The 13 most severe, including brucellosis and leptospirosis (bacterial infections transmitted by body fluids), as well as bovine tuberculosis and rabies, lead to 2.4 billion cases of illness and 2.2m deaths a year, more than HIV/AIDS and diarrhoea.Intensive farming is one cause.
Since last autumn as many as 1,600 Yellowstone bison have been shot outside the park.The present effort now focuses first on eliminating the brucellosis threat.
Tottering stacks of brucellosis research have not resolved the dispute.
Landscape fragmentation and ranching have been linked with Lyme disease and brucellosis, says Dr Daszak.
The hogs, descendants of colonial-era livestock and, more recently, European wild boars introduced for sport, spread diseases such as brucellosis, can breed twice a year and, when hungry enough, will eat lambs.
But wild bison, which are held in federal and state preserves, number fewer than 20,000.The first reintroduction will probably take place in Alaska, where the Wood Bison, a larger cousin of the more familiar Plains Bison, is waiting to clear a two-year quarantine for brucellosis, a disease that afflicts both livestock and humans.
Stop them, bellow ranchers who fear the bison will infect their cattle with brucellosis, a nasty disease.
Cattlemen are especially nervous of them because they may carry brucellosis, or undulant fever, which can in theory be transmitted to cattle and cause spontaneous abortions.In this section Not whether, but how, to withdraw Dreams in the desert Putting families first The shaggiest prize Green clothes, green minds What's in a name?
Agglutination tests, which utilize serum samples of animals and microorganisms suspected of causing a disease, many times confirm the presence of the following bacterial diseases: brucellosis in cattle and swine, salmonellosis in swine, leptospirosis in cattle, and actinobacillosis in swine and cattle.
Immunity to a number of other diseases (for example, leprosy, leishmaniasis, coccidiosis, and brucellosis) also can be gauged by the presence or absence of a delayed reaction to a test injection of the appropriate antigen.
In humans, acute brucellosis lasts for two weeks and then may abate, but the symptoms often return with waves of fever (from which the name undulant fever was derived) in recurring bouts of illness for about six months or a year.
