6Rupp P E, Archer G L. Coagulate-negative staphylo cocci: pathogens associated with medical progress [J]. Clin Infect Dis, 1994, 19(6):231.
7Martin de Nicolds M M, Vindel A , Offez Nieto J A. Epidemiological typing of clinically signi{icant strains of coagulase-negative staphylococci [J]. Journal o{ Hospital Infection, 1995, 29(1) :35-43.
8Harmon R J, Langlois B E. Mastitis due to coagulase negative Staphylococcus species [J]. Agri Practice, 1989, 10(1):29-34.