Disease JD Mycoplasma BVD Pos./No. tank samples (n) * Pos./No. tank samples (n) * Pos./No. tank samples (n) * 15/15 (1) 4/10 (1) 9/9 (1) 12/12 (1) 6/18 (1) 5/5 (2) 11/11 (1) 3/11 (1) 7/9 (1) 10/10 (5) 4/22 (1) 4/11 (1) 9/9 (1)   1/4 (1) 5/5 (9)   1/5 (3) 4/4 (1)   1/6 (3) 5/6 (2)   3/25 (1) 10/12 (1)   1/16 (1) 8/10 (1)     4/5 (2)     7/10 (1)     16/25 (1)     3/5 (2)     5/9 (1)     12/22 (1)     15/30 (1)     2/4 (1)     2/5 (4)     2/8 (1)     2/6 (2)     2/10 (2)     1/5 (7)     1/6 (1)     6/38 (1)     1/9 (1)     1/10 (3)     1/12 (1)     1/17 (1)     1/21 (1)     58 (38%) 4 (3%) 14 (9%) Total positive herds† 93 (62%) 147 (97%) 137 (91%) Total negative herds‡ * Number of samples that tested positive of the total number of tank samples collected from herds detected with that disease. (n) = the number of herds with that combination of test results †Total number and (percent) of herds positive for each disease ‡Total number and (percent) of herds test-negative for each disease

Table 1: Bulk tank test results for presence of Johne’s disease (JD), Mycoplasma spp. and Bovine Viral Diarrhea (BVD) in 151 dairy herds with 179 bulk tanks in Utah and parts of surrounding states. All combinations of proportion of positive samples and number of bulk tank samples collected are shown for each disease.