11.   Scientists from the University of Georgia have determined what is causing the disease, Serratia marcescens, a bacterium found in human feces.

12.   Since the bacteria is only found in the mouth, it is most likely that it was sucked back into the tools and into the waterlines during dental procedures.

13.   That building, in the Arvida Park of Commerce, has been closed by the FBI because the anthrax bacterium was found there.

14.   The bacteria are normally found in the intestines and in soil.

15.   The bacteria is found in the large intestines of cattle, and experts say it cannot easily be transmitted through the air or by casual contact.

16.   The bacteria was found on a desktop in an area used mostly by state police.

17.   The bacteria are found naturally and are common in Gulf of Mexico oysters, the FDA says.

18.   The bacteria are usually found in the manure of animals like cows.

19.   The bacteria have been found in studies of freshwater fish.

20.   The bacteria also was found on a stairwell between the eight and ninth floors of the building and in an air conditioning filter on the ninth floor.