3Malbe M E,Klaassen L,Kaartinen M,et al. Effects of oral se- lenium supplementation on mastitis markers and pathogens in Estonian cows. [J]. Vet Therapeutics, 2003, (4): 145-154.
4Walstra P, Wouters J T M, Geurts T J. Cheese composition and yield[M]. Boca Raton: Taylor Francis, 2006 : 631-639.
5Tripaldi C, Terramoccia S, Bartocci S, et al. The effect of so- matic cell count on yield composition and coagulating proper- ties of mediterranean buffalo milk[J]. Asian-Aust Anim Sci , 2003,(16): 738-742.
6Santos J E P, Cerri R L A, Ballou M A,et al. Effect of timing of first clinical mastitis occurrence on laetational and reproduc- tive performance of Holstein dairy cows[J]. Animal Reprod Sci, 2004, 80: 31-45, 49.
7Oliver S P, Jayarao B M, Almeida R A. Foodborne patho- gens, mastitis, milk quality and dairy food safety[R]. Orlan- do, FL:Proe. 44th NMC Annual Meeting, 2005 : 3-27.
9Atakan A. Study of somatic cell counts in the milk of holstein- friesian cows managed in mediterranean climatic conditions [J]. Turkish J Vet Anita Sci,2008,32(1) : 13-18.
