Bovine tuberculosis slaughter surveillance in the United States 2001–2010: assessment of its traceback investigation function

Table 1 Presence of animal ID and traceback success for domestic cattle disclosing lesions at slaughter, 2001–2010

Presence or absence of animal identification (ID) at slaughter	Successfully traced	Not successfully traced	Total number of cases
Domestic fed bovine TB cases
A U.S. form of ID and management ID	1	0	1
A U.S. form of ID	0	2	2
Management ID	6 (11%)	47 (89%)	53
No ID	3 (15%)	19 (86%)	22
Total	10 (13%)	68 (87%)	78
Domestic adult bovine TB cases
A U.S. form of ID and management ID	5 (83%)	1 (17%)	6
A U.S. form of ID	16 (84%)	3 (16%)	19
Management ID	4	0	4
No ID	5 (71%)	2 (29%)	7
Total	30 (83%)	6 (17%)	36
Overall domestic (fed & adult) bovine TB cases
A U.S. form of ID and management ID	6 (86%)	1 (14%)	7
A U.S. form of ID	16 (76%)	5 (24%)	21
Management ID	10 (18%)	47 (82%)	57
No ID	8 (30%)	21 (72%)	29
Grand Total	40 (35%)	74 (65%)	114

The findings of the forms of animal ID present at slaughter among the 114 domestic bovine TB cases and the outcome of the investigation with regard to tracing back to the herd of origin in the U.S. Domestic bovine TB cases found at slaughter had no animal ID or one or more forms of the following ID: management ID (farm specific ID; not country or state specific) and/or a U.S. form of ID (brucellosis vaccination tag, USDA backtag and/or NUES tag).

ISSN: 1746-6148