| impact of bse on livestock production system. | the small number of bse cases diagnosed in italy from january 2001 to 12 september 2001 (a total of 28, one every 9000 head) does not allow for a statistical analysis of the relationship between this disease and the livestock systems. however, some indications can be noted: (a) only dairy cattle, which represent three-quarters of the cattle raised in italy, are involved; (b) 58% of the cases belong to medium-large farms that breed 27% of all head; (c) 13 out of 28 cases are 5-year-old animals an ... | 2003 | 14535367 |