United States raw milk debate cows, and has been found in 100% of bulk milk tanks in dairy operations with over 500 cows. Consuming unpasteurized milk or under cooked meats could be pathways for human exposure to BLV. In November 2017, the US Centers for Disease Control and Prevention recommended medical treatment for anyone who had, within the previous six months, consumed raw milk products from Udder Milk, a New Jersey-based cooperative. An antibiotic resistant strain of Brucella abortus, which can cause the disease Brucellosis, was detected in at least one person who drank raw milk from the co-op. Advocates of drinking raw milk claim
The a2 Milk Company whether a cow produces the A2 or A1 type protein in its milk. The test allows the a2 Milk Company to license milk producers once proven their cows produce only A2 beta-casein protein in their milk, to the exclusion of the A1 beta-casein protein type. A2 Corporation licensed patents filed in the 1990s by the New Zealand Dairy Board, and filed its own patents on genetic tests to determine what form of beta-casein cows produce in milk, and concerning potential adverse health consequences of A1 milk. By 2012 A2 Corporation had developed a worldwide suite of intellectual property, including trademarks,