4Charls N,Dobbins J R. Mastitis losses[J]. J Am Vet Med Assoc, 1997 (170):1129-1132.
5Riekerink R G M O,Barkema H W,Veenstra S,et al. Prevalence of contagious mastitis pathogen sinbulk tank milk in Prince Edward Island[J].Can Vet J,2006,47(6) :567-572.
6Oliver S P,Mitchell B A. Prevalence of mastitis pathogens in herds participating in a mastitis control program [J]. J Dairy Sci, 1984.67 (10) : 2436-2440.
7Morin D E, Petersen G C, Whitmore H L, et al. Economic'. analysis of a mastitis monitoring and control program in four dairy herds[J ]. J Am Vel Med Assoc, 1993,202 (4) : 540-548.
8Watson D L,McColl M L,Davies H I. Field trial of a staphylococcal mastitis vaccine in dairy herds: clinical,subclinical and microbiological assessments[J]. Aust Vet J, 1996,74(6) :447-450.
9Calzolari A,Giraudo J A,Rampone H,et al. Field trials of a vaccine against bovine mastitis 2 Evaluation in two commercial dairy herds [ J ].J Dairy Sci, 1997,80(5 ) : 854-858.
10Leitner G,Yadlin N,Lubashevsy E,et al. Development of a Staphylococcus aureus vaccine against mastitis in dairy cows II Field trial[J]. Veterinary immunology and immunopathology, 2003,93 ( 3 ) : 153-158.
