31.   Drought will destroy crops and animals, produce famine and starvation everywhere and spread catastrophic diseases into every country.

32.   Development in rural areas can also spread the disease by bringing humans into close contact with previously isolated animals.

33.   Even a small opening in the bark is a gateway for micro-organisms that can spread disease through the tree.

34.   Every fall, mosquitoes that could be carrying the deadly West Nile virus, for example, are killed off before they multiply and spread the disease widely.

35.   Experts and health officials stress that the White Water E. coli outbreak is only the second known case of a pool spreading the disease.

36.   Feeds and protein supplements made from animals infected with the disease are considered one of the primary means by which mad cow disease is spread.

37.   Following the groundbreaking work of others, U.S. Army Dr. William Gorgas proposed killing the mosquitoes suspected of spreading the diseases.

38.   Fear of being dismissed from jobs and a belief among rural Africans that the disease is spread by witchcraft keep sufferers away from treatment.

39.   For instance, the aquarium urges consumers to avoid farmed salmon because the ocean pens in which they live can pollute the water with feces and spread disease.

40.   Fleas also spread disease, both to pets and people.