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Brucellosis is an abortive disease that has been present in Congo since a few decades. A serological survey was conducted to evaluate the prevalence of brucellic infection in sheep and goat farms in Brazzaville area. 69 blood sera taken from samples of not immunized animals and in age of reproduction, were controlled by the Rose Bengal Test (RBT). At the end of the test, four sera were positive, giving an overall prevalence of 5.79%, confirming the hypothesis of the presence of brucellosis in the congolese sheep and goat herd. A variation in the rate of infection between districts, sexes and species was observed. The highest prevalence rate was noted in District 2 Bacongo (4.34%). Flock prevalence was 15%. All animals found to be positive are female. Sheep are more affected than goats, 4.34% against 1.44%. The infection is perpetuated in herds because of the traditional practices of breeding working without animal health monitoring with numerous exchanges of breeding stock.
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