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

BMC Veterinary Research

Francisco J Olea-Popelka²  Kathleen A Orloski³  Heather M Humphrey¹ 

[1] Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Science, Colorado State University, Fort Collins 80523, Colorado, USA;Mycobacteria Research Laboratories (MRL), College of Veterinary Medicine and Biomedical Science, Colorado State University, Fort Collins 80523, Colorado, USA;Animal and Plant Health Inspection Service (APHIS), United States Department of Agriculture (USDA), Fort Collins 80523, Colorado, USA

关键词: Traceback;    Slaughter surveillance;    Cattle;    Bovine tuberculosis;   

Others  :  1119088
DOI  :  10.1186/s12917-014-0182-y

 received in 2014-02-10, accepted in 2014-08-07,  发布年份 2014

【 摘 要 】

Background

The success of tracing cattle to the herd of origin after the detection and confirmation of bovine tuberculosis (TB) lesions in cattle at slaughter is a critical component of the national bovine TB eradication program in the United States (U.S.). The aims of this study were to 1) quantify the number of bovine TB cases identified at slaughter that were successfully traced to their herd of origin in the U.S. during 2001–2010, 2) quantify the number of successful traceback investigations that found additional TB infected animals in the herd of origin or epidemiologically linked herds, and 3) describe the forms of animal identification present on domestic bovine TB cases and their association with traceback success.

Results

We analyzed 2001–2010 data in which 371 granulomatous lesions were confirmed as bovine TB. From these 114 bovine TB cases, 78 adults (i.e. sexually intact bovines greater than two years of age), and 36 fed (i.e. less than or equal to two years of age) were classified as domestic cattle (U.S. originated). Of these adults and fed cases, 83% and 13% were successfully traced, respectively. Of these traceback investigations, 70% of adult cases and 50% of fed cases identified additional bovine TB infected animals in the herd of origin or an epidemiologically linked herd. We found that the presence of various forms of animal identification on domestic bovine TB cases at slaughter may facilitate successful traceback investigations; however, they do not guarantee it.

Conclusions

These results provide valuable information with regard to epidemiological traceback investigations and serve as a baseline to aid U.S. officials when assessing the impact of newly implemented strategies as part of the national bovine TB eradication in the U.S.

【 授权许可】

   
2014 Humphrey et al.; licensee BioMed Central Ltd

【 图 表 】

Figure 1.

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