Wisconsin:More cattle found infected with TB

A series of whole-herd tests have found several more cattle infected with bovine tuberculosis in a Dane County herd. The animal health incident began in late September when a cow at slaughter had lesions in its lungs consistent with TB.The incident is unusual since Wisconsin has had TB-free status since 1980 and staff at her branch of the agency have no experience dealing with this kind of incident – although they have regular drills to rehearse what to do in cases like this.The genetic testing of the organism isolated from that first cow, which was diagnosed with the disease at slaughter, showed that it matched the DNA of a tuberculosis organism isolated from a worker who had been diagnosed with the disease when he was employed at the farm briefly in 2015.