopathological survey. Mortality was connected with 3 parasitic and infectious factors. Decreasing the age at puberty and the mortality rate are priorities. Measures to achieve these aims are well known. They must be set up within a development program, in interaction with research, for a good use by the goat farmer.