Identification and Study of the Antibiotic Sensitivity of Bacteria Associated with Clinical Mastitis of Small Ruminants in the Region of Dakar

Abstract

Mastitis is one of the most important diseases in dairy farming. It is responsible for very important quantitative and qualitative economic losses. This condition is often overlooked in small ruminants and treatment is usually done without bacteriological analysis. The objective of this study was to investigate the bacterial causes of clinical mastitis in small ruminants and study their sensitivity to antibiotics. Hence, a study was conducted from December 2006 to September 2007 in urban and peri-urban area of Dakar, on 103 milk samples collected in small ruminants with clinical mastitis. Bacteriological analysis was used to isolate the vast majority of staphylococci, especially S. aureus (30%). The antibiogram revealed sensitivity of staphylococci and bacilli to gentamicin (100%). S. aureus had a good sensitivity to the association Trimethoprim-Sulfamethoxazole (66.67%), Doxycycline (66.67%), amoxicillin (66.67%) and ampicillin (62.5 %). On the contrary, considerable resistance to S. aureus to penicillin, the Norfloxacin and colistin was noted. In the light of these findings, recommendations were made for the treatment and prevention of clinical mastitis.

Keywords: Goat; Sheep; Clinical mastitis; Bacteria; antibiotics; Dakar