1.   When the blisters burst, they release virus particles that infect healthy animals.

2.   By infecting animals and letting them loose in the burrows, local epidemics of this disease could be created.

3.   Animals have been deliberately infected with the disease and then various tissues from their bodies used to try to infect test animals.

4.   Anthrax is caused by bacteria that typically infect animals.

5.   Apparently it takes far fewer spores to infect the animals, and the incubation period is only a fraction of that for humans.

6.   After an animal is infected, the virus moves from nerve cell to nerve cell until it gets to the brain.

7.   He said he and his colleagues already are infecting healthy animals with the bacteria to see if they develop atherosclerosis.

8.   If the animals are infected, the ticks pick up disease bacteria.

9.   In nature, anthrax is caused by bacteria that infect grazing animals such as cattle, sheep and goats.

10.   It is mosquitoes that carry the virus and infect animals with it.