Résumé:
The weather, low rainfall, the breeding herd and aspects of rationing and nutrition that is generally not mastered, add reproductive disorders (metritis, pyrometer, retained placenta ... ..) as well as the presence and the persistence of some major diseases and other entities linked to adverse health conditions of livestock such as mastitis, diarrhea and neonatal mortality ... etc, are the constraints and the predominant causes that influence directly and threatens suitably reproduction and animal production.
Bovine brucellosis is one of the most widespread diseases in the world, with a high prevalence in the Mediterranean countries. In Algeria, despite control programs adopted by the state since 1970 and strengthened in 1995, brucellosis remains enzootic. The study in this modest manual is intended to demonstrate firstly epidemiological Infectious bovine brucellosis, sexually transmitted disease, major zoonosis therefore heavy economic loss, health, and social and secondly the effect of the disease in herds including dairy cows as fertility .The results are as following:
1) 10% of cattle has been screened for brucellosis and largely escapes the sanitary control in the wilaya of Mostaganem where the occurrence of brucellosis and its persistence in our farms.
2) the location of the eight farms that were the subject of investigation and prospecting, shows that these are poorly managed that hygiene is not respected, rationing food underestimated low milk production and finally the presence of some animal diseases clinically significant.
3) Laboratory testing (serological and bacteriological) show firstly that the prevalence of brucellosis is not insignificant; and secondly the presence of certain bacteria contamination and pathogens that could be potential sources of contamination from the environment to the animal caused by the mismanagement of farming conditions and poor hygiene.
