United States raw milk debate prior to symptom onset." Milk collected or stored in unsanitary conditions may harbor a host of disease-causing organisms (pathogens), such as "tuberculosis" (Mycobacterium bovis), the bacteria "Campylobacter" (Campylobacteriosis), "Escherichia" E. coli O157:H7), "Listeria" (Listeriosis), "Salmonella" (Salmonellosis), "Yersinia" (Yersinia enterocolitica), and "Brucella" (Brucellosis). Pasteurization consistently removes all of these pathogens, though they can be reintroduced if the product is handled carelessly. Thus dairy farms that pasteurize their milk can have unsanitary facilities without the attendant outbreaks of disease that would occur if a raw milk dairy kept its herds in similar unsanitary conditions. People with weakened immune systems, such as elderly,
Brucellosis "reliably" safe as the alternative. In the decades after Evans's work, it was worked out that this genus, which received the name "Brucella" in honor of Bruce, contained several species with varying virulence. The name "brucellosis" gradually replaced the 19th-century names Mediterranean fever and Malta fever. In 1989, neurologists in Saudi Arabia discovered "neurobrucellosis", a neurological involvement in brucellosis. These obsolete names have previously been applied to brucellosis: "Brucella" species were weaponized by several advanced countries by the mid-20th century. In 1954, "B. suis" became the first agent weaponized by the United States at its Pine Bluff Arsenal near Pine