Study of antibiotic susceptibility and molecular identification of antibiotic resistance genes of staphylococci stains isolated from bovine mastitis in central region of Algeria

Saidi Radhwane

Abstract

 Mastitis has been recognized as a complex and the most costly disease in dairy herds. It imposes serious economic losses for the farmers and the dairy industry. Among the various pathogens isolated as agents responsible for bovine mastitis, Staphylococcus aureus is an etiological agent predominant in the subclinical and clinical forms of mastitis. Coagulase Negative Staphylococci (CNS) have traditionally been considered as minor pathogens but, during the last years, their importance has clearly increased and that they became the predominant pathogens isolated from subclinical mastitis in several countries [8-9]. These bacteria can cause mainly subclinical mastitis [6], but some authors reported high percentage of clinical cases evoked by CNS [10-11]. The disease is the most frequent reason for the use of antimicrobial agents on dairy farms.In many parts of the world, cure rates for staph infections are low after antibiotic treatment.