South Dakota TB Strain Previously Found only in Mexico

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The Fence Post reports:  


Bovine Tuberculosis (TB) was identified in three beef cows during routine slaughter inspection by U.S. Department of Agriculture Food Safety Inspection Service inspectors at two Nebraska slaughter plants in February, 2017. The cows had been in feedlots in Nebraska and South Dakota since November, 2016.

Market records were used to identify the herd of origin, which was tested by state and federal animal health officials, revealing additional infected animals. The herd remains quarantined and 41 infected animals have been removed from the herd. Final disposition of remaining animals in the herd is being determined.

Thirteen adjacent herds, comprised of over 8,000 head, were quarantined for testing. One herd has been released from quarantine with negative results of testing in all cattle two years of age and older. Testing is in progress in the remaining adjacent herds and the majority of that work should be completed over the next three weeks.

The National Veterinary Services Laboratory in Ames, Iowa, has conducted whole genome analysis of the bacteria isolated from some of the affected animals from the Harding County herd. Experts have concluded that this strain of bacteria is nearly identical to a strain that is known to exist in dairy cattle in the Central region of Mexico and that it has not previously been identified in the U.S. This strain is not related to the recent strain found in Canadian cattle, previous cases identified in South Dakota cattle or in Michigan wildlife and livestock. 


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Source:  The Fence Post




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