41.   Zoonosis is an animal disease that can infect humans.

42.   Outbreaks of the disease are rare, and no one knows where the virus lives when it is not infecting humans.

43.   Pakdee said he will wait for a report from the World Health Organization on whether the cow disease can infect humans before deciding to lift the ban.

44.   Pierre Rollin, the head of the CDC team, said the virus had been identified as Ebola Sudan, one of three strains that can infect humans.

45.   Anthrax is an infectious disease of animals that can infect humans through skin contact, ingestion and even inhaling the contaminated spores.

46.   Anthrax, a hearty spore that can live on the ground or in water for years, can infect humans who breathe it.

47.   But scientists are worried that if the virus infects humans over a long period of time, it will adapt and begin to pass from person to person.

48.   Cattle catch the disease by ingesting spores from the anthrax bacteria, but humans rarely become infected.

49.   CJD is the form of bovine spongiform encephalopathy, also known as mad cow disease or BSE, which can infect humans.

50.   Cohen and Gurtler said in the study that just two dogs with the parasite are enough to infect five humans in an average household.