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Still Waters

New vaccine to stop spread of bovine TB

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Still Waters

Scientists at the University of Surrey have developed a novel vaccine and complementary skin test to protect cattle against bovine tuberculosis (bovine TB).

Publishing their findings in the journal Scientific Reports, researchers reveal they have for the first time created a vaccine that is compatible with a synthetic form of the tuberculin skin test (PPD), a legally required test used for the surveillance of TB in cattle throughout the UK.

Bovine TB is an infectious disease in cattle affecting their lungs, and those that test positive for the disease are culled. The BCG vaccine, which is currently used to protect humans against TB and is effective in cattle, is incompatible with the PPD test. Cattle that are vaccinated with the BCG vaccine, which contains a harmless strain of the bovine TB pathogen Mycobacterium bovis, produce a positive PPD test for TB making it impossible to distinguish, with the PPD skin test, if the animal has TB or has simply been vaccinated.

https://phys.org/news/2019-11-vaccine-bovine-tuberculosis.html

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