11.   Then Corixa will test the compounds in primates to see whether they prevent the spread of tuberculosis.

12.   Under the current system, drug companies test promising compounds on patients using tightly controlled clinical trial procedures.

13.   When they test a new compound, a continuing glow means the bacteria survived while no glow indicates a potential lead.

14.   Before the compounds can be tested on humans, they have to be subjected to stringent toxicology tests.

15.   He said that some such compounds may be tested on humans within two years.

16.   However, prominent Colombian researcher Manuel Patarroyo says the compound was not tested on enough people to get accurate results.

17.   The next step is to test the compounds on animals to determine whether they are toxic, said Dr. Hernan Saguas.

18.   Three South African researchers who claimed a drug they developed reversed the effects of AIDS violated accepted procedures in testing the compound, an investigating committee said Wednesday.

19.   Both compounds were then tested against the development of precancerous lesions, using mouse mammary glands exposed to a common carcinogen.